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Originally Posted by MAXX65
(Post 7978826)
Its best not to bump up the boost till you have tuned it properly.
Although, per my reserch about 99 twins, just installed a set a month ago, they are ment to run 11 psi with a 99 spec ECU. however; without the 99 ECU or a PFC your really don't want to push the engine. Bad engine management equals a rolling frame. stay stock boost till you have a good management system. This is just my 2 cents. I'm the type that believes in doing it all at one time the right way or not doing it at all. Hey Jason, how are those '99 twins working out for you? |
Thanks for asking...
After figuring out the engine was flooded, I finally got it started on Weds. within 5 min. of being started the temp gauge went through the roof and the coolent started boiling and I got some smoke from the engine bay. I think its either a clogged coolent line or the water pump. Unfortunetly I am limited on time to get under the hood, so it will probably be another month before I can get back to the car. hopefully it will be a quick fix, so I can focuse my time on installing my PFC and boost controller. Its fun to work on cars when your making it better, not making it run! |
Sorry to hear you're having trouble with it, it's more fun when you get to drive them more than work on them too. Let me know if you need a new water pump, I should have one laying around from my old motor.
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I have 99 specs. I think they spool faster. If you are going to buy them new go with BNR's.
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Originally Posted by MAXX65
(Post 7978826)
Its best not to bump up the boost till you have tuned it properly.
Although, per my reserch about 99 twins, just installed a set a month ago, they are ment to run 11 psi with a 99 spec ECU. however; without the 99 ECU or a PFC your really don't want to push the engine. Bad engine management equals a rolling frame. stay stock boost till you have a good management system. This is just my 2 cents. I'm the type that believes in doing it all at one time the right way or not doing it at all. |
You can buy a pre-programmed ecu on this board. RE Amemiya, Knightsports, XS Engineering, and a few others have stock ecu's that they reprogram for more mods and higher boost. You'll just swap out ecu's and then you'll be able to safely raise the boost for whatever it's been programmed to. Most of these have a limit of around 14-16psi, which is basically the limit of what you can do with stock twins anyway.
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Originally Posted by FallenCho
(Post 7896693)
Everyone always says go single but everyone forgets that you are far from street legal when going this route ...
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Originally Posted by GoodfellaFD3S
(Post 7895234)
Negative, they are LESS reliable at higher boost levels.
I think we need a sticky thread at the top of this section on this subject :) Not as active on the forum as I used to be, just curious where the 99 are less reliable comes from? Tim |
FWIW, I also got 343 hp on a stock internal motor, stock seq. turbos that are probably tired with 104k miles. But I can do 11.19 @ 123.8 in the 1/4 mile and many people here think that the dyno must be wrong and that I should be making more than 343 hp. I'm thinking about getting and trying out a set of low mile stock seq. turbos and see if I can make more power, or maybe try to get some low miles full non seq. turbos to try out and get into the 10s (would like to do that with seq. turbos). I wouldn't spend the money for the 99 spec. BNR's would be nice but I got the car fast enough already with stock turbos that it wouldn't be worth it for me to pay for BNRs now.
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Originally Posted by Tim Benton
(Post 7982028)
Rich,
Not as active on the forum as I used to be, just curious where the 99 are less reliable comes from? Tim |
After reading a lot and talking to a lot of people I think the 99spec turbo upgrade is over rated. From what I have heard/read the OEM turbos are capable of hp numbers as higher or higher than the 99spec. People claim the 99spec spool quicker, but I have yet to find any documented evidence that this is true. I don't know if there is any way to plot boost or hp vs response time, but if there is I have't found it yet. Everything I have found plots hp vs rpm only. IMO, that'a a lot of $$$ for such a small return...think I'll use my $$$ to improve the fuel and ignition in preparation for the BNR's. Anybody looking for a good set of slightly used 99 spec turbos?
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i think that it prob is overrated too...i mean my car is a 2001 so it comes with the turbos but I wouldnt buy them if my car had the older spec turbos.
my 2c |
and what if u need new twins neway? THEN what would you guys suggest?
