turbo 4.8 ?'s
turbo 4.8 ?'s Im going to build a turbo 4.8, i have the 4.8 tore down everything looks good, im on a budget so i cant go all out, look at my setup and see if you guys see anything i need to change or add, this is my first ls build so im still getting the feel for everything.
4.8 stock bottom end, gap top rings at .035, use arp head studs, 243 heads ( i need help on valve spring sizes, i hear that the boost can cause valve float), ls9 cam, ls9 head gaskets, ls1 intake and throttle body, 120# smart fire injectors, truck manifolds, on 3 performance 76 mm turbo, i plan on running 15 psi of boost. If the thing melts a piston i dont care i just had this motor laying around for a yr now, i would like to sawp everything to a 6.0 later on. Any input? do's and donts?
4.8 stock bottom end, gap top rings at .035, use arp head studs, 243 heads ( i need help on valve spring sizes, i hear that the boost can cause valve float), ls9 cam, ls9 head gaskets, ls1 intake and throttle body, 120# smart fire injectors, truck manifolds, on 3 performance 76 mm turbo, i plan on running 15 psi of boost. If the thing melts a piston i dont care i just had this motor laying around for a yr now, i would like to sawp everything to a 6.0 later on. Any input? do's and donts?
Awesome Nova, hard top too. If it were mine, I'd do the drivetrain and chassis way before the body. Let those rusty quarters flap in the breeze while you're having fun! As for valve springs on a budget try these
http://www.alexsparts.com/products/L...PRING-KIT.html
$107 complete and they work great out of the box. The LS9 cam is $139 or something but you'll need another $300 or so in parts to make it work on your early motor. I'd think about the stock cam for now if you're really on a budget, the fuel system and suspension/brakes eat up a lot of your money.
http://www.alexsparts.com/products/L...PRING-KIT.html
$107 complete and they work great out of the box. The LS9 cam is $139 or something but you'll need another $300 or so in parts to make it work on your early motor. I'd think about the stock cam for now if you're really on a budget, the fuel system and suspension/brakes eat up a lot of your money.
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Verdad Gallardo He probably did that because one of the magazines that pushed the 4.8 gapped theirs huge. Its not needed in my opinion, even 0.028 is more than you need IMO. I would do a top of 0.024 and 2nd 0.022
I dont really have a hp goal, i just need for it to last atleast half a season, My nova should weigh 3000# and i need to run 6.20-6.0's in the 1/8th to be competitive. Its a true street type class once a month, im just sick of bracket racing and this class looks fun and i figure i wont go broke building a 4.8/ turbo setup. I may start a build thread im not sure yet
Are the 243/799 heads worth the $400-500 im going to have to give to buy a set, or will my 862's be ok for the time being? i plan on cutting my teeth on the 4.8 for now and moving up to a 6.0 later on anyways. I want the car to run good tho, im not looking for 450 rwhp im looking to make closer to 575-600
I have bought a cam for my 4.8 here are the specs- 239/239 duration .623 .623 lift 115 lobe separation what valve spring do i need? I plan on turning this thing around 6800 rpm and running 15 psi boost, im looking at the kit from brian tooley racing good to .660 lift. What are your all's opinions