[jwhit]

Originally Posted by Jay S

Off the shelf cams…Best bang for the buck, not the most powerful, but very good, IMHO is the summit 2802.

If you want a little rougher idle and still have decent street manors, with more top end power than the 2802, that describes the Crower 60243. Personally I would pick it over the 2802.

The 703 Lunati will be fairly comparable to the Crower 60243 for street manors. The 703 will have a stronger and broader mid range, and in my opinion the most fun to drive, strongest power everywhere for something off the self……

But for overall pump gas tolerance, with those domed pistons, needing a little smoother power for the sniper…. I would pick Crower 60243 over the 703. All three of those choices are outstanding cams in 400s.

To mimic the top end power of the Lunati 703 on the computer program I think you will have to retard it 4* (110)on your program. If you want to see how it compares on tq try 106. I have found that represents more how it is ground. The computer program sees it as a symmetrical profile, and will not represent the top end the voodoo and Ultradyne cams have very well..

so the crower243 would be best pick from thee 3 cams? one last cam to look at butler sugested this one
Butler/Comp SP Street Performance Cam, Hyd FT, 274/286, 230/236, .488/.491, 112 Hyd CCA-BP6014SP

[Jay S]

I don’t like Bulter’s 6014 cam in your combo. For starters you do not have enough spring pressure. Second it lays over early and does a poor job at making HP with Poniac’s 3O* intake valves, it needs 45* valves. It is also usually really noisy compared to other cams and it is pretty hard on the valve terrain, and doesn’t wear all that great. It is more aggressive than the voodoo’s, it is a XE 274 widened out to 112 LCA with the intake profile tweaked to get a little more lift.

I’d pick the Crower 60243 if your tuning skills are a concern with your sniper. I think it will be friendlier with your domed pistons.. If tuning is not a concern I would pick the Lunati 703. It might come down to what is available right now.

[jwhit]

Originally Posted by Jay S

I don’t like Bulter’s 6014 cam in your combo. For starters you do not have enough spring pressure. Second it lays over early and does a poor job at making HP with Poniac’s 3O* intake valves, it needs 45* valves. It is also usually really noisy compared to other cams and it is pretty hard on the valve terrain, and doesn’t wear all that great. It is more aggressive than the voodoo’s, it is a XE 274 widened out to 112 LCA with the intake profile tweaked to get a little more lift.

I’d pick the Crower 60243 if your tuning skills are a concern with your sniper. I think it will be friendlier with your domed pistons.. If tuning is not a concern I would pick the Lunati 703. It might come down to what is available right now.

thanks again for the help and input

[Jay S]

Since cams are really hit and miss for being available right now here is another cam that is worth looking at from compcams,
the 280 H magnum. It would idle rougher than the 60243 or the 703 Lunati. Not quite as rough as the 2822 summit, but much more explosive mid range than that 2822 and good top end power with how your combo is set up.

https://www.summitracing.com/parts/c...ntiac#overview

[jhein]

Originally Posted by tom s

The 041 was only avail from the factory with 3.90-4.10 gears for a reason.In a 400 it kills low end.2802 would be better.Tom

Didn't the '70 RAIV TAs have a 3.73?

[jwhit]

Originally Posted by Jay S

Since cams are really hit and miss for being available right now here is another cam that is worth looking at from compcams,
the 280 H magnum. It would idle rougher than the 60243 or the 703 Lunati. Not quite as rough as the 2822 summit, but much more explosive mid range than that 2822 and good top end power with how your combo is set up.

https://www.summitracing.com/parts/c...ntiac#overview

i look at that and summitt has another cam 1803 thats a close match to that

[Jay S]

The 1803 on the summit site says special order, that might be a bad sign for availability. You’d likely be happier with the 280H Compcams, it is a little bigger and more aggressive. Looking at the specs listed I think the Summit 1803 is probably symmetrical grind, or close to symmetrical. Which is ok, and I could be wrong, I have not had the 1803. My preference over the 1803 would be the 280H comp, it is assymetrical grind using their magnum lobes, less aggressive than an XE cam, and more like the Voodoo and Ultradyne cams.

[jwhit]

Originally Posted by Jay S

The 1803 on the summit site says special order, that might be a bad sign for availability. You’d likely be happier with the 280H Compcams, it is a little bigger and more aggressive. Looking at the specs listed I think the Summit 1803 is probably symmetrical grind, or close to symmetrical. Which is ok, and I could be wrong, I have not had the 1803. My preference over the 1803 would be the 280H comp, it is assymetrical grind using their magnum lobes, less aggressive than an XE cam, and more like the Voodoo and Ultradyne cams.

would that comp be better than the summitt 2802 dur 298/303

[Vid]

Originally Posted by jwhit

would that comp be better than the summitt 2802 dur 298/303

The 2802 has a 114 lobe separation where the Comp has a 110. The 114 might help ward off detonation if that is a concern.

My other advice is when it comes to cams, don’t grasp at straws on what’s available or what the price is. If you haven’t already, write down all the pertinent info about your combo from carb size to compression ratio to gearing, then contact someone like Tim Goolsby at Bullet. I paid around $225 for my custom ground cam, where most “off the shelf” cams run $180-$200. Money well spent IMHO.





Sent from my iPhone using Tapatalk

[Jay S]

Originally Posted by jwhit

would that comp be better than the summitt 2802 dur 298/303

280H will be a little bigger cam than the 2802, more like the 703 Lunati, with the strong mid range. Especially with headers. I don’t recall what you planned for the exhaust, but if you have RA manifold or logs manifolds it would still have more midrange power, but it probably won’t have any more top end power than the 2802. Much rowdier idle though. With exhaust manifolds it would fall short Lunati 704 or the 60243 Crower, but probably not by a lot.

Single pattern cams aren’t all that popular in Pontiacs. But they do pretty well on power as long as they are large enough cams. I have usually been able to get little better fuel economy with single pattern cams like the 280H versus these other cams with more duration on the exhuast. I have a single pattern 230, .48” in one of my cars. I use to use single pattern cams in dirt track stock cars, like the car photo in my avitar. They seemed to come out of the corners harder. As your are probably figuring out by different comments, different cams make compromises. Part throttle efficiency at 2500 rpm the 280H holds it’s own pretty well considering it’s fairly rowdy idle. If you wanting the idle sound of the RA4, the 280H will come pretty close.

[Jay S]

I think a flat tappet at Bullet is going to be closer to $260 right now with shipping. The cam cores have went up quite a bit. They are by far my favorite company to work with.

IRC, one of the members here, JLMounce ran a comp 280H for a while on his car. I think he had a fuel injection too. He’d be a good one to ask how that combo worked for him. I believe he was running a 455 and iron heads at the time.

[jwhit]

Originally Posted by Jay S

I think a flat tappet at Bullet is going to be closer to $260 right now with shipping. The cam cores have went up quite a bit. They are by far my favorite company to work with.

IRC, one of the members here, JLMounce ran a comp 280H for a while on his car. I think he had a fuel injection too. He’d be a good one to ask how that combo worked for him. I believe he was running a 455 and iron heads at the time.

good advice thanks again for all the input

[blueghoast]

You can buy a Mellings 041 cam at auto zone for around $125.00.

GT