Forces Posted October 3, 2006 Share Posted October 3, 2006 I have acquired some ceramic-coated block hugger headers that have 1 5/8" primaries and 2 1/2" collectors. Would it be that big of a difference to ditch 'em and go for the 1 3/4" primaries and 3"? BTW, planning on running 3" exhaust regardless of collectors with side exit and all mandrel bends. Engine: 383 stroker with flat top duel valve relief forged pistons. Edlebrock 66 cc RPM performers, Air gap intake, 700 CFM square bore carb. *EDITED FOR TYPOS* Quote Link to comment Share on other sites More sharing options...
grumpyvette Posted October 3, 2006 Share Posted October 3, 2006 those 1 5/8" should be fine!, the differance is only a few hundred rpm in effective rpm in the tq range, and you tend to lose some low rpm tq with the larger primairies I would not swap to the larger size untill you run full length headers, (IF THEN) simply because youll be very unlikely to reach the rpm ranges where 1 3/4 headers are of ANY benefit with your combos smaller port heads and dual plane intake Quote Link to comment Share on other sites More sharing options...
Recommended Posts
Join the conversation
You can post now and register later. If you have an account, sign in now to post with your account.