That's an interesting comment. The car's pedal is connected to a spring on the carburator by a metal cable. I don't think there's much progession going on there. I'll have to look at that.
I don't know what are the impact of low BSFC numbers on the engine?
Eric
Indeed, AC is an available option. Heating is an option too :-)
As I mentioned, this will be a weekend racer, not a full blown race car. As for the streets, the Ultima outhandles and outbrakes the Pantera, hopefully I'll be able to tame the beast when street driving. ;-)
Since I'm building the...
The dyno numbers I posted are from an actual run of the motor on an engine dyno.
Motor specs: 10.5 compression, CNC ported cyl. heads, Edelbrock 2950 manifold, Comp Cams CS258/264 roller cam, .020"/.022" valve lash, Holley 750 cfm carb, 1 7/8" diam. headers, Jesel rocker shaft, SCP 3 stage dry...
You are right. The accusump is not necessary, and I probably won't install it on the car.
I only got the dyno chart for the second half of the rpm range right now, so I still can't tell how 1st gear is going to be like.
The dyno chart shows from:
RPM TORQUE HP BSFC OIL_TEMP...
here's a revised gear ratio charts. It think this one is much better.
1st - 3.00
2nd - 1.79
3rd - 1.29
4th - 0.97
5th - 0.76
Final - 3.44
The motor gets peak power 640hp @ 6500 rpm. The main cause of failure for this particular engine is oil starvation, which should be mitigated by using a dry...
About those ratios being a bit on the strange side. That's why I posted on this forum, to get some help adjusting them so they are correct for the car's intented use :)
So how streetable would 1st gear be with 2.83 ratio?
Eric
Thanks for the input guys! I'm gonna change 1st gear to 2.83. I should probably adjust 3rd gear too, the change from 2nd to 3rd is a bit too small. Probably 1.25.
The goal is to be able to drive it on the street.
It is a indeed 640 HP carburated, dry sump motor with an accusump to prevent oil...
I'm currently building a street-legal racing car with the following specs:
Motor: SBC V8 - 640 hp - 6500 rpm redline
Gearbox: Porsche G50/01 5 speed manual
Tires: 18" (26" diameter) stree tires
The car weight 2200 pounds.
I'm wondering if these gear ratios are acceptable:
1st - 2.43
2nd -...