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Old 11-29-2012, 06:03 PM
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Originally Posted by ap72 View Post
The head has already been done so I'm sticking with it, if I ever do decide to change the engine rather than modify this one I way just swap in a Zetec 2.0L.

The compression is at like 9.8:1 so its not too bad- I'm more worried about tuning the carbs with the big cam than anything else.
What size and type of carbs were you planning to use and from what motorcycle or straight racing smooth bore flat slides. Bike have very high velocity intake tracs. You will be able to make it work all else fails send the data to the carb manufacturer and have them suggest the proper jetting and adjustment settings. I think idle will be your biggest challenge mid and wot will work fine with bigger jets but the idle circuts are tiny and the screws have very little adjustment. Make sure you get the kind that have idle adjustment screws. Usally covered by alum plug that needs to drilled out on street bike carbs. Most have two one screw for idle air and one screw for idle fuel that is factory set and capped.

Remeber to get the mains right then try to tune the rest. You may not need to touch the needles for the mids, wont know until you got it dailed in. If you change the mains once its dailed in you will need to retune to get smooth transistions. Basic bike jet kit type stuff shimm the needles or replace them.

Also be sure you get side drafts and not down drafts. Most newer bikes that had carbs were down draft. R6 and r1 carbs point straight down in the bike so the floats are in different location.

Suzuki sv1000 has two very large throttle bodies if you decide to go efi. Four of those should be very nice.

Have you figured out a manifold. I used a flat plate of alum and intake manifolds from motor cycles. If you look around you should be able to find manifolds that bolt down with two bolts for each carb. Then just bolt the plate to the head. I know sounds easy right i did need a mill to make this work.
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