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Old 11-17-2009, 09:46 AM   #1
0TheRadioFlyer97
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Default GM "hot cam" for LS1

I read about this a little bit in the "how to build a hi pref LS1" and forgot the specs. I'm thinking this guy may make the perfect canidate for my cam swap.

a) what are the specs of the GM LS1 hot cam?
b) how much do these cost/where can i get them?
c) will this cam work with my 1.8 rockers?
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Old 11-17-2009, 10:07 AM   #2
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the GM Hot cam is too small for any performance gains. There will be some gains,and some increase in rubble, but you can do better

Look at other thread for cam specs

http://forums.corvetteforum.com/c5-t...cam-specs.html
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Old 12-10-2009, 03:58 PM   #3
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Quote:
Originally Posted by AU N EGL View Post
the GM Hot cam is too small for any performance gains. There will be some gains,and some increase in rubble, but you can do better

Look at other thread for cam specs

http://forums.corvetteforum.com/c5-t...cam-specs.html
I just read a Car Craft article where they claimed a GM LS1 Hot Cam swap yielded 49 HP?
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Old 12-10-2009, 05:50 PM   #4
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Wait a sec... the Hot Cam isn't sooooo bad. Nobody is going to argue it's the *best* for every application. No cam is. A friend of mine made 400rwhp with his in a 1999 Camaro SS with stock 853 heads and LS6 intake. It idles very well... has a nice lope... and is very easy on valve springs. Of course, you could step up to 1.8rrs but the "easy on valve springs" comment no longer applies.
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Old 12-10-2009, 06:05 PM   #5
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The LS1 hot cam has long been referred to as the LS1 "****" cam on ls1tech.com


.525 lift.... that alone should tell you that power is left on the table.

The only saving grace is that they are cheap.
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Old 12-10-2009, 11:21 PM   #6
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Quote:
Originally Posted by TheRadioFlyer View Post
I read about this a little bit in the "how to build a hi pref LS1" and forgot the specs. I'm thinking this guy may make the perfect canidate for my cam swap.

a) what are the specs of the GM LS1 hot cam?
b) how much do these cost/where can i get them?
c) will this cam work with my 1.8 rockers?
Good cam, a friend of mine has it on his Z06. The LS3 crate motor with this cam makes 50 HP above the STD LS3 without it. .525/.525 valve lift @ 1.7 rocker ratio, I believe the intake and exhaust duration are 219 & 228 degrees respectively @ 050" lift with a 112 deg LSA.
There is a reason why the lift is lower than the aftermarket gucci cams, it's called valve train reliability.

Last edited by ipuig; 12-10-2009 at 11:27 PM.
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Old 12-10-2009, 11:43 PM   #7
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Thats the cam GM created to try to get into the aftermarket cam world and failed miserably. Not only is there no power, but the driveability is just horrible!!

There are so many superior cams available for the LSx that will make tons more power and still be smooth as butter at idle.
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Old 12-10-2009, 11:55 PM   #8
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http://www.carcraft.com/howto/ls1_en...all/index.html
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Old 12-11-2009, 07:39 AM   #9
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**** cam, that is a good one.

LS-1 2001+
198/208 500/500 116

LS-6
207/217 525/525 116

Gen3 Hot cam
219/228 525/525 112

LS2
204/211 525/525 116

GMPP ASA
226/236 525/525 110

GM-Grand am cup
239/251 570/570 106

Last edited by AU N EGL; 12-11-2009 at 07:41 AM.
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Old 12-11-2009, 08:57 AM   #10
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The primary reason I would not change a cam is the issues with springs. I for one have no desire to change springs every 30K miles after a cam swap or have one or more break at high rpm runs. If the Hot Cam eliminates these issues and gains 49 HP it would be remarkable. I see 2 posts where friends have the cam and it performs well. Several say it is not worth the effort but they do not give any facts or give any first or second hand knowledge. Anyone out there actually have this cam and can report on it? Is this the same cam that has been around since the late 90's?
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Old 12-11-2009, 10:17 AM   #11
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Quote:
Originally Posted by Faster04 View Post
I just read a Car Craft article where they claimed a GM LS1 Hot Cam swap yielded 49 HP?
What other mods did it take to make that power. I know companies will tell you such and such will make this power. They dont tell you that you need more then that one part to make that power.
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Old 12-11-2009, 10:44 AM   #12
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That cam is with 1 3/4 headers on a engine dyno see data below the power increase the cam makes even with headers is weak under the curve imo, I would not put that cam in my car imo. Unless your happy with what it makes power wise, I see why they call it the **** cam.




