Will this work walbro 458 intank
Thread Starter
Instructor
Joined: Nov 2014
Posts: 238
Likes: 1
Will this work walbro 458 intank
i modified the stock bucket to make the 485 pump fit in there i was just wondering if it would work the way i did it or would i have to do something else or what did i do wrong? Thanks
Le Mans Master
Joined: Aug 2002
Posts: 8,472
Likes: 38
From: Houston TX
St. Jude Donor '11
That'll work. Couple things: The siphon pump that runs the venture pump to fill the bucket is disabled, but you don't care because the pump is going down past the bucket and sitting on the tank floor. More importantly though, the pump is going to overrun the stock regulator and fuel pressure will be elevated when the engine doesn't require lots of fuel. I used to run two 255's like you have your 458 and idle pressure was ~65# (IIRC) and would go down to ~55# at WOT (supporting ~900RWHP). It's not a huge deal IMO, but unless you tune it; your idle, off idle and cruise fuel trims may go rather negative. Which isn't a big deal either because negative fuel trims don't affect WOT fueling.
Le Mans Master
Joined: Aug 2002
Posts: 8,472
Likes: 38
From: Houston TX
St. Jude Donor '11
Sorry I didn't look at all the pics before. So you didn't cut the bucket. Without the Venturi pump running there won't be much except the one way valve at the bottom to fill the bucket. If still some holes in it.
Pro
Joined: May 2007
Posts: 532
Likes: 7
From: north vancouver british columbia
Looks fine to me I put a stock 255 or whatever we have plus this pump into mine and working no problem 
I'd use a new soc if I were you though that one looks kinda ronchy.
I use a fuel pressure regular upfront vacuum/boost referenced and the lpe block offs like u.
I'd use a new soc if I were you though that one looks kinda ronchy.
I use a fuel pressure regular upfront vacuum/boost referenced and the lpe block offs like u.
Thread Starter
Instructor
Joined: Nov 2014
Posts: 238
Likes: 1
yeah I did get a new sock and I'll post pictures of how it ended up later
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