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#1
09-15-2020, 09:57 PM
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Just freshened my 70' 455 a few months ago. 9.7-1 comp,stock port matched 70' iron intake,RA4 sized HFT cam,rhoads lifters,Cliff Qjet, #64 heads 254 cfm on the intake,1 3/4" headers. Dynoed 491 HP @ 5200 ,,, 570 lb trq. A stock iron intake is very capable.
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72 lemans,455 e-head, UD 255/263 solid flat,3.73 gears,,,10" 4400 converter,, 6.68 at 101.8 mph,,1.44 60 ft.2007 (cam 271/278 roller)9"CC.4.11gear 6.41 at 106.32 mph 1.42 60 ft.(2009) SOLD,SOLD 1970 GTO 455 4 speed #matching,, 3.31 posi.Stock manifolds. # 64 heads.A factory mint tuquoise ,69' judge stripe car. 8.45 @ 88.1 mph on slippery street tires.Bad 2.19 60ft.Owned since 86' |
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#2
09-16-2020, 07:20 PM
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Quote:
What cam exactly? |
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#3
09-17-2020, 08:01 AM
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Quote:
dyno video https://www.youtube.com/watch?v=-7vZwbCQlUw The furthest thing from "stock" on my engine are the heads cnc port job by SD performance.
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72 lemans,455 e-head, UD 255/263 solid flat,3.73 gears,,,10" 4400 converter,, 6.68 at 101.8 mph,,1.44 60 ft.2007 (cam 271/278 roller)9"CC.4.11gear 6.41 at 106.32 mph 1.42 60 ft.(2009) SOLD,SOLD 1970 GTO 455 4 speed #matching,, 3.31 posi.Stock manifolds. # 64 heads.A factory mint tuquoise ,69' judge stripe car. 8.45 @ 88.1 mph on slippery street tires.Bad 2.19 60ft.Owned since 86' Last edited by scott70; 09-17-2020 at 08:18 AM. |
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#4
09-17-2020, 09:24 AM
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Cliff is correct a factory iron intake can and do run well into the 9's.
Jay DeLaigle's 1974 Trans Am with his '455 FAST ENGINE' stroked to 501 cubic inches is a good example. Take note of the work performed to his intake.... 1974 Pontiac EGR cast iron intake, Ported and flowed by Wilson Manifolds with support from Jon Kasse racing engines and SD performance. Wilson Manifolds , top dogs in the intake modification industry. Pricey work I bet ! Cliff and Paul K comments are well taken, the RPM intake can shine above 500 hp.
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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) Best time 5.13 at 140 mph (1/8 mile) , true 10.5 tire, stock type suspension https://www.youtube.com/watch?v=qDoJnIP3HgE |
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#5
09-17-2020, 10:29 AM
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"After a successful season in 2000 with the new 473 engine and finding out what it's performance capability was with after market parts, Jim decided to revert back to a stock style cam and induction system."
"With that in mind, off came the the Edelbrock RPM intake, the Holley carb, and out came the Wolverine 234/244/112 LS camshaft." "Jim reinstalled his trusty 1969 Q-jet and modified the intake. Specifically, the intake runners were cleaned, straightened, and enlarged to standard gasket size for better airflow." "This performance level compared favorably to the events in 2000 with similar weather where the car ran in the 11.53 @ 115.5 range with 1.59 60' times." Jim Hand's Performance Changes in 2001 https://pontiacstreetperformance.com...ld455jh01.html .
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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) Best time 5.13 at 140 mph (1/8 mile) , true 10.5 tire, stock type suspension https://www.youtube.com/watch?v=qDoJnIP3HgE Last edited by Steve C.; 09-17-2020 at 10:36 AM. |
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