Nitrous questions...
07-24-09, 09:44 AM
#26
Man... you're not going to believe this one.
SUMMIT guy sends my order and little things were missing that we specificly went over together.... so I have to call again and re-order a bunch of misc stuff that adds up to another 70sumthing $$$$. Whatever, no big deal.
But this one blows my mind. The guy helped me piece together the whole order which took about an hour both times. Jets came seperatly the next day b/c he wanted to talk to HOLLEY first... So jetting package arrives just now a day behind the 1st package.... w/only 3 jets. WOW
These guys suck.
SUMMIT guy sends my order and little things were missing that we specificly went over together.... so I have to call again and re-order a bunch of misc stuff that adds up to another 70sumthing $$$$. Whatever, no big deal.
But this one blows my mind. The guy helped me piece together the whole order which took about an hour both times. Jets came seperatly the next day b/c he wanted to talk to HOLLEY first... So jetting package arrives just now a day behind the 1st package.... w/only 3 jets. WOW
These guys suck.
07-24-09, 12:47 PM
#28
I just spoke to Holley guy again. This one seemed on point and knowledgable.
Turns out Summit guy sent me .018 jets, which equal a 25 shot... not 50, which is cool because now I can get into it a little easier.
Also he sent me (or at least attempted to send me) .018 jetts for both fuel and N2O. According to my pops he thinks I should get a richer fuel jetting and come down if need be instead of being too lean and having to go up. So.... I'm ordering another pair of .022 for fuel.
VMA, I think I'll be alright on the fuel end. I have a Holley Blue and a 1/2" feed from the tank to all the way up front. Might use two seperate regualtors though...? Not sure yet.
Also the hard line which was in question of being too small (1/8") is good for up to 150 shot on each nozzle / fogger.
Turns out Summit guy sent me .018 jets, which equal a 25 shot... not 50, which is cool because now I can get into it a little easier.
Also he sent me (or at least attempted to send me) .018 jetts for both fuel and N2O. According to my pops he thinks I should get a richer fuel jetting and come down if need be instead of being too lean and having to go up. So.... I'm ordering another pair of .022 for fuel.
VMA, I think I'll be alright on the fuel end. I have a Holley Blue and a 1/2" feed from the tank to all the way up front. Might use two seperate regualtors though...? Not sure yet.
Also the hard line which was in question of being too small (1/8") is good for up to 150 shot on each nozzle / fogger.
10-20-09, 09:53 AM
#30
Alrighty, so everything's finally hooked up and I tested it out last night. With a half full bottle, & being kinda cold out so the bottle was cold, using only a 25 shot on a used and abused high milage 12A w/the leak of death (ha) it worked fine.
I used it WOT in third, and WOT in fourth, until I started running out of road, I could DEFINATLY feel it pepping up the motor. Nothing to brag about, but it didn't backfire, sputter, foul or blacken plugs... so all is well.
RX7Project... thanks for that link. It has come in SUPER HANDY...!!!
I used it WOT in third, and WOT in fourth, until I started running out of road, I could DEFINATLY feel it pepping up the motor. Nothing to brag about, but it didn't backfire, sputter, foul or blacken plugs... so all is well.
RX7Project... thanks for that link. It has come in SUPER HANDY...!!!
10-20-09, 04:22 PM
#31
common sense prevails....
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Alrighty, so everything's finally hooked up and I tested it out last night. With a half full bottle, & being kinda cold out so the bottle was cold, using only a 25 shot on a used and abused high milage 12A w/the leak of death (ha) it worked fine.
I used it WOT in third, and WOT in fourth, until I started running out of road, I could DEFINATLY feel it pepping up the motor. Nothing to brag about, but it didn't backfire, sputter, foul or blacken plugs... so all is well.
RX7Project... thanks for that link. It has come in SUPER HANDY...!!!
I used it WOT in third, and WOT in fourth, until I started running out of road, I could DEFINATLY feel it pepping up the motor. Nothing to brag about, but it didn't backfire, sputter, foul or blacken plugs... so all is well.
RX7Project... thanks for that link. It has come in SUPER HANDY...!!!
Congrads on doing it! Let us know how it goes!!
10-20-09, 04:29 PM
#32
Alrighty, so everything's finally hooked up and I tested it out last night. With a half full bottle, & being kinda cold out so the bottle was cold, using only a 25 shot on a used and abused high milage 12A w/the leak of death (ha) it worked fine.
I used it WOT in third, and WOT in fourth, until I started running out of road, I could DEFINATLY feel it pepping up the motor. Nothing to brag about, but it didn't backfire, sputter, foul or blacken plugs... so all is well.
