Unbelievable gain from an exhaust manifold change

[killercolt]

After helping my friend tune his car, I told my friend that his car is kinda laggy. He said he believe the FP manifold is causing the lag. I screamed at him "hell no!" I told him the FP manifold is pretty proven to spool a turbo nicely. He said he will prove it to me. Two days later he got his hands on a twin scroll t4 DNP manifold. He made an adapter to mate the T4 DNP twin scroll manifold to his single scroll GT35R with a t3 turbine housing. He drove the car and called me to say that the afr is really lean now. I thought he was just bsing me. When he came by my house the afr was in deed pretty lean. I increased the fuel up 20% and told him to wait until we go to the dyno to check it out.

You can follow this link to check out what the car got before the switch to the DNP manifold.
http://www.dsmtuners.com/forums/dyno-talk/460924-cyclone-vs-honda-intake-manifold.html


He only changed the turbo manifold for this Dyno session.
I only cleaned up the afr a bit to make full pull. Up top, the 2g mas is maxed out at over 3000hz so afr is kinda funky. I am not familar with mas clamp so we just stop. The result is pretty unbelievable. I did not expect it to do so good.

Lower power level is with the FP manifold with the mitsu to t3 adapter. Higher number is with the DNP manifold with the t4 to t3 adapter. Just to make sure it is clear, I want to say that the turbo is a GT35R with a single t3 turbine housing. Please don't ask me why he is using a twin t4 manifold with a single scroll t3 turbine housing. It is what my friend wanted to do. We all know it is not ideal. I just show up to see it make power and it did. Sorry for the long wind so here are the results.

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[nitrouskris]

Hmmm

 

[xxNocturnalxx]

Don't have much to say about that except damn nice

Unless there was an exhaust leak before which may explain lag and offset afrs..

 

[killercolt]

Boost was 22psi. The turbo just boost faster with the new turbo manifold. I believe it has something to do with the exhaust seperation before it his the turbine. I actually got a brand new FP turbo manifold for my new setup but is feeling kinda iffy about using it now. Mike from FP might hate me for posting this but I am not out to hate on FP manifold. I just like to share result and admit that my friend was right. DNP is out of business now according to Extremepsi. FP manifold is a great manifold still. I already proven that FP manifold made 12 hp more over stock on sedsm.org.

 

[xxNocturnalxx]

I see, well nice gains, especially for such low boost on that turbo.

 

[killercolt]

He did not have an exhaust leak before which is why it is so shocking to see the different.

I also want to mention that that we did try to turn the boost up a few times just to see if it has anything left for future Dyno session. I only rev it to 6000rpm. At 25psi, the car made around 500tq+ and 570hp+. My friend want me to make a full pull with the MAS maxed out(crazy but that is what he is) but the clutch could not take another 500tq pull. It smoked the clutch at 5000rpm when it hit full torque. Act 2600 with a 6 pucks is no match for 4g torque production. On the street this car is so violent. It pinned me against the seat as soon he punched it 3rd at 3500rpm. We are going to the 1/8 mile this Sunday. I hope he can get some high 6s or low 7s.

 

[ceedawg]

This particular car has the cyclone mani on it as well,just want to clarify? Because man,those are great #'s for 25psi boost. I can hardly wait to get my car together!

 

[1990AWD]

Good numbers but its probably not so much that the FP manifold is of a lesser design or anything, but the fact a GT35 flows enough to warrant a bigger manifold. Plus going from a single scroll to a massive twin scroll is one big difference.

 

[11secDSM]

So basically your results show the that a manifold with a smaller flange chokes a turbo designed for a bigger manifold. Nothing unexpected here.

This adapter flange shows how bad a Mitsu flange chokes a t3 inlet. Far from optimal.

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[rr06rs]

I agree with both of the responses above and ALSO feel that there MAY have been a leak that went undetected. At the same time, I have to play devils advocate here. Devin Shultz went 8's @ over 160mph with an adapter JUST LIKE the one pictured FP mani and a 35r with a t3 .82 housing......once he switched to Punishment tubular mani, he DID pick up power, but mainly because he switched to a 67mm turbo. The gains were pretty much inline with what one would expect to pick up from the 5mm increase in compressor and increase in turbine.

