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#1
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street/strip 455
i have a 455 35 0ver with srp piston flat top with 5 cc reliefs stroker motor # 16 heads crower solid lifter cam 60310 looking to go to ede round port heads 87 cc 310cfm tired of race fuel want to run pump gas. question waht cc dish piston will i need to be able to run 93 octane in it ./
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#2
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You should be fine with the SRP flat tops and an 87cc chamber. I'm running the same pistons in my .035 over 455 (463) with 80cc chambers in my E heads on 91 octane. With zero deck, mine comes out to 11:1
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'68 Firebird 463/pump gas/SD 325 E-heads/266-272 SR cam/1050 Dominator/3.73/ET Street Radials/1.37 60'/6.30@108.80/9.93@135.14 Hot Rod Drag Week finishing averages: 2014 - 11.12 @ 118.56 2015 - 10.84 @ 124.97 2016 - 10.56 @ 127.88 2017 - 10.29 @ 130.74 2018 - 10.29 @ 130.53 2019 - 10.16 @ 132.34 2021 - 10.09 @ 132.69 2022 - 10.13 @ 133.07 9.93 run - https://youtu.be/hII0_UlYM4U |
#3
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You should be good to go with the 85cc chamber heads. Be somewhere in the neighborhood of 10.5:1. Depending on tuning and cam choice you may be able to run mid-grade.
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-Jason 1969 Pontiac Firebird |
#4
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What are you running for a Intake Manifold and what rear gears are you running?
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Wernher Von Braun warned before his retirement from NASA back in 1972, that the next world war would be against the ETs! And he was not talking about 1/8 or 1/4 mile ETs! 1) 1940s 100% silver 4 cup tea server set. Two dry rotted 14 x 10 Micky Thompson slicks. 1) un-mailed in gift coupon from a 1972 box of corn flakes. Two pairs of brown leather flip flops, never seen more then 2 mph. Education is what your left with once you forget things! |
#5
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I've built quite a few engines with the 5 CC pistons and 85-87 CC aluminum heads. Most have the 236/242 hyd. roller cam in them and run fine on 93 octane fuel. No hint of detonation at all.
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62' Lemans, Nostalgia Super Stock, 541 CI, IA2 block, billet 4.5" crank, Ross, Wide port Edelbrocks, Gustram intake, 2 4150 style BLP carbs, 2.10 Turbo 400, 9" w/4:30 gears, 8.76 @153, 3100lbs |
#6
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The heads on my 455 are KRE's with 76cc chambers. Calculates out to 11.3 to 1. Been fine on a straight diet of pump gas now for quite a few years. The cam is a big player here, duration, LSA and intake closing point and overlap can make or break that deal.......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), |
#7
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Loved the 60310 when I was running it in my flat top 463 with big chamber KRE D ports. That motor ran fine on 93. I am considering swapping out the OF and going back to the 60310 in my current engine.
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71 Formula 433, Splayed cap 400 block, 4" stroke Scat forged crank, 6.8 Eagle rods, custom Autotec pistons. SD 295 KRE D ports, Old faithful hybrid roller, Torker II, Holley Sniper Stealth, Tribal Tubes, TKO 600, 3.73 Eaton posi. |
#8
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compr calcs
455 +030 .005" proud. 0deck .023" in the hole 5Cs 98cc __11.93:1 __ 11.79:1 ___11.19:1 48s 78cc __9.88:1 ___ 9.79:1 ____ 9.39:1. per wallaceracing.com
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12.24/111.6MPH/1.76 60'/28"/3.54:1/SP-TH400/469 R96A/236-244-112LC/1050&TorkerI//3850Lbs//15MPG/89oct Sold 2003: 12.00/112MPH/1.61 60'/26"x3.31:1/10"/469 #48/245-255-110LSA/Q-Jet-Torker/3650Lbs//18MPG 94oct Sold 1994: 11.00/123MPH/1.50 60'/29.5"x4.10:1/10"/469 #48/245-255-110LSA/Dual600s-Wenzler/3250Lbs//94oct |
#9
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Quote:
Interesting. XE284 HFT 284/296 - 240/246 - .507/.510 - 110 ( not a favorable reputation here) 60310 SFT- 284/288 - 240/248 -.477/.501 - 112 - lash - .022 / .024 |
#10
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XE-285 with 1.65 rockers, 85cc e heads that roll 310 cfm. Exactly 10.85:1 compression with KB hypers. Loves 93 octane. 37* total timing. You'll be fine!!
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" Is wearing a helmet illegal" Mike Kerr 1-29-09 |
The Following User Says Thank You to 4dblnkldude For This Useful Post: | ||
#11
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tell us about the car, maybe it’s got some gear, a manual trans, and/or manual brakes. i want someone to talk you into a 290b6 so you can post a youtube link to your car idling and I can watch it.
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#12
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The combustion chamber design will also have a effect on the situation.
Of interest, how combustion chamber design relates to engine performance.... https://www.hotrod.com/articles/0209...stion-chamber/ .
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'70 TA / 505 cid / same engine but revised ( previous best 10.63 at 127.05 ) Old information here: http://www.hotrod.com/articles/0712p...tiac-trans-am/ Sponsor of the world's fastest Pontiac powered Ford Fairmont (engine) 5.14 at 140 mph (1/8 mile) , true 10.5 tire, stock type suspension https://www.youtube.com/watch?v=qDoJnIP3HgE |
#13
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The calculator I used comes up with 10.65 with a .028 head gasket with .000 deck. Just for fun I did it with .000 for head gasket it was 11.31
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#14
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Running torker intake 373 gear 3000 stall
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#15
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373 gear auto 3000 stall torker intake
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#16
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Torker intake 373 gear 28 inch tall tire 3000 stall
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#17
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Sorry took me so long get back could you tell me more bout cam your running
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#18
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Quote:
This is my second cam with the Comp XE Street Roller lobes. I've been very happy with them. They seem to be very easy on valvetrain parts and don't require a lot of spring pressure.
__________________
'68 Firebird 463/pump gas/SD 325 E-heads/266-272 SR cam/1050 Dominator/3.73/ET Street Radials/1.37 60'/6.30@108.80/9.93@135.14 Hot Rod Drag Week finishing averages: 2014 - 11.12 @ 118.56 2015 - 10.84 @ 124.97 2016 - 10.56 @ 127.88 2017 - 10.29 @ 130.74 2018 - 10.29 @ 130.53 2019 - 10.16 @ 132.34 2021 - 10.09 @ 132.69 2022 - 10.13 @ 133.07 9.93 run - https://youtu.be/hII0_UlYM4U |
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