Hot Cam!

[logan1080]

Ok what do you guys mean about a "hot cam"? Is this the name of an actual specific camshaft or is that just a general term for an after market performance camshaft?

[boxmonkeyracing]

Originally Posted by logan1080

Ok what do you guys mean about a "hot cam"? Is this the name of an actual specific camshaft or is that just a general term for an after market performance camshaft?

term for GMPP cam shaft. . .

[logan1080]

i just read up about it, sounds like a date to me. i also plan to have a guy i know to redo the computer on it. put the cam in and drive around with the laptop plugged in and squeeze out some more power.

[radz28]

I noticed there is no mention of compatibility, specifically, with a Gen. IV with L92-style heads. The reason I bring this up is because I believe I've heard that LS1/6-style cams aren't necessarily good for L92-style ports and such.

Example: Post #11

" A cam designed for an Ls1/Ls6 head with 80-90% Intake to exhaust efficency wil not be as effective on a head with a 60% I/E ratio like the Ls7 for instance. This is why the split on the ls7 is so large (20 degrees). Its not that exahust port is so bad on the L92 its that the intake port is so good..."

http://www.ls1tech.com/forums/showth...light=l92+cams

Again, I don't have experience regarding this subject, but I've read and have heard stories on other forums that earlier Gen. III cams don't completely play well with the Gen. IV goodies. I know I'd like to hear from anyone else who has any information

[smike07]

Originally Posted by radz282003

I noticed there is no mention of compatibility, specifically, with a Gen. IV with L92-style heads. The reason I bring this up is because I believe I've heard that LS1/6-style cams aren't necessarily good for L92-style ports and such.

Example: Post #11

" A cam designed for an Ls1/Ls6 head with 80-90% Intake to exhaust efficency wil not be as effective on a head with a 60% I/E ratio like the Ls7 for instance. This is why the split on the ls7 is so large (20 degrees). Its not that exahust port is so bad on the L92 its that the intake port is so good..."

http://www.ls1tech.com/forums/showth...light=l92+cams

Again, I don't have experience regarding this subject, but I've read and have heard stories on other forums that earlier Gen. III cams don't completely play well with the Gen. IV goodies. I know I'd like to hear from anyone else who has any information

I'm probably way off from what you wanted to hear, but maybe they didn't switch the valves, rocker arms and play with the compression ratio. When you switch out a cam, there are many times you'll need to mill the heads, get a thinner head gasket and swap the valve springs. Many times, you'll even need to bore a larger hole for the valves and invest in larger valves. Sometimes, instead of milling the head and getting thinner gaskets will work against you. Thicker gaskets may be the answer (though extremely rare). Compatible parts are the way to go, especially when it comes to cams. If you put the wrong one in an ill prepared head, you're asking for trouble. Sometimes they'll lift too much and destroy rods, valves, the head and the cam, blow gaskets, etc... Other times, they may not lift enough and rob power, and screw with the idle, etc... Again, if you know what you're doing, you'll be fine, but for the money it would cost you to rework the heads, you may as well get the heads that go with the cam, or just the opposite.

That's why the hot cam is so freakin' awesome! All you've got to do is swap out the old with the new, and there's an instant 50 ponies! (granted it's certainly an entire weekend job filled with a lot of :upset: ) Everything is so crammed in there it's not even funny.

Hope this helped.

If anyone else sees inaccurate information, feel free to correct me on my foolishness.

[Robert91RS]

Rad makes a good point and I expect a LS3/LS7/L92/etc hot cam or cams not long from now. I will also add that lift is not the only thing to consider and neither is duration. While both play an important role in the end power, lobe seperation and ramp rates combined with these numbers produce the perfect package. Example, Shank listed the stock LS7 cam for you, .591 lift and 211/230 duration with a set of heads and intake that flow as well as the LS7 pieces would produce 500hp even on the LS1 so why with more displacement does the LS7 not produce more? Well for one look at the 121 lobe seperation! Common seperation is 107-114. Just keep that in mind when you go cam shopping, bigger isn't always better.(just most the time )

