ClassicOldsmobile.com - Racing and High Performance

Oldsmobile for HPDE roadracing

Az697175 — Sat, 16 May 2026 21:01:22 GMT

Stumbled across this older thread as I was researching Olds machinery for hobbyist Roadracing. I currently run a '03 Corvette Z06 and notice the lack of Buick, Olds and Pontiac participants. Got me wondering what it would take (besides a significant amount of cash) to build a high reving small block Olds that could survive a track day of 3 or 4 sessions lasting 15 to 20 min at the 3000 to 6000 RPM range. A mid '80s Cutlass would be a good platform as there is a large amount of suspension and brake upgrades for the G-body. Any engine builders have any suggestions?https://classicoldsmobile.com/forums/general-discussion-33/olds-nascar-149936/

Good non return fuel pressure regulator?

olds 307 and 403 — Wed, 06 May 2026 21:46:25 GMT

The Carter mechanical fuel pump won't keep up with my new 358. I went to use an old Holley that I don't think I ever used. The 63 psi 350 LPH in tank pump pushed it to 15 psi on the lowest setting. Looking for good regulator that doesn't cost a fortune. Thanks in advance. Here is how I set up the 20 year old Holley regulator.

Smallblock header recommendation

Four4two — Tue, 05 May 2026 18:25:02 GMT

Shopping for headers for a 68-9 A-body with a 350. For street use, looking for decent quality, the best fit and preferable something coated. A search on Summit brings up endless Chevy applications even when specifying Olds. Thanks

330 Stroker (402ci)

cutlassefi — Sun, 03 May 2026 12:42:59 GMT

Just finished an EFI�d 330(1a block) Stroker build.
My 4.00� stroker crank
6.125 I beam rods
4.00� Racetec piston, 15cc dish, 9.75:1 comp
Out of the box new Edelbrock SB heads
Small hyd roller
Port matched RPM intake
Edelbrock TB
Holley Terminator Sequential EFI
Going in a �64 Vista Cruiser

462hp/491tq
Still modifying the brackets for the coils, but it runs REALLY well. This crank will transform a 330 the same way it does a 350!

Rocker Geometry - "Ford" Geometry vs Olds

olds70supreme — Thu, 30 Apr 2026 03:45:40 GMT

What roller rockers are correct for "Olds" heads, and how do you tell the difference (dimensions, specs, etc...)? This as opposed to the rockers based on or meant for Ford applications that are "close". What are the effects of using the Ford version vs one designed for Olds geometry. Are the effects only noticed for large-lift applications? Does the head (aka aftermarket heads (particularly the new Edelbrock 61035 heads) vs stock #5s) make a difference?

Thanks.

lifter preload

442man$ — Thu, 30 Apr 2026 02:05:00 GMT

I have a 455 my father built many years ago and was never run. I recently installed in my vista fired up and broke in cam. Valve train was a little noisy so i pulled valve covers. Thinking flat cam lobe all look fine but all of them have very little preload. It appears to have the comp cams roller rockers in it .Pushrod are 9.65 The problem is i cant get but 10 thousands preload before jam nut bottoms out on treads .This has 7/16 thread in head and 3/8 stud .I checked pushrod length and rocker is running right in center of valve. Cant seem to find shorter studs that size. This is on G heads. Any suggestion are appreciated.