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Search took 0.06 seconds. Search: Posts Made By: SD455DJ
Forum: Pontiac - Street 07-13-2026, 07:17 PM
Replies: 32
Views: 6,359
Posted By SD455DJ
Here is the dyno session on a '78 W72 400 with...

Here is the dyno session on a '78 W72 400 with the Summit 2800 cam...

Dan had a good dyno session today with the W72 400. He rebuilt the original numbers matching engine with .040" over Icon...
Forum: 71-77 Ventura including 74 GTO TECH 07-08-2026, 06:43 PM
Replies: 20
Views: 3,559
Posted By SD455DJ
The Katech Whistler is an electronic device that...

The Katech Whistler is an electronic device that accurately measures an engine’s compression ratio without disassembling the engine.

The Whistler Compression Ratio Tester is designed to determine...
Forum: 71-77 Ventura including 74 GTO TECH 07-08-2026, 10:04 AM
Replies: 20
Views: 3,559
Posted By SD455DJ
This conversation has got me curious… For...

This conversation has got me curious…

For the 350 (354) and 400 engines with #11 heads to have the same advertised compression ratio of 8.80 to 1, the 350 heads would need to measure 77.2 cc’s and...
Forum: Pontiac - Street 07-05-2026, 06:54 PM
Replies: 51
Views: 1,611
Posted By SD455DJ
Quote: "I believe Cars magazine had a road test...

Quote: "I believe Cars magazine had a road test of a ’72 lemans GT with the L78 400, M-20 4-speed trans and a 3.55 Safety Track rear end and they got it down to 14.40’s at 99 mph in quarter mile...
Forum: 70-72 GTO Tempest & LeMans TECH 07-04-2026, 06:28 PM
Replies: 393
Views: 97,365
Posted By SD455DJ
Me too Mike...lol! Actually, it's been 11 1/2...

Me too Mike...lol! Actually, it's been 11 1/2 years since it came to Michigan...geesh! Tim, the body & paint man, is working slowly on the body work as it's been too hot up here lately. This is a...
Forum: Pontiac - Street 07-03-2026, 04:45 PM
Replies: 9
Views: 537
Posted By SD455DJ
Actually, the vacuum source is from the nipple...

Actually, the vacuum source is from the nipple screwed into the no. 1 intake manifold runner, not the vacuum tree behind the carb...thanks to Kenth's diagrams!

Dennis
Forum: 67-92 Firebirds & Trans Ams WANTED 07-01-2026, 06:17 AM
Replies: 65
Views: 20,479
Posted By SD455DJ
There have been a few since we allowed these cars...

There have been a few since we allowed these cars to race several years ago. I'd say at least 4 - '78/'79 W72 4-speed TA's, 1 - 403 '79 TA, and 4 - Z28's so far...as I recall.

According to Rocky's...
Forum: 67-92 Firebirds & Trans Ams WANTED 06-30-2026, 12:02 PM
Replies: 65
Views: 20,479
Posted By SD455DJ
I want an automatic W72 Formula for the pure...

I want an automatic W72 Formula for the pure stock drags...plus the fact that you just don't see them. The 4-speed cars seem to have a higher survival rate since they are more desirable to the...
Forum: Pontiac - Street 06-25-2026, 05:05 PM
Replies: 51
Views: 1,611
Posted By SD455DJ
The 250 net horsepower rating for the ’71 & ’72...

The 250 net horsepower rating for the ’71 & ’72 400 4-bbl is fairly accurate as installed in the vehicle after taking into account losses from internal frictions of the transmission and rearend,...
Forum: 70-72 GTO Tempest & LeMans TECH 06-25-2026, 01:21 PM
Replies: 5
Views: 992
Posted By SD455DJ
Should be 9799124 for all V8's. Dennis

Should be 9799124 for all V8's.

Dennis
Forum: 70-73 Firebird & TA TECH 06-25-2026, 01:14 PM
Replies: 6
Views: 569
Posted By SD455DJ
Very cool Formula 455HO Boardog! According to...

Very cool Formula 455HO Boardog! According to Fred Simmonds there were 321 455HO Formula's produced in 1971. Of this number 109 were ordered with Ram Air (I'm not sure where these numbers came from,...
Forum: 67-79 Big Pontiac TECH 06-22-2026, 01:48 PM
Replies: 25
Views: 2,714
Posted By SD455DJ
Here is a local '69 428HO Catalina with less than...

