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Restricted User
Joined: Mar 2014
Posts: 7,192
Likes: 109
From: Ohio
Way too much cam for a 600hp 4.8.
Just boost the stock engine. Throw an On3 7665 on it. It'll spool quick and make good power. From there you can do upgrades as you wish. No point in going all-in on your first build. There will be problems. Dont spend more money than you have to the first time around.
Just boost the stock engine. Throw an On3 7665 on it. It'll spool quick and make good power. From there you can do upgrades as you wish. No point in going all-in on your first build. There will be problems. Dont spend more money than you have to the first time around.
TECH Addict
Joined: Jul 2013
Posts: 2,189
Likes: 123
From: Portland, Oregon
The motor probably has enough miles on it to loosen up the rings, so you don't have to worry about that. New valve springs and injectors are all you really need. The stock intake, stock cam, and stock rotating assembly will all be fine for those power levels. Throw a cheap turbo on there and drive it.
Thread Starter
Registered User
Joined: Mar 2016
Posts: 8
Likes: 0
The motor probably has enough miles on it to loosen up the rings, so you don't have to worry about that. New valve springs and injectors are all you really need. The stock intake, stock cam, and stock rotating assembly will all be fine for those power levels. Throw a cheap turbo on there and drive it.
Motor had 250,xxx
I wouldn't touch the rotating assembly. I would put a cam/springs in it and go. I had a 220k 4.8 in my car all last year and it never missed a beat. 14-20 lbs of boost for 2500 hard miles and it was still running fine when I pulled it out a few months ago.
TECH Apprentice
Joined: Dec 2004
Posts: 358
Likes: 1
I'd hone it and throw some fresh rings abd bearings in it.
250k is alot of miles and I'd be surprised if it has good cyl sealing
putting a turbo on a worn out engine isn't a good idea.
If I was going to boost a stocker, I'd look for a bit fresher short block than that.
250k is alot of miles and I'd be surprised if it has good cyl sealing
putting a turbo on a worn out engine isn't a good idea.
If I was going to boost a stocker, I'd look for a bit fresher short block than that.
There's no reason for any of this work. If anything, valve seals, springs and a cam and slap it back together. There's been too many builds identical to what the OP is trying to achieve that have succeeded with less. I don't think I've read a single JY turbo build that was done where someone had to yank the motor because it was worn out.
Restricted User
Joined: Mar 2014
Posts: 7,192
Likes: 109
From: Ohio
Don't listen to him. Just boost the stock motor.