RX7Project... thanks for that link. It has come in SUPER HANDY...!!!
I used it WOT in third, and WOT in fourth, until I started running out of road, I could DEFINATLY feel it pepping up the motor. Nothing to brag about, but it didn't backfire, sputter, foul or blacken plugs... so all is well.
RX7Project... thanks for that link. It has come in SUPER HANDY...!!!
10-20-09, 05:59 PM
#33
I thought I had / summit sent me the jettings for a 50 shot... but after using that link above the size calculates to a 25 shot total.
I already have the jettings for a 100 shot total.
I was going to ease into going bigger but since I already have them....
Sure I don't mind taking pics and even part #'s of what I used. This website is my lifeline at times, if I can ever contribute back at all... I'm all for it.
I already have the jettings for a 100 shot total.
I was going to ease into going bigger but since I already have them....
Sure I don't mind taking pics and even part #'s of what I used. This website is my lifeline at times, if I can ever contribute back at all... I'm all for it.
10-21-09, 01:16 PM
#34
common sense prevails....
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I thought I had / summit sent me the jettings for a 50 shot... but after using that link above the size calculates to a 25 shot total.
I already have the jettings for a 100 shot total.
I was going to ease into going bigger but since I already have them....
Sure I don't mind taking pics and even part #'s of what I used. This website is my lifeline at times, if I can ever contribute back at all... I'm all for it.
I already have the jettings for a 100 shot total.
I was going to ease into going bigger but since I already have them....
Sure I don't mind taking pics and even part #'s of what I used. This website is my lifeline at times, if I can ever contribute back at all... I'm all for it.
I think if you have a good exhaust system, you should be able to go up to 75-100 HP with no problems.
10-21-09, 01:47 PM
#35
It was actually a pretty easy install.
The only reason it took me over three months is b/c the car I put it in
needed much attention in other areas
just to be road worthy
let alone use nitrous on it.
Here's a pic of under the hood...
Here's a pic of where I put the main power button (red covered switch on center console)
and the activation button on the steering wheel.
The bottles out to go get a refill...
I'll snap a pic later even though it's pretty straight foward.
The only reason it took me over three months is b/c the car I put it in
needed much attention in other areas
just to be road worthy
let alone use nitrous on it.
Here's a pic of under the hood...
Here's a pic of where I put the main power button (red covered switch on center console)
and the activation button on the steering wheel.
The bottles out to go get a refill...
I'll snap a pic later even though it's pretty straight foward.
10-21-09, 06:06 PM
#38
common sense prevails....
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It was actually a pretty easy install.
The only reason it took me over three months is b/c the car I put it in
needed much attention in other areas
just to be road worthy
let alone use nitrous on it.
Here's a pic of under the hood...
Here's a pic of where I put the main power button (red covered switch on center console)
and the activation button on the steering wheel.
The bottles out to go get a refill...
I'll snap a pic later even though it's pretty straight foward.
The only reason it took me over three months is b/c the car I put it in
needed much attention in other areas
just to be road worthy
let alone use nitrous on it.
Here's a pic of under the hood...
Here's a pic of where I put the main power button (red covered switch on center console)
and the activation button on the steering wheel.
The bottles out to go get a refill...
I'll snap a pic later even though it's pretty straight foward.
My concern is "most" nitrous systems are designed to run off 6 psi of fuel.....most webers want 3-4 psi...
Have you jetted according to only the "low" fuel pressure you should be feeding your weber??
If your kit is jetted like it should be running 6 psi and you are running half that psi, you will go lean!!
I would suggest to NOT bump up the HP of the kit until you have addressed this...
10-21-09, 07:22 PM
#39
I actually used the calculator RX7Project posted above. It asks you how much fuel pressure and I put 4.5 If I go and insert 6.0 or 7.0 psi the jettings change, so yea I'm running the calculated amount for the lower psi.
We pulled the plugs after boths runs and they looked good. Neither rich nor lean.
My pops followed behind me the whole time in his car watching for backfires and there were none. Also it felt real smooth to me driving, no sputtering or breaking up. If it did I would of immediatly let off.
I ordered the jets for a 50 shot. At 8.95 a pop it adds up quick when your on a budget, ha.
We pulled the plugs after boths runs and they looked good. Neither rich nor lean.
My pops followed behind me the whole time in his car watching for backfires and there were none. Also it felt real smooth to me driving, no sputtering or breaking up. If it did I would of immediatly let off.
I ordered the jets for a 50 shot. At 8.95 a pop it adds up quick when your on a budget, ha.
10-21-09, 08:41 PM
#40
common sense prevails....
