how can anyone say that the ve of the engine has nothing to do with the turbo?

what scorke says is right... the later your torque peak comes on the later it will fall off.

the later you spool hte later your torque peak comes.

your torque peak is indicative of when you reached peak ve.

you'll never find a turbo that reaches peak ve at some stupid low rpm and then holds it there to redline unless you have a LOT of variable geometry doodads at work.

why do stock turbos particularly 9.8 housings make such high torque number nad at such low rpms? because their fluid velocities are high due to tight small geometry and hence they reach peak ve quickly and thus produce peak torque quickly... and then it falls flat on it's face.

why do gt35rs run all the way to 10k on a 2 liter motor?

becuase they reach peak ve at such a late rpm becuase only at a late rpm do they develop enough fluid velocity to high peak ve and hence develop peak torque.

nothing to do with the turbo? it has EVERYTHING to do with the turbo.

if you don't hit peak ve on the exhuast side you don't move the compressor side you don't realize peak ve in the motor. and all the other vice versa angles on such an illustration. come on.

 

trinydex I love your explaniations, you have a great way of taking complex things and breaking them down in a way even I can understand.

 

Cams and cam gears = evo 8 spool just same or faster, but I am still loving this turbo because I like the stock manifold option to put heatshield back on so when noobs look under the hood they say that is a stock T? ahahah. Hopefully FP comes out with the fp3052 for evo first though.

 

looks awesome

 

I believe that by porting that exhaust side you corrected a lot of issues. The .82 did spool nicely, about as fast as a .63 on a 2003-2005 Evo VIII. That MIVEC must really aid in spool.

Congrats.

 

I'm thinking about this kit.
Gruppe-s had them going for $2000 a while ago.
I wish they would run another special.

I'm planning on porting my extra stock manifold.

 

You would also need to port the .82 Housing to get a regular .63 flow rate on an AMS kit. He also has an Evo IX, so the lag on your 2005 would be more.

 

You can work the cams mated to a set of gears. The result may not be exact - but I bet you could get damn close on a VIII. The gears are just as important as cams.

 

It would be interesting to see someone perform something similar to what smokinjoe did in this picture... but with the stock manifold.

 

The Ability to vary the cam timing on the fly especially when you ramp it up while accelerateing REALLY decreases the Spoolup time. If you add cams and gears, you can advance it yeah you will have the same PEAK whp, but not the spoolup and consequently not the torque.

 

This was the dyno graph with MIVEC turned off.
Still no question that MIVEC is a great enhanchment when compared
to a non MIVEC Evo.

 

These are the Best ATP numbers I have seen.

 

this is where I am at now.... Do I port my stock mani and and atp gt3076 .82 hotside? or just do the t3 header and t3 hotside and re-tune. I made 350whp and 302 wtq at Buschers MD on 93 at a VERY conservitive 10.8 AFR, with only 3 pulls on the dyno....... maybe a more non brand specific tuner? (wont say names)

 

This is on the very first page of this thread.

SmokinJoe= STEP 1 - Porting
I ported the ATP turbine housing and did some minor porting to the Megan manifold (head side)





I was wondering how the results would be to port the stock manifold the same way as the hotside flange.

 

Yes those are some great numbers.


Here's the 28psi 100 Octance stock vs GT3076R overlay.

Notice the obvious gain in horsepower and torque.
The interesting part is shift in the torque curve.