Sniper efi Quadrajet

Slowpoke

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Mar 28, 2021
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How's it going everyone ? So my question is has anyone installed a holley sniper Quadrajet on a 86-87 307 ? I guess my question really is will a 70s Quadrajet non emmission work on a 86 emmission intake manifold ? I ordered the sniper kit thinking nothing of it but when watching one of the holley videos the guy says 65-79 but nowhere else does it mention this when ordering. Now I'm wondering if it will even work or if he only mentions that do to non emissions. Much appreciated for any info .
P.s I emailed holley too but figured is see if anyone here would know.
 

Slowpoke

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Mar 28, 2021
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I believe you're correct and I see now for a emmission and ccc setups it requires a 1 inch spacer to to clear the throttle bracket from the egr on the manifold. The sniper is a hair wider than the oem Quadrajet
 

Olds 307 and 403

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Oct 4, 2018
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Melville, Saskatchewan
A one inch spacer isn't bad anyways, Transdapt sells a nice aluminum open 1" spacer. The 715 cfm rating should be perfect for a 307. Are you using the G body drop in tank fuel pump set up from Holley?
 

Slowpoke

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Mar 28, 2021
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I got the sniper efi conversion tank with the 255lph pump.
 

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Apr 12, 2021
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This information is gold. I have learned more about 80s emissions, pcms, air pumps, and egr systems in the last week than I ever cared to.

How are you planning on keeping the CELs at bay? I have found some information on potentially remapping the prom or paying someone to do it.

Alternatively I wonder if a person could figure out a way to remove the pcm from the air-conditioning relay system. You may be able to then just remove the pcm all together and leverage the Painless solution for the converter lockup in the 200-4r transmission. I think this would render the egr and air pump useless, but would pass a visual emissions equipment inspection.

Sorry if this is a thread jack.. I am debating on the sniper setup or the ccc quadrajet, I plan on leaving all emissions systems in place for a potential 383 build and want to keep the AC. And you are the first I found trying this!!
 

Slowpoke

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Mar 28, 2021
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This information is gold. I have learned more about 80s emissions, pcms, air pumps, and egr systems in the last week than I ever cared to.

How are you planning on keeping the CELs at bay? I have found some information on potentially remapping the prom or paying someone to do it.

Alternatively I wonder if a person could figure out a way to remove the pcm from the air-conditioning relay system. You may be able to then just remove the pcm all together and leverage the Painless solution for the converter lockup in the 200-4r transmission. I think this would render the egr and air pump useless, but would pass a visual emissions equipment inspection.

Sorry if this is a thread jack.. I am debating on the sniper setup or the ccc quadrajet, I plan on leaving all emissions systems in place for a potential 383 build and want to keep the AC. And you are the first I found trying this!!
No worries about a thread hijack we are all here to learn something. The sniper system is designed for vehicles without emmissions. I removed the egr and the hot air choke and made 2 block off plates from ¼ inch aluminum. I also removed the original computer and wire harness along with air pump ect.. The oem harness is a separate harness than the a.c and light harnesses. Once you remove the cc Quadrajet the factory ecu is pointless. The egr , air pump and any other emmission will not work anymore anyways. I did buy the tci lockup (not installed yet). As for the cel light I will remove the light bulb because it is not longer controlled by anything. I will now be using the 3.5 led display for gauges and any info needed. My sniper in completely installed now. I'm only waiting on the HyperSpark Distributor do to summit sending me a chevy distributor instead of the olds and then when I returned it they sent me a ford so now I'm waiting on the correct one for 3 weeks now lol... I

If you have any questions feel free to ask. I would've loved for some of this info when I was trying to start but took a leap of faith spending $3000 and not seeing anyone doing it prior too. I figured I'll be the huckleberry haha...
 

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