sand man

we will buy a turbo kit for a friends truck form a sponser here and was

wondring about the cam choice with the new power adder

the truck is 2002 1500 reg cab GMC sierra with a Manual NV4500 and 4WD

the truck has a 2008 LY6 with bolt ons and TSP 228 cam

what cam should we go with ? aiming for 600whp with an S480 on 9-12 PSI and might go forged internals later for 800+ whp

Jake99

iTrader: (5)

I think the 228 cam will works just fine. It's amazing the difference from one turbo cam to the next, one guy specs a 212 can the next a 238, yet they all seem to work good in the end. I like even dur cams na and with a turbo, seem to make more torque.

sand man

the overlap isnt a liklable thing with turbo , thats what iv heard

Jake99

iTrader: (5)

If you have the turbo system setup right it's not going to hurt you, na you have vac in the intake and a little pressure in the exhaust, most turbo systems have about 30 psi of ex pressure for 20 psi of boost so really it acts alot the same as na does, a little valve overlap ain't going to hurt anything. The wider lsa has been proven to make a little more peek HP on the dyno but overall power cure the tighter makes more mid range. But na is the same way, wider lsa will make more HP at the vary hi rpm.

sand man

so you wont recomened the isky triple 12 for this setup

as I stated the truck is a manual , no stall speed limit here

Atomic

iTrader: (42)

Turbo doesn't really care what cam you have.

kbracing96

iTrader: (26)

I've come to this conclusion too!

black00chev

iTrader: (2)

The way I see it lately, it makes more sense to spec the cam out as how you would want it if it were just going to be N/A for when cruising around. The turbo will just add to the awesomeness in the mid and upper RPM range once you get on it.

Look at Nelson Racing Engines for example. They have all these nasty turbo cars that are running fairly mild cams but are making a TON of power.

lglowe

iTrader: (3)

That's why everybody likes these baby tripple 12 cams.... Does real good out of boost and helps it get into boost real quick...

Jake99

iTrader: (5)

Yeah that's pretty much it, a cam like the 212 makes a little more cylender pressure at low rpm so it spools a little quicker, after that almost anything gos. That's why I was saying id just leave the 228 in there.