85 Fuel lines
Pro
Joined: Aug 2020
Posts: 647
Likes: 126
From: Liliha Bakery stuffing my face with coco puffs!
Seem to recall the earlier l98s had 2 different size fittings, larger being the pressure side. Later years both fittings where the same. Idk seems like a 2 second prime from the ecm should be enough to determine which is which.
Thread Starter
Drifting
Joined: Jun 2012
Posts: 1,391
Likes: 73
Building car from scratch so I can perform that test at this point. Someone cut the upper line which I believe is the one with the filter and pressure. Are hose clamps and rubber hose enough to hold the fuel pressure or is the pressure to great for that?
Pro
Joined: Dec 2021
Posts: 547
Likes: 230
Way too much pressure for clamps and rubber hose unless the hard line is flared properly and you use fuel injection rated hose.
Thread Starter
Drifting
Joined: Jun 2012
Posts: 1,391
Likes: 73
Well you mention WAY too much pressure BUT the pressure line coming out of the pump at the sending unit has a rubber hose and clamp. I see alot of high pressure fittings and
hoses in the system but when it comes to that point its a hose clamp.
hoses in the system but when it comes to that point its a hose clamp.
Pro
Joined: Dec 2021
Posts: 547
Likes: 230
The key there is the factory flared hard line and the fuel injection rated hose. You mentioned that the original fitting was cut off, so that tells me it's most likely a plain end and not properly flared. 46 psi will blow any hose right off the end of a plain, straight line. It can work if the hard line is flared.
Drifting
Joined: Jun 2020
Posts: 1,707
Likes: 734
From: Stay dangerous my friends
Idea: Run -8AN PTFE line with braided nylon and braises steel, all the way from the pump fitting to the fuel rail, and install a -8AN filter in line at original filter location. I think it's about $60-80 for lines/fitting. Do not use non-ptfe for fuel.
Oil Producer
Joined: Apr 2014
Posts: 9,371
Likes: 2,736
an 86 i had had copper line ran and connected to the old steel line with rubber. there was no possible way for it to be blown off from 40psi. that small stretch of rubber line had cracked and was leaking however. scared me one day came into shop an was a serious gas odour.
carefully cut new fuel grade rubber line to length and had my wife ready with fire extinguisher. wasnt a big deal and i tracked that car. i cut the line longer for more overlap and doubled up the clamps.
im not saying do it but in a pinch it works
Corvette Stories
The Best of Corvette for Corvette Enthusiasts
Top 10 Most Expensive Corvettes Ever Sold on Bring A Trailer
Brett Foote
10 Things Every Corvette Owner Needs (2026 Edition)
Michael S. Palmer
8 Most "Only Corvette Owners Understand" Quirks and Problems
Pouria Savadkouei
10 Reasons the C6 Z06 is Still A Performance Benchmark After 20 Years
Joe Kucinski
How Much Horsepower Every Corvette Engine "LOST" in 1972
Joe Kucinski
Top 10 DOs and DON'Ts for Protecting Your Convertible Top!
Michael S. Palmer
Top 10 Most Explosive Corvettes Ever Made: Power-to-Weight Ratio Ranked!
Joe Kucinski
150 hp to 1,250 hp: Every Corvette Generation Compared by the Specs That Matter
Joe Kucinski