grand-am cup cam?
03-22-2006, 03:29 PM
#2
11 Second Club
iTrader: (3)
Join Date: Feb 2005
Location: Covington, LA
Posts: 687
Likes: 0
Received 0 Likes
on
0 Posts
Alot of aggravating undriveable power. 
I don't know the specs offhand, but it's much bigger than the T-rex and is basically a track-only cam that makes power from something crazy like 4800-7300.
I don't know the specs offhand, but it's much bigger than the T-rex and is basically a track-only cam that makes power from something crazy like 4800-7300.
03-22-2006, 06:04 PM
#4
TECH Regular
Join Date: Mar 2006
Location: Rolesville, NC
Posts: 471
Likes: 0
Received 0 Likes
on
0 Posts
Grand-Am Cup Cam GMPP# 88958606
239/251 570/570 LSA106
"From the good folks at GM. The LS1 "Grand-Am Cup" hydraulic camshaft. Thats right folks, this is no solid roller cam either. RPM range is 4000-7000!
This hydraulic roller camshaft is designed by the GM Racing Division for road racing applications in the Grand-Am series. Serious duration and lift will require that the piston to valve clearance be checked as well as major PCM modifications. For best torque, install the intake centerline 105 for best power install at 107. GM recommends lightweight valves and valve springs from the 2002-03 LS6 engine for use with this camshaft.
Note: When installing this camshaft, it is critical that you use the point of maximum lift on the intake lobe. This is not a symmetrical lobe design!"
My understading is that this cam should be use with LS6 ported heads for Grand-Am use.
http://www.sdpc2000.com/cart.asp?act...1981&pid=90925
I believe there is a dyno of this cam in this thread on road racing cams
https://ls1tech.com/forums/generation-iii-internal-engine/422520-head-cam-road-racing.html
239/251 570/570 LSA106
"From the good folks at GM. The LS1 "Grand-Am Cup" hydraulic camshaft. Thats right folks, this is no solid roller cam either. RPM range is 4000-7000!
This hydraulic roller camshaft is designed by the GM Racing Division for road racing applications in the Grand-Am series. Serious duration and lift will require that the piston to valve clearance be checked as well as major PCM modifications. For best torque, install the intake centerline 105 for best power install at 107. GM recommends lightweight valves and valve springs from the 2002-03 LS6 engine for use with this camshaft.
Note: When installing this camshaft, it is critical that you use the point of maximum lift on the intake lobe. This is not a symmetrical lobe design!"
My understading is that this cam should be use with LS6 ported heads for Grand-Am use.
http://www.sdpc2000.com/cart.asp?act...1981&pid=90925
I believe there is a dyno of this cam in this thread on road racing cams
https://ls1tech.com/forums/generation-iii-internal-engine/422520-head-cam-road-racing.html
03-22-2006, 08:09 PM
#5
That cam is not for you. You need to look in the 224-230 range if you want anything worth your while. You arent going to be driving that cam everyday because the powerband is up in the 4000+ range. Ripping that cam to full potential on the street will not happen maybe but only 2% of the time. If you are lucky your engine will stay together at 7K spins.
Don't do it. It may sound cool, but you will hate yourself.
Don't do it. It may sound cool, but you will hate yourself.
03-22-2006, 09:31 PM
#6
TECH Fanatic
Thread Starter
iTrader: (2)
Join Date: Aug 2005
Location: Walker, La.
Posts: 1,005
Likes: 0
Received 0 Likes
on
0 Posts
I started second guessing myself about a cam choice. I am worried about valve spring life. Before I was looking a .600 lift cam. Now I'm worried about change my springs every 20,000 miles, lol. I wanted to get the FM13, but on a 110 LSA. I was trying to get the power sooner in RPM range. I have my rev limiter set at 6,500 RPM and didn't want to rev it any higher. I also wanted to get a nasty "lope from hell". I guess i can fix that in the tuning. My second choice cam is the TSP 231/237, but I'd like to keep as much of my business with Futral as possible.
Would the valve springs last more than 20,000 miles with a .570 lift?
or is there not much difference in .570 lift to a .600 lift.
I know the lobe shapes are different, but does it really make a difference how fast the valves open?
I don't rag on the car too much, but when I do
Maybe I can design a "Baby Grand-am Cup Cam", lol.
Maybe I should just get the FM14 on a 112.
someone just shoot me, lol.
any opinions are much welcomed
Would the valve springs last more than 20,000 miles with a .570 lift?
or is there not much difference in .570 lift to a .600 lift.
I know the lobe shapes are different, but does it really make a difference how fast the valves open?
I don't rag on the car too much, but when I do
Maybe I can design a "Baby Grand-am Cup Cam", lol.
Maybe I should just get the FM14 on a 112.
someone just shoot me, lol.any opinions are much welcomed
03-22-2006, 11:18 PM
#7
Here's a post I had going a while back talking about the cup cam so maybe you can get some info on there about it https://ls1tech.com/forums/generation-iii-internal-engine/424794-grand-am-cup-cam-vs-t-rex-killer.html. This is a cup cam, http://www.ls1sounds.com/Borla/borla...lsa_00WS6.mpeg, sounds mean but you gotta look at what you need, especially for a street car.
Trending Topics
03-23-2006, 06:22 AM
#8
TECH Regular
Join Date: Mar 2006
Location: Rolesville, NC
Posts: 471
Likes: 0
Received 0 Likes
on
0 Posts
Originally Posted by circusboy
Maybe I can design a "Baby Grand-am Cup Cam", lol.
I was thinking the same thing. Something like
239/251 570/570 LSA 112
With ported LS6 heads
fast 90 intake
90 mil TB ( I have now)
road racing / track time is the intended use on a 2003 vette.
03-23-2006, 06:56 AM
#9
TECH Fanatic
Thread Starter
iTrader: (2)
Join Date: Aug 2005
Location: Walker, La.
Posts: 1,005
Likes: 0
Received 0 Likes
on
0 Posts
wouldn't that push the power band even further up in the rpm range.
i was thinking about a lower int/exhr, same lift with a little less overlap.
i was thinking about a lower int/exhr, same lift with a little less overlap.
03-23-2006, 07:19 AM
#10
11 Second Club
iTrader: (3)
Join Date: Feb 2005
Location: Covington, LA
Posts: 687
Likes: 0
Received 0 Likes
on
0 Posts
Originally Posted by circusboy
wouldn't that push the power band even further up in the rpm range.
i was thinking about a lower int/exhr, same lift with a little less overlap.
i was thinking about a lower int/exhr, same lift with a little less overlap.
Mike
03-23-2006, 07:49 AM
#11
TECH Regular
Join Date: Jan 2006
Location: Houston
Posts: 451
Likes: 0
Received 0 Likes
on
0 Posts
DONT DO IT LOL listen to orangeappeal he knows his ****,take everyones opinons, but yours counts the most id go with a 230ish range IMO good luck and hope it turns out like you want it to 
