Enginethingymabobby..

Merlin "saw dyno man yesterday, he had a load of questions about your enginei need to know what the compression ratio is,also he was wondering why there was only a twin port carb,and what its spose to rev too, i couldnt answer these questions but it was still a very interesting visit,he had only just finished dynoing a v8."

Jon: Compression - hmm, not sure 100% tho he should have a gauge to stick down the cylinders - worth doing a compression test anyway to double check all okay.. I'd hazzard pretty high - about 11:1 being a 348 crank, with thou overbore to 358. Low-torque Cam is good for 9000rpm for oval downshifts, will be quite cammy at idle but if he smooth that out a bit then great.. peak power between 7400-7800rpm depending on advance so hard limit around 8000-8200 poss (you have chips), solid lifters, nascar springs (loose) for high revs, designed to run best on about 107 RON (street) and 114 (race) with some lead added so aim to wind back the advance to run around 103-105 RON if poss.If you dig out Bary's notes (also on the engine plaque) then it has all the notes on the cam duration and lift and he'll have the timings and can probably estimate the compression from there. Notes also give the initial start up (slow and easy) and Bary even notes which pill modules to try first etc, i.e. run up to 4k, baseline then work gradually up to limiter at 7400 - check advance/mix before trying higher.

.. So why a Twin-port Carb?

Twin port for better throttle response over a BIG 4 -barrel - but still flows about 600cfm. It looks like a basic Holley but it has Da Vinci jets etc inside.. hand finished.. should work really nice.. If guys still thinks fuelling a problem at high duty cycle then let me know.. biggest one to watch is the fuel pump.. we may need to up that but see how he gets on. The high power band is why that ram-air intake would work so well.Unlike most crates over here - this vee should rev its nuts off and all the oomph is higher up the rev range so don't need massive fuel down low like more torquers. I think peak torque is auposed to be around 5800rpm on that cam so mention that to the guy.