The 1947 - Present Chevrolet & GMC Truck Message Board Network - Install thread- Holley EFI Sniper on '72 402 big block

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The 1947 - Present Chevrolet & GMC Truck Message Board Network (https://67-72chevytrucks.com/vboard/index.php)

- The 1967 - 1972 Chevrolet & GMC Pickups Message Board (https://67-72chevytrucks.com/vboard/forumdisplay.php?f=3)

- - Install thread- Holley EFI Sniper on '72 402 big block (https://67-72chevytrucks.com/vboard/showthread.php?t=755926)

mkmc69

09-17-2018 01:08 PM

Re: Install thread- Holley EFI Sniper on '72 402 big block

Quote:

Originally Posted by Ekliptix (Post 8346227)

I didn't have any fume issues with the in-cab tank while using a carb. There is still no fume issue now with the EFI. So far (500miles driving) I have had no issues using the in-cab tank with the EFI system. When I turn the key on and hear the pump prime, I can hear a little fuel coming from the return line into the tank, but it doesn't bother me and I can't hear it when the truck is running.

Thanks so much for the info. I'm trying to gather as much info as I can. Going to be installing a big block with the Holly Sniper system this coming winter.

C10_ustacould

10-23-2018 01:30 PM

Re: Install thread- Holley EFI Sniper on '72 402 big block

How do you have the TV (Throttle Valve) cable for the 700r4 connected to the throttle linkage? Many folks think the TV cable is a "kick down" cable but it is not. The pull on the TV cable is very important in controlling the pressures with the transmission and most throttle linkages don't have the correct geometry, if it isn't pulled in the correct way it can at the very least make it operate poorly and at worst burn it up. I had my unit shipped from FiTech to Bowtie Overdrives to be modified to work with their "TV Made Easy" system and it works very well. I was just curious about how yours was configured and if that might play into your 1/4 mile time.

Happy_dan

10-07-2019 09:49 PM

Re: Install thread- Holley EFI Sniper on '72 402 big block

What a great thread. Thanks for sharing it all!

Jetmech14

06-13-2023 11:35 AM

Re: Install thread- Holley EFI Sniper on '72 402 big block

Hey guys any update on this? I'm thinking of doing the Sniper kit and keeping the stock tank. Is there anything you would have changed or did differently now that you've been driving them for awhile? Thanks.

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