Blower Friendly Motor??

what happens with the mc bar depends on the blower, but you might be able to find one that lets you keep it there. 9.5:1 is a little on the high side for blowers, so you might have to keep the boost lower. (Instead of 8-10 psi, perhaps 6-8 psi... this is all relative to the blower). But I see no reason why you couldn't use a blower with low to moderate boost and see nice gains.

Aren't the Keith Black pistons hypereutectic? Better than cast, but not as good as forged for boosted applications. For low boost, you should be fine.

You have two things working against you...your compresssion and your pistons. I thought the RPM heads had a 202 intake valve??

7 psi should be fine with those pistons, but that compression ratio is going to give you probs. Even with premium I'd think you'd have to retard the timing quite a bit at full boost. My car is 7.5-1 and I run 11-12lbs right now on Prem fuel at 32deg full timing.

Id say 6psi on pump premium gas, but still be very careful of your timing.

these guys pretty much have it covered. on our dyno, weve seen a 10:1 car with 7-8 lbs run hard with no detonation on 100 octane, so you MIGHT get away with it. but the tune has to be DEAD ON. especially for the hyper pistons to last. one thing these guys didn't bring up: people always worry about the pistons, but you'll melt plugs before the pistons. go at least one range colder and gap them smaller than NA cars. make sure your ignition is on its A-game!

dont worry too much about the heads. you can get a thicker head gasket to lower compression a little, polishing the chambers will lower it a little more. if you start lunching head gaskets, you might need to O-ring the heads, but for under 8 lbs, i doubt it.

the novi 1200 is a great kit. its what im going to run on a gt-40p headed windsor once its built. im going t run 8.5/9:1 compression and i want it on 97 octane. a hint: adjustable boost retard! and the tune up! i can't stress it enough. the novi calls for a HP (holly) or Mighty demon carb, so expect to get a new carb.

as for the rest of the buildup, it seems great. it sounds like a strong car. one of the mustang magazines took a painfully stock 65 fastback factory rated at 225 hp and added the novi 1200 at 5-7 lbs (i think) and got 300 rwhp. so not bad. you should gain a realistic 75 to a lucky 100 hp since your combo is already pretty efficient.

Rick

Thicker gaskets arent always a good idea though, you change how the combustion chamber burns and instead of possibly making things better with lower compression, you might create worse hot spots cause of movement in the chamber. Its a bandaid way to do things, and a bad one at that.

Blown engines do better with colder plugs anyways, or at least with roots style. I personally run the coldest plugs I could find with zero probs.

I'd guess 40% increase in power, but its really all in your tuning, it will make a huge difference. BTW, an aftercooler on a centrifigal blower will get you some more safety with the high compression, and give you a very nice hp increase.

I'm sure under the right tune you could run more boost, but your window of error starts to become very small. Race gas, then ya crank it up, but normal driving I'd just go for the 6-7psi and be happy. Should be a very very nice increase. My old setup went from a 14.8@98 to 12.56@110 with the same exact motor + 10psi boost. Different blower, but non the less, cent should make more hp than my roots.