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Just be careful... I have been searching the internet for information concerning running (lower than 6 psi)....... you are reading that guys "theory" running 4 psi..... In "theory" I could be ******* Britney Spears tonight but in the real world...that is not going to happen..
I have not found one instance of people running lower than 6 psi and nitrous...
I have not found one instance of people running lower than 6 psi and nitrous...
10-21-09, 09:29 PM
#41
My father's 9 second Dodge Demon.
I called him after I read your last post and ran by what you had said about being careful w/the low psi (actually read it word for word to him).
He told me the carb on his Demon liked 7 psi but the nitrous did not. Instead of going down in jet sizes on the nitrous he ran a seperate line off the regulator which pushed 7psi and then he put another in-line regulator dropping it down to 4psi to feed a holley plate (16hole bar...?) pushing/a 175 shot.
He's got a few fast cars all of them have nitrous, so hey I'm gonna listen to the man. It appears he's actually starting to like the RX now instead of constantly telling me to get rid of that thing.
I'm going to try the 50 shot and take it from there.
I called him after I read your last post and ran by what you had said about being careful w/the low psi (actually read it word for word to him).
He told me the carb on his Demon liked 7 psi but the nitrous did not. Instead of going down in jet sizes on the nitrous he ran a seperate line off the regulator which pushed 7psi and then he put another in-line regulator dropping it down to 4psi to feed a holley plate (16hole bar...?) pushing/a 175 shot.
He's got a few fast cars all of them have nitrous, so hey I'm gonna listen to the man. It appears he's actually starting to like the RX now instead of constantly telling me to get rid of that thing.
I'm going to try the 50 shot and take it from there.
10-22-09, 07:20 AM
#42
common sense prevails....
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My father's 9 second Dodge Demon.
I called him after I read your last post and ran by what you had said about being careful w/the low psi (actually read it word for word to him).
He told me the carb on his Demon liked 7 psi but the nitrous did not. Instead of going down in jet sizes on the nitrous he ran a seperate line off the regulator which pushed 7psi and then he put another in-line regulator dropping it down to 4psi to feed a holley plate (16hole bar...?) pushing/a 175 shot.
He's got a few fast cars all of them have nitrous, so hey I'm gonna listen to the man. It appears he's actually starting to like the RX now instead of constantly telling me to get rid of that thing.
I'm going to try the 50 shot and take it from there.
I called him after I read your last post and ran by what you had said about being careful w/the low psi (actually read it word for word to him).
He told me the carb on his Demon liked 7 psi but the nitrous did not. Instead of going down in jet sizes on the nitrous he ran a seperate line off the regulator which pushed 7psi and then he put another in-line regulator dropping it down to 4psi to feed a holley plate (16hole bar...?) pushing/a 175 shot.
He's got a few fast cars all of them have nitrous, so hey I'm gonna listen to the man. It appears he's actually starting to like the RX now instead of constantly telling me to get rid of that thing.
I'm going to try the 50 shot and take it from there.
How is your weber liking 4.5 psi??? I thought they were supposed to be fed with 2.5-3 psi... No flooding???
My experience with nitrous.....keep an eye on those plugs... they are the "window" to your combustion process...
10-22-09, 03:52 PM
#43
The car is finiky. This car was sitting for 6-7 years before I started tinkering with it. When I tell you everything that can go wrong has... that would prob be a understatement.
It's a Mikuni, which I believe calls for 4.5'ish psi. At that high it would drip out the horns when sitting idel for a little while, so I dropped it to 4 psi. and all seemed well for awhile until....
Just the other day I had it up in the air ideling for a bit while I was under her checking for exhaust leaks, when it started dripping out the horns again...??? Today I had her ideling for 20 min w/out any problems...?? Go figure.
I just got back from a cruise to the speed shop to fill the bottle and something weird happened on the way back. I went to jump on it gettting on the pkwy for a big open stretch and she fell flat on her face and backfired...??? Feathered the pedal and it cleared up..???
I guess I'm going to pull / check / clean / replace the fuel filters as a start.
Anyways, picked up the 50 jets, filled the bottle, and got a blowdown tube and saftey valve. Since the bottle is in the car with the driver it's mandatory at the track.
It's a Mikuni, which I believe calls for 4.5'ish psi. At that high it would drip out the horns when sitting idel for a little while, so I dropped it to 4 psi. and all seemed well for awhile until....
Just the other day I had it up in the air ideling for a bit while I was under her checking for exhaust leaks, when it started dripping out the horns again...??? Today I had her ideling for 20 min w/out any problems...?? Go figure.
