RacerXLs1

iTrader: (14)

Like the title says, what would you replace on a LS2 Longblock.. The motor has 15,000 miles on it. Car will have a 76.or 78 mm turbo on it. Liking to get around 700 at the tire, with a good turbo and tune.. This is what I'm thinking...

1) Blower Cam
2) ARP Rod bolts
3) Maybe a timing chain or oil pump?
4) Super victor Jr ( I already have)

What do u guys recommend? This is my first motor build, and I don't want this thing to come apart... Thanks Andrew

Danny

iTrader: (16)

Since you already have the motor out, why not invest in a good set of rods and pistons. Just keep the stock crank. This way you will have more room to grow, should you decide to.

Mike454SS

iTrader: (4)

I'd go this far too...plus, setting the ring gap correctly is nice for piece of mind under boost...the stock bottom ends are pretty dam strong, but I'd rather KNOW the ring gap is right if I'm going to push it that hard, with that much potential for heat in the cylinders.

RacerXLs1

iTrader: (14)

I'm paid $1500 for the long block.. And funds are kinda tight now... Othe wise I would..

Mike454SS

iTrader: (4)

Well...honestly...if you are intending to turbo it...I would not use a blower cam, and I wouldn't worry about rod bolts either. That's an RPM thing, not a power thing...on the combustion stroke the rod bolts are just along from the ride...the hardest moment of their life is when they have to turn the piston around after the exhaust stroke and yank it back down for the intake stroke.

A blower cam and a turbo will not be the ideal combo...I'd leave the stock cam...or go for something with a wider lobe seperation than the typical blower and NA grinds. If you're going to swap the cam, that's when I'd put in a C5-R chain...more expensive than some other options, but they are an excellent chain and you need not worry about them. LS2 should already have a chain dampener.

I've seen a lot of people swap to the Melling high volume pumps with success lately...I've never had a problem with a stock pump myself, plus 15K miles is practically nothing.

......so all that said, if it were mine...and funds were tight...I'd buy the C5-R chain from Katech, new stock timing sprockets from GM, I'd upgrade the valve train...replace the GM head bolts with some ARP parts, and invest everything I had left in fuel system...forced induction can get into a situation of needing a lot of fuel FAST...you want to be POSITIVE your pump/lines/regulator setup is up to par, and you want to know you've got enough injector...that before anything else.

litle88

iTrader: (20)

I agree, 700hp fi? It's gonna be more expensive if those stock parts decide to stage left!

I would do it once and do it right if your going to push it that much. In the long run you'll be saving money. All you need are rods and pistons.

RacerXLs1

iTrader: (14)

Rods and pistons are out of questions..lmi wish guys but I'm saving for a house so I can't..

Mike454SS

iTrader: (4)

Then don't put a turbo on it...just buy your house...cars are fun, but priorities matter...the few thousand you should spend on the car overall for a turbo setup...you'll thank yourself for making your down payment on the house that much higher instead.

redtan

iTrader: (5)

Funds are going to be even more tight when you blow a hole through your pistons/block from having 700rwhp on a stock rotating assembly.

You'll be able to run it at that level for a little bit, but it's a ticking time bomb and if it blows up next month it will cost you more to rebuild the engine than it will cost you today to build it up to withstand that kind of power.

It's up to you really, but don't expect that kind of power to be held reliably for the next 50k+ miles.

RacerXLs1

iTrader: (14)

I'm going to try it out in the 550 horsepower range, and see where that get me.. I appreciate everyone's in put.. Do you guys thing I should do head bolts or studs.. Thanks Andrew

litle88

iTrader: (20)

You won't be able to get the heads off in the car if you get studs. I'd just get the bolts.

RacerXLs1

iTrader: (14)

Yea thats what I was thinking. What do you think about the pt 7675 cea.. Thik it will work good? Thank Andrew

RacerXLs1

iTrader: (14)

Bump it up.....

4doortypels

iTrader: (39)

LS9 cam resized ls2 fuel injectors... new pushrods and springs. running 8 lbs should be pretty reliable and mid 500 to the wheels... arp head bolts if you pull the heads for any reason... very budget friendly and reliable... other than that the block motor should be fine.

Matt0matic

Have you guys ever used head studs? Remove the nut then the stud itself comes out just as easy as the bolts. And with an alloy block I'd do the studs.

litle88

iTrader: (20)

I think that it's a 1500.00 dollar 76mm turbo that I think you'll be going about it the wrong way. That's not including am inter cooler, tubing, fuel system etc etc. it's just me man we see it all the time where a guy pushes the envelope on a sbe car and then he's back on asking what happened.

So bottom line is yes a 76mm would be nice on a forged ls3 lol

SnIpEz

iTrader: (4)

To be honest, I would buy the house first then come back to the project when you have more money to put into it and are completely ready. If 700 at the wheels is the ultimate goal it costs a pretty penny.

RacerXLs1

iTrader: (14)

Yea all I need is the fuel system. I cant get my new house cause of personal reasons. . I have money saved up for that so, I'm not to worried about it.. But yea

RacerXLs1

iTrader: (14)

Yea I've been doing some research and im goin to have to lower my power level down a little...

litle88

iTrader: (20)

LOL there you go! Just get a NICE set of heads and a good cam along with all the supporting mods maybe some suspension and or driveline mods and have fun with it til after you get your house so you can build it in YOUR garage Just tryng to give you a lil friendly advice lol and not make the same mistakes as some of US have commited LOL see you around this summer soooon.