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1974 From Carb to Finally Sniper EFI

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Old 02-09-2018, 10:27 PM
  #61  
calwldlife
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fuel injection in my other cars has spoiled me.
choke cycles on carbs can be a pain.

as far as installing one,
you have to be comfortable with working with fuel lines, pumps, hoses that
get the gas to the injectors.
can be a pain.

then the actual removing the carb and bolting on the throttle plate.
new fuel line connections.

then the electrical, you have to be able to mount the controller and get it ground and power. run wires, connect some safety cutoff, oil pressure switch,
find the proper power lead in the car the is keyed.
takes knowledge of your cars wiring.

plan plan plan. good luck
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Old 02-13-2018, 07:11 PM
  #62  
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Originally Posted by redcruz1120 View Post
Suggest to post another vid. Sound quality sucks
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Old 02-13-2018, 08:15 PM
  #63  
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Originally Posted by redcruz1120 View Post
Thats right.! I stopped ny my local muffler shop and purchased a bung and had it welded in place. I drilled a 1" hole and it fit properly on the lip of the bung. Although I didnt try them, the clamps for the included O.Sensor plate seem too small to wrap around the sidepipe collector..


This is what I used to cut the 1 inch hole
Thanks for the info!

One more question:
Was the O2 sensor wiring harness long enough, or did you have to extend it?
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Old 02-14-2018, 04:02 AM
  #64  
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Originally Posted by Oldguard 7 View Post
Suggest to post another vid. Sound quality sucks

Sure thing! you got it!!
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Old 02-14-2018, 04:05 AM
  #65  
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Originally Posted by wendellp601 View Post
Thanks for the info!

One more question:
Was the O2 sensor wiring harness long enough, or did you have to extend it?
No worries,!...Plenty of Harness! I actually just looked at it earlier and I will have to bundle some of it and tie-wrap.
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Old 02-14-2018, 04:11 AM
  #66  
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Originally Posted by redcruz1120 View Post
No worries,!...Plenty of Harness! I actually just looked at it earlier and I will have to bundle some of it and tie-wrap.
Cool!

Thanks again!
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Old 02-14-2018, 04:16 AM
  #67  
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My just installed pressure gauge !


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Old 03-11-2018, 05:29 PM
  #68  
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Redcruz
Well it has been about a month since your last post and just wanted to follow up. I'm going to use the LS filter/regulator also and am eager to see how it is working out. Have you had the opportunity to put some miles on it yet? Does the filter/regulator do what you were expecting and would you do anything different? Thanks
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Old 03-11-2018, 11:37 PM
  #69  
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Could you post a clear photo showing where you located the sensor on the side pipe?
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Old 03-13-2018, 09:51 AM
  #70  
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Originally Posted by flyeri View Post
Redcruz
Well it has been about a month since your last post and just wanted to follow up. I'm going to use the LS filter/regulator also and am eager to see how it is working out. Have you had the opportunity to put some miles on it yet? Does the filter/regulator do what you were expecting and would you do anything different? Thanks
I've only put about 50 miles on it but I can tell you this so far. It was worth It!! Immediate start ups and awesome response. I'm still running My GM style HEI and I don't see myself upgrading to the Holley dual sync distributor or ME" having any need to just yet. The regulator/ filter is working marvelous and is pushing between 60and 70 psi as per the inline gauge I installed close to unit. It's really hard to tell cause the needle rapidly fluctuates between those numbers while running. as for what I would do different? I would have to say Bench Test the fuel pump while in tank before mounting the tank. I got a hold of a bad fuel pump and had to pull tank out twice. The Verdict?..I'm very satisfied!!
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Old 03-13-2018, 10:01 AM
  #71  
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Originally Posted by Aggitated Monkey View Post
Could you post a clear photo showing where you located the sensor on the side pipe?


I can take more pics later , but the seam to the upper left side is the sidepipe and the upper right is the frame.
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Old 03-14-2018, 09:01 AM
  #72  
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Originally Posted by redcruz1120 View Post
I've only put about 50 miles on it but I can tell you this so far. It was worth It!! Immediate start ups and awesome response. I'm still running My GM style HEI and I don't see myself upgrading to the Holley dual sync distributor or ME" having any need to just yet. The regulator/ filter is working marvelous and is pushing between 60and 70 psi as per the inline gauge I installed close to unit. It's really hard to tell cause the needle rapidly fluctuates between those numbers while running. as for what I would do different? I would have to say Bench Test the fuel pump while in tank before mounting the tank. I got a hold of a bad fuel pump and had to pull tank out twice. The Verdict?..I'm very satisfied!!
Great to hear you are satisfied, I'm putting one on my 67 Camaro this weekend. Thank You for posting the results !!!!!!
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Old 03-22-2018, 06:03 PM
  #73  
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What throttle linkage bracket works best for the efi? I dont have my previous bracket so Iím looking for the correct one and manifold stud length.
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Old 03-22-2018, 11:38 PM
  #74  
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on mine efi I had server options to choose from. used a feeler gage measure the thread depth in manifold and the flange on the efi and subtract a couple threads you should be good Vette mag had a story on putting a efi on in the tech story
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Old 03-24-2018, 11:55 AM
  #75  
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Originally Posted by Johnnypegs View Post
What throttle linkage bracket works best for the efi? I dont have my previous bracket so Iím looking for the correct one and manifold stud length.
I used the one that came with the system. It works with my new original style cable! You can Adjust the position to obtain WOT and no more than that.!
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Old 03-24-2018, 04:21 PM
  #76  
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Originally Posted by redcruz1120 View Post
I used the one that came with the system. It works with my new original style cable! You can Adjust the position to obtain WOT and no more than that.!
Thanks! I didnt Realize it came with the kit. I even Called Holley and they didnít even mention it! Love your Vette.
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Old 04-29-2018, 04:30 PM
  #77  
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I am in the middle of installing a Sniper with the same Holley gas tank you are using into my 73. bought a 74 vented cap and it works just fine. I am also going to use the existing rollover valve and canister vent system. The 2 hard lines you have coming from the fuel pump on the tank, did you have those made or can I buy them premade or??? That would make my life easier. Thanks!
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Old 04-29-2018, 04:51 PM
  #78  
1moore522
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Vented cap wasn't from a 74, don't really remember but it worked. 2nd question, you changed from the Tanks inc regulator to a Holley? Which part number Holley did you go to? Also you just left the return port on the Sniper capped? Thanks!
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Old 04-29-2018, 06:43 PM
  #79  
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Originally Posted by 1moore522 View Post
Vented cap wasn't from a 74, don't really remember but it worked. 2nd question, you changed from the Tanks inc regulator to a Holley? Which part number Holley did you go to? Also you just left the return port on the Sniper capped? Thanks!
No I used the filter regulator from tanks inc. LS9904.. I bought a tube bender from Harbor Freight and bent the tubes myself. not hard. the tank Holley sells is from tanks inc. and yes, I capped off the regulator at unit!
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Old 04-29-2018, 07:52 PM
  #80  
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What did you fab the lines out of?
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