justinp61
Well-Known Member
- Joined
- May 15, 2009
- Messages
- 3,146
- Reaction score
- 4,148
yes ...... those headers are 67 and up abody right ? not early abody
Correct, 67 and later.
yes ...... those headers are 67 and up abody right ? not early abody
My machinist tells me he built a Edelbrock headed 408 that made 579HP on the dyno with 10-1 comp a 252/260 solid cam with 1 3/4 pipes.
Edit: Should know soon what it actually makes when it runs shortly with the track opening again and competition starting again.
My W2 head 408 made made really close to 550HP with a single 4bbl and TTI 1 5/8-1 3/4 stepped headers.
I recently came across a set of the 1 7/8 TTI W2 headers second hand for a great price. I picked them up, but I'm now on the fence. I'm not certain the gains warrant the effort to swap. Fitment with the stepped headers is great, I hope I'm not inviting a headache if I go to the larger tubes. The collectors change from 3" to 3.5" with the larger headers.
The car is also changing from 3.23 gears to either 3.73 or 3.91 gears, now that I am installing a Gear Vendors, so perhaps the bigger headers will benefit from the gear change?
Thoughts and opinions welcomed.
Headers are in great shape, just needing a little TLC and cleanup.
@Newbomb Turk, the LSA is 106.
View attachment 1716244766
I'm glad to hear this, thanks very much!I recently swapped headers on my 418 stroker. Went from Doug’s 1 5/8 headers with 3 inch mufflers, to 1 3/4 to 1 7/8 step headers with same mufflers off of them.
The difference was dramatic, and at that point, that was the only change.
Based on the Et slips, difference was roughly 40 horsepower. About 10 more than what several people whose opinions I highly value suspectedI would see.
I was frankly surprised by the difference.
Think you would likely be happy with the swap.
Thanks for your response.With that much motor, and improved gearing, I'd run the big tubes. I ran 2" 3.5"collector custom headers on my n/a small block, didn't seem to mind.
I absolutely wouldn't spend the time and money to upgrade them. Even if you gained 10 HP and I really doubt that. You'll end up losing TQ in the RPM range.
FYI: I have 1-7/8" headers on a very well built 499 RB and that's all the header that engine needs.
Tom