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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
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.
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.
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
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
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.
Cant wait for the results tho
07-20-09, 10:36 AM
