GM SP350 357 cam?
Thread Starter
Le Mans Master
Joined: Oct 2002
Posts: 7,098
Likes: 378
From: Las Vegas - Just stop perpetuating myths please.
GM SP350 357 cam?
Any feedback from users of the GM SP350 357 cam part number 12677151? Looks like a drop in swap for an stock LT1 or stock vortec heads with stock springs. Specs look like its a LT4 Hot Cam little brother.
Better late than never but I wish GM was selling that came when I bought my car.
Just wondering if any is running it and would like to share what they think of it here.
Better late than never but I wish GM was selling that came when I bought my car.
Just wondering if any is running it and would like to share what they think of it here.
2nd Gear
Joined: Jul 2017
Posts: 2
Likes: 0
SP350 357 Crate Engine
I recently purchased the SP350 357 crate engine for my 69 Camaro. I had it broken-in on a dyno before having it shipped. I purchased it from Pace Performance and am very happy with their service. The dyno test proved 386Hp @ 5600 RPM and 419 lb torque @ 4100 RPM. I have about a 1,000 miles now on the motor and am very pleased with how smooth it runs in traffic and how strong it pulls when the secondaries open up. It came with HEI ignition but I recently changed to MSD. It's much happier with MSD. Hope this helps
Thread Starter
Le Mans Master
Joined: Oct 2002
Posts: 7,098
Likes: 378
From: Las Vegas - Just stop perpetuating myths please.
Thanks for sharing. That's some nice power for a reasonable price. What I'm looking for is a direct cam swap w/o changing valve springs on an LT1 Gen II motor. Should be a great match and save a lot of $$ and effort by using stock LT1 springs. Something the GEN II LT1's have had less than 2 choices.
Cool you got a great deal on a good performance motor.
Cool you got a great deal on a good performance motor.
Burning Brakes
Joined: Oct 2009
Posts: 1,066
Likes: 57
I recently purchased the SP350 357 crate engine for my 69 Camaro. I had it broken-in on a dyno before having it shipped. I purchased it from Pace Performance and am very happy with their service. The dyno test proved 386Hp @ 5600 RPM and 419 lb torque @ 4100 RPM. I have about a 1,000 miles now on the motor and am very pleased with how smooth it runs in traffic and how strong it pulls when the secondaries open up. It came with HEI ignition but I recently changed to MSD. It's much happier with MSD. Hope this helps
Could you please describe the 350/357's idle quality? Will it be the same, smooth-as-glass idle, as my stock 350/270? Or will be slightly lumpy, while idling at a red light?
Thanks
