2001CamaroGuy

iTrader: (6)

Has anyone ever actually TRIED the GM GrandAM cam in a 346?

the specs are:

Duration = 239/251 @ 0.050" (294/306 advertised)
Lift = 0.570"/0.570"
LSA = 106

with an RPM range of 4000-7000


the LG Motorsports G5X2 cam is:

Duration = 232/240 @ 0.050"
Lift = 0.595"/0.609"
LSA = 112LSA


I would think the extra duration would make some crazy HP (no torque) and the lower lift should make valve springs last. The only thing I question is what RPM would a person have to run to make this thing not die at ever stop light?

With the 106 LSA it should THUMP even at 1000RPM idel and with a 11.5:1 - 12.0:1 CR it should be "somewhat" better of an idler.

jrp

iTrader: (16)

it would definately be track only if it would even work.

J-Rod

Yes, some folks have used it...

Bink

I have it. Idles at 1200 RPM....decent lope. Street only...never been to the track. Stock bottom end LS6....only spin it to 6700 RPM. 6700 RPM leaves alot on the Table. Running the SDPC LS6/LPE heads 58.5 cc chambers with about 11.5 CR.
Above 3500RPM it absolutely screams. Still playing with the "Tune"...eventually I get it dynoed and move to a forged bottom end. I hope to run "One Lap " with it .....2005 ( by then I'll probably go to a more aggressive setup)? FWIW.
joel

J-Rod

Binks. Look at the GM computer. I thas the tune for that cam already done. Or talk to LGM. They have tuned several cars with this cam.

Bink

J-Rod- thanks for the help. I asked Godspeed ( Jeremy) to help me out several times - he said "send me your file"- I did, and I never heard from him again.I pretty much have it tuned except a recurrent drop in timing and AFR at 2500, 3000 and 3500 RPM - when held at constant RPM, TP% etc. It's not Cat Overtemp but very similar......
I'm going to try to get a lot of VE data this weekend for ChrisB and NoGo's VE tuning.....I'm hoping this improves my transition to idle.



Interestingly - Before I pulled my 2001 Z06 cam I degreed it and recorded lift and duration every few degrees...intake and exhaust. Then after the install I did the same with the Grand Am cam. I plotted the data and found that the intake closing point of the Grand Am cam is the same as the Z06 cam!! Not as I would have thought since people say "narrow LSAs bleed off compression". Dynamic CR is 11.5:1. FWIW.
joel

J-Rod

I dunno, I talked with Lou, and he said he had done several cars with that cam, and that the computer was avaliable from GM. He said they have about 32 degrees of timing. I would guess 11.5 Cr and 32 degrees on pump gas wouldn't be the hot ticket.

Keep us posted on the results...

Bink

Hey, sounds very good to me ....I'll call Lou. Thanks, again!
joel

2001CamaroGuy

iTrader: (6)

guys who have this cam, what kind of HP number are you making out of it?

Louis

iTrader: (7)

Weve seen as high as 450/~400 ( Think that was the tq.)

Forged bottom end, 11:1 CR ( Speed worldchallenge rules) GM LS6 CNC heads, stock un ported TB, LG Pro LTs. THis was a C5.

It definately needs to be spun beyond 7k.

I had a graph, Ill see if I cant dig it up

TXNC5

My brother had it in his 02 Z06 with a slight off-set crank (~360 ci). He put down 457/417, and that was over a year ago with an older version of LS6 CNC heads. He drove it every day.

I put it in my 383 with LS6 CNC heads, TPIS, 3.73, etc. and put down 475/420. I could run 11.3's with 1.8 60' in good weather here in Texas. It was my daily driver then. FWIW, I am still tuning my new SR, 244/253 .689/.698 110, and I don't mind driving it around town.

Hey Lou, did you guys ever get Pat's car tuned with this package. I sent him some info about it (and about tuning), but never heard back from him.

Joel, you need to stop scaring the neighbors and go to the track. I have had some terminal computer failure, and I haven't recovered some of my tuning info.

John B

iTrader: (10)

Joel, help me out here.....based on the '01 ZO6 cam intake valve closing at 81° the stock ZO6 dynamic CR ~7.2:1 not 11.5:1......please explain!

Bink

John - sorry to hear about your computer. I do need to get some track time...maybe in the spring. I need 4.10s......and a bigger bank acct.
Your cam strikes fear in Type Print!!!!( I Like Big Lobes - Pairs!)
How are the launches coming along???
joel

Bink

Louis - Your '99 Hardtop is Beautiful!!! My compliments to the Chef.
joel

Chris81

iTrader: (1)

Does your brother work at Scoggin Dickey? It sounds just like the car my cousin described to me.. If so my cousin works with him and I looked at that car when it was for sale at Classic Motors in Lubbock, we actually got the guy to start it up for us because I had heard that it had the Grand Am Cup cam, needless to say..it sounded wicked as hell.

Hugger SS

Would this cam work with AS 5.3 heads milled .10

TXNC5

Yes, that was my brother's car. You should have heard it with no cat back! He also had some bad *** Penske nitrogen shocks on that car. I thought my car handled well. Then I thought a Z06 handled great. Then I drove his setup, unbelievable. That is a really sweet car. I almost bought it because my friggin coupe is too damn heavy.

When I put mine back together about two month's ago, I circled my neighborhodd twice with only my headers hooked up. It was just getting dark when we fired it up. On my second loop, there were way too many people coming out their homes to see just what the hell was going on. I am sure they wanted to know who the white trash NASCAR loving vette owner was. Soon after, all the men were around asking for rides (when their wives aren't around). I still get the 'evil eye' from all the women in my hood.

TXNC5

I did manage mostly 1.6's last time out. My best run was 11.09 and best MPH was 127.88. So I am getting better. Will see how long my own build of the 4.10's last.

I am going tonight. The air should be decent. I finally have my Timing Tuner installed and will try at least a 100 shot.

Last Friday, my racing buddies went. The air was soooooo good they each ran about 3-4 tenths faster than their previous bests. I would have finally been in the 10's NA for sure. I weighed my beast: 3475!

I send you a link to an 11.20 run of mine.

Bink

The SDPP heads are milled .055". I cc'd mine - -> 58.5 cc.
Stock bore and stroke.
2002 factory headgasket - ( 0.056" ?)
Flycutting pistons -1 cc
Piston out of the hole - is it .006" ?
I looked up all the neccessary info back then (spring '03). Sorry, I didn't record it.
I used this DCR Page/CalculatorDCR . Actually, if I remember correctly it came out slightly above 11.5:1. FWIW.
joel

John B

iTrader: (10)

Using your data with the above DCR calculator puts the SCR at 11.17:1 and the DCR at 7.635:1