Posted By: lewtot184
summit cam? - 06/10/13 06:02 PM
anybody use the big summit cam with cast iron hipo exhaust manifolds? whats the verdict?
summit cam?
Posted By: Mr.Yuck
Re: summit cam? - 06/10/13 06:06 PM
works well, 12.90 in a 67 coronet, 9:1 (maybe) 440, 906 heads, RPM intake, 750DP, cheapo headers, 175k convert (2800) and 3.91's. Good cam.
Posted By: Silver70
Re: summit cam? - 06/10/13 06:30 PM
I used one in a 413 for my challenger... however the car hasn't left the driveway yet 
I bought it for under 100 on sale. I know there are better cams out there, but hard to beat the price.
I bought it for under 100 on sale. I know there are better cams out there, but hard to beat the price.
Posted By: JohnRR
Re: summit cam? - 06/10/13 06:35 PM
Quote:
anybody use the big summit cam with cast iron hipo exhaust manifolds? whats the verdict?
Posted By: VincentVega
Re: summit cam? - 06/10/13 06:37 PM
I would think if running manifolds you'd want a split with a bias on exhaust duration. The brand isn't going to make a difference so much as the cam timing that you get.
Does a summit mopar grind give you a profile that works with the bigger mopar lifter? many don't, and you lose a bit.
Does a summit mopar grind give you a profile that works with the bigger mopar lifter? many don't, and you lose a bit.
Posted By: Mr.Yuck
Re: summit cam? - 06/10/13 07:01 PM
Quote:
I would think if running manifolds you'd want a split with a bias on exhaust duration. The brand isn't going to make a difference so much as the cam timing that you get.
Does a summit mopar grind give you a profile that works with the bigger mopar lifter? many don't, and you lose a bit.
what? the cam comes with lifters....
AND FWIW 3 friends have run the same cam w/ logs and had good results.
Posted By: JohnRR
Re: summit cam? - 06/10/13 07:22 PM
Quote:Quote:
I would think if running manifolds you'd want a split with a bias on exhaust duration. The brand isn't going to make a difference so much as the cam timing that you get.
Does a summit mopar grind give you a profile that works with the bigger mopar lifter? many don't, and you lose a bit.
what? the cam comes with lifters....
AND FWIW 3 friends have run the same cam w/ logs and had good results.
You can buy it without lifters, I bought 2 last month on sale 57 each.
I was going to run it with a 383 but decided it wasn't the best choice for this one.
To answer the other question , I doubt it was ground to take advantage of the mopar .904 lifter.
Posted By: lewtot184
Re: summit cam? - 06/10/13 08:29 PM
Quote:pretty sure its a crane profile, hp280/hp290. looking at trying to bleed a little cylinder pressure with the extra duration and wider LSA vs the mopar 272-.455.Quote:Quote:
I would think if running manifolds you'd want a split with a bias on exhaust duration. The brand isn't going to make a difference so much as the cam timing that you get.
Does a summit mopar grind give you a profile that works with the bigger mopar lifter? many don't, and you lose a bit.
what? the cam comes with lifters....
AND FWIW 3 friends have run the same cam w/ logs and had good results.
You can buy it without lifters, I bought 2 last month on sale 57 each.
I was going to run it with a 383 but decided it wasn't the best choice for this one.
To answer the other question , I doubt it was ground to take advantage of the mopar .904 lifter.
Posted By: GTX MATT
Re: summit cam? - 06/10/13 08:38 PM
With that LSA and those duration numbers I always thought that cam would be ideal for something with manifolds looking for a good kick, especially with decent induction. Intake lobe isn't much different than your 272/272 @ .050 (compared to the actual reported numbers on the 272/272) though from the looks of it, just a tad more lift.As I recall you were going low low 13s with that 272/272, weren't you?
I don't know if it will bleed off significantly more cylinder pressure, the advertised numbers are a bit more but Mopar is probably lying about those also. I know that 272 is reportedly a true 224 @ .050.
You could always retard the 272 a bit. Then again for 110 bucks its probably worth a try. Let us know how it works compared to that 272 if you do try it.
I don't know if it will bleed off significantly more cylinder pressure, the advertised numbers are a bit more but Mopar is probably lying about those also. I know that 272 is reportedly a true 224 @ .050.
You could always retard the 272 a bit. Then again for 110 bucks its probably worth a try. Let us know how it works compared to that 272 if you do try it.
Posted By: dogdays
Re: summit cam? - 06/10/13 10:08 PM
Fact is, all Summit lobes are generic Chevy lobes. Period.
Will the engine run with the Summit cam? Certainly.
Will the engine make more power than with a stock camshaft? Probably.
