Newb needs help quick!
#1
Junior Member
Thread Starter
Join Date: Jan 2008
Location: NAS Lemoore, CA
Posts: 6
Likes: 0
Received 0 Likes
on
0 Posts
Newb needs help quick!
Hey gang,
I don't have an RX7, but my buddy does and I'm helping him do some work this weekend, so I have a quick question.
He has a 93 Twin Turbo that is basically stock. He bought a Manual Boost Controller for it today, it will be here on Friday and we're going to install it. I have quite a bit of experience with turbo cars, but never anything twin turbo. What is the difference in installing this MBC? I haven't gotten a chance to look at the car yet, but I'm assuming it has two vacuum lines, one to each wastegate actuator. Is that right? So how does that work with a MBC? Do I do 1 line from the intake to the MBC, then have the second line out of the MBC split into 2, one for each turbo?
Any help would be appreciated!
Thank you so much.
I don't have an RX7, but my buddy does and I'm helping him do some work this weekend, so I have a quick question.
He has a 93 Twin Turbo that is basically stock. He bought a Manual Boost Controller for it today, it will be here on Friday and we're going to install it. I have quite a bit of experience with turbo cars, but never anything twin turbo. What is the difference in installing this MBC? I haven't gotten a chance to look at the car yet, but I'm assuming it has two vacuum lines, one to each wastegate actuator. Is that right? So how does that work with a MBC? Do I do 1 line from the intake to the MBC, then have the second line out of the MBC split into 2, one for each turbo?
Any help would be appreciated!
Thank you so much.
#4
Junior Member
Thread Starter
Join Date: Jan 2008
Location: NAS Lemoore, CA
Posts: 6
Likes: 0
Received 0 Likes
on
0 Posts
I can just install the MBC where it said for the primary turbo, without messing with the Secondary turbo Pre-spool controller, right? Because that sounds a lot more complicated than I anticipated. If it were my car, I would mess with it, but my buddy just got his car, knows nothing about it, and is taking my word that I won't blow it up.
He has aftermarket intakes, FMIC, downpipe, and just wants to add a couple lbs of boost, that is our goal with this MBC.
He has aftermarket intakes, FMIC, downpipe, and just wants to add a couple lbs of boost, that is our goal with this MBC.
#5
Eats, Sleeps, Dreams Rotary
iTrader: (14)
Unless your buddy has $5k to drop on a new engine, you do not just want to 'add a couple lbs of boost' to this car. With the stock ECU you should not go over 10 psi. If anything you should be reducing the boost to compensate for the IC, intake and downpipe. You need to read the FAQ.
#6
Full Member
iTrader: (1)
Join Date: Sep 2004
Location: NY
Posts: 234
Likes: 0
Received 0 Likes
on
0 Posts
Don't mess with it. It sounds like the car is much more complicated then what you're used to (not trying to put down your turbo knowledge) But like the previous post said, just adding more boost is going to cause lots of expensive problems.
Just my 2C.
Just my 2C.
#7
Junior Member
Thread Starter
Join Date: Jan 2008
Location: NAS Lemoore, CA
Posts: 6
Likes: 0
Received 0 Likes
on
0 Posts
Alright then, lets go another way with this. I'm sure he'll want to keep it safe and reliable, and maybe drop it a couple psi, because he said he runs between 11-13 lbs now. So, to drop a couple psi with a MBC, can I just install it in the vacuum line to the primary turbo, and leave the secondary turbo alone?
I just got confused with the How-to talking about the Secondary turbo pre-spool controller, etc.
Thanks for the tips
I just got confused with the How-to talking about the Secondary turbo pre-spool controller, etc.
Thanks for the tips
Trending Topics
#8
Top's always down
iTrader: (5)
There's only one waste gate. You want to install the boost controller in the vac line for the waste gate, unless you're having transition problems. Don't change anything with the precontrol, or you'll cause a whole new set of issues...
And like they said above, with a stock ECU, keep it at 10PSI.
And like they said above, with a stock ECU, keep it at 10PSI.
#10
Junior Member
Thread Starter
Join Date: Jan 2008
Location: NAS Lemoore, CA
Posts: 6
Likes: 0
Received 0 Likes
on
0 Posts
Outstanding!
I didn't know there was only one wastegate. That was where I was getting confused. I will talk to him tomorrow and find out exactly what mods are done. He bought it the way it is, but is still in contact with the previous owner. He might have more stuff done to it besides what I listed. I'll make sure we leave it at 10 if he is still running the stock ECU and stuff.
Thanks for the help, I think we'll be good now. However, I am definetely going to keep reading up on these cars, just by the off chance I work on one again.
A TOTALLY DIFFERENT ANIMAL!
I do have plans for a 13B powered Datsun 510 someday, so I guess I need to enhance my rotary knowledge.
Thanks again!
I didn't know there was only one wastegate. That was where I was getting confused. I will talk to him tomorrow and find out exactly what mods are done. He bought it the way it is, but is still in contact with the previous owner. He might have more stuff done to it besides what I listed. I'll make sure we leave it at 10 if he is still running the stock ECU and stuff.
Thanks for the help, I think we'll be good now. However, I am definetely going to keep reading up on these cars, just by the off chance I work on one again.
A TOTALLY DIFFERENT ANIMAL!
I do have plans for a 13B powered Datsun 510 someday, so I guess I need to enhance my rotary knowledge.
Thanks again!
#14
VV That's mine VV
Join Date: Jan 2007
Location: Chapel Hill, NC
Posts: 583
Likes: 0
Received 0 Likes
on
0 Posts
I was under the impression that the actuator right next to the wastegate actuator (and looks freakin' identical) is the pre-control actuator, not another wastegate actuator - so one wastegate. . .
#16
VV That's mine VV
Join Date: Jan 2007
Location: Chapel Hill, NC
Posts: 583
Likes: 0
Received 0 Likes
on
0 Posts
#17
RX7FD3S
iTrader: (3)
http://www.clubrx.org/default.asp?id...ntent=68&mnu=5
#18
Eats, Sleeps, Dreams Rotary
iTrader: (14)
Teeing them up is not necessary. Attaching a boost controller to the wastegate line only is sufficient. I know that some people do this but since the wastegate and prespool actuators have different activation points stock (because there are different pill sizes in each line) I'm not sure why.
#19
Junior Member
Thread Starter
Join Date: Jan 2008
Location: NAS Lemoore, CA
Posts: 6
Likes: 0
Received 0 Likes
on
0 Posts
Thanks for the help guys, I sure appreciate it. I did some other reading about it last night and I think I have a pretty good grasp of the system. Thanks again,
#20
Team Benjos Captain
iTrader: (2)
Join Date: Aug 2005
Location: Greenwood/Hartsville, SC.
Posts: 2,720
Likes: 0
Received 1 Like
on
1 Post
If your buddy wants to up the boost a little bit, and do it reliably and without spending tons of cash on a new tune and fuel system, tell him to get a reprogrammed ecu. Pettit racing sells one as do other manufacturers such as RE Amemiya and Knightsport. Normally you can find them on the board or on ebay for pretty cheap.
Thread
Thread Starter
Forum
Replies
Last Post
eplusz
General Rotary Tech Support
15
10-07-15 04:04 PM
Adaptronic MTX-L to adaptronic question
TeamRuffRacing
Adaptronic Engine Mgmt - AUS
1
09-30-15 08:13 PM