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would race fuel help #302755 04/29/09 12:21 AM 04/29/09 12:21 AM
Joined: Mar 2004 Posts: 878 hudson valley n.y. G GEORGE68HEMIRR OP super street
GEORGE68HEMIRR OP super street G Joined: Mar 2004 Posts: 878 hudson valley n.y.	going to lebonan valley friday....a bunch of us rented the track for the day[hope it dont rain] and i am running on 93 pump gas....heres what i got....heres what i have....572 hemi/68 pro-street roadrunner keith black aluminum block scat 4340 non-twist forged crank oliver billet steel race rods J E 11.5 to 1 pistons bullit flat tappet solid cam 283/283 duration @.050 711 intake/690 exhaust schubeck composit lifters smith brothers push rods stage v big valve heads 2.40/1.94 comp port and polished by tim...forhemisonly stage v 1.6 ratio roller rockers billet rocker stands milodon swing gate dual line system milodon 9 qt pan milodon gear drive msd distrib and 6 al tti 2 1/8..3 1/2 indy tunnel ram 2-1050 pro-system dominators meziere electric water pump taylor 10.44mm wires ati super damper dynamic 727..broke..going for cope race tranny/which is in now dynamic 9.5..3800stall convertor....going for the ptc..which is in now,3200 stall mark williams chrome moly shaft with hd joints dana 60..4.30 gears.. moser axles 29.5/13.50-15 mt slicks 8 point cage and frame connectors mini tubbed/super stock springs moved in 3 inches mallory comp 250 fuel pump areomotive billet fuel pump controller triangle 20 gallon fuel cell ran a 10.8/127 but had problems running into rev limiter...one run only...snapped pinion yoke ears then other shaft dropped on second run runner weighs ? 3650 through 3900...i have to check that do you think if i run race fuel it would run any better and what octane should i use??...thanks

Re: would race fuel help [Re: GEORGE68HEMIRR] #302756 04/29/09 12:34 AM 04/29/09 12:34 AM
Joined: Jun 2003 Posts: 52,972 Romeo MI MR_P_BODY Master
MR_P_BODY Master Joined: Jun 2003 Posts: 52,972 Romeo MI	With all of the alum you have it should stay pretty cool and if its tuned correctly for the 93 it shouldnt be a problem

Re: would race fuel help [Re: MR_P_BODY] #302757 04/29/09 12:43 AM 04/29/09 12:43 AM
Joined: Dec 2006 Posts: 4,647 aotearoa rebel master
rebel master Joined: Dec 2006 Posts: 4,647 aotearoa	each to their own, but if that was my engine with that compression & cam, i'd run 103-105 octane. our fuel might have a different rating but even so i'd take a jug of higher rated gas & try it out. you'd have to bump up the timing a bit but if it meant going faster i'd try anything.

Re: would race fuel help [Re: GEORGE68HEMIRR] #302758 04/29/09 11:10 AM 04/29/09 11:10 AM
Joined: Mar 2007 Posts: 3,285 West Coast, USA jbc426 master
jbc426 master Joined: Mar 2007 Posts: 3,285 West Coast, USA	I'd put a wideband on it and see if that fuel pump was running out of juice well before the traps. You're feeding a lot of carb there. 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)

Re: would race fuel help [Re: rebel] #302759 04/29/09 01:13 PM 04/29/09 01:13 PM
Joined: Oct 2004 Posts: 8,165 Left Coast B BobR master
BobR master B Joined: Oct 2004 Posts: 8,165 Left Coast	Quote: each to their own, but if that was my engine with that compression & cam, i'd run 103-105 octane. our fuel might have a different rating but even so i'd take a jug of higher rated gas & try it out. you'd have to bump up the timing a bit but if it meant going faster i'd try anything. I agree. Detonation cannot always be detected until your rod bearings drop out of the saddles. I understand what Mike is saying about the aluminum but with 11.5-1 I would use some amount of race gas-just to be safe.

Re: would race fuel help [Re: BobR] #302760 04/29/09 03:00 PM 04/29/09 03:00 PM
Joined: Mar 2004 Posts: 878 hudson valley n.y. G GEORGE68HEMIRR OP super street
GEORGE68HEMIRR OP super street G Joined: Mar 2004 Posts: 878 hudson valley n.y.	Quote: Quote: each to their own, but if that was my engine with that compression & cam, i'd run 103-105 octane. our fuel might have a different rating but even so i'd take a jug of higher rated gas & try it out. you'd have to bump up the timing a bit but if it meant going faster i'd try anything. I agree. Detonation cannot always be detected until your rod bearings drop out of the saddles. I understand what Mike is saying about the aluminum but with 11.5-1 I would use some amount of race gas-just to be safe. what octane should i use??

Re: would race fuel help [Re: GEORGE68HEMIRR] #302761 04/29/09 03:10 PM 04/29/09 03:10 PM
Joined: Jun 2003 Posts: 52,972 Romeo MI MR_P_BODY Master
MR_P_BODY Master Joined: Jun 2003 Posts: 52,972 Romeo MI	what octane should i use?? If your going to add, just use some 100 octane but you will most likely need to add some timing to help the burn rate

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