GTOFAN91

Hey guys what idealy would be the best can for stock 243's, a fast, and bolt ons be? Trying to figure out a build for a buddy, he hears an ms3 will work with the stock 243's but im sure we might have PTVC issues. Am I wrong, and if so what do you guys think of the G5x3 cam on stock 243's?

HCI2000SS

iTrader: (2)

What motor?

svede1212

iTrader: (3)

What's he going to use the car for? What's his tolerance for bucking and driving issues? Is it a stick or auto? How often does he want to change the springs?

Jtm2085

iTrader: (1)

Per TSP you shouldn't have PTV issues. I am running the BTR stage 4 with 243's and love it

GTOFAN91

this would be a 2004 GTO engine, and 6 speed in a 2000 camaro. Its a budget build so thats why he is choosing the stock 243's, and the will have upgraded valve springs.

Jtm2085

iTrader: (1)

Any cam that big is going to feel sluggish down ole with stock gearing IMO. Something to think about. I don't think I would go through the trouble of swapping heads if I was going to put stock 243's on. but then again if you mill them, there goes you PTV clearance.

GTOFAN91

Well guys does anyone have any actual recommendations on cams? Also am I the only one that thinks big cams don't feel sluggish down low? I mean guys running 11.6x's-7x's on cam only bolt on ls1 cars, cutting some nice 60 foot times have to agree that with good tires, and a driver they aren't "slow" out of the hole. Maybe on a dyno which shows higher rpm torque peaks would imply a dog down low, but results from cam only builds, and driving cam only cars speaks another story.

So does anyone have recomendations on a good cam, that they didn't have PTV issues, or back to the original question...Will an MS3 work with stock 243/799 heads?

lcfdvette

Why not call a few sponsors and see what they say? Especially Texas Speed since your wondering about their MS3 cam. They may tell you it will be a perfect fit for what your wanting to do with the car or they may lead you in another direction with a different cam that will perform better for your needs.

madmike9396

iTrader: (29)

Why not a custom grind ?

Jtm2085

iTrader: (1)

I said it would feel sluggish with stock gearing. Most fast cam only cars are running 4.11's with a 26in tire or 4.56's with a 28. See if you can find a few local cars with different set ups and go from there. I have daily driven my car with a 235/243 on a 111 with 4.11's and I think it's very tolerable. Others might not think so.

TXZ28LS1

iTrader: (5)

Im running livernois motorsports stage 3 LS6 with TSP 233/239.

About the biggest cam i would run in a daily driver.

Felix C

FAST and stock 243s is not a matched combo hence why you have received the responses you have. If the trans is from the GTO it may not be sluggish down low. You did not mention the axle gear.

GTOFAN91

Why are 243's and a FAST 92 a bad match? Gears that are currently in the car are 3:73's. Also if he is working off a budget, and can't afford aftermarket heads, I don't see why 243's would be a bad idea. Truth is more power is more power. If the heads net 20-30 wheel horse power, and only cost 300 bucks, that was a pretty easy 30 horse gain. Ill call TSP thanks guys.

gagliano7

https://ls1tech.com/forums/dynamomet...k-results.html

Felix C

I did not say bad only not matched which of course means air flow capabilities of either. No money? We all know about that. You can do things little by little or save and do them right. 243 do not flow over 265 stock. Compare that to the FAST.

Also, how much you gain on stock 243 vs 241s depends on cam,intake,exhaust. It is not just bolt on 20-30rwhp.

Jtm2085

iTrader: (1)

Why not take the $1100 dollars from the fast set up and have the heads worked? From what I have read, stock 243's are worth around 15whp over 241's. You would make more power with AI cnc'd 243's with the ls6 manifold I would think and still be within budget.

HCI2000SS

iTrader: (2)

This is a solid point

Felix C

I just noticed something else. post #5 The valve springs in the 243s are too weak for a modern high lift camshaft. If you say "they will have the upgraded valvesprings" as in using the ones in the 243s then you will need an older low lift cam. Otherwise budget for valve springs to match the new camshaft.

01ssreda4

iTrader: (96)

Cam Motion Titan 4

http://store.cammotion.com/mobile/the-titan4