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#1
11-03-2013, 11:50 AM
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KRE Heads
I cant afford 12.00 a gallon for race gas so thinking of setting my engine to run on pump gas.Here is my combo right now 455 with srp pistons crower rod stock 455 crank all balanced 630 lift solid roller 62 heads ported by Jim Taylor that flow 230 cfm victor intake with 1050 dominator carb 3800 ATI converter 4.10 gears out back. The car is a 79 firebird 3500 pound car it runs best 10.40's at 129 mph. Ok here is the question if i swap a set of KRE D port 84 cc heads with no port can i still run as fast as I am going now and run pump gas?????
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#2
11-03-2013, 11:59 AM
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another avenue would be swap to e 85 and keep you motor together if you are satisfied with performance.
__________________
 1963 Cat SD Clone (old school) streeter 1964 GTO post coupe, tripower, 4speed (build) 1965 GTO 389 tripower, 4 speed, driver 1966 GTO dragcar 1966 GTO Tri power, 4speed, barn find 1966 GTO Ragtop 1969 GTO Judge RA lll, auto 1970 GP SSJ 1970 GTO barn find..TLB…390 horse?….yeh, 390 1973 Grand Safari wagon, 700hp stoplight sleeper 525ci DCI & 609ci LM V head builds Factory stock oval track car |
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#3
11-03-2013, 12:04 PM
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I would find an E-85 source near you, buy a different carb, and run quicker than you are now. Just get a barrel and buy it 55 gallons at a time. There is a station within 50 miles of you.
__________________
Come take a ride http://www.youtube.com/watch?v=P7Y8Awfk2I0 2008, 2013, 2015, 2016, 2019 Central Il Dragway Mod track champion and 2015 IHRA Div 5 Mod champion 2024 Chief of the Pontiacs 
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#4
11-03-2013, 12:05 PM
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JC treed me! Lol
__________________
Come take a ride http://www.youtube.com/watch?v=P7Y8Awfk2I0 2008, 2013, 2015, 2016, 2019 Central Il Dragway Mod track champion and 2015 IHRA Div 5 Mod champion 2024 Chief of the Pontiacs
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#5
11-03-2013, 01:11 PM
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What does E 85 cost a gallon?
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#6
11-03-2013, 01:20 PM
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Darby Otto has a setup sounds similar to yours - KRE D's and hydraulic roller I think though, and I think it's a pump gas setup running 10.6-10.8, so close to your numbers. Maybe he'll chime in here...
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The secret to happiness is not getting what you want but rather, wanting what you have. |
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#7
11-03-2013, 01:33 PM
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Thx Chris, Yes were close , but u wont get there with the stock KRE's .I would get the 310's from SD performance, and u should be very close to what your running now, I only have 10.7 with the 290 heads and ran a best of 10.60@126 with more left. should be close to upper 10.40's in spring. I have 4.10's and a 9" 4600 stall UCC converter n drive it to track and around town.
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Darby 74 Grandville 2Dr 455 c.i 4550# 2011 1.60 60 ft,[email protected]@117.74  2017, 74 firebird -3600 lbs (all bests) 1.33 60 ft, [email protected] [email protected] M/T 275/60 ET SS Drag Radial 2024(Pontiac 505) 1.25 60 ft, [email protected], [email protected].... 275/60 Radial Pro's |
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#8
11-03-2013, 01:44 PM
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I was goin to suggest e85 too LOL
here in central il its $2.70 a gal. (I'll check that price and post later but im 95% sure thats were its at) one of the benefits for me is no more runnin home to fill up out of a barrel when im out cruising. |
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#9
11-03-2013, 03:02 PM
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Service Center of Yardley
194 S Main St Yardley , PA 19067 A quick google search came up with this place. Says they have E-85
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WWW.PatriotGuard.org Standing for those that stood for us. Only two defining forces have ever offered their life for you, Jesus Christ and the American G.I. One for your soul; the other for your freedom |
| The Following User Says Thank You to Bud Lyons For This Useful Post: | ||
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#10
11-03-2013, 05:29 PM
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To answer the question directly: I believe the out-of-the-box KRE 260s would keep you at/near your present performance level and run pump gas. Personally I would talk to Dave at SD Performance and get his input and buy from here if you decide to go ahead with the swap.
