Numbers
Thread Starter
Pro
Joined: Jun 2007
Posts: 706
Likes: 0
From: Pensacola Fl
Numbers
13lbs, 9 degrees timing, ran out of fuel at 4500, couldn't take the car past it, need to tinker with pumps. 690/712. No Meth either.
Here is a video of the dyno pull where the belt shreds apart. I think it may have been too tight.
http://www.youtube.com/watch?v=1Q1mpRD6ILs
We were trying to mess with the fuel system in that video. The shop owner was trying to "dead Head", i think that's what it is called, the pumps. He was pinching off the return line to see if it changed. When we pinched it off, the pressure rose to 80, but it still dropped once over 4k RPMS. I am hoping its the pumps and I can just replace them and it will be good to go.
Here is a video of the dyno pull where the belt shreds apart. I think it may have been too tight.
http://www.youtube.com/watch?v=1Q1mpRD6ILs
We were trying to mess with the fuel system in that video. The shop owner was trying to "dead Head", i think that's what it is called, the pumps. He was pinching off the return line to see if it changed. When we pinched it off, the pressure rose to 80, but it still dropped once over 4k RPMS. I am hoping its the pumps and I can just replace them and it will be good to go.
Last edited by PhilsZ51; Dec 19, 2010 at 01:18 AM. Reason: added
Thread Starter
Pro
Joined: Jun 2007
Posts: 706
Likes: 0
From: Pensacola Fl
I am trying to make 800+ with this setup. The fuel pressure drops to 40 at 4500rpm. As far as the A/F goes, I am not 100% sure. I believe the tuner said that it dipped into the high 12s, or into the 13s. I think the fuel pumps might be going bad. They are bosch 44s, but I think they have had their better days. Going to replace the pumps and bring it back to the dyno on Wednesday, or Thursday. I will post a vid of it soon. The thing spun the tires on the first pull... never had that happen before. POWA!!!!
Drifting
Joined: Sep 2008
Posts: 1,389
Likes: 3
From: somewhere shooting my assault rifles
High 12's? Holy ** dude...
At least you have a year its easy to replace the in tank pump from below. My mid 03 just plain sucks big time and gotta pull the whole damn tank to get to it.
At least you have a year its easy to replace the in tank pump from below. My mid 03 just plain sucks big time and gotta pull the whole damn tank to get to it.
Thread Starter
Pro
Joined: Jun 2007
Posts: 706
Likes: 0
From: Pensacola Fl
That is why we got out of it as soon as we seen it go lean. Not exactly sure it went that high, I am just guessing. Prior to that, it was well within the safe A/F range. I have 2 external Bosch 44s that I can mess with, it is even easier; just have to pull the the rear wheel lining to gain access.
Melting Slicks
Joined: Mar 2008
Posts: 2,412
Likes: 4
From: Houston/Dayton Texas
stay with what you got... you will be happy you did...they have had more time to dial everything in... turbos don't always build boost, blowers do..better response..esp for a street car.
Last edited by joshtownsend; Dec 20, 2010 at 05:42 PM.
Corvette Stories
The Best of Corvette for Corvette Enthusiasts
Corvette ZR1X Will Be Pacing the Indy 500, And Could Probably Race, Too!
Verdad Gallardo
Top 10 Corvettes Coming to Mecum Indy 2026!
Brett Foote
Top 10 C9 Corvette MUST-HAVES to Fix These C8 Generation Flaws!
Michael S. Palmer
10 Revolutionary 'Corvette Firsts' Most People Don't Know
Joe Kucinski
5 Reasons to Upgrade to an LS6-Powered Corvette; 5 Reasons to Stay LT2
Michael S. Palmer
2027 Corvette vs The World: Every C8 vs Its Closest Competitor
Joe Kucinski
10 Most Common Corvette Problems of the Last 20 Years!
Joe Kucinski
5 MOST and 5 LEAST Popular Corvette Model Years in History!
Joe Kucinski
2027 Corvette Buyer's Guide: Everything You Need to Know!
Joe Kucinski
Thread Starter
Pro
Joined: Jun 2007
Posts: 706
Likes: 0
From: Pensacola Fl
On a good note. The car is making 700 wheel at 4500 rpm, and last night I took it for a rip to see how a quick blip of the throttle felt. I nailed it real quick and it just roasted the tires. I am not too sure what I would do with the added HP. I just might have to put the restrictor in to lower the boost a bit.