[o2camaross]

the only time you would mill the heads or go with thinner head gaskets would be to raise compression and get more power. You could put just about any aftermarket cam in an engine and not have to mill the heads. You will prolly need better valve springs and if the duration is way up there you may have to flycut the pistons for ptv clearence. As far as the GMPP hot cam im sure that might satisfy alot of ya'll but im gonna be going with a little bit bigger aftermarket cam. Something like from LG motorsports. They have had great success with their cams in the 08 vettes. Over 500 RWHP with cam, headers, intake and tune. Just my $0.02

[boxmonkeyracing]

the LS3 already has a hotcam from GMPP. that's why you can by a crate engine ls376/480 which produces 480 hp. and that's the hot cam i believe he's asking about.

[TFord]

Originally Posted by Robert91RS

Rad makes a good point and I expect a LS3/LS7/L92/etc hot cam or cams not long from now. I will also add that lift is not the only thing to consider and neither is duration. While both play an important role in the end power, lobe seperation and ramp rates combined with these numbers produce the perfect package. Example, Shank listed the stock LS7 cam for you, .591 lift and 211/230 duration with a set of heads and intake that flow as well as the LS7 pieces would produce 500hp even on the LS1 so why with more displacement does the LS7 not produce more? Well for one look at the 121 lobe seperation! Common seperation is 107-114. Just keep that in mind when you go cam shopping, bigger isn't always better.(just most the time )

yeah see now you guys have stepped a little bit out of my range of knowledge...lol. I first started learning/modding cars in 03/04 and Id say Im pretty savoy on everything except engine internals cam, crank, bore, stroke, heads. I understand it, but I fail to understand how to improve on it. is there like a cams for dummies!

Originally Posted by boxmonkeyracing

the LS3 already has a hotcam from GMPP. that's why you can by a crate engine ls376/480 which produces 480 hp. and that's the hot cam i believe he's asking about.

I noticed that setup also

[Robert91RS]

Actualy the cam in the LS376/480 is part #88958733, the same old ls1 hot cam we have had for years. And another fun fact, the stock LS3 cam is 551/522-204/211 and the hot cam is 525/525-219/228(hot cam is Smaller on the intake but still makes more power and supports my point.)

I was'nt saying that the LS1,2,6 cams wouldn't work but rather that more gain would be attained by making a hot cam with more split designed around the L92 style ports.

[BowtieGuy]

Originally Posted by Robert91RS

Rad makes a good point and I expect a LS3/LS7/L92/etc hot cam or cams not long from now. I will also add that lift is not the only thing to consider and neither is duration. While both play an important role in the end power, lobe seperation and ramp rates combined with these numbers produce the perfect package. Example, Shank listed the stock LS7 cam for you, .591 lift and 211/230 duration with a set of heads and intake that flow as well as the LS7 pieces would produce 500hp even on the LS1 so why with more displacement does the LS7 not produce more? Well for one look at the 121 lobe seperation! Common seperation is 107-114. Just keep that in mind when you go cam shopping, bigger isn't always better.(just most the time )

Good points all around. A 121 LSA is freaking ridiculous. I especially agree with the comment about cam size. A good buddy of mine said he knows a guy who owns an older fox body running a cam with over .610 lift. I told him that guy is a moron and if he stepped it down he would run faster and more efficiently, even on a blown motor that's too much. He seemed to not believe me. Said I didn't understand how small block Fords work.

[Robert91RS]

Originally Posted by BowtieGuy

Said I didn't understand how small block Fords work.

Who does? I told an LS1 friend the same thing but they never listen, stuck on BIG=good.

[BowtieGuy]

Originally Posted by Robert91RS

Who does? I told an LS1 friend the same thing but they never listen, stuck on BIG=good.

Most people end up picking a cam that takes all the efficiency and drivability out of their motor.

That's why I tell people to contact their preferred cam manufacturer directly, they will gather information on your vehicle and your goals for it, and hep you find a cam perfect for your application.

[boxmonkeyracing]

when I was trying to build a lq9 block with l92 heads back about 6 months go (only got into the research phase). I noticed that a mild cam was better then an aggressive cam with those heads. . .