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#1
05-26-2026, 11:48 AM
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| The Following User Says Thank You to 73ta For This Useful Post: | ||
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#2
05-29-2026, 08:04 PM
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Quote:
__________________
1967 Firechicken, 499", Edl heads, 262/[email protected]" duration and 0.627"/0.643 lift SR cam, 3.90 gear, 28" tire, 3550#. [email protected] mph with a 1.45 60'. Still WAY under the rollbar rule. |
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#3
05-25-2026, 09:16 PM
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Back in the 80s I had a local exhaust shop make some exhaust for my 70 gto. I put on some ram air manifolds and I had a set of log manifolds. I think the outlet on the logs were smaller than the ram airs. He looked it up in his book for all the factory bend angles and stuff. I remember him telling me his book said to use 2" pipe and expand the end to fit the 2.25' outlets. He said it would be better just to use 2.25" pipe ..it would give me more power and I agreed.
Fast forward 40 years....The 3" pipes must be a improvement even though its necked down on the end. Im trying to keep a stockish look under the hood thats why I still have iron heads, intake and exhaust.
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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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#4
05-26-2026, 03:28 AM
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So.................... what did the dyno say ?
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| The Following User Says Thank You to Dragncar For This Useful Post: | ||
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#5
05-31-2026, 10:13 AM
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Jay I have not but I have seen some "generous" dynos that the motor never "ran the number" by the wt/mph on the car. The "stingy' Stuska we used on my 455 pump gas in my TA was below what the calculators say. 525 on the dyno 124 MPH weighing 3750. 587 on Wallace calculator. Pump gas and a Torker II not a Northwind!
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Skip Fix 1978 Trans Am original owner 10.99 @ 124 pump gas 455 E heads, NO Bird ever! 1981 Black SE Trans Am stockish 6X 400ci, turbo 301 on a stand 1965 GTO 4 barrel 3 speed project 2004 GTO Pulse Red stock motor computer tune [email protected] 1964 Impala SS 409/470ci 600 HP stroker project 1979 Camaro IAII Edelbrock head 500" 695 HP 10.33@132 3595lbs 1964 Corvette Coupe 327 4 speed |
| The Following User Says Thank You to Skip Fix For This Useful Post: | ||
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#6
06-03-2026, 11:36 PM
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After watching vid pretty impressive.
Questions. Hand ported heads. Intake and exhaust. No flow #s. His pontiac guy Steve gave no basic cam specs. Understand but really l I me lsa. 40 yrs after trying 108-110-113 looking try 116-118.
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If you cant drive from gas pump to gas pump across the map, its not a street car. http://s207.photobucket.com/albums/b...hop/?start=100 |
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