New to Site and need some opinions

[GoinBroke]

Greetings all,

I am restoring a 69 and would like some help on the next area I am facing at the moment. I have searched and am still undecided on the direction I would like to go concerning the point below and any help would be greatly appreciated.

1. My engine is almost complete and he is recommending at least 1 3/4" primaries on the headers. After rising from the floor after sticker shock I am wondering what would be the ballpark loss of hp/tq would be to using 1 5/8" instead with the car being a weekend criuser using the engine build as follows. 408 Windsor, alum. heads, dual plane intake at 10.3 cr.


Thanks in advance

 

[bnickel]

hp loss shouldn't be too signifigant and tq will probably be about the same possibly higher on the bottom end as the little bit extra backpressure might build a couple lb/ft. i wouldn't be too concerned

 

[GoinBroke]

Thanks for the info bnickel

 

[bnickel]

welcome