5.3L! To boost or not to boost
02-22-2015, 06:32 PM
#41
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I had planned to rebuild my grandfather's 67 impala but my father sold it while I was in college. Don't do the truck the way you want it. Do it the way he would have wanted it. It will likely mean more to you. Think about getting another project car to make your own. Just my humble opinion.
So are the Chinese turbos off eBay garbage? Severely mixed reviews.
02-22-2015, 10:10 PM
#42
I don't do turbos, maybe someone on here can help you. Bearings will likely be made in China no matter where the turbo is made
02-23-2015, 01:55 PM
#44
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The video I posted has a Precision turbo, so that isn't chinese.
As far as turbos go, $1,500 for that Precision PT 76/75 isn't a bad price. You can find them used for cheaper I'm sure.
Just spend a bit more on a quality turbo, not necessarily $1500, skip the chinese crap, and you have a sweet build.
02-23-2015, 02:49 PM
#45
The video I posted has a Precision turbo, so that isn't chinese.
As far as turbos go, $1,500 for that Precision PT 76/75 isn't a bad price. You can find them used for cheaper I'm sure.
Just spend a bit more on a quality turbo, not necessarily $1500, skip the chinese crap, and you have a sweet build.
As far as turbos go, $1,500 for that Precision PT 76/75 isn't a bad price. You can find them used for cheaper I'm sure.
Just spend a bit more on a quality turbo, not necessarily $1500, skip the chinese crap, and you have a sweet build.
02-24-2015, 11:51 AM
#46
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What about the ball bearing upgrade? For a non race street application, is it worth spending the extra money? Considering that upgrade nearly doubles the cost of the turbo?
02-24-2015, 01:01 PM
#47
When I was researching a primary interest for me was quick spool in a street application. BB was advertised to offer 5%-10% quicker spool with less resistance compared to a static bushing. Of course BB can last longer if made right but the out-of-the-box promise was quick spool. And on the street that is important. Race, you can just set the car up to run 3000-7000RPM and who cares about boost at 2000? That was 5+ years ago and I sold the project. What's the popular opinion out there now?
02-25-2015, 10:33 AM
#48
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I've read that the spooling at lower rpms is not an issue. I'm looking at the borg warner turbos. Seem to be cheaper and they are apparently just as high quality as the other manufacturers.
What kind of rear end do i put in this? Can I put a stock rear end off a different car? Which one? With the turbo, I'm looking around 500 to 600.
What kind of rear end do i put in this? Can I put a stock rear end off a different car? Which one? With the turbo, I'm looking around 500 to 600.
02-25-2015, 04:38 PM
#49
In what way is spooling at low RPMs "not an issue?" I've read that for $12 you can make your car run off of water...doesn't make it true. If someone tells you spooling at low RPMs is not an issue, either they are lying or they have a very well-spec'd and tuned turbo setup. (or a tiny turbo that spools very quickly but chokes on the top end)
That being said, lack of boost at lower RPMs IS less of an issue when you start with a relatively torquey V8 like an LS BUT getting the boost in earlier is going to make it a LOT more fun on the street.
Any mfg that builds stuff for big car mfgs is generally pretty good.
You've probably got a decent rear in there to build. Easiest way is to count the bolts on most GMs.
That being said, lack of boost at lower RPMs IS less of an issue when you start with a relatively torquey V8 like an LS BUT getting the boost in earlier is going to make it a LOT more fun on the street.
Any mfg that builds stuff for big car mfgs is generally pretty good.
You've probably got a decent rear in there to build. Easiest way is to count the bolts on most GMs.
02-25-2015, 05:03 PM
#50
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I should've chosen different words I suppose... I meant it's not as much of an issue now as it was 5 years ago. I don't see it as "an issue" but that's just me I suppose.
02-26-2015, 08:44 PM
#51
I think it should still be a concern..I just meant that folks may be using different strategies to overcome. Any way you do it, turbo V8 is badass. Lot of room under the hood of a Jeep...but the new engine has almost 11:1 already so will have to likely do L92 top end first to get the CR down. But two small-ish turbos would be insane in a 3000-lb vehicle. So who knows. After I figure out the T56.
02-28-2015, 05:24 PM
#53
You've got a good rear to start with if it isn't making any real bad noises and doesn't have a lot of slack in it. Likely have a Turbo 400 transmission which is easy to mate to a LS engine. If you don't care about long trips and good gas mileage, you could just freshen all of that up a bit. Or is it a stick? 3.73 is not a bad gear..good all-around ratio.
That's a mid-weight truck and 4x4 adds to that. I'd consider a 6.0 of you can swing the $. More low-end to get things moving. I can't remember from the start of the thread if you already purchased an engine?
That's a mid-weight truck and 4x4 adds to that. I'd consider a 6.0 of you can swing the $. More low-end to get things moving. I can't remember from the start of the thread if you already purchased an engine?
03-01-2015, 11:28 AM
#55
It can be built to make decent power but the design is 70 years old. Much more bang for your buck with LS. A stock 6.0 will make twice the power of that 400 if not more. A few bolt-ons and you get the idea.
I'd clean it and tune it up but beyond that I wouldn't put any money into it. If it runs reasonably you can probably get a couple hundred bucks for it to the right person.
I'd clean it and tune it up but beyond that I wouldn't put any money into it. If it runs reasonably you can probably get a couple hundred bucks for it to the right person.
03-01-2015, 04:59 PM
#56
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It can be built to make decent power but the design is 70 years old. Much more bang for your buck with LS. A stock 6.0 will make twice the power of that 400 if not more. A few bolt-ons and you get the idea.
I'd clean it and tune it up but beyond that I wouldn't put any money into it. If it runs reasonably you can probably get a couple hundred bucks for it to the right person.
I'd clean it and tune it up but beyond that I wouldn't put any money into it. If it runs reasonably you can probably get a couple hundred bucks for it to the right person.
