stepped header gains over non stepped
stepped header gains over non stepped What do you guy think the gains would be from going from a regular 1.3/4 regular header to a stepped 1.3/4 to 1.7/8 with a merge collector would be.
Do you think it would depend on the cam in question. ect.. discuss.
Do you think it would depend on the cam in question. ect.. discuss.
from what I have seen on this board and LS2 boards.. the 1 7/8 is really only needed for high hp applications.. and using the 1 7/8 header on smaller displacement, actually will hinder performance.. from your sig.. it looks to me like you are at the cross roads or just on the verge of needing them.. I would call up Kooks or even LGmotorsports and speak with them about what you have currently and look to gain by making that jump..
There was a member on here that had pretty stout track gains going to a stepped header with a trex cam. He converted all the numbers down so that track weather did not play a factor If I can find it again Ill post what he said.
Here it is
Quote:
Originally Posted by BAINI do not agree that stock cubed motors will not benifit from larger headers than 1 3/4".
On my stock 346 w/T-rex and stock 241 heads my car picked up a good amount from Hooker 1 3/4 LT's 3" X-pipe duals w/4x9 3" Magnaflows dumped at the axles changing to Edelbrock 1 3/4 - 1 7/8 slip on colectors and 4x9 3" Magnaflows off the header. I haven't put it on the dyno to see the power difference, but it's deffinately there according to the track times. There are no other changes other than the exhaust in the following times and I have corrected them to 0 DA to factor out the weather....
5/12/06 +728 DA
60'___1.53
1/8___7.054@96.98
Corrected to 0 DA = 7.0@97.72mph
6/16/06 +3358 DA
60'____1.52
1/6____7.085@97.68
Corrected to 0 DA = 6.8@101.63mph
So for me there was a differnce of 2 tenths and 3.9 mph!!!!!!
Quote:
Originally Posted by BAINI do not agree that stock cubed motors will not benifit from larger headers than 1 3/4".
On my stock 346 w/T-rex and stock 241 heads my car picked up a good amount from Hooker 1 3/4 LT's 3" X-pipe duals w/4x9 3" Magnaflows dumped at the axles changing to Edelbrock 1 3/4 - 1 7/8 slip on colectors and 4x9 3" Magnaflows off the header. I haven't put it on the dyno to see the power difference, but it's deffinately there according to the track times. There are no other changes other than the exhaust in the following times and I have corrected them to 0 DA to factor out the weather....
5/12/06 +728 DA
60'___1.53
1/8___7.054@96.98
Corrected to 0 DA = 7.0@97.72mph
6/16/06 +3358 DA
60'____1.52
1/6____7.085@97.68
Corrected to 0 DA = 6.8@101.63mph
So for me there was a differnce of 2 tenths and 3.9 mph!!!!!!
