Just tuned a customer's car today and got some dyno #'s on our stage 2 turbo kit (not exactly). The only difference is the dp. Our kit coms with the 3.5" dp whereas his was a 3". Anyways, here're the dyno charts. All these #'s were done on race gas since we street tuned it before decided to goto the dyno. The a/f ratio was extremely rich (10.3:1) at 8psi, 14psi and 17psi due to higher specific gravity but i didn't want to lean it out since it was tuned for pump gas already.





http://www.gothamracing.com/pics/Ste...%20kit%202.jpg



http://www.gothamracing.com/pics/Ste...rbo%20kit1.jpg

that turbo looks like it has a very very nice smooth power band....... what turbo would you guys say this is comparable to?

It's a standard T-series turbo (non-ball bearing). I designed the manifold to peak torque at 6500rpm. I was suprised that the calculations actually matches real #'s.

T 66?

Nice numbers and curve. Congrats. https://www.nopistons.com/forums/pub...IR#>/smile.png

what kind of ports is that car using?

the car has a stage 2 street port from us. The customer is on its way back to memphis, I'll tell him to post on what he thinks of our turbo kit later.

https://www.nopistons.com/forums/pub...#>/biggrin.png yes those are very nice #s and a very smooth band I like.

Nice, Steve. How much more you think you could have squeezed out running closer to 11AFR for the race gas? How effective do you think that turbo would be at even higher boost? Got a compressor map? Got milk? https://www.nopistons.com/forums/pub...IR#>/smile.png



Tony

I was pretty happy that the car made 474rwhp at 19.5psi of boost. We stopped because we were seeing 97% duty cycle on 550cc pri and 1600cc sec. I think the fuel pump is maxed out.

I think it could make 500rwhp but the restriction will be the dp since I estimated that the 3" dp is only good for around 500rwhp. The only way to gain more is to put a 3.5" exhaust system. 550-600rwhp is durable with a larger turbo. Honestly, the turbo has to size properly for the supported power but manifold is the key in making good hp as well. I made try to put a plain GT4082 turbo in our manifold and see what dyno #'s we can get out of it.

Very nice dyno. Looks good, keep it up.

good ****. looks smooth. https://www.nopistons.com/forums/pub...#>/biggrin.png

Got any pics of the manifold or can you describe what makes it unique without exposing "sensitive" design data? Equal length, short runner, capacity for a flanged wastegate (ala recent Ecotec race built motor/turbo combos), etc? Thanks Steve.



Edit: Gee, you could have made over 17% more RWHP if you would have put it on a Mustang Dyno and used the locally established correction factors. https://www.nopistons.com/forums/pub...IR#>/wacko.png

Looks nice Steve. Good numbers.

we only made 2 manifold for the stage 2. One for this customer and the other is in my red car. My red car has the thumper T88 in it. I guess I can take pics of it in the car?? As far as the design goes, it uses dual tial 38mm wastegate vent to atmosphere and individual runners going into a divided turbine housing. The turbo isn't any special. It's a standard off the shelf T66 that we put in for testing. I have a turbo that I plan to use which should spool a little faster but we couldn't get it in time for his car. Other than that, I think that's about it.

Similar to this except his is set up for twin wastegates. This one is for sale.

How much are these kits?

17% more?? Who's dyno is that? That's sounds way too much to be right, if I use the #'s I made and add 17%, that equates to around 550rwhp.... https://www.nopistons.com/forums/pub...DIR#>/ohmy.png





Also, on a side note, you can estimate how much boost the person is running based on the torque it generates. If someone posted a dyno sheet that makes 400rwtq and says they're only running 14psi, you can tell right away that they're lying since it takes approximately 22psi to make 400rwtq.



8-10psi is generally around 250-270rwtq

12psi is generally around 290rwtq

15psi is generally around 320rwtq

17psi is generally around 330-350rwtq

20psi is generally around 370-380rwtq

You plan on selling these with the wastegates venting open air?



SHE IS GONNA BE LOUD https://www.nopistons.com/forums/pub...#>/biggrin.png

routing back to the dp is an option ($150) I think and requires to be a single 44mm wastegate instead of dual wastegate setup. I personally like venting to atmosphere because it sounds good and also prevents turbulance going back into the exhaust system causing back pressure at higher boost.

It is equal length.

man, i love it. i raced a guy on a cbr600f4 and walked away from him. the manifold helps spool so much quicker than my last setup with the terd OBX manifold. the turbo i'm running has polished comp housing, wet center cartridge and and 1.00 divided turbine housing. can be seen here:

http://store.yahoo.com/cheapturbo/garrettto4r.html

and i found out about it here:

http://www.rx7club.com/showthread.ph...hreadid=256546

Roy loves quick spooling too.

Nice numbers guys. Very smooth powerband too.



Steve, you planning on making more of those manifolds to sell to the rest of the 7 community??



Zach

A newcomer to a late thread....so is the kit even available yet? I saw only the stage one on the website so far.



Interesting manifold setup. I can't imagine 2 wastegates venting to atmo....wow!



Interesting setup, any more developments?

Kit is available. Should be more dyno numbers this week. When I fabricated the dump tubes I brought them down as low as possible and pointed them at the ground to minimize noise.

Looking forward to seeing more numbers. Any pics of the setup in the car? Hard to visualize how that sits in there.



What will be the big difference between stage 1 and stage 2 kit?



TIA

How much?

check out the website

Any new developments or dyno numbers?

I'm lost https://www.nopistons.com/forums/pub...IR#>/wacko.png which website?? https://www.nopistons.com/forums/pub...1047683561.gif

I love the manifold you guys made. Nice looking stuff. https://www.nopistons.com/forums/pub...IR#>/blush.png

UHhh?



http://www.gothamracing.com/catalog/produc...products_id=851