LS based EFI on old school sbc?
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Joined: Dec 2006
Posts: 274
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From: Hoffman Estates Il
Car: '88 IROC T5 Vert ‘13 Vette
Engine: 305 TBI
Transmission: T5
Axle/Gears: 3:08
LS based EFI on old school sbc?
Greetings NASA scientists,
Not sure if I'm in the correct forum.
For a digital tuning illiterate, is it possible to convert a old school sbc to a factory LS-based fuel injection system using the EFI Connection Co. 24X sbc crank sensor etc in the timing cover, an aftermarket single plane with injector bosses, some kind of throttle body, an LS ECM, a standard non computer HEI distributor(like Sniper EFI does)?
Procure the correct components, then bring it all to get tuned at a local shop.
Seems there's perpetual 90% "mostly" complete issue with the aftermarket self learning EFI's, not to mention the reliability compared the the factory stuff....at least in everything I've been reading.
This would be for a street L31 or hopefully a 400sbc.
Thank you
Not sure if I'm in the correct forum.
For a digital tuning illiterate, is it possible to convert a old school sbc to a factory LS-based fuel injection system using the EFI Connection Co. 24X sbc crank sensor etc in the timing cover, an aftermarket single plane with injector bosses, some kind of throttle body, an LS ECM, a standard non computer HEI distributor(like Sniper EFI does)?
Procure the correct components, then bring it all to get tuned at a local shop.
Seems there's perpetual 90% "mostly" complete issue with the aftermarket self learning EFI's, not to mention the reliability compared the the factory stuff....at least in everything I've been reading.
This would be for a street L31 or hopefully a 400sbc.
Thank you
Joined: Sep 2003
Posts: 25,895
Likes: 429
From: Pittsburgh PA
Car: 89 Iroc-z
Engine: 555 BBC Turbo
Transmission: TH400
Axle/Gears: MWC 9” 3.00
Re: LS based EFI on old school sbc?
Yes i have done it. Efi crank reluctor ring, L31 timing cover, efi 1x cam dizzy. 0411 pcm from ls1 car. And harness which i modified as necessary to fit in the car right. Ls truck coil packs
Joined: Mar 2017
Posts: 4,255
Likes: 427
From: Portland, OR
Car: 86 Imponte Ruiner 450GT, 91 Formula
Engine: 350 Vortec, FIRST TPI, 325 RWHP
Transmission: 700R4 3000 stall.
Axle/Gears: 9 Bolt Torsen 3.70
Re: LS based EFI on old school sbc?
Not really any different than using an easier solution like my LINK ECU adapter that allows me to run full sequential by adding 6 wires and can then be tuned on the dyno. I'm currently using the Holley/MSD Dual Sync distributor. If I wanted to mount a crank trigger I could run full COP ignition but I don't currently see the need for it.
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