Don't highflow cats also get rid of backpressure?

 

yes, but not as much as open pipes.

 

Are you saying the new cam reduce your low end torque?
I am trying to obtain more low end torque. As a newbie to import the lack of off the line torque has been my ONLY disappointment.
What can I do to improve off the line torque? I have a 2003 G35, auto, with performance wheel and tire package, which gives me the limited slip rearend.
With my corvettes we could add a lower gear rear end or beef up the torque convertor.

 

Aren't you getting the most torque for a NA? That says a lot about the Nissan ECU and the Crawford headers.

 

I'm assuming although he has more net torque , his stock dyno curve would have higher torque at lower rpms. I wish he had a stock dyno, then we could overlay the two curves...

 

 

There will be a different final drive available sometime in March which will get the rpms up faster and require faster shifts, but should definately help off the line. My understanding is that the autos will require more than just the new final drive, possibly a new LSD as well. A torque converter is again a possibility as well as a valve body recalibration for the autos. 350trackz can still add pulleys to help raise the HP and TQ curves a bit across the board. Not really sure how much an ECU flash would do at this point except lifting the rev limiter and removing the speed limiter. I am really excited to still see the A/F ratio where it is at with the stock ECU. I was almost decided on some suspension mods but now I think some cams may be on the horizon.

 

Torque peaks at about 3750.

If you look at the following thread, you will notice his base torque is fairly flat. Then look at mine and you will notice I have a BIG dip at 2750.

https://my350z.com/forum/showthread....=baseline+dyno

 

How much should i expect to pay for the instalation of the Crawford Headers?

 

$300ish or so. It takes the better part of a day for someone who knows what they are doing.

 

Did the cams require new shims?

 

nope.

 

350trackz what do you think of the Tomei 264 cams?

 

Those were my next choice. The JWTs have more lift and a better reputation in my book. The 264s MAY require shims. Of the shops I talked to, half did need shims, half didn't.