 

[phunny]

It's funny how we're comparing apples to oranges and are shocked they taste different. I know my setup will e chokes with a dsm housing but its the setup I want for now. I would be shocked if I won't to a t3 and it didn't make a ton more power.

Nice numbers, I'm sure it's a fun DD.

 

[leathaleagle21]

he is running the honda intake now i believe he tossed the cyclone in the trash. oh well

 

[DSMReviver]

Im not suprised. Going from a short cast to long tube manifold will yield in an increase in horsepower. Because of several reason, one reason is that it simply spread the exhaust gas further out from the chambers preventing it from going back into it. other reasons like exhaust velocity is gained from the long tube manifolds. Im sure there are more better explanations out there. But, cast offer durability when it's cast from a good material.

Kelton switch from ERL cast manifold to obx ramhorn() and gain like 30-40hp too.

 

[phunny]

I really like the obx longhorn

 

[Lou98GSX]

i think its because of the exhaust gases firing directly down into the turbo . the fp manifold the gases kind of collied into each other .

 

[CrackedDSM]

It's funny how we're comparing apples to oranges and are shocked they taste different. I know my setup will e chokes with a dsm housing but its the setup I want for now. I would be shocked if I won't to a t3 and it didn't make a ton more power.

Nice numbers, I'm sure it's a fun DD.

It's from the same person that dynoed a Cyclone that wasn't properly actuated at all, and said the Honda IM made more torque. What do you expect?

 

[donniekak]

Im not suprised. Going from a short cast to long tube manifold will yield in an increase in horsepower. Because of several reason, one reason is that it simply spread the exhaust gas further out from the chambers preventing it from going back into it. other reasons like exhaust velocity is gained from the long tube manifolds. Im sure there are more better explanations out there. But, cast offer durability when it's cast from a good material.

Kelton switch from ERL cast manifold to obx ramhorn() and gain like 30-40hp too.

I'm not surprised that it made more power, I'm surprised it spooled quicker.

 

[ricktb]

now put a stock mani on there and post the result, I know my fp manifold increased spool over the stocker for sure! Is it the best maybe not, but for my 16G im happy for now, not exactly trying to squeeze out tiny gains with porting just yet.

 

[DSMReviver]

I'm not surprised that it made more power, I'm surprised it spooled quicker.

The gain in exhaust velocity will help it spool faster too

 

[killercolt]

In terms of price, reliability, fitment, performance, and accessibility to one, you can not beat a FP manifold. If you are looking to explore "possible" gain with a divided t3 or t4 manifold, it looks like there is hope from this Dyno session. I got an FP manifold now. I might try it to see what it will so since it will be quick to set it up. Plus I am ready to hit the track again.

 

[PieEyedPiper]

I was always under the impression that the FP was never famous for it's spool.
Boy, I'll never forget the time the forums blew up over the release of that damned thing.

 

[bastarddsm]

Lol I remember that and when the 3065/3052 come out. Wowsers that's all there was goin on

 

[94awdcoupe]

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not every back to back proves anything. I would say there was something wrong with fp manifold setup prior. I have seen 30psi at 4100 rpm in thrid gear logs AEM. made 599whp at 34.5psi. FP manifold, T3 adapter, 35r.

 

[T is for TURBO]

It's funny how we're comparing apples to oranges and are shocked they taste different.

I concur. "Unbelievable" is probably the wrong word to be using. "Impressive" would be a better choice

 

[ceedawg]

In terms of price, reliability, fitment, performance, and accessibility to one, you can not beat a FP manifold. If you are looking to explore "possible" gain with a divided t3 or t4 manifold, it looks like there is hope from this Dyno session. I got an FP manifold now. I might try it to see what it will so since it will be quick to set it up. Plus I am ready to hit the track again.

Hey killercolt,
Looks like 94awdcoupe made some pretty nice #'s with that funky lil inake manny and of course the fp manifold. Look where he says he was sppolin and the horsepower to boot!