Jim
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65 Catalina sedan. Allen Thomas Performance 495. KRE Heads at 310cfm ported by SD Performance, ProSystems Dominator carb on ported Victor intake, P-Dude custom grind hydraulic roller, MSD ignition, 3.50 Moser/Ford rear. F-Glass front bumper by son Rob, rear by the old man and joint effort for trunk lid. 3950# w/driver. Best of 9.5761/139 on 175 shot, 6.01 /114 in 1/8. |
| The Following User Says Thank You to 66bonne For This Useful Post: | ||
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#11
11-03-2013, 06:42 PM
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I thank you all for your comments time to make so phone calls
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#12
11-03-2013, 07:40 PM
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I run #62s and converted over the E85 this past year ... spend your money on an E85 carb and save yourself a ton plus have a much more consistent race car. You won't regret it.
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'71 GT37 9.75/136 474 w/#62 D-ports from SD |
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#13
11-03-2013, 09:55 PM
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what kind of compression were/are you running?....
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71 GTO, 463, KRE 295 cfm heads ported by SD Performance, RPM intake, Qjet, Dougs Headers, Comp cams HR 246/252 ...11 to 1 , 3.55 cogs, 3985lbs.....day three- 11.04 at 120mph ....1.53 60', 6.98 1/8 mile |
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#14
11-03-2013, 11:57 PM
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e85 will support easily up to 13:1 safely and if tuned 14.5:1 is very common. And the price being at or below that of 87 it is a no brainier if it is available in your area.
__________________
1994 Formula 535ci NA CV-1 - single 1050 with c14 - 940hp@7000/825tq@5200 Pontiac Powered 4th Gen Project Progress 
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#15
11-04-2013, 12:07 AM
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Agree price of race gas is rediculous... pump premium limits you... IMO use E85 and mill your heads for more compression... Racers are running E85 at 14:1 or more... or if you want to go even faster move up to even better heads with small chambers and run E85.
E85 generally sells at or below 87 reg gas in my area... station I usually fill the family rides E85 was 2.89 a gallon and regular gas was 2.99 yesterday. |
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#16
11-04-2013, 09:36 AM
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Agree on the e-85 as you best alternative, just read up on as it is abit different than gas and be certain you don't have epoxy in the heads or intake.
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#17
11-04-2013, 10:47 AM
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Quote:
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#18
11-04-2013, 11:44 AM
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Quote:
Just a heads up, do what you find best. |
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#19
11-08-2013, 03:07 AM
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I can confirm that E85 eats JB Weld in the intake ...
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'71 GT37 9.75/136 474 w/#62 D-ports from SD |
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#20
11-08-2013, 07:55 AM
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I use 76cc 290cfm KRE's from Dave at SD Performance. The compression ratio is 11 to 1, and my engine runs fine on a steady diet of 87 octane fuel.
One could EASILY set up a full "race" engine with those heads to meet your performance expectations and do fine with a steady diet of pump fuel, with the right cam and careful tuning......IMHO. Nothing at all wrong with E-85, but there is a considerable learning curve with it. Aside from it's basic corrosive, evaporative, and water "magnet" properties, the feedback I get from my customers all say that the engine must be well "heat soaked" or they can experience stumble/hesitation/bog on the starting line. Most are doing quite well with E-85, and it LOVES high compression.....Cliff
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If you can read this, thank a teacher. If you can read this in English, thank a Veteran! https://cliffshighperformance.com/ 73 Ventura, SOLD 455, 3740lbs, 11.30's at 120mph, 1977 Pontiac Q-jet, HO intake, HEI, 10" converter, 3.42 gears, DOT's, 7.20's at 96mph and still WAY under the roll bar rule. Best ET to date 7.18 at 97MPH (1/8th mile), |
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