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Forum: 70-72 GTO Tempest & LeMans TECH 02-21-2021, 06:23 PM
Replies: 339
Views: 69,745
Posted By scott70
Cant remember,,were those braces standard on...

Cant remember,,were those braces standard on manual cars? My gto still has them. I remember something about cross member issues without them?
Forum: 70-72 GTO Tempest & LeMans TECH 02-09-2021, 09:30 AM
Replies: 339
Views: 69,745
Posted By scott70
Looks like a good match!!

Looks like a good match!!
Forum: 70-72 GTO Tempest & LeMans TECH 05-26-2020, 10:40 AM
Replies: 339
Views: 69,745
Posted By scott70
Of course this is on a 490hp/570 trq motor. If it...

Of course this is on a 490hp/570 trq motor. If it were making more power ,the demand for better airflow/less restriction is needed and the differences would be larger I believe. Ive always been...
Forum: 70-72 GTO Tempest & LeMans TECH 05-25-2020, 09:16 PM
Replies: 339
Views: 69,745
Posted By scott70
We did not. Comparing dyno AFR and BSFC numbers...

We did not. Comparing dyno AFR and BSFC numbers between headers and manifolds the differences was very, very small. 19 hp and 6 ft.lb peak difference. Using my 7040267 carb by Cliff. Ive had people...
Forum: 70-72 GTO Tempest & LeMans TECH 05-24-2020, 09:35 PM
Replies: 339
Views: 69,745
Posted By scott70
I dynoed my # 64 headed 455 with 1 3/4" hooker...

I dynoed my # 64 headed 455 with 1 3/4" hooker headers and then switched to RA manifolds with 2.25 outlet dumping into 2.5" mandrel bent headpipes. About 18 HP and tq. difference.
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