ET gains from LT header install
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Teching In
Joined: Feb 2006
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ET gains from LT header install How much time will can be lowered from a LT Header install. I was reading on another site, and they were saying .3-.4 gains in et. I find this hard to believe. I just wanna now what you guys think.
I don't know if this is typical or not but I went from 7.81 @ 87 to 7.53 @ 90 with no other changes when I installed the Hooker LT's on my car. This was untuned for the headers. After tuning I picked up another .05 and almost a MPH but in all fairness to the tune, the tranny took a dump at the track the first time after the tune so I didn't get to make a good pass to accurately compare.
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longtubes will gain about 20 hp or .2 tenths, the stock exhaust with a cutout actually flows pretty well, that is why i haven't got any yet, they are really only worth it if you have a cam...talk to 11secss he has done some valid back to back testing on it, with similar da's
11 Second Club
Joined: Oct 2005
Posts: 1,847
Likes: 1
From: Sandwich, IL
Originally Posted by 99_hugger_Z
How much time will can be lowered from a LT Header install. I was reading on another site, and they were saying .3-.4 gains in et. I find this hard to believe. I just wanna now what you guys think.
I only gained about 1.5 tenths going from manifolds to mac headers, I finally just recieved my kooks and off road ypipe so I'll post new numbers but with the heat now it will be hard to tell how much if any.
I haven't gain anything untuned with my 2000 SS. I know it is running real rich with a worse 60' but the same 1/4 mile time with a 1mph gain. Better times soon as it is getting tuned next week...........