I just got back from a cruise to the speed shop to fill the bottle and something weird happened on the way back. I went to jump on it gettting on the pkwy for a big open stretch and she fell flat on her face and backfired...??? Feathered the pedal and it cleared up..???
I guess I'm going to pull / check / clean / replace the fuel filters as a start.
Anyways, picked up the 50 jets, filled the bottle, and got a blowdown tube and saftey valve. Since the bottle is in the car with the driver it's mandatory at the track.
10-22-09, 10:17 PM
#44
common sense prevails....
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Possible the Mikuni is a weber copy...just like the Japanese OER carb being basically an exact Weber copy.
Try running 2.5 to 3 psi to the weber... see how it works out that time.
I still am so very concerned about your fuel system especially if you have to ratchet down your fuel pressure...
If it was my car I would do one of the two different fuel systems..
Holley blue or Mallory 140GPM in the back... two fuel pressure regulators (holley low pressure to the carb, holley high pressure to the nbitrous system) soooo you can run 2.5 to the mikuni...6 psi to the N2O system (that will help with improved atomization)
Or.... use the fuel system you have for the carb only...set to 2.5-3 psi..
then put a small 1 gallon or less fuel cell under your hood with its own fuel pump and fuel pressure reg...this goes to nitrous only.. This way you can run simple 87 octane fuel to the carb and run 93 or race fuel or even better methanol to the nitrous system for even more power..
Trust me...I know..I used to run 400+ HP nitrous on cars before.. It is SO IMPORTANT running high HP to have a "perfect" fuel system...
Talk to your dad and think about it!!
Try running 2.5 to 3 psi to the weber... see how it works out that time.
I still am so very concerned about your fuel system especially if you have to ratchet down your fuel pressure...
If it was my car I would do one of the two different fuel systems..
Holley blue or Mallory 140GPM in the back... two fuel pressure regulators (holley low pressure to the carb, holley high pressure to the nbitrous system) soooo you can run 2.5 to the mikuni...6 psi to the N2O system (that will help with improved atomization)
Or.... use the fuel system you have for the carb only...set to 2.5-3 psi..
then put a small 1 gallon or less fuel cell under your hood with its own fuel pump and fuel pressure reg...this goes to nitrous only.. This way you can run simple 87 octane fuel to the carb and run 93 or race fuel or even better methanol to the nitrous system for even more power..
Trust me...I know..I used to run 400+ HP nitrous on cars before.. It is SO IMPORTANT running high HP to have a "perfect" fuel system...
Talk to your dad and think about it!!
10-23-09, 12:11 AM
#46
I'm having other issues right now that are preventing me from even driving the thing at the moment.
Until they are all sorted out this nitrous nonsense is on hold.
I've already put a Holley Blue pump.
Carb's definatly a Mikuni N44PHH. I rebuilt it a few months back.
Until they are all sorted out this nitrous nonsense is on hold.
I've already put a Holley Blue pump.
Carb's definatly a Mikuni N44PHH. I rebuilt it a few months back.
10-23-09, 12:40 AM
#48
Stock ignition, stock timing, stock 12A, high milage, two dowel pin leaks, stock clutch...
The car sat for 6-7 years. Everything that could leak did. I fixed all the leaks except the dowel pins. I would pull the motor and re-do it but the last motor I tore apart that had high milage and was driven on the leak of death for quite some time wasn't worth **** inside so she stays.
The car sat for 6-7 years. Everything that could leak did. I fixed all the leaks except the dowel pins. I would pull the motor and re-do it but the last motor I tore apart that had high milage and was driven on the leak of death for quite some time wasn't worth **** inside so she stays.
10-23-09, 08:02 AM
#49
Stock ignition, stock timing, stock 12A, high milage, two dowel pin leaks, stock clutch...
The car sat for 6-7 years. Everything that could leak did. I fixed all the leaks except the dowel pins. I would pull the motor and re-do it but the last motor I tore apart that had high milage and was driven on the leak of death for quite some time wasn't worth **** inside so she stays.
The car sat for 6-7 years. Everything that could leak did. I fixed all the leaks except the dowel pins. I would pull the motor and re-do it but the last motor I tore apart that had high milage and was driven on the leak of death for quite some time wasn't worth **** inside so she stays.
Thanks again.
10-23-09, 08:27 AM
#50
This is not my daily driver, more like my daily fixer.
I have 3 12A's as spares, one I just refreshened.
And a 13B I'm building that eventually is going to make it's way in there.
So popping a motor, obviously I don't want to, but I'm prepared if it does happen.
I have 3 12A's as spares, one I just refreshened.
And a 13B I'm building that eventually is going to make it's way in there.
So popping a motor, obviously I don't want to, but I'm prepared if it does happen.