Quote:
This should help.
on a 300hp 360 magnum there was 4hp and 6ftlbs of torque difference between the 318 manifolds and the early 340 manifolds.
There was 11hp and 16ftlbs difference between the 340 manifolds and a set of TTIs.
Thats with a very mild cam that I believe has a wide lsa.
The more power the motor makes the igger the difference you will see between the hp manifolds and headers.
That said Im still considering running manifolds on my next motor.
Which 318 manifolds? The good magnums or a set off of a 72 318 2bbl motor? The early magnum manifolds are very good and are comparable to the early 340s where as the non-magnum 318 manifolds are no where close.
'65 Belvedere
'68 GTX
'57 Dodge pickup
| 
