Forum: 70-73 Firebird & TA TECH
Today, 08:32 PM
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Replies: 433
Views: 105,095
Mike, we haven't checked the cylinders yet for...
Mike, we haven't checked the cylinders yet for roundness, but that's a great idea to measure them. The cylinder pressure was pretty good for a 54 year old engine at 175 - 185 psi, with one outlier at...
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Forum: 70-73 Firebird & TA TECH
Today, 07:36 PM
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Replies: 433
Views: 105,095
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Forum: 70-73 Firebird & TA TECH
Today, 07:34 PM
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Replies: 433
Views: 105,095
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Forum: 70-73 Firebird & TA TECH
Today, 05:01 PM
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Replies: 433
Views: 105,095
Hey Craig! We've taken many 400 blocks to .030...
Hey Craig! We've taken many 400 blocks to .030 and .040 over without problems...maybe a block or 2 to .060 over without issue either. These were all earlier pre-557 block castings. If you need to go...
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Forum: 70-73 Firebird & TA TECH
Today, 01:16 PM
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Replies: 433
Views: 105,095
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Forum: 70-73 Firebird & TA TECH
Today, 12:57 PM
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Replies: 3
Views: 84
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Forum: 70-73 Firebird & TA TECH
Today, 07:59 AM
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Replies: 433
Views: 105,095
Mike & John, Nope, no audible detonation and...
Mike & John, Nope, no audible detonation and nothing on the plugs (molten aluminum). Now, I did drive it gently the only trip it went on (to the 2021 TA Nats...maybe 700 miles round trip). The soft...
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Forum: 70-73 Firebird & TA TECH
Yesterday, 07:57 PM
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Replies: 433
Views: 105,095
RAIII Rebuild Update
Dan tore down the YZ RAIII engine today and found it to be very clean inside from excellent care the past 54 years and that it had never been opened up before. It had factory intake manifold gaskets,...
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Forum: 69-71 Judges only TECH
06-14-2024, 10:24 AM
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Replies: 8
Views: 397
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Forum: 70-73 Firebird & TA TECH
06-10-2024, 12:52 PM
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Replies: 433
Views: 105,095
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Forum: 69-71 Judges only TECH
06-09-2024, 07:32 PM
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Replies: 8
Views: 397
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Forum: 70-73 Firebird & TA TECH
06-09-2024, 07:22 PM
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Replies: 433
Views: 105,095
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Forum: 70-73 Firebird & TA TECH
06-08-2024, 11:42 AM
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Replies: 433
Views: 105,095
I need to make a correction in my earlier...
I need to make a correction in my earlier post...the magazine was High Performance Pontiac (HPP), not Pontiac Enthusiast (sorry Don) as I stated. Dan built that 455 to '71 455HO specs (block is a YC...
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Forum: 70-73 Firebird & TA TECH
06-08-2024, 11:29 AM
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Replies: 433
Views: 105,095
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Forum: 70-73 Firebird & TA TECH
06-08-2024, 11:26 AM
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Replies: 433
Views: 105,095
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Forum: 70-72 GTO Tempest & LeMans TECH
06-08-2024, 10:53 AM
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Replies: 3
Views: 207
Mike, I'm seeing a "C" hiding under the 'E'...
Mike, I'm seeing a "C" hiding under the 'E' now...Roger pointed out the "3" at the start of the 6-digit sequential number is usually reserved for B--bodies, so a second strike against it being a true...
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Forum: 70-72 GTO Tempest & LeMans TECH
06-08-2024, 08:40 AM
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Replies: 3
Views: 207
455HO Question for the PY Family
The 455HO that is temporarily going in the ’70 Formula has ’71 197 heads, but the block is a ’72 YE 455 (J201 casting date) which, according to the ’72 service manual, is for a ’72 F-body 455HO...
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Forum: 70-73 Firebird & TA TECH
06-08-2024, 08:28 AM
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Replies: 433
Views: 105,095
RAIII Engine Rebuild Time
We finally got the time (and the inspiration) to pull the RAIII 400 out of the Formula. It developed a slight bottom end knock when coming back from the 2022 TA Nationals and been parked since then....
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Forum: THE LOBBY
06-08-2024, 07:49 AM
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Replies: 645
Views: 47,567
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Forum: 67-92 Firebirds & Trans Ams FOR SALE
05-28-2024, 12:49 PM
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Replies: 15
Views: 1,155
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Forum: 69-71 Judges only TECH
05-27-2024, 12:55 PM
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Replies: 13
Views: 3,774
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Forum: Pontiac - Street
05-12-2024, 03:00 PM
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Replies: 32
Views: 1,904
Skip,
From what I've seen/read/heard the...
Skip,
From what I've seen/read/heard the maximum flow from high compression small valve (1.96"/1.66") heads from '68 to '70 flow roughly 190/145 cfm; the '68 to '70 large valve D-port head all...
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Forum: Pontiac - Street
05-12-2024, 11:34 AM
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Replies: 32
Views: 1,904
With the untouched 455HO 197 heads (8.60 to 1...
With the untouched 455HO 197 heads (8.60 to 1 SCR)and factory top end (aluminum intake with crossover, 7041263 Q-jet, factory RA exhaust manifolds (with the puny 2.1” outlets) on the same ’70 YH code...
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Forum: Pontiac - Street
05-11-2024, 06:30 PM
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Replies: 32
Views: 1,904
Dan had the 2800 cam sitting on a shelf for...
Dan had the 2800 cam sitting on a shelf for several years and since this was, more or less, a stock style rebuild, he decided to throw it in. The 6X-4 heads are totally stock, except for the new...
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Forum: Pontiac - Street
05-11-2024, 02:02 PM
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Replies: 32
Views: 1,904
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