i run my JWT popcharger with no heatshield and not connected to the long black thing that acts as a guide for air through the grill and it most def pulls harder. and i can assure that i have hotter weather than most of u on this forum.lol. every said no heatsheild id lose power but it doesnt seem so.

 

I tested the effect of hot to cold air ingestion on the dyno and it made a big difference.

Using a trash can full of ice cubes and a nework of dryer ducting I was able to supply the intake with cold air at about 45' F. By mixing the cold air and with hot air from behind the radiator I was able to vary the mixture to vary the air temperature from ~ 50'F to 120'F.

I tested from lowest to highest in 10' F increments to see the effect on the power curve. And it really made a big difference. 10-15 HP across most of the curve.


Also note, at low temperatures the car ran leaner than normal and at high temperatures it began to run rich.

 

2005 and up - Rev-up

 

i'm thinking about putting MOTORDYNE ISO THERMAL 5/16 PLENUM SPACER KIT into my G35 Coupe 5AT.. should I also put my stock intake back? I have a Stillen w/ Z Tube

and also i've heard its waste of money if I put MREV2 on??

 

how old is your stillen and z tube miles... if u switch back out how much would u take for it wat all do u have still??

 

No, not at all. The Stillen well works well with the MREV2.
Keep your Stillen.

 

I see! Now, let's say I get rid of my CAI and get a Z-tube with a K&N filter. Although I was losing about 3+HP as you have mentioned, will I be able to tell the difference in gains with the Z-tube once I start driving the car? Is it that noticeable where people can really say "My car does feel faster!".
I'm EXTREMELY happy with the MREV2 + Spacer. But if you tell me that they will work much better if I get rid of my CAI, then I probably will get a Z-tube and K&N filter. Thank you in advance.

 

You know what.... I've never dynod a K&N intake.

I say take it to Performance Factory and get a baseline dyno. Remove the long tube CAI and dyno it again without removing the car from the dyno.

Then post you results here.

A lot of people would like to see your results.