Megasquirt XR4Ti **U/D w/ PICS and VIDEO**

[ScottyB]

Pete that is killer. great power curve there. hope you get to reap all the enjoyment for a while considering what you put into the car in time and sweat.

[Dave]

hawt!!!!

[Ginger]

hawt!!!!

Plus A LOT - congrats, Pete! That's excellent!

[WRXtranceformed]

Nice man that is a great looking curve, I bet it's soo much more smooth to drive! Enjoy it and hopefully you won't have any issues come up before you race it!

[balactm]

hey pete...have you considered running itb's? velocity stack's inside an aribox so you could still run the turbo? might give you some more horsepower...i guess the only concern would be the power to cost ratio. would sound really sick though.

[PDenbigh]

Thanks for the suggestion, but I'm not sure what you mean by ITB's honestly...

If I ever want more HP, though, the cheap fix is turning up the boost. Right now it is at 13PSI - stock on that car is 15 and I could easily take it to 20 with the current setup for 350-400 at the wheels...

But, I want to drive it at the power level required for GTS-3 and I want to become a better driver before I add more HP. When I'm running with the top 10% of GTS-3, then I'll have some fun and turn it up when I'm not required to be at a certain HP level.

[Dave]

ITB = individual throttle body

I would think it would be prohibitively expensive for marginal gains in his case. If my thinking is correct, it would require a complex, custom-made intake plenum, with each runner having its own butterfly connected to a cable linkage. The benefit would prob be a very slight increase in throttle response, but otherwise, not going to see a whole lot more.

Considering he's running pretty conservative numbers compared to what the engine could support, i dont think all the work for ITBs would be a quantifiable option.


Now... if there wasn't a big snail involved, it might be a whole different story...

[.RJ]

Yeah, ITB's and pimpy equal length runner manifolds are nice but when you have a snail its much less significant - turning up the happy knob a little is cheaper and more effective

[JustinG]

I could easily take it to 20....... I want to become a better driver before I add more HP

We all know what happened last time you played with the happy knob, and thats silly talk, everyone knows more power compensates for driving skill.

[D_Eclipse9916]

ITB = individual throttle body

I would think it would be prohibitively expensive for marginal gains in his case. If my thinking is correct, it would require a complex, custom-made intake plenum, with each runner having its own butterfly connected to a cable linkage. The benefit would prob be a very slight increase in throttle response, but otherwise, not going to see a whole lot more.

Considering he's running pretty conservative numbers compared to what the engine could support, i dont think all the work for ITBs would be a quantifiable option.


Now... if there wasn't a big snail involved, it might be a whole different story...

ITBs in a turbo setup is completely pointless. However most aftermarket intake manifolds for cars nowadays include velocity stacks for each runner with a tapered plenum.

ITBs also dont make much power, and 99% of the ITB setups ive seen actually have lost power(im not talking peak, im talking under the curve) because of the difficulty in tuning, most people do not have the know how, flow benches and engine management to properly calculate and tune the differences in VE, fuel injector variance, pressure differentials and intake temps.

ITBs are typically used to help throttle response and one of the last efforts in engine manufacturing to help motors make that last little bit without perhaps going with different cams/pistons/valves, etc.