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Originally Posted by dblboinger
(Post 7985999)
After reading a lot and talking to a lot of people I think the 99spec turbo upgrade is over rated. From what I have heard/read the OEM turbos are capable of hp numbers as higher or higher than the 99spec. People claim the 99spec spool quicker, but I have yet to find any documented evidence that this is true. I don't know if there is any way to plot boost or hp vs response time, but if there is I have't found it yet. Everything I have found plots hp vs rpm only. IMO, that'a a lot of $$$ for such a small return...think I'll use my $$$ to improve the fuel and ignition in preparation for the BNR's. Anybody looking for a good set of slightly used 99 spec turbos?
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Originally Posted by ahad
(Post 7990859)
and what if u need new twins neway? THEN what would you guys suggest?
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Unless you can get them for a good price like I did, you should go with BNR if you want to stay with twins. her is the web site: http://www.bnrturbos.com/3rdGen.htm
I wanted to go BNR, but the wallet was not permitting it at the time, maybe next year. They are $2350 U.S. I think it was goodfellaFD3s that made 400+ rwhp on his twin BNRs. (I could be wrong since i've seen a lot of peoples numbers on this forum.) |
Originally Posted by XxMerlinxX
(Post 7981128)
You can buy a pre-programmed ecu on this board. RE Amemiya, Knightsports, XS Engineering, and a few others have stock ecu's that they reprogram for more mods and higher boost. You'll just swap out ecu's and then you'll be able to safely raise the boost for whatever it's been programmed to. Most of these have a limit of around 14-16psi, which is basically the limit of what you can do with stock twins anyway.
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Originally Posted by spaceman_spiff
(Post 7991337)
I've never heard of this, I always thought that the PFC or Haltech was the only way to go as a full-replacement over the stock ECU. These are stock ecu's for sale? And you can just plug these in and safely turn up the boost?
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If you have a wideband to monitor the AFRs I think you should be fine, increase the boost until the ecu stops adding enough fuel to keep you from running lean, of course you have to watch the inj. duty cycles. not sure about the timing maps
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Originally Posted by ahad
(Post 7991739)
man ive heard thats too risky...i knw a guy selling an ecu like that here but he doesnt knw the specs...and from what ive haerd if u have the wrong ecu ur engines goin bye bye...
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Originally Posted by ahad
(Post 7990859)
and what if u need new twins neway? THEN what would you guys suggest?
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Originally Posted by rx7doorhandles
(Post 7902576)
dblboinger thats cool sticking with the twin turbo setup, also I agree finding what your looking for can take some time on this site
Here is my setup (my goal was to max out my twin turbo setup and keep it a street legal daily driver) - Have my Air pump still in my car - 3 inch downpipe, midpipe w/high flow cat(rx7 store), 3inch HKS cat back - Apexi PFC tuned by Dee Karagiannis - ACT heavy duty clutch, 9.5 lb Flywheel - Redline fluids - Efini Y pipe - Upgraded intercooler (in stock location) one off custom job with Tial BOV welded to it) - Aluminum Race Radiator - Hard Intercooler piping (RE Amemiya) - M2 Carbon Fiber Intake w/K&N filters - Hard pipes intake(rx7 store) - SS Clutch line - New Fuel Filter - Religous Oil changes - Boost gauge and CD player(my ice JK) I love how many people here are making these high horsepower #'s or fast 1/4 mile times and their clutch's are always slipping?:)? If the clutch's are slipping how are they putting down the power. Well there is always someone to one up you out there. I dont want to start fights here, I was just repeating what Dee Karagiannis said "320 whp with no porting and stock twins" and he has some serious credentials http://rotarynews.com/node/view/709 he tuned that 7.86 at 169.13 RX7...enough said:)!!! Good Luck with what ever you do dblboinger! You can always PM with any further questions friend of mine did 387rwhp on stock turbos, but he's got no cat and a big port, turbos were basically boosting as much as he could make em (17ish, dropping at high rpms) |
Originally Posted by XxMerlinxX
(Post 7992169)
There's nothing risky about it, people have been using them for years. If you don't have any idea what it's tuned for, as in the original shop's label is gone or the original owner never kept track, then no, I wouldn't use it. RE Amemiya ecu's have a sticker on the back that tells what the ecu is tuned for, and most of the people with the Pettit ecu's know exactly what it's tuned for.
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You know multiple people who ordered redom ecu's and blew their engines because of it? That seems pretty unlikely.
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Originally Posted by XxMerlinxX
(Post 7996811)
You know multiple people who ordered redom ecu's and blew their engines because of it? That seems pretty unlikely.
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