Will a camshaft with the same events but with "real Chrysler" lobes make more power? Certainly.
The camshaft is the brain of the engine. I cannot see the advantage in saving the equivalent of one or two tanks of gas and getting a less-than-optimum camshaft.
Now, if one is willing to sacrifice performance for a camshaft that uses lighter springs and has lazier lobes that will most likely never wear out, then the Summit or other generic camshafts are for you.
R.
Will the engine run with the Summit cam? Certainly.
Will the engine make more power than with a stock camshaft? Probably.
Will a camshaft with the same events but with "real Chrysler" lobes make more power? Certainly.
The camshaft is the brain of the engine. I cannot see the advantage in saving the equivalent of one or two tanks of gas and getting a less-than-optimum camshaft.
Now, if one is willing to sacrifice performance for a camshaft that uses lighter springs and has lazier lobes that will most likely never wear out, then the Summit or other generic camshafts are for you.
R.
Posted By: 72d100
Re: summit cam? - 06/10/13 11:12 PM
i have the bigger summit cam in my 400. it seems decent for the price. i would prefer a real mopar cam like a whiplash but its what i could afford when i built the motor in highschool
Posted By: lewtot184
Re: summit cam? - 06/10/13 11:48 PM
i wondered how long it would take for this to go sour,... 
.
.
Posted By: Mr.Yuck
Re: summit cam? - 06/10/13 11:50 PM
Quote:
Fact is, all Summit lobes are generic Chevy lobes. Period.
Will the engine run with the Summit cam? Certainly.
Will the engine make more power than with a stock camshaft? Probably.
Will a camshaft with the same events but with "real Chrysler" lobes make more power? Certainly.
The camshaft is the brain of the engine. I cannot see the advantage in saving the equivalent of one or two tanks of gas and getting a less-than-optimum camshaft.
Now, if one is willing to sacrifice performance for a camshaft that uses lighter springs and has lazier lobes that will most likely never wear out, then the Summit or other generic camshafts are for you.
R.
blah blah blah the summit cam ran circles around the MP 484 cam that was in my car 1st.... it had a much better (usable) power band, was much more "driver friendly" and I didn't need to use and expensive converter.
Posted By: therocks
Re: summit cam? - 06/11/13 01:01 AM
Ive ran all of their cams.they all worked well.Its not a full race cam but it does work very well.One I bought in the 80s is still running in a 383.I agree the big cam works better than a MP of the same size.Last 3 I bought had Crane instructions and lube.Rocky
Posted By: d-150
Re: summit cam? - 06/11/13 01:05 AM
whats bad about the summit cam it is not optimal with chrysler lobes(max pwr)whats good about the summit cam is makes good performance and not hard on valvetrain
Posted By: dogdays
Re: summit cam? - 06/11/13 01:20 AM
Adding fuel to the fire...So a Summit cam ran circles around a 484 cam...big deal.
This is just one more example of a smaller cam outperforming a larger (too large) cam in a real situation.
My point was, and still is, that given EXACTLY the same valve opening and closing points as the Summit cam, a cam with quicker opening and closing rates will make more power. Dulcich's article several years ago quantified this idea... And yes, a better cam than the Summit can be had for not more extra than the price of two tanks of gas.
I'm not being sour, I've built a few ultra-low-buck cars in my day. But the insane price of fuel makes some of the items that used to be "more expensive", now seem not so much.....
Plus, if one is really interested in saving dollars, Bullet's $60.00 regrind price for a hydraulic flat-tappet cam is very cheap, and will probably result in a better fit. Or you could buy one of their stocked cams for $88.00, either the 256 or the 268 ground on 111LSA.
I don't know those guys, have no ulterior motives, but am suggesting that there are other low-dollar alternatives to the Summit cams.
R.
This is just one more example of a smaller cam outperforming a larger (too large) cam in a real situation.
My point was, and still is, that given EXACTLY the same valve opening and closing points as the Summit cam, a cam with quicker opening and closing rates will make more power. Dulcich's article several years ago quantified this idea... And yes, a better cam than the Summit can be had for not more extra than the price of two tanks of gas.
I'm not being sour, I've built a few ultra-low-buck cars in my day. But the insane price of fuel makes some of the items that used to be "more expensive", now seem not so much.....
Plus, if one is really interested in saving dollars, Bullet's $60.00 regrind price for a hydraulic flat-tappet cam is very cheap, and will probably result in a better fit. Or you could buy one of their stocked cams for $88.00, either the 256 or the 268 ground on 111LSA.
I don't know those guys, have no ulterior motives, but am suggesting that there are other low-dollar alternatives to the Summit cams.
R.