bosco022

My original 64 327 block is getting rebuilt with forged rods & pistons, (331 ci) heads will be Trick Flow twisted wedge heads (ported) and about 10.5 compression. I was gonna install the Comp Nostalgia plus 350 HP cam 468 229/236 112 but have a perfectly good Comp 280 H .480 230/230 on a 110. From the numbers it seems they would be pretty close. Anybody used one in a 327 build?

Car does not have power brakes but does have vintage air.

Avispa

Never used one on a small block, but on big blocks, my experience with Comp Magnum cams is not good. I used one of their Nostalgia Plus LS6 cams in my 427 for comparison. It ran ok, but gawd was it noisy. As in I never heard a solid lifter cam make so much noise. The Magnum cam had a horrible idle, and I had to rev it a bit and slip the clutch to get rolling from a dead stop. With a 427 in a flyweight Corvette. Um, no. That's not supposed to happen. To be fair that was the 292H grind, but taking a guess on what the 280H would be like with 100 fewer CIs, you probably will be close to the same boat. I had better luck with their XE274 hydraulic, but in the end went to a Crane solid close to L72 cam specs. Comp tends to grind their cams with too-close lobe separation. They may make good power but their street manners leave a lot to be desired. I'd find something else.

bosco022

Thanks for responding

Robert61

The 280 will be fine as long as you don't have PB or an automatic with a stock converter. If I'm going the performance route in a street engine I like to use around 230/240 in/ex.

bosco022

It has the Richmond super T10 close box 2.43 first gear. 3.36 rear end and I plan to use the lightweight Z28 flywheel 13 lbs

SWCDuke

...too much overlap and duration... poor idle quality... you'll have to idle it at over 1000 to keep it idling with the compressor engaged, and it probably needs stiffer than OE valve springs, which puts the lobes in jeopardy. The XE series is famous for wiping lobes. With high flowing heads you don't need that much cam. A plain old Federal Mogul L-79 cam or L-82 cam installed four degrees advanced will give a reasonable idle (L-82s could be had with AC) decent low end torque, and if you did the heads right and set up OE replacement valve springs right it will make useable power to at least 6500.

Duke

Robert61

I would stay with a heavier flywheel. The OP may want his car to sound like it has a cam. In order to do that well it has to have more duration. My GTO idles smooth as glass, LS1 with an LS3 cam. For my 61 my wife wants it to have a lope. I went with 230/236 112.


The 280 is one of my favorite street cams. The 268 is toooooooo small and the 292 approaches race trim.

bosco022

[QUOTE=SWCDuke;1600983656]...too much overlap and duration... poor idle quality... you'll have to idle it at over 1000 to keep it idling with the compressor engaged, and it probably needs stiffer than OE valve springs, which puts the lobes in jeopardy. The XE series is famous for wiping lobes. With high flowing heads you don't need that much cam. A plain old Federal Mogul L-79 cam or L-82 cam installed four degrees advanced will give a reasonable idle (L-82s could be had with AC) decent low end torque, and if you did the heads right and set up OE replacement valve springs right it will make useable power to at least 6500.

The car now has a 383 with the 280 and it is pretty mild. Things will change with a 327 though. Now it idles fine at 800. The comp version of the 350 HP cam is almost as big, a bit more duration on the exhaust. The car will only get driven about 2K a year. My goal was 400 HP

bosco022

alblosser

I have run the 280 cam in a 327 bored 30 over to 331 ci . It was great with a 4 speed, but I wouldn't recommend it with an automatic, even with a high stall converter. Not so much torque at low rpm, but comes on strong above 3500 rpm. It will have a lope. I used it with stock valve springs and had no problems with it.

bosco022

Thanks, mine will also be 331. Even the old L79 cam was a bit weak on the bottom. What gear did you have ?

alblosser

In that car I had a 3:90 gear. I would go with a 3:70 to 4:11 You ight be OK with a 3:55 but I wouldn't go any higher. Just my opinion.

vettsplit 63

I ran this cam with the Crane bleed down lifters in a 10-5 to 1 355 with Dart II Sportsman heads, Z28 intake, a 750 double pumper, Hooker headers and a turbo 350 with a Vega converter and 4.56 gears in a 66 Nova. it had a decent idle because of the lifters, and it would eat most street driven cars not set up with a good combo for lunch...... Ran 12.99 with slicks.

Stan's Customs

The Comp Cam LS6 Plus has a lot tighter lash than the original LS6 cam., .012/.012 if I recall.
If you set it a stock specs...it probably would be noisy.

John 66 Vette

I have the Comp. 280 in my L-79. 10.0 compression.Comp roller rocker tips. Built the motor in 1986, still runs strong. Love the lope

smd001

I ran the 280H in a 350 with double humps and single plane torker years ago (circa 1987-90). 3400lb 78' Malibu with T350, 2800 stall and 3:73's. Was my daily to work, college, weekend street racing and grudge racing at KCIR every Wed. It ran 13.0's @ 104mph and 12.0's @ 113 with a power shot. I thought it was a good choice at the time and very reliable.

bosco022

I am thinking a solid 400 HP with the ported trick flows and at about 3000 lbs should be pretty stout.