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#1
06-10-2024, 08:23 PM
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Cam for 70 GTO 4 speed
I bought a Mint Turquoise original WT 4 speed 70 GTO back in 2012. It was a one owner car for the majority of its life. A guy in California bought it and spent a bunch of money on it that it probably didn’t need. He rebuilt the motor and installed a Comp Cams 255 Dual Energy cam in it. I kept the car for 10 years and sold it to my buddy about 18 months ago. I always wanted to change the cam and put ram air and ram air exhaust manifolds on the car. I bought the car back and called Ames about the ram air manifolds. They said they should have them in 4-6 weeks. I am thinking about using an 068 or a Summit 224/234 cam in it. I had the Summit cam in a 69 GTO with a stall converter and it was one of the hardest running Pontiacs I ever had. The 255 Dual Energy cam has a lot of low end but it runs out of breath. It has no top end. It is basically a tractor engine. What do you recommend? It has 3.23 rear gears and AC. Also where can I buy the good Johnson lifters?
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#2
06-10-2024, 08:41 PM
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I would consider the 068 high-lift (summit 2801). Crowed 60916 or summit 2802. For near stock but better use the 2801 with good lifters. Don’t trust the summit lifters. I got mine from Spotts and they settled in perfectly.
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#3
06-10-2024, 08:46 PM
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I just bought my lifters from Butler.
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 71' GTO -original 400/4-speed/3.23 posi 13.95 @ 102.1 on street tires @ 4055lbs. ‘63 LeMans- ‘69 400 w/ original transaxle. 2.69 gears. |
| The Following User Says Thank You to 67drake For This Useful Post: | ||
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#4
06-10-2024, 09:17 PM
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If you can stand a little noise while realizing your engine is healthy this is where a set of Rhoads lifters would come in handy they would reduce duration and overlap at clutch release RPMs to cope with the slight loss of low end torque from the 2802 camshaft, just like the stall converter helped in that area with the automatic
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If your not at the table you're on the menu A man who falls for everything stands for nothing. |
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#5
06-13-2024, 12:00 AM
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I think the 2801 is probably the best choice for this car as I don’t want to lose low speed drivability.
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#6
06-13-2024, 07:04 AM
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Where the valve springs changed by the guy in Ca when he rebuilt the motor?
__________________
Wernher Von Braun warned before his retirement from NASA back in 1972, that the next world war would be against the ETs! And he was not talking about 1/8 or 1/4 mile ETs! 1) 1940s 100% silver 4 cup tea server set. Two dry rotted 14 x 10 Micky Thompson slicks. 1) un-mailed in gift coupon from a 1972 box of corn flakes. Two pairs of brown leather flip flops, never seen more then 2 mph. Education is what your left with once you forget things! |
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#7
06-13-2024, 10:10 PM
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I think so. I need to look through the paperwork and verify that.
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#8
06-14-2024, 06:42 AM
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Quote:
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1977 Black Trans Am 180 HP Auto, essentially base model T/A. I'm the original owner, purchased May 7, 1977. Shut it off Shut it off Buddy, I just shut your Prius down... 
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#9
06-14-2024, 10:50 AM
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Quote:
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Tim Corcoran |
| The Following User Says Thank You to Tim Corcoran For This Useful Post: | ||
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