View Full Version : TR4/4A Putting H6 SU's on a TR4A intake manifold.

11-20-2012, 06:43 PM
Here is a quote I read somewhere,maybe the Competition manual:H"S"6 carbs have a shorter throat than H6 carbs and were intended to be mounted on the TR4A intake manifold which has a longer throat. While the SH6's will mount on the TR3 manifold. What would happen if you mounted the H6(longer throat)carbs on a TR4A manifold(longer throat)?A benefit or drawback in terms of better breathing?

Geo Hahn
11-20-2012, 07:00 PM
For one thing... you may encounter a clearance issue (between the forward carb and the inner wing).