i just recently went from an HKS HiPower canister w/ 3" piping and resonator to GReddy Ti-C dual 70mm to dual 60mm

i havent retuned it yet because im still going to install a 2mm gasket and 3.0" pulley but i did notice a very nice low/mid gains. the car is much more responsive now

 

Sweet man !!

Im 100% positive that u will get even more mid-range torque and hp once tuned !!
Good luck and let us know how the tune went.

 

very interesting.


Some data from my own personal experiences.
Dyno numbers would not be valid since there was a clutch change between the AP2 Mugen and the modified OEM cat back I have.

But the changes in boost numbers support your theories.
Since like a CT/VT the Roots puts out a set amount of CFM so boost is a product of restriction down stream of the blower all the way to the tips of the muffler.


[QUOTE]2.2
Internals unchanged.
Does not burn oil and catch can does not show indications of blowby
126mm crank
Upgraded Moss manifold
600hp PWR intercooler 3" inlet/outlet


On
Mugen 2.2 header
Stock OD TP
Mugen AP2 cat back

in 78 deg ambient conditions
Greddy pressure 5.5-6psi average
OEM sensor was seeing as hi as 7.0 and even saw a 8.1psi in the data logs.

In 50 deg ambient condition
Greddy pressure 6.0-6.5psi average
OEM sensor was seeing 8psi average and even saw a 10psi spike



On
Mugen 2.2 header
Stock OD TP
Stock cat back from TP to split with OEM OD piping before and after split
with a dual muffler setup of Race Series dynomax

 

^^ very interesting indeed !!!
Thanks for your input

 

Bumping this because I was looking for it and I'm sure others were also!

 

so that was an ap1, i will get my sc 12 psi ap2 tune with 70mm single, and i will post the dyno sheet and see what's the different. keep this update plzzz..

 

you cant see whats different if your not swapping exhausts like the OP and your not even on the same dyno...


My date with Evans is the day after yours Leo...
If you dont mind am gonna ask evans to overlay your 12psi vortech sci dyno with my 12psi Rotrex dyno I fore see another heated thread coming up

 

i feel like there is some data missing....doesn't make sense that 3in makes more than 70mm, but 63mm makes more than 3 inch.

 

hey you know what we are missing the boost plots.very important info

 

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