QCK57

Hi all, just about to upgrade my motor to a
408 LQ9 TT AFR's and all the other goodies??

The bloody cam, for FI, the greatest mystery of all??????????

i have had a-

N/A 252/254 .620 112LSA loved it mad sound a bid sluggish until higher RPM

FI 228/235 .600 117LSA ok quiet idle potentially good turbo cam.

I want the best of both worlds for my new cam, can this be done???????????????

I want my ne 408 TT to fly, but on idle have that mean sound???????

Please help oh great cam gods

PLEASE

hellbents10

iTrader: (10)

Yes it is possible with knowing all the specs on the car, engine and most importantly the turbo setup itself. To spec a turbo cam you need to have a good idea of what kind of hot side and turbine wheel/housing you have.

Patrick G

iTrader: (14)

Exactly. You need to know what your pressure differential is going to be. If your pressure differential is above 2:1 (twice the back pressure as boost), you'll want to limit your overlap. If your pressure differential gets closer to 1:1, you can run a cam closer to NA specs.

In my opinion, if you want the best of both worlds, choose a cam with low overlap and have your tuner keep the idle speed low and idle timing low. This will make for a healthy lope, even with a mild cam.

Shawn @ VA Speed

iTrader: (3)

I would have to disagree with this statement-while this make make to most hp on the dyno-this doesn't happen to be the best performer at the track.

Shawn @ VA Speed

iTrader: (3)

If you want a cam the works the best-it's not going to sound that aggressive-the cam i had in Fireball's 1800hp LS2 sounded like a 224 cam

Fireball

iTrader: (21)

and it wasn't that small either

Patrick G

iTrader: (14)

I suppose I use the term "closer to an NA cam" fairly loosely. I think you would agree that as the pressure differential approaches 1:1, you can use overlap more in your favor. Perhaps not 29 degrees of overlap like his original NA cam , but probably more than 0 degrees at .050". Again, this is assuming a pressure differential close to 1:1 (which typically only race cars achieve).

Shawn @ VA Speed

iTrader: (3)

yes you do end up with more overlap-but only because the duration is bigger.If i could get a steep ramp on the lobe-i would run less every day.My cams don't even resemble anything you would think about putting in a n/a engine.The only ones that come close to acheiving 1:1 are stick cars with small engines-most everything else is much higher

Texas_WS6

iTrader: (9)

Subscribed!

Johnnystock

iTrader: (6)

1800hp...I think I'll call your shop if ever going FI...

Shawn @ VA Speed

iTrader: (3)

I do n/a and n2o also

Shawn @ VA Speed

iTrader: (3)

remember when you got the thing running?you called me and asked if i put the right cam in it.After going to the track you were sure it was right

Fireball

iTrader: (21)

purred like a kitten...roared like a lion

WKMCD

iTrader: (2)

Do you do turbo cams for 427's?

one2nv

Hi guys I need some help....I have a LS3 that I am about to turbo charge....The turbo that will be going on it is a GT4502R Im from Australia and I dont think Garrett Makes these spec turbos for the states so please refer below for specs. Im after a lumpy *** cam what would you suggest would work best with the LS3 and the turbo Im putting on it? Any of the turbo comp cams do the job? If theirs any more info you need about the car let me know.

GT4502R
Compressor Housing AR
0.72
Compressor Wheel Inducer Size (mm)
76.58
Compressor Wheel Trim
56
Turbine Wheel Exducer Size (mm)
71.42
Turbine wheel Trim
76
Turbine Housing AR
1.05

symond93

There were only a few different cam-shaft designs available to hot rodders, and they were commonly known as either 3/4-race or full-race cams.now a days Cam manufacturers offer hundreds of profiles to choose from, and they go to great lengths to take the mystery out of their products.