1969 Barracuda 340 Formula S Restoration
After I got the engine stripped, I cc'd the heads etc to get the compression ratio. Turned out to be only 8.7:1 so with the purple shaft Mopar cam that explains why it didn't have much low end torque. I've corresponded with Hughes about one of their cams. They recommended a SEH2832AL-10 assuming I could get the CR up to 9.5. I ran this through my software engine "dyno" (Engine Analyzer from Performance Trends) and it seemed too radical for what I was after. (I'm looking primarily for a good street cruiser running stock CI exhaust manifolds, 3.23 gears and stock TC)
I ran these through my dyno. Hughes recommended abt 9.25 CR for these.
SEH2428AL-11
SEH2226AL-10
SEH2024AL-11
Haven't made a final decision yet but the 2226AL sounds about right
Use: Hot street, works well with performance heads and high flow throttle body/carb, upgraded injectors
Idle: Noticeable
Vacuum: Fairly High
Converter: Stock to mild stall
Rear gear: 3.00 to 3.55
Benefits: Good idle, resto/cruiser, hot daily driver
With different head gasket thicknesses (Cometic) and by using a nail head intake valve (as opposed to the dished tulip intakes now in the engine) I can get CR's between 8.7 and 9.7
After I got the engine stripped, I cc'd the heads etc to get the compression ratio. Turned out to be only 8.7:1 so with the purple shaft Mopar cam that explains why it didn't have much low end torque. I've corresponded with Hughes about one of their cams. They recommended a SEH2832AL-10 assuming I could get the CR up to 9.5. I ran this through my software engine "dyno" (Engine Analyzer from Performance Trends) and it seemed too radical for what I was after. (I'm looking primarily for a good street cruiser running stock CI exhaust manifolds, 3.23 gears and stock TC)
I ran these through my dyno. Hughes recommended abt 9.25 CR for these.
SEH2428AL-11
SEH2226AL-10
SEH2024AL-11
Haven't made a final decision yet but the 2226AL sounds about right
Use: Hot street, works well with performance heads and high flow throttle body/carb, upgraded injectors
Idle: Noticeable
Vacuum: Fairly High
Converter: Stock to mild stall
Rear gear: 3.00 to 3.55
Benefits: Good idle, resto/cruiser, hot daily driver
With different head gasket thicknesses (Cometic) and by using a nail head intake valve (as opposed to the dished tulip intakes now in the engine) I can get CR's between 8.7 and 9.7