EVOVII_SWE

So as the title asks, will I have PtV issues on a stock LS7 engine? Anyone that knows for sure?

The 88958723 stage 3 cam together with titanium retainers and dual valve springs is supposed to go into an LS7 crate engine that I have in my AC Cobra replica. I’ve been running it stock for a few years now except for 2" headers, 4" sidepipes, 4" intake with K&N filter and I have the GMPP LS7 engine controller kit.

EVOVII_SWE

This is what it looks like if anybody wondered

KW Baraka

iTrader: (7)

Cam specs?

KW

KW Baraka

iTrader: (7)

Nevermind.....re-read the title and saw that it was a GMPP cam. off the top of my head, I would've said there would be zero issues with OEM heads and engine block that haven't been milled/decked....and if you're running OEM pistons.

The below is what's listed on the Scoggin-Dickey Parts Center web site.



Specifically released as a cam upgrade for the LS7 engine, these cams will work with all LS style engines --- nasty sound and big torque.

Advertised Duration (I/E) 294/335
Durartion @ 0.050 233/276
LSA 107
Lift (w/1.7) 0.595/0.595
Lift (w/1.8) 0.630/0.630

LS7 engine-dyno results with "Stage 3" cam show;

600hp @ 6800rpm
526ft-lbs @ 4900rpm over 450ft-lbs from 3200 to 6800rpms



So yeah.....you'll have no issues what-so-ever. Just install a fresh set of valve springs and get a damn good tune because this cam has about 40* of valve overlap! IMHO, that makes this puppy a 'race only' cam that'll be a serious handful on the street!

Best of luck.....

KW

MuhThugga

I'm willing to bet that someone somewhere read that description and bought one for their 5.3 swap.

KW Baraka

iTrader: (7)

....I'll bet it has happened!

The OP, on the other hand, has a stock LS7 so he's not THAT bad off.

Still.....I can't see a street use for that cam.....particularly in a little 2500LB Cobra.

KW

EVOVII_SWE

Thanks, I've had the cam in its box for many years now, didn't really know how agressive it was until after I already got it. I have some TI retainers and dual high lift springs laying around as well.

One thing though is that such a cam supposedly is not aimed for maximum torque but rather maximum top end power and might be better in a light weight car that struggles with traction already with the stock engine. But that might just be in theory that more low rpm torque would be worse.

This is obviously not a daily driver, far from actually, I've done about 3k miles in 4 years now, I hope that a really good tune at least could give it accaptable street manners.
Any one else that maybe have actually put this cam in a stock LS7 that could confirm that it will work?

The reason that I'm so concerned is actually that Jason at Katech suggested that I might run into PtV issues when we discussed it a long time ago. I have never heard about it anywhere else though.

DietCoke

iTrader: (18)

Thats 100% a tq cam, look at the valve events and lsa

KW Baraka

iTrader: (7)

The problem with the cam is that it's not a street cam. I understand that your Cobra's not a daily driver, but I'd bet the 3K miles you've driven it over the last 4 years were 3,000 ENJOYABLE miles.

With this cam.....that will almost certainly change. 40 degrees of valve overlap will take care of that.

That said.....with a set of springs meant to handle the lift in the range of this cam.....it's a direct replacement for the stock cam with a stock LS7. No PTV issues.

Yep.....agreed!

KW

DavidBoren

Look at the valve events?

I would love to. This is one of the cams on my list that I don't have valve events for. I was going to run the calculations with it (the gm stage three cam) straight up @ 107, but I didn't want to assume that just because the lsa is listed, that the icl is the same.

joyridin'

iTrader: (1)

I was going to install the Cam Motion "Got Lope" cam in my Cobra with a LS3. It weighs 2100 lbs, 3.70 gears, and a T56.

Think it will be too much with a set of TFS heads?

EVOVII_SWE

Any suggestions on alternative cams then? As I said I would like a cam that does not focus too much on low rpm torque but rather something that wakes up from midrange and upwards. Maybe a k501?

DavidBoren

Call kip, ed, pat, lonnie, martin, tony any of the vendors on here will hook you up with exactly what you're looking for. None of us can give you the caliber of advice that they can.