Hey guys. I remember that with aluminum heads in pre LT1 block that 10.5:1 is really highest you can run on 92 octane, but this 100 octane really opens up some more doors as far as my new motor is concerned...How much CR do you think I can safely run with 100 octane? 11.5, 12?

------------------
1982 Camaro Z28

trying to make it worthwhile for the spring....

Check the website for progress http://members.fbody.com/Pro82Z/

 

well one of my friends has a v-8td s-10 truck, and he runs airplane fuel (avgas) and he has about 13:1 compession in his 383 stroker. i'd say 12:1

------------------
1989 firebird formula

Mods: converted from T.B.I. to a carburator 305 to a 350. Flowmater exhaust,hedman shortie hedders,202 heads,350 horse cam,bored.40 over, Edlebrock torker2 intake.

Future mods performer rpm air gap intake (polished) and 600 edlebrock carb, comp roller cam, and way better headsa 400 defintely in the works!

 

how much is the 100 oct per gallon out of curiosity?

 

I would say 12.5-.75 would be the limit. My question is why? What happens when you need gas in B.F.E.? Besides if you can run on normal gas you can look around for the cheap stuff.

------------------
82 z28 350cid, vortec heads, comp 262h cam, Holley 600cfm carb, 2in twice pipes, MSD ignition, turbo 350 trans, 3.73 posi, manly b&m megashifter

 

It's 2.99 a gallon for 100 octane...I was just thinking how cool it would be to run Victor Jr. 23* heads and CNC ported matching intake. It's supposed to give you 550+ horses, but that number is significantly reduced if you can't run a higher compression.

I guess I could just get some milder heads and build up my shortblock for a 6-71 or something, but I like high powered N/A motors. This isn't a daily driver by any means...

 

High compression builds torque. HP just comes along for the ride.

------------------
Follow my racing progress on Stephen's racing page
and check out the race car

87 IROC-Z Pro ET Bracket Race Car
383 stroker (carbed) with double hump cast iron heads and pump gas
454 Big Block almost ready for the 2001 racing season

Best results before the 383 blew up
Best ET on a time slip: 11.857 altitude corrected to 11.163
Best MPH on a time slip: 117.87 altitude corrected to 126.10
Altitude corrected rear wheel HP based on power to weight ratio: 476.5
Best 60 foot: 1.662

Racing at 3500 feet elevation but most race days it's over 5000 feet density altitude!
Member of the Calgary Drag Racing Association

87 IROC bracket car, 91 454SS daily driver, 95 Homebuilt Harley

 

OK fine, so I can get boatloads more torque Either way to get me down the 1/4 mile faster.

I don't think it matters at this point, because I might have just scored a 454.