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  1. #1
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    14s possible tbi l31

    Hi all just wondering if this combo with drag radials eaton tru trac and and trac bars get me in too the mid low 14s in a 4000lb swb obs? 700r4 Tranny

    L31(stock)
    Edelbrock Performer 2116
    454 Tbi (supporting mods)
    Shorty Headers
    3" Y-pipe
    1.6 self aligning rockers
    S10 Stall
    Corvette Gorverner
    Shift kit/servo
    4.10 gears
    EBL Flash tuning
    Eaton Tru trac
    Assassin Tractionbars

    Let me know what you guys think dont care to get my feelings hurt.

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    Registered User southcarolina13's Avatar
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    Re: 14s possible tbi l31

    i would think so. a 2011 v6 mustang that weighs only like 500lbs less will do low to mid 13's stock.

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    Re: 14s possible tbi l31

    I was thinking maybe down 240rwhp at the most have over 300+TQ with traction and gear combo should put me in the high to mid 14s. Anybody with real world experience chip in?

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    Re: 14s possible tbi l31

    Should run 14's. I see a trans build coming up too.

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    Re: 14s possible tbi l31

    Quote Originally Posted by 1998454 View Post
    Should run 14's. I see a trans build coming up too.
    Or 4L80e with a 4.3 G-Van converter, but I am just weird. Back in the day I put a 4L60E in my old 88 2.8 S15 Jimmy and swapped in a custom chipped 7427 TBI PCM from a 95 Astro Van to run it.
    Last edited by Fast305; 08-21-2013 at 09:45 PM.
    1997 G1500, 5.7, 906s 2.02/1.60, GM 395' marine cam, 1.7 RR's, Marine Intake, BBK TB, 85mm MAF, 6.5 aircleaner, Thorley Tri-Ys, Thunderbolt 2.5 cats, Dynomax 22865 muffler, 4L80E, 0411, Hydroboost, 9.5" 14-bolt 3.73s, 8800 GVW front calipers, March 4490 pulleys, AD244 alt, D-Max fan

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    Re: 14s possible tbi l31

    Quote Originally Posted by tolow4phathoes View Post
    I was thinking maybe down 240rwhp at the most have over 300+TQ with traction and gear combo should put me in the high to mid 14s. Anybody with real world experience chip in?
    With good tuning and those bolt-ons I think 260 hp to the tires is doable. I have seen many stock L31s in the 200 rwhp range.
    1997 G1500, 5.7, 906s 2.02/1.60, GM 395' marine cam, 1.7 RR's, Marine Intake, BBK TB, 85mm MAF, 6.5 aircleaner, Thorley Tri-Ys, Thunderbolt 2.5 cats, Dynomax 22865 muffler, 4L80E, 0411, Hydroboost, 9.5" 14-bolt 3.73s, 8800 GVW front calipers, March 4490 pulleys, AD244 alt, D-Max fan

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    Registered User Doober's Avatar
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    Re: 14s possible tbi l31

    That stands to reason since they were rated at 255 and 15% loss is around 215.

    http://www.wallaceracing.com/et-hp-mph.php

    4000lbs. and 260rwhp puts you at 14.5, so if you're making 300 at the crank that's around where you should be.

    '92 Sierra (TBI 383/Vortecs/Comp 08-412-8/EBL/4L60/3.08s), '78 Malibu (Vortec'd 350/4-speed/2.29s), '87 Pontiac Fiero GT (2.8 v6/5-speed)


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    Re: 14s possible tbi l31

    If I could squeeze out between245-260 rwhp 320+tq with out a camshaft swap I would be very happy on a stock compression l31. Truck will only go to track maybe 3 times out of the whole year. just trying to have a mid 14s swb obs dd no cam swap if at all possible. I am thinking it is and hope to set out and reach that goal. WIll also be sprayed 100 shot on occasion will be rare though.

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    Re: 14s possible tbi l31

    Quote Originally Posted by tolow4phathoes View Post
    If I could squeeze out between245-260 rwhp 320+tq with out a camshaft swap I would be very happy on a stock compression l31. Truck will only go to track maybe 3 times out of the whole year. just trying to have a mid 14s swb obs dd no cam swap if at all possible. I am thinking it is and hope to set out and reach that goal. WIll also be sprayed 100 shot on occasion will be rare though.
    Considering I have seen an ECSB TBI run low 15s, with stock swirl port heads and a beyond weak Edelbrock 3702 cam, it is definately possible.
    1997 G1500, 5.7, 906s 2.02/1.60, GM 395' marine cam, 1.7 RR's, Marine Intake, BBK TB, 85mm MAF, 6.5 aircleaner, Thorley Tri-Ys, Thunderbolt 2.5 cats, Dynomax 22865 muffler, 4L80E, 0411, Hydroboost, 9.5" 14-bolt 3.73s, 8800 GVW front calipers, March 4490 pulleys, AD244 alt, D-Max fan

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    Re: 14s possible tbi l31

    Do you have a intake manifold you recommend for a otherwise tbi l31? Im thinking the Performer 2116 will do?

