C5 Forever

Pat, what size stall would I need to run with this cam? Also, I'd be running it on stock heads and an LS6 intake and later go with AFR 205's. Do you think that would be ok or do a need a 90/90 set up and AFR 225's? Thanks.

ThirdGenLS1

iTrader: (11)

with a cam running a lsk lobe i would prolly go with a small bore 225 just so it will take advantage of the lift, but i'll let Patrick take this one since he is more knowlegable in this.

Jimmy P

iTrader: (177)

Ive got a 4400 stall, and currently am using a G5X4 cam. I will be taking it out to inspect how it looks when I throw on a set of ETP 225 small bore heads that are milled down to 57cc. What type of cam would you guys recommend for a setup like this? It does get driven on the street a couple times a week, but I am mostly interested in producing good 1/4 times, and dyno numbers to back it up wouldn't hurt either. Emissions is not a concern for me. I have read that the ETP 225 small bore heads start to die out at about
.630 lift, so this may be something to keep in mind. thanks

speedracer5532

iTrader: (8)

Hey Patrick, how about running cranes quick lift rocker with the LSK lobes?

Patrick G

iTrader: (14)

Because the cam makes abundant low-end torque, a 3600 stall would work fine, but a 4000 stall would work even better. Depends on your goals. More street than strip: 3600 stall. More strip than street: 4000 stall. All out race: 4400 stall.

AFR 205s would have better low speed driveability than the AFR 225 and would make similar power up high. Honestly, I gave up more than I gained by swapping to the 225s. Although the 90/90 is not necessary, it is a great compliment to the AFR heads, especially when velocity-ported by Tony Mamo.

Patrick G

iTrader: (14)

If you ran the Crane rockers with these very fast LSK lobes, you would be accelerating the valve near solid roller speeds. The spring pressure required to control the valves would put too high of a load on the hydraulic lifters IMO. I would not recommend it.

Ragtop 99

iTrader: (7)

I'll be curious to see your torque graph. If it is anything like DAB's 224/224 110 106, but shifted to the right for the change in ICL, a 4400 stall may be ideal with your cam retarded 2 degrees.

JZ'sTA

iTrader: (23)

I love using big stalls in the LS1's as the car really picks up.
I however would defentially say this is a perfect cam for one using a 3500-3800 and not wanting to go any bigger. Not saying the larger stall wouldn't work better but some people dont like the 4000+ stall's for whatever reason and this cam will all the low end power/torque would be great for those people.

Patrick G

iTrader: (14)

That's a very healthy size cam. Since the small ET heads have been shown to back up above .600" lift, you might be best off keeping the cam that you have.

eamador11

Well said J-rod. That explains why sometimes I kill some cars that have bigger cams than me and peak higher HP than me. They line up with me at 40mph, and hit it. Since my torque curve is much broader and flatter than the guy next to me, I pull him till 120 and by then the race is over. Then they ask if I sprayed them. LMAO

I only dynoed 416RWHP but ive beaten guys with 450rwhp

ThirdGenLS1

iTrader: (11)

I totaly agree, when i first started to look for a cam i just looked at the peak numbers, then once i started to read i started to relize that power across the board is where its at. So now my cam search is come to looking for the cam that will give me the most average power.

mrr23

iTrader: (3)

boring sound is relative to the person's taste. here's sound clips of the wife's car when it had the 062 cam in it.

rev in park

idle in park

idle in drive

Spinmonster

What about running the 1.8 quick lift rockers with the 224/228 XER for those that already have it? It would seem to work well. The faster open speed is present with the 1.7's as Tony Mamo used in his set-up and with the 1.8's. The advantage with the 1.8's though would be that you would have the added lift to both lobes. It wouldnt have the overlap as the cam you now have but would have some of the other advantages such as faster opening from the variable ratio and added lift.

Grimes

iTrader: (3)

has anyone used shimmed prc duals for lsk lobes? very interested in pat's exact cam, but I would rather not have to replace 921's every other year....$$$$$$!

GrannySShifting

iTrader: (10)

Pat, Id be very interested to see how your car responds to cold and hot weathers. I think that cranking compression might be a bit of a problem with pump gas and that much timing.

pop a plug out and let us know how it looks every now and then. I think 6th gear lugging up a hill will be the biggest problem

Spellbound

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JakeFusion

iTrader: (7)

Patrick, I'm very interested to see your results. DCR is key to great average power as I've been preaching for a while.

Btw, some of the best results I've ever witnesses came with an ICL on a 110 and DCR up around 8.8:1 for a 346.

Patrick G

iTrader: (14)

At Thunder Racing, we tested the AFR duals (same as PRC/Manley/Patriot duals). They had nearly identical spring rate to the Comp 921s, but just didn't have quite as much coil bind area. By shimming them to within .050" of coil bind, I believe you can run PRC duals with LSK lobes with no problem. They seem to have enough spring pressure. Whether they'll be as robust as the Comp 921s remains to be seen, but they sure are lots cheaper! If I were to do it again, I would have saved the money and kept my AFR duals (with the proper shimming of course). FWIW, we had an installed height of 1.740" when running 921s.

Patrick G

iTrader: (14)

That's the great thing about having EFI Live. I can very carefully tailor my timing curve to stay out of knock at low rpm with a big load (like climbing that hill or passing in 6th gear). Right now, my 1400-1600 rpm timing is in the 18-20 degree range (at WOT in the big load cells). With more logging, I may find that I'll need to back it off some, but so far no knock. Maybe my tight quench is helping here!

hammertime

iTrader: (1)

Wow great read, Patrick!

Newb here, but been at LS1 on and off for a while. I've been wanting to H/C my car for a long time, and I've always been afraid of overcamming, even though most will say go bigger - way bigger.

Your findings confirm things I've known for a while - but videos of G5X3 and TRex cams at idle made me forget!

Can't wait to see the end results

Best of Luck!