Click the image to open in full size.

Last edited by TR97C5; 12-11-2009 at 12:35 PM.
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Old 12-12-2009, 11:54 AM   #13
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The GM Hot cam for the LS1 is the LT4 Hot Cam carry over. I installed this cam and LS6 springs in my '02 WS6. It made a big difference in the attitude of the car. With headers and the GMMG chambered exhaust it cruised through a parking lot like no other. I know it did not make the best numbers but that was not what I was after. Once I tuned it, it purred in traffic too.
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Old 12-12-2009, 12:24 PM   #14
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If some one is looking for a good streetable cam that makes great power, look at some comp cams 224/224 or 224/228

224/224 581/581 114

224/228 581/588 114


I run a 224/224 581/581 112+4

also use Comp 918 springs

Friend of mine has almost convinced me to change to a

224/228 581/588 113+1 when I take off my 243 heads.

I say almost as I am not quite clear for the 113+1 vs 112+x But when the time comes I am sure he will enlighten me.

Now IMO, and it is ONLY MY OPINION, that GMPP has decided to go with more duration cams vs higher lift cams. Longer duration can produce great HP and TQ withoug sacrificing high lift, and spings to accomidate that high lift.

I have seen several carbureted LS1s with the ASA cam, beat the living chit out almost anything. ~ 425 rwhp and torque. Of course there where in ASA Stock cars too.

and the GMPP Cup cam, is the most reliable road race cam made.
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Old 12-12-2009, 12:27 PM   #15
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I ran the hot cam and made 390 at the wheels. No complaints.. Also ran the ASA cam but did not dyno it but it felt a bit stronger.
Running a 427 now so I have a slightly used LS1 Hot cam with springs and a slightly used ASA cam and a '04 ZO6 cam with springs if any one is interested..
Joe
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Old 12-12-2009, 01:12 PM   #16
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Quote:
Originally Posted by AU N EGL View Post

Now IMO, and it is ONLY MY OPINION, that GMPP has decided to go with more duration cams vs higher lift cams. Longer duration can produce great HP and TQ withoug sacrificing high lift, and spings to accomidate that high lift.

.
I kind of agree with this it seems imo more duration less lift (<600) also shifts the power down lower in the rpm range which is what I am after for my car if I go cam.

Last edited by TR97C5; 12-12-2009 at 01:25 PM.
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Old 12-12-2009, 03:56 PM   #17
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Quote:
Originally Posted by TR97C5 View Post
I kind of agree with this it seems imo more duration less lift (<600) also shifts the power down lower in the rpm range which is what I am after for my car if I go cam.
Odd you should say that. Based on the dyno you posted, there is almost no gain in the 2000's, a slight (13hp) bump around 3300, and then doesn't start making any more power until over 5000. I'd much prefer power in the 2500-5000 range where it's useful.
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Old 12-12-2009, 05:08 PM   #18
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Originally Posted by fdxpilot View Post
Odd you should say that. Based on the dyno you posted, there is almost no gain in the 2000's, a slight (13hp) bump around 3300, and then doesn't start making any more power until over 5000. I'd much prefer power in the 2500-5000 range where it's useful.

I was responding and kind of agreeing imo to AU N EGL talking about the GMPP cup cam 570 lift 231/259 duration and a cam he is thinking of going with 588/581 224/228. His point being you can get decent power with a longer duration than the stock GM cams per his example of the specs on GMPP cup cam and imo his future cam both of which are longer duration and higher lift than the stock GM cam without have to go high lift like 600/610 per my post <600 (under 600) reference and still get decent power without sacrificing a lot of power this is what I was kind of agreeing with. By not going over 600 lift say 600-610 lift and keeping lift around 575-595 and a duration around 228-230 which is much longer than stock you move the power imo lower in the rpm range and will get a fair idle vs a rough idle as per example F11 cam specs.

I want and am trying to find a good low end street cam makes good power and has fair idle not a rough idle. The cam I like is the F11 576/595-228/230 2200-6600rpm fair idle cam is under 596 lift decent/fair idle and good power. It put down on a LS1 with bolt ons on a dyno 387rwhp 371tq (see link below)and might be a little more power to get still due to some what high IATs on that dyno day. I will be researching this cam more and trying to find a dyno sheet (I pm 00 WS6 for his F11 dyno sheet) to look at the power under the curve but so far this looks like one I might go with if I go cam. I wasn’t referencing the LS1 hot cam in my response to him.

http://videos.streetfire.net/video/F...yno_690495.htm

*

Last edited by TR97C5; 12-12-2009 at 08:26 PM.
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