Swap pistons for 11:1 compression and I'll bet it makes no less than 675Hp.This message has been edited. Last edited by: 1320racer,
November 28, 2020, 11:00 AM
Bob Deniker
Right now it's been 7 teens in the 1/8. 72 nova, 3450 with me in it. 400 with flat tappet cam, dual plane manifold, 6000 shift,full exhaust, 4.11 rear gear. A true driver. I have the engine out for maintenance and figured I'd increase the power some. It's kind of snowballing here. Maybe I should work with what I have, and try to just improve it some. It really isn't a racecar. I have those, but I still want it to open your eyes when you get after it.
Every engine is a street engine, even a sb with a 1" cam. Just depends on 1. how serious you are about power 2. servicing the power and 3. Experience.
We could drive this on the street, might have to put valve springs on it every other time out.
November 29, 2020, 04:32 PM
BIG SPEED
Customer brought us a 427 SBC from a nationally known builder.made 602 HP on our dyno had run 10.50 in 3400# 68 Chevelle.It had AFR 227 heads .WE sent heads and a new Holley 300-110 manifold to our guy Johbby Hasak at CFM South.WE did a cam and then back to the dyno engine is 11.1 measured CR.WE made 677HP a 75 HP improvement,Back to the track running through a TH400 it ran 10.15 at 133MPH so far.Cam is 254 Int and 111 lobe seperation also LS Firing order.
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November 29, 2020, 06:55 PM
Curly1
BIG SPEED knows and he is good at getting horsepower.
I think it I will be hard for a pump gas 406 motor to make 700 HP with out making too many sacrifices for drive-ability and durability. Like I said more cubic inches and better heads.
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November 29, 2020, 09:59 PM
Mike Rietow
quote:
Originally posted by BIG SPEED: Customer brought us a 427 SBC from a nationally known builder.made 602 HP on our dyno had run 10.50 in 3400# 68 Chevelle.It had AFR 227 heads .WE sent heads and a new Holley 300-110 manifold to our guy Johbby Hasak at CFM South.WE did a cam and then back to the dyno engine is 11.1 measured CR.WE made 677HP a 75 HP improvement,Back to the track running through a TH400 it ran 10.15 at 133MPH so far.Cam is 254 Int and 111 lobe seperation also LS Firing order.
Sounds good. This is a pretty good indicator how complicated it'll be to get to 700 hp 406 low compression. Heads ported and angle milled I'd imagine 427 cid.
November 30, 2020, 07:44 AM
Bob Deniker
I've built a number of small blocks that were near or above 700 hp, but all were race engines. Perhaps my goals are unrealistic to have a smooth running street engine. Maybe I'll make some small changes and try to get it up to 600-620 hp. Seems a better goal.
