He has double hump heads.I say your compression is too low. You are only starting with 8.7 STATIC, which gives you only 7.26 DCR with a cranking pressure of 144 psi.
And I'll bet that the Felpro .040" gasket brought it down even lower. Anyone else agree?
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I was going to retract this because I remembered about the blower. But I will leave it since I already ran the calculator.
Doesn't help when it's NOT correct. Just creates confusion.Racer slang.
At the strip at night gathering we SHORTCUT speak.
Saves time.
He has double hump heads.
They should be 64 CC combustion chambers.
They ran pretty decent in the day.
A friend had a 1970-1/2 Camaro LT1.
He street raced it daily for years.
Factory Turbo 400 Transmission & original with a shift kit. High RPM shift points at 6,000 rpm auto mode. Full manual control put into Low 1.
3.73 Posi in the 1 year only 1970 2nd Gen 12-bolt.
He spanked many on the streets.
Knocked down Big Block Chevy 454's.
Mopar 440 6-packs.
Put the power down & was 100 % reliable.
Static Compression I know is higher.
Wind up like a Snap On Air ratchet at 200 psi shop line pressure.
Gave up on the Horsepower Race Mike.Yes, I am familiar. I had a set of 186's with a lot of work done to them. They work better than most people would admit.
I agree with Rick, I have done a lot of reading lately about Turbo and Super charged engines, there is a direct science related to camshaft dynamics! I believe you would best serve yourself by putting in a cam with more duration, even more on exhaust side and also shorter overlap! Longer overlap and you’ll being pushing some of the charge right out the exhaust and getting less fuel mileage like Rick stated above!It will work, but will it work well enough to satisfy you?
With the the smaller LSA of 106° of your present cam, compared to the 114° LSA that Grumpy suggested,
the fuel mileage will be less. Some of your fuel/air mixture will be going out the exhaust valve during overlap.
That's just one consideration you have to make.
What static and dynamic compression ratio will you have with the present camshaft?