5 replies to this topic

[crock]

Working on a 1380 big valve build. Some of the parts I have are unknown to me, but I have David Anton heads, a 266 degree cam and 9.3 compression. The car was using a 44HIF and I am wondering what advantage there would be if I switched to the original Cooper twin HS4 or the Works replica twin HS6. Along the same lines, does anybody know of an online source of dyno tests that would show me the results of different engine builds? that way I could make a more informed decision about how far I want to go with modifying the motor.

[liirge]

The Works minis used Twin H4 carbs and the cooper used twin HS2's

Your HIF will be fine, but if you want that retro look and noise then twin HS4's will be your best bet.

[Wil_h]

Also, 9.3:1 is a bit low, more suitable for a turbo application. 10:1 will work much better.

[liirge]

Also, 9.3:1 is a bit low, more suitable for a turbo application. 10:1 will work much better.

Yer I was going to mention that. The CR is appalling for a normally aspirated application

[crock]

9.3 actual measured compression is low? In California the best gas we can reliably get is the equivalent to British 95 octane. What kind of compression could I get away with using a 266 degree cam and 95 octane?
Also, are you saying that there is no real power benefit to dual carbs in this road application?

[liirge]

10.5 would be the MaX