Tryin to get some ideas of what kind of cost I may be looking at if I do go FI. My 5.3 is almost to 160k now, any reccomendations of what would need to be done (engine wise) to handle up to 10lbs? I know tranny and rear will need some beefing and fuel system to support. The truck has felt a little sluggish down low lately and im thinking maybe its gettin tired out.


thanks.

 

Might be losing compression because of all the wear and tear on it. That means boost will be pushing past the rings, too. I would do a compression check...

 

what he said! lol

 

I had a s/c from 50k-120k. Swapped to a t/c at 120k. Do a compression test. If it looks good boost away.

 

"The truck has felt a little sluggish down low lately and im thinking maybe its gettin tired out."
You already answered your own question. FI is tough on perfectectly running engines. Drop in a used, low mile 5.3l or 6.0l and then start the FI stuff.

Rick

 

First motor I ever turboed was a 180k mile 2.8 v6 S-10. It loved it! 6psi of boost for 10k miles before I sold it.

 

well i guess worst case, i just buy another used engine (in good shape of course) and boost away. lol.

 

motors dont know mileage they know abuse. I wouldnt be afraid of boosting a motor with high miles as long as it checks out fine

as for little low on compression what do you think boost likes? do as the honda guys less compression more boost till it lets go

 

Like said, do a comp test, I have seen a 6.0 with 183k that you could still see very slight crosshatching in the cylinder walls still, but have seen a 5.3 with less than 100k with a ton of blowby. If your motor checks out ok, go ahead and throw 7-8 psi at it and i bet it will last a long time. A buddy of mine has had a procharger on his 5.3 since it had 6k on it, now has over 200k hard miles and still runs well.

 

Ya I think Ive decided thats pretty much what im gonna do, run 6ish to start it in, bump to 8 after a few months and see where that gets me and go from there, 10 for special days lol