Here's my graph comparing my old exhaust setup consisting of a DC JDM 4-1 header, Carsound cat, and Comptech exhaust vs. the HyTech header-cat-exhaust system.

Before tuning, the HyTech system had 5-10whp over the DC/Comptech system throughout the entire powerband. Good stuff.

After tuning we pulled a nice fat midrange and were able to gain 31whp over the old setup, 21.3whp gain over the HyTech itself without tuning

Peak numbers after tuning were 186.5/130.3. Before tuning the HyTech system put out 178.8/125.8

Mods are just Comptech Icebox and HyTech exhaust system. Tuning done with cam gears, VAFC, and FPR.

 

 

wow, that's some great gains

 

wow. insane. nice set up and great numbers.

 

Whoa here!

Are you telling me that you gained more than 35+ whp from stock just with the hytech exhaust. This seems crazy to me. I don't think running an open header would even give you that much. Am I missing something here?

 

It's all about the tuning. Phat #'s SurferX

 

Great numbers!

 

This wasn't a comparison of just catbacks, this compared two entirely different exhaust systems.


[Modified by SurferX, 1:06 AM 10/18/2002]

 

wow...give me some money for a hytech exhaust

By the way...awesome numbers!

 

the vtec point was change to 5k for that fat midrange?

 

WOAH

 

Josh,

On the green (hp) and black (torque) curves for run 01, were you using cam gears, VAFC, FPR and stock VTEC?

Nice numbers

 

I hate seeing dyno graphs like this, makes me wanna sell me current setup for another one

 

exactly.
i need more money.


[Modified by disordeR, 6:39 PM 10/16/2002]

 

For run 1, the tuning mods hadn't been touched, it was just Comptech Icebox (on stock rubber intake hose) and HyTech exhaust system. Here's the raw dyno without my old dyno covering stuff up.





[Modified by SurferX, 6:49 PM 10/16/2002]

 

Awesome numbers!

I take it that you don't have any sort of catalytic converter, right?

 

DAMN I know what header exhaust setup im going to be running.

 

I do have a cat, HyTech's modified Renault that is included with the full exhaust systems. Emissions tested low enough for CARB approval.

 

I think HyTech is using a Renault one now...I'm sure I'll be corrected if that's wrong

 

Ehh...he beat me to it

***EDIT***

Those are awesome gains by the way. It looks like I need to save up some cash.


[Modified by cheezthis, 9:06 PM 10/16/2002]

 

This is insane. I'm truly shocked by these awsome numbers. Up until this point my setup was going to be comptech icebox, jdm 4-1, carsound cat and comptech exhaust. I'm debating if I should switch but HyTech stuff is very pricey....but worth it I guess.

 

WOW! Where did you get it tuned at?

 

Don't do it man haha. The Comptech exhaust is 2.25" OD so it's basically the same as stock. Not much gain to be had with it obviously.

 

hum... these results are completly differnt from the Great Header Test... the JDM DC did much better than the one plotted here...

 

Tuning?