Do you think any improvement can be made from the Mazzuri headers? I'd be interested to see if PPE can find a reliable solution to the CEL.

 

Man i notice a lot of company that needs protypes are out of state. Only if something like this would come up in Cali, i'll give up my car for a couple of weeks Cant wait for the results tho

 

Headers = FAIL...lol

 

Given Mazzuris headers dynoed a gain of roughly 0 horsepower on a 350 it'd be pretty hard NOT to improve on them :P

 

LOL - well, I think there were some torque gains. My concern is that there aren't any real gains that can be realized with aftermarket headers for the 350.

I would love to be proven wrong, of course.

 

It was theorized there might have been some torque gains, at an rpm lower than a dyno could accurately measure on the IS350 automatic.

That may or may not have been true, but we never got any further data... (something like controlled conditions 1/4 mile runs might have shown if there were any actual gains if a dyno was unable to do so)


I'm with you though, based on the barely measurable gains from most intakes and exhaust and the non-results we got from the mazzuri prototypes, I'll be surprised if there's really that much there to free up with headers.

 

I should try that setup

 

Im in AZ Ill blast them a email tomorrow and see if they are still looking for proto car. Im not sure if I can be without my ride for very long but Ill see if they respond.

 

I'm not going to get very involved in this, but the 2GR-4GR motor design does not allow for the scavaging effect to happen. This is why we didn't see any gains the last go-around. Only one piston is firing into the exhaust header at a time. Most other motors have two. Large short runners with high flow cats will produce the most gains! The shorter the header is; the more gains we'll see. Sort of... Just remember CFM in should be > then CFM out. Otherwise the motor will have no back pressure. That doesn't work on N/A motor designs.

KMRIS350-let me know when your ready to sell that S/C

 

OMG where have you been dude!? I haven't seen you on the forums in forever LOL

 

any new updates on this???

 

No back pressure? And an engine needs back pressure? Surely you jest. Actually your large diameter short runners create a LOT of back pressure. But read the link. It talks about all of it.