I'am new so be polite, I have looked around and can't seem to find a answer ..
What seems to be the most we can get of our twin turbos, I mean with what ever needs to be changed, be it the exhaust, intake, ignition, whatever... So with that in mind , Does anyone know what 's the most WHP I can possible hope for if I do eveything right with the twin turbos... Thanks..

 

I don't know what the max is but I just dyno'ed yestarday and I made 327 on the stock twins which was all I could do due to boost. I was only able to make about 12.5 psi or so (I think) here in Denver, Co. Elevation 5300'. When I lived in Phoenix, I was able to make more boost.

 

I don't know exactly how much either, but I've heard of poeple breaking 400whp. Thats with 15 or 16 lbs of boost though...and a ported motor. With a stock motor i think its around 360ish.

 

I think a couple of people have pushed those numbers but only to see what could be done. It's not what I would call a 'tuned' setup. Your intake temps go way up, and the turbos themselves get stupidly hot.

If you want to hit numbers over 350 on twins, get BNRs.

Dave

 

What does BNR stand for. I keep seeing it on the forum but never asked.

 

http://www.rx7store.net/product_p/bn...e%203%20fd.htm

they have them. but its funny how they want your core for almost everything engine related.

 

15 psi is reliable and u could expect 340-370rwhp depending on your tune and wether or not u have a port. people do get 400 but thats with sacrificing reliability. that should answer ur question.

 

I plan on maxing out the stock set up in my FD. I'm hoping for 400WHP, I've been told it going to be hard with stock twins and SMIC. BNR are a beefed up version of the stock twins that have a great rep for low 400WHP. Talk to the guys at Gotham racing they gave me a lot of info. I was going to get them but decided it would be more of a challenge with 99spec and I wouldn't have to cut my Y-pipe. MY last dyno run was 338WHP and I've add HKS twin power and light weight flywheel since, after some tuning I'm hoping for around 350WHP.

 

This might help: https://www.rx7club.com/3rd-generation-specific-1993-2002-16/finally-10s-stock-twins-non-seq-246989/

 

i dyno'd at 324rwhp. that was on a mustang dyno. on a dynojet it would have been around 350ish. so it depends what dyno you are on. i did that at 14.5 psi (spiking) and dropping to like 13. i started to run out of fuel pressure though.

3" turbo back exhaust
aem ems
99 twins
hks intakes
koyo rad
greddy 2 row fmic
additional injector system
stock ports
act clutch

 

Bryan Nickel Rotary. Great guy, very honest and knows his stuff !

http://www.bnrturbos.com/3rdGen.htm

Btw, if you click the dyno link in my sig you'll see a 421 rwhp run on twins.

 

Thanks Guys. Great info... I think i'll call Gotham thurs. .. How does everyone feel about the 99specs twins versus BNR's, Can buy either at about the same price...
But I like the idea of keeping twins versus going single... I know single would produce more power, But would like to keep it as close to original... Rich

 

I'm running 99 twins. At 15 PSI with a street ported motor and all the supporting fuel and flow mods, I dyno'ed ~350 RWHP. If you want longevity out of twins, I probably wouldn't recommend constant running at 15 PSI. I usually run at 10 PSI which is less than what they run from the factory at 12 PSI.

The car is fast enough at 10 PSI to get me in trouble on the street.

You can probably make more power more reliably using BNRs - especially with one of Gotham's awesome port jobs. Rynberg made good power on BNRs using a small street ported motor and running them sequentially.

 

Rich is running BNR Stage 3's not a single. that video is nuts. i like how it just jumps to max power halfway thru the pwoer band and stays rock steady all the way across.

I didn't think the 99 specs ran any more boost than the regular's did. I just thought the power increase came from primarily the Efini Y-pipe and the better efficiency of the tighter compressor housing clearances. I may be wrong though.

 

Actually, Rich (Goodfella) is now running a 500R single turbo now making mo' power than he did with the BNRs. He was running the BNRs setup non-seq for many years before that.

I prefer running sequential and have quicker response and more low end power with a nice broad usable power.

 

yea i miss sequential

 

yeah if u arwe gonna keep twins why u would run them parrallel is confusing to me. mine as well just go single. the ebenefit of twins is quick spool and low end grunt i think running them parrallel greatly reduces that benefit.

for the original poster. i would go bnrs way before going 99s in my opinion. **** i would go used set of stock twins for dirt cheap over the 99s.

 

This subject has been beaten to death many times, if you search you'll find lots of good info

I agree with what Matty says above, and if you want to stay close to original, pick up the BNR Stage 3 in sequential form, you can get them direct from BNR.

 

maybe i'll under my non-seq conversion...time to scrounge up all the old solenoids. I bet it would be easier to sell if it was sequential too...

 

In stock form, about 368rwhp is the upper limit in reliable form. Above that, the stock turbos are dying, and the temps are indeed skyrocketing like Dave said. You can destroy the turbos in fact at those boost levels (18+).

On ANY set of twins (ie upgraded), I think Rich (GoodfellaFD3S) actually holds the record to date: 421rwhp on the Stage III BNRs in parallel. And I bet ya if the manifold was redesigned, he can squeeze a bit more outta 'em too

~Ramy

 

i would rather know who holds the documented record for stock twins (not bnr's, not 99 spec twins). but for just stock twins.

 

RX794 already posted the link. Check it out. John (JD) in NJ. 402 rwh-356rwt -dynoed.

~Ramy

 

It baffles me why there's no market for a SS OEM replacement manifold.

 

that's news to me. Can anyone else confirm? that the 99 and up Rx-7
run at 12 psi.