. Put 3.27:1 gears in the car, pulley the s/c for 10-12 psi and plan on buying new rear tires. Please use long tube 4 into 1 headers. You should not intentionally choke the engine with a Tri-Y when using a KB s/c.
Thanks again for your help, I'll go for the Ford Powertrane Application stepped headers.
3.27:1 gears: I had been kicking around going with gears in the 3.50:1 range, but you got me thinking and playing with a gear ratio calculator and then thinking some more.
My T-56 ratios are 2.97, 2.07, 1.43, 1.00, 0.80, 0.62
3.27:1 at 5500 rpm in 1st=43 mph, 2nd=62 mph, 3rd=90 mph, 4th=128 mph 5th=160 and 6th=207
6th gear @ 60 mph= 1600 rpm
3.00:1 @ 5500 rpm = 1st=47, 2nd=67, 3rd=98, 4th=140, 5th=175, 6th=226
6th @ 60 mph=just under 1500 rpm
Okay, so lets forget the redline 5th and 6th gear mph. Even if the car could (it Won't) I won't, but look at the 60 mph rpms at 60. 1600 rpm and sub 1500 rpm.
Along with the power, I am wanting 20+mpg while cruising on the freeway.
Obviously, within reason, less rpm = better mpg.
How did your street car run when cruising at 1500 rpm?
I'm assuming that you had a 5 speed, what was the lowest rpm that you would cruise in 5th before you would then shift to 4th to bring up the rpm's?
Do you think that 3.00:1 would be too high for my car? 3rd gear from 25 to 98 mph could be fun and 4th from 35 to 120 mph would be a blast with a lot of torque.
If I reduced my goals to just 2, they would be 20+ mpg when cruising and into the 12's in the 1/4, do you think this is possible with these gears?
Pulley for 10-12 psi
With the 72cc chambers I will be somewhere in the area of 8.0:1 compression.
Do you think I can run 92 octane pump gas without pulling the timing, using A2A intercooler or water injection while pullied for 12 psi?
Thanks again.
Ken