T4 Setup on a Galant VR4

[Reese92tsi]

Unless the turbine housing is the bottle neck for more power, Where it make a different when you running bigger hot side with pump gas and smaller hotside with racing gas?

On pump gas you're limited to lower pressure ratios due to the low detonation resistance of the fuel. With a bigger hotside pumping losses are minimal and airflow at lower boost levels will be much higher thus making more power on pump fuel.

 

[SpoOLxExO]

What else have you done to lighten your Galant besides what you listed?

Besides No stereo (Speakers or headunit or any wires) and some small interior lights, nothing.

Although removing the AWS is huge as far as weigh shedded 80+lbs with the rack and all the lines.

Even moreso, when this turbo gets tuned to where it wants to be, I'll be adding weight right back in with a 10-pt Cage.

 

[dsm-onster]

On pump gas you're limited to lower pressure ratios due to the low detonation resistance of the fuel. With a bigger hotside pumping losses are minimal and airflow at lower boost levels will be much higher thus making more power on pump fuel.

Yes. Even though you are slowing spool, you are increasing the overall volumetric efficiency of the system. Upgrading cams also increase VE. Thus, a set of hot cams can give you great gains.

 

[GVR4592]

Besides No stereo (Speakers or headunit or any wires) and some small interior lights, nothing.

Although removing the AWS is huge as far as weigh shedded 80+lbs with the rack and all the lines.

Even moreso, when this turbo gets tuned to where it wants to be, I'll be adding weight right back in with a 10-pt Cage.

Sorry to burst your bubble but the AWS isn't even close to 80 lbs. I took mine out last week and the rack, lines, and rear pump are less than 35 lbs.

 

[SpoOLxExO]

You didn't burst my bubble.

When the rear was removed I got 80 lbs off my car by doing other weight reduction methods at the same time.

I should have clarified that.

 

[nanokpsi]

Unless the turbine housing is the bottle neck for more power, Where it make a different when you running bigger hot side with pump gas and smaller hotside with racing gas?

I already know racing gas is more resistant to knocking..... so you can running higher ignition for more power.

A bigger hotside increses VE similar to cams or a SMIM. It's not just about keeping the intake-to-exhaust pressure ratio in check. That means the engine will flow more air through it at any given boost pressure which is important on pump gas where you are octane limited.