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    Re: 14s possible tbi l31

    Quote Originally Posted by tolow4phathoes View Post
    Do you have a intake manifold you recommend for a otherwise tbi l31? Im thinking the Performer 2116 will do?
    The 2116 runs out of steam faster than the stock cam does. I would look at the 7116 and give yourself room to grow. I am more of a fan of the 2912 however on a TBI, but tuning can present challenges on that one.
    Last edited by Fast305; 08-22-2013 at 05:39 PM.
    1997 G1500, 5.7, 906s 2.02/1.60, GM 395' marine cam, 1.7 RR's, Marine Intake, BBK TB, 85mm MAF, 6.5 aircleaner, Thorley Tri-Ys, Thunderbolt 2.5 cats, Dynomax 22865 muffler, 4L80E, 0411, Hydroboost, 9.5" 14-bolt 3.73s, 8800 GVW front calipers, March 4490 pulleys, AD244 alt, D-Max fan

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    Re: 14s possible tbi l31

    I didn't know they ever used an 80e behind a 4.3
    Quote Originally Posted by Fast305 View Post
    Or 4L80e with a 4.3 G-Van converter, but I am just weird. Back in the day I put a 4L60E in my old 88 2.8 S15 Jimmy and swapped in a custom chipped 7427 TBI PCM from a 95 Astro Van to run it.

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    Re: 14s possible tbi l31

    Quote Originally Posted by 1998454 View Post
    I didn't know they ever used an 80e behind a 4.3
    Yep 3/4 and 1 ton vans had the 4.3/4L80E combination. You could also get the 305 in front of one in the 2500 Express. The newer express vans run the 4.8/4L80E. The information I have found, suggests all 3 setups used the B82 high stall 4L80E converter.
    Last edited by Fast305; 08-22-2013 at 05:59 PM.
    1997 G1500, 5.7, 906s 2.02/1.60, GM 395' marine cam, 1.7 RR's, Marine Intake, BBK TB, 85mm MAF, 6.5 aircleaner, Thorley Tri-Ys, Thunderbolt 2.5 cats, Dynomax 22865 muffler, 4L80E, 0411, Hydroboost, 9.5" 14-bolt 3.73s, 8800 GVW front calipers, March 4490 pulleys, AD244 alt, D-Max fan

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    Re: 14s possible tbi l31

    Good info. That would be the trans to find at the parts yard, the 80e would have had a good stress free life behind a 4.3.
    Quote Originally Posted by Fast305 View Post
    Yep 3/4 and 1 ton vans had the 4.3/4L80E combination. You could also get the 305 in front of one in the 2500 Express. The newer express vans run the 4.8/4L80E. The information I have found, suggests all 3 setups used the B82 high stall 4L80E converter.

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    Re: 14s possible tbi l31

    7116? Im trying to have power from idle-5500 rpm and alot of low end tq and midrange power.

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    91 GMC Sierra ST gmc406's Avatar
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    Re: 14s possible tbi l31

    What's your altitude?

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    Re: 14s possible tbi l31

    500 ft. above sea level.

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    Re: 14s possible tbi l31

    Quote Originally Posted by tolow4phathoes View Post
    7116? Im trying to have power from idle-5500 rpm and alot of low end tq and midrange power.
    Trust me on it I ran the intake you have in mind and two others after that. The performer rpm will still snap your neck back and breathe past the cams useable powerband. I have used them on stock stalled and geared 305 powered vehicles.
    1997 G1500, 5.7, 906s 2.02/1.60, GM 395' marine cam, 1.7 RR's, Marine Intake, BBK TB, 85mm MAF, 6.5 aircleaner, Thorley Tri-Ys, Thunderbolt 2.5 cats, Dynomax 22865 muffler, 4L80E, 0411, Hydroboost, 9.5" 14-bolt 3.73s, 8800 GVW front calipers, March 4490 pulleys, AD244 alt, D-Max fan

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    91 GMC Sierra ST gmc406's Avatar
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    Re: 14s possible tbi l31

    If you haven't had it dyno'd, don't guess at your power level. You may walk away very dissapointed.

    I think 14's is a stretch, IMHO.

    When you going to the track?

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    Registered User Doober's Avatar
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    Re: 14s possible tbi l31

    Track doesn't lie, you can calculate HP from MPH or ET and weight. I calculated mine to about 155hp at the crank, after figuring altitude and 15% driveline loss. This was in 2010 at SIR in Tucson.

    '92 Sierra (TBI 383/Vortecs/Comp 08-412-8/EBL/4L60/3.08s), '78 Malibu (Vortec'd 350/4-speed/2.29s), '87 Pontiac Fiero GT (2.8 v6/5-speed)


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