stock 5.3 vs stock LQ4, which is better for high boost?
#42
In the end, I do plan on running E85, probably still an FMIC, but I don't think meth will be needed at that point.
Okay, but why? I appreciate the input, but be specific in your reasoning.
#43
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Well, I have been a big fan of meth injection with intercooling (have done it for years). E85 and different blends, and different tuning with those blends never really sounded too appealing. But after talking with you and Beast a bit, you have converted me. I wish there was someplace in Columbia City that sold it, but there is a station in between the Fort and CCity that isn't too far away.
In the end, I do plan on running E85, probably still an FMIC, but I don't think meth will be needed at that point.
Okay, but why? I appreciate the input, but be specific in your reasoning.
In the end, I do plan on running E85, probably still an FMIC, but I don't think meth will be needed at that point.
Okay, but why? I appreciate the input, but be specific in your reasoning.
#44
If I end up running the PT7675, it seems (via skinnies) that the 5.3 will be the better suited engine as it will make more power on it than the larger 41 cubic inch LQ4.
Now, my next question is; what about the S475? Would the S475 have any advantage on the LQ4 vs the PT7675 on the 5.3? I may be splitting atoms on this one.
The extra deck thickness on the 5.3 also seems to have its appeal.
#45
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Make more power with less boost yes. Hold that cylinder pressure better? No. The s475 could be configured to work better with the 6.0 as you could get it with the 96mm turbine and 1.32 ar turbine housing to work better with the larger displacement motor. Again, it is all about how the turbo is configured.
#47
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which is better for boost? how bout the cheaper engine? 5.3's are had from 150-300 bucks, while the 6.0's are getting 600-1000 for motors. 7675 will make good power on both, it may be a bit small for the 6.0 but it stills works good with it.
I may be partial to the 6.0/7675 since that is what i am running, but its hard to argue with 2-3 5.3's sitting around for back up for the same price as one 6.0.
I may be partial to the 6.0/7675 since that is what i am running, but its hard to argue with 2-3 5.3's sitting around for back up for the same price as one 6.0.
#49
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Burnt a piston in my LQ4, gonna try same setup with a 5.3 to compare
About a week and a half ago I burnt a piston in my JY 6.0. The fastest it went was 10.75 @ 131 in my 3600# cutlass. I'm gonna swap to a JY 5.3 with the same exact setup and compare the two.
Mods:
LS6 cam
Springs & pushrods to match
Victor Jr intake
750 blow thru carb
Garrett GT42-94R
Open 4" downpipe about 5 feet long.
It went 10.75 with a powerglide, car now has a th400
Anyone care to venture a guess of if I will gain or lose ET?
Mods:
LS6 cam
Springs & pushrods to match
Victor Jr intake
750 blow thru carb
Garrett GT42-94R
Open 4" downpipe about 5 feet long.
It went 10.75 with a powerglide, car now has a th400
Anyone care to venture a guess of if I will gain or lose ET?
#51
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I found a complete 5.3 iron block on craigslist for $250 then got a 5.3 L33 short block off ebay for $300 shipped. While it is frowned on by many I decided to go with 317 heads to drop compression down to around 9:1 since the L33 has flat top pistons and 9.9 compression stock. I did find a couple complete L33s (good heads too!) for around $1000 with under 100k miles on car-parts.com in my area.
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About a week and a half ago I burnt a piston in my JY 6.0. The fastest it went was 10.75 @ 131 in my 3600# cutlass. I'm gonna swap to a JY 5.3 with the same exact setup and compare the two.
Mods:
LS6 cam
Springs & pushrods to match
Victor Jr intake
750 blow thru carb
Garrett GT42-94R
Open 4" downpipe about 5 feet long.
It went 10.75 with a powerglide, car now has a th400
Anyone care to venture a guess of if I will gain or lose ET?
Mods:
LS6 cam
Springs & pushrods to match
Victor Jr intake
750 blow thru carb
Garrett GT42-94R
Open 4" downpipe about 5 feet long.
It went 10.75 with a powerglide, car now has a th400
Anyone care to venture a guess of if I will gain or lose ET?
There is no reason to go with a 6.0 with the power these 5.3's are making. You can buy 3 for the price of one 6.0. That 7675 would be perfect for a 5.3 and has the capability to make 900rwhp.
#58
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Check car-part.com if you haven't already.