500 stroker motor with 9.1 compression
#578485
01/10/10 01:07 PM
01/10/10 01:07 PM
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Joined: Oct 2004
Posts: 502 North Texas
1AARCUDA
OP
mopar
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OP
mopar
Joined: Oct 2004
Posts: 502
North Texas
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Would a 500 stroker motor with 9.1 compression benefit from 110 octane racing fuel or would I be wasting my money? Thanks!
1970 AAR CUDA
1970 Super Bee 383 Auto
1969 Super Bee 383 4Spd
1968 Satellite 500 Stroker
1986 Shelby GLHS
1970 Coronet 500 383 Auto
1996 Indy Pace Truck
1998 Dakota R/T 408 Stroker
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Re: 500 stroker motor with 9.1 compression
[Re: 1AARCUDA]
#578487
01/11/10 04:56 AM
01/11/10 04:56 AM
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Joined: Mar 2007
Posts: 3,287 West Coast, USA
jbc426
master
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master
Joined: Mar 2007
Posts: 3,287
West Coast, USA
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Is it suffering from detonation on pump gas?
1970 Plymouth 'Cuda #'s 440-6(block in storage)currently 493" 6 pack, Shaker, 5 speed Passon, 4.10's 1968 Plymouth Barracuda Convertible 408 Magnum EFI with 4 speed automatic overdrive, 3800 stall lock-up converter and 4.30's (closest thing to an automatic 5 speed going)
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Re: 500 stroker motor with 9.1 compression
[Re: 1AARCUDA]
#578488
01/11/10 07:42 AM
01/11/10 07:42 AM
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Joined: Jun 2003
Posts: 52,972 Romeo MI
MR_P_BODY
Master
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Master
Joined: Jun 2003
Posts: 52,972
Romeo MI
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Quote:
Would a 500 stroker motor with 9.1 compression benefit from 110 octane racing fuel or would I be wasting my money? Thanks!
Most likely it will hurt the performance unless it has a detonation issue(which I wouldnt think so)... JMO
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Re: 500 stroker motor with 9.1 compression
[Re: 1AARCUDA]
#578489
01/11/10 10:44 AM
01/11/10 10:44 AM
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Joined: Oct 2004
Posts: 502 North Texas
1AARCUDA
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mopar
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OP
mopar
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North Texas
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Have not fired it up yet, still waiting for parts to drop it in. What about a mixture of 93 octane and 110, maybe 2 gallons of 110 to 3 gallons of 93 in a 5 gallon jug?
1970 AAR CUDA
1970 Super Bee 383 Auto
1969 Super Bee 383 4Spd
1968 Satellite 500 Stroker
1986 Shelby GLHS
1970 Coronet 500 383 Auto
1996 Indy Pace Truck
1998 Dakota R/T 408 Stroker
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Re: 500 stroker motor with 9.1 compression
[Re: 1AARCUDA]
#578491
01/11/10 10:51 AM
01/11/10 10:51 AM
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Joined: Oct 2006
Posts: 4,590 Indy
joshking440
Lunch is on me!
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Lunch is on me!
Joined: Oct 2006
Posts: 4,590
Indy
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Quote:
Would a 500 stroker motor with 9.1 compression benefit from 110 octane racing fuel or would I be wasting my money? Thanks!
It would if you threw on a big old turbo.....come on
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Re: 500 stroker motor with 9.1 compression
[Re: Stanton]
#578492
01/11/10 11:04 AM
01/11/10 11:04 AM
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Joined: Mar 2008
Posts: 5,746 Ontario, Canada
Dodgem
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master
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Ontario, Canada
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Quote:
Why not just 87 Octane regular ... it's a lousy 9:1 !!!
if it has aluminum heads it's the same as 7.5 to 1??
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Re: 500 stroker motor with 9.1 compression
[Re: 1AARCUDA]
#578495
01/11/10 11:48 AM
01/11/10 11:48 AM
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Joined: Jan 2003
Posts: 1,263 Southwestern Ontario Canada
racealittle
pro stock
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pro stock
Joined: Jan 2003
Posts: 1,263
Southwestern Ontario Canada
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If it is aluminum heads, 87 octane will do the job. Iron heads may need 91-93 until you get things sorted.
I run an aluminum head 9.3:1 440 on 87 and it's just fine.
Too many cars, too many parts, too little coin, too little space to work in, too little time left to make it all happen!
Update: down to one ride, still too many parts, a little more jingle in the pocket, gaining space, and it's going to happen this year!
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Re: 500 stroker motor with 9.1 compression
[Re: 1AARCUDA]
#578497
01/11/10 11:53 AM
01/11/10 11:53 AM
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Joined: Mar 2008
Posts: 5,746 Ontario, Canada
Dodgem
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master
Joined: Mar 2008
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Ontario, Canada
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Quote:
Ok, I get it! Thanks for all the input. Happy Racing this coming year.
Well the 500 inches is not the requirement for octane but the final compression, coupled with cam specs and consideration for aluminum of iron heads.
A 9 to 1 motor with a 204/210 duration cam @ .050 may need some extra above 93 octane while a 275/284 @ .050 may not need any octane above 93 and may well run on less aluminum heads generally will need less octane than Iron.
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Re: 500 stroker motor with 9.1 compression
[Re: 1AARCUDA]
#578499
01/11/10 12:03 PM
01/11/10 12:03 PM
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Joined: Oct 2004
Posts: 502 North Texas
1AARCUDA
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mopar
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OP
mopar
Joined: Oct 2004
Posts: 502
North Texas
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Cast Iron Stage V heads from Mopar Performance, I will have time to test and tune it in Feb, but looks like I would not need to spend $8.00 a gallon on 110
1970 AAR CUDA
1970 Super Bee 383 Auto
1969 Super Bee 383 4Spd
1968 Satellite 500 Stroker
1986 Shelby GLHS
1970 Coronet 500 383 Auto
1996 Indy Pace Truck
1998 Dakota R/T 408 Stroker
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Re: 500 stroker motor with 9.1 compression
[Re: 1AARCUDA]
#578501
01/11/10 12:08 PM
01/11/10 12:08 PM
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Joined: Oct 2004
Posts: 502 North Texas
1AARCUDA
OP
mopar
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OP
mopar
Joined: Oct 2004
Posts: 502
North Texas
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509 lift 248 duration @.50
1970 AAR CUDA
1970 Super Bee 383 Auto
1969 Super Bee 383 4Spd
1968 Satellite 500 Stroker
1986 Shelby GLHS
1970 Coronet 500 383 Auto
1996 Indy Pace Truck
1998 Dakota R/T 408 Stroker
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Re: 500 stroker motor with 9.1 compression
[Re: 1AARCUDA]
#578504
01/11/10 12:19 PM
01/11/10 12:19 PM
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Joined: Jan 2003
Posts: 32,394
Quicktree
I Win
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I Win
Joined: Jan 2003
Posts: 32,394
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Quote:
Have not fired it up yet, still waiting for parts to drop it in. What about a mixture of 93 octane and 110, maybe 2 gallons of 110 to 3 gallons of 93 in a 5 gallon jug?
you probably need it. you do know the more octane you use the slower the burn rate right? I would start with regular 93 and work your way down.
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