Does a stock L31-R crate tune already exist?
#1
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Car: 1991 Z28
Engine: L31-R 350 w/ EBL P4
Transmission: 700R4
Axle/Gears: 2.73
Does a stock L31-R crate tune already exist?
I'm looking into doing an engine swap soon and I want to keep the TPI on my car both for emissions and for familiarity reasons. The L31-R Vortec crate motor is really catching my eye as a perfect swap candidate, so I'm trying to research what I will need to do to get the computer up to snuff. Then it dawned on me today: I wonder if there is a tune out there somewhere that someone has already put together for this crate motor. It seems like a fairly popular swap candidate and I don't plan to change anything on the crate motor itself (keeping it stock).
If no one knows of a tune that exists for this motor, what is the stock 350 binary for my year? I can't seem to figure out which combination of letters is the binary I'd want. Does anyone also know how far off I'd be from a good tune with the stock 350 tune? A ballpark estimate would be great to know how much work I'd be in for rolling my own tune.
If no one knows of a tune that exists for this motor, what is the stock 350 binary for my year? I can't seem to figure out which combination of letters is the binary I'd want. Does anyone also know how far off I'd be from a good tune with the stock 350 tune? A ballpark estimate would be great to know how much work I'd be in for rolling my own tune.
#3
Member
Re: Does a stock L31-R crate tune already exist?
The L31r was not emission tested in the 1/2 tons, it was only available in 3/4 and up. The only difference is the hardened exhaust seats and 4 bolt main.
OP, I have 2 but one is on the stand and neither are fuel injected.
OP, I have 2 but one is on the stand and neither are fuel injected.
#4
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Re: Does a stock L31-R crate tune already exist?
You can also look into the Marine Vortec engine as well. It has more hp due to a different cam.
http://www.ebay.com/itm/Reman-5-7L-3...BVmWyY&vxp=mtr
http://www.ebay.com/itm/Reman-5-7L-3...BVmWyY&vxp=mtr
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Car: 87 IROC
Engine: L31 350
Transmission: T56
Axle/Gears: 4.10 D44
Re: Does a stock L31-R crate tune already exist?
FYI, An EBL-P4 is on my very short list of needed items to get my L31/TPI/LT4HOT cam engine up and running.
#7
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Car: 1983 G20 Chevy
Engine: 305 TPI
Transmission: 4L60
Axle/Gears: 14 bolt with 3.07 gears
Re: Does a stock L31-R crate tune already exist?
I have the marine cam, marine intake and 2.02/1.60" valves in a set of milled vortecs. It is quick for being in a 3-ton brick of an Express van.
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