Here is a local '69 428HO Catalina with less than 30,000 miles all original still. It is owned by the nephews of the original owner, who also bought Dan's 455HO T-37 brand new to race in NHRA stock...
Forum: National Events 06-22-2026, 01:18 PM
Replies: 0
Views: 2,367
Posted By SD455DJ
2026 Pure Stock Muscle Car Drag Race

It's just three short months away for some great pure stock racing action at the Pure Stock Muscle Car Drag Races at Mid-Michigan Motorplex near Stanton, Michigan! Please see the PSMCDR website...
Forum: 70-72 GTO Tempest & LeMans TECH 06-12-2026, 06:34 PM
Replies: 393
Views: 97,365
Posted By SD455DJ
Refurbished the inner fender wells today...not...

Refurbished the inner fender wells today...not professional grade, but a little better than before.

Dennis
Forum: 70-72 GTO Tempest & LeMans TECH 05-28-2026, 08:39 AM
Replies: 393
Views: 97,365
Posted By SD455DJ
I sure hope it keeps moving along, lol! I've been...

I sure hope it keeps moving along, lol! I've been trying to finish this car for 10 years and it's always been interrupted! Tim does know his craft for sure. It looks like our cars are both in a...
Forum: 70-72 GTO Tempest & LeMans TECH 05-27-2026, 03:21 PM
Replies: 393
Views: 97,365
Posted By SD455DJ
Body Work Finally Started!

After a long winter and spring hiatus, Tim started panel work on the GT-37 a couple of weeks ago. Deer hunting was his focus back in November & December after the car was delivered to his shop, then...
Forum: Pontiac - Street 05-27-2026, 12:36 PM
Replies: 31
Views: 1,118
Posted By SD455DJ
Ponchomike57, I had a CC XE274 (230/236/110...

Ponchomike57,

I had a CC XE274 (230/236/110 @ .490”/,490”) in a ’71 455HO that was completely stock with 8.4 to 1 compression and it was a ‘turd’, especially with the M22/3.31 combo. We swapped it...
Forum: Pontiac - Street 05-25-2026, 11:28 AM
Replies: 31
Views: 1,118
Posted By SD455DJ
We’ve built several 400’s that are primarily for...

We’ve built several 400’s that are primarily for the street, but able to compete legally in the pure stock drags. The 3 that are shown are similar build-wise with forged rotating assemblies for...
Forum: THE LOBBY 05-02-2026, 04:45 PM
Replies: 11
Views: 352
Posted By SD455DJ
I'm guessing Pittsburg and Harrisburg... ...

I'm guessing Pittsburg and Harrisburg...

Dennis
Forum: Pontiac - Street 05-01-2026, 05:29 PM
Replies: 8
Views: 356
Posted By SD455DJ
Here’s another vote for the 2800 cam. My brother...

Here’s another vote for the 2800 cam. My brother rebuilt his ’78 W72 400 with 6X-4 heads from his Trans Am which is very similar to your ’71 400 with 96 heads. The 481988 block is 0.040” over with...
Forum: 67-92 Firebirds & Trans Ams WANTED 04-26-2026, 12:13 PM
Replies: 65
Views: 20,479
Posted By SD455DJ
Thanks for the info onetirefire! I just read in...

Thanks for the info onetirefire! I just read in Rocky Rotella's Firebird & Trans Am book that the '78 Formula (and TA) came with either the 4-speed or automatic standard (no-cost option) M21 when...
Forum: THE LOBBY 04-25-2026, 11:08 AM
Replies: 20
Views: 1,111
Posted By SD455DJ
I’ve used stock small valve 1970 #15 heads on a...

I’ve used stock small valve 1970 #15 heads on a YH 455 build that made 390 hp through log exhaust manifolds, stock cast iron intake & q-jet carb. It has a Summit 2802 cam. We had the press-in rocker...
Forum: 70-73 Firebird & TA TECH 04-18-2026, 04:41 PM
Replies: 16
Views: 414
Posted By SD455DJ
That radio is for a '75-up (??? unsure on exact...

That radio is for a '75-up (??? unsure on exact year) Firebird, so it would fit. The major difference is the Delco logo design and location as can be seen on the pics. This is a 1973 Firebird AM/FM...
Forum: Pontiac - Street 04-07-2026, 05:11 PM
Replies: 40
Views: 1,263
Posted By SD455DJ
As posted earlier by HFR, the '69 labels were...

As posted earlier by HFR, the '69 labels were silk-screened on early air cleaners and transitioned to the decal labels later in the year. My brother has a 56,000 original mile '69 350HO 4-speed...
Forum: Pontiac - Street 03-25-2026, 03:52 PM
Replies: 40
Views: 1,263
Posted By SD455DJ
Hey Roger! Welcome back! I never noticed that...

Hey Roger! Welcome back! I never noticed that raised 'band' that goes around the snorkel that matches the width of the heat stove on the bottom and the Auto-Therm AC actuator on the top before. It is...
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