Afr question...
Melting Slicks
Joined: Jul 2004
Posts: 2,844
Likes: 144
From: Northern Ireland
500 miles in stop/go traffic is very different than 500 miles mostly major roads though.
Hence a poor target
5 miles stuck in traffic could see more engagement/disengagement actions from the clutch than the main road 500 miles.
And ultimately it is that light slippage they want to see for any surfaces to bed into each other.
If the clutch is made correctly though, all surfaces will already be true and flat, so there should be almost no bed in time required.
Safety Car
Joined: Jun 2005
Posts: 4,977
Likes: 256
From: St. Louis Missouri
500 miles in stop/go traffic is very different than 500 miles mostly major roads though.
Hence a poor target
5 miles stuck in traffic could see more engagement/disengagement actions from the clutch than the main road 500 miles.
And ultimately it is that light slippage they want to see for any surfaces to bed into each other.
If the clutch is made correctly though, all surfaces will already be true and flat, so there should be almost no bed in time required.
Hence a poor target
5 miles stuck in traffic could see more engagement/disengagement actions from the clutch than the main road 500 miles.
And ultimately it is that light slippage they want to see for any surfaces to bed into each other.
If the clutch is made correctly though, all surfaces will already be true and flat, so there should be almost no bed in time required.
All of the manufacturers recommendations say the same thing re: stop/go driving.
There is no harm in following their recommendations. But if you don't, and you have a problem, they'll tell you it's your fault for not breaking in the clutch properly. Granted, I did have a clutch chew up my transmission in <200 miles with NO obvious side affects. I won't go 500 miles again without testing for dragging and making sure the shifter goes into gear cleanly at high RPM.
This school of thought is the same for brakes and fresh engines. Some say let 'er eat and they never have problems. Some say not to. It's your choice to error on the side of caution or not.
Thread Starter
Le Mans Master
Joined: Jan 2009
Posts: 5,656
Likes: 112
From: ocean springs mississippi
All of the manufacturers recommendations say the same thing re: stop/go driving.
There is no harm in following their recommendations. But if you don't, and you have a problem, they'll tell you it's your fault for not breaking in the clutch properly. Granted, I did have a clutch chew up my transmission in <200 miles with NO obvious side affects. I won't go 500 miles again without testing for dragging and making sure the shifter goes into gear cleanly at high RPM.
This school of thought is the same for brakes and fresh engines. Some say let 'er eat and they never have problems. Some say not to. It's your choice to error on the side of caution or not.
There is no harm in following their recommendations. But if you don't, and you have a problem, they'll tell you it's your fault for not breaking in the clutch properly. Granted, I did have a clutch chew up my transmission in <200 miles with NO obvious side affects. I won't go 500 miles again without testing for dragging and making sure the shifter goes into gear cleanly at high RPM.
This school of thought is the same for brakes and fresh engines. Some say let 'er eat and they never have problems. Some say not to. It's your choice to error on the side of caution or not.
Thread Starter
Le Mans Master
Joined: Jan 2009
Posts: 5,656
Likes: 112
From: ocean springs mississippi
Im about to tune my car....thinking of doing wideband and fuel press on A pillar pod ....is an analog fuel pressure output needed for HP tuner (remote tune) or do you just go by wideband?
Last edited by C U IN REARVEIW; May 5, 2018 at 10:28 PM.
Safety Car
Joined: Nov 2007
Posts: 4,433
Likes: 873
From: Bay Area CA
Follow Mantic dual disc 500 mile break in period procedure, I did and my Mantic 9000 continues to be flawless 15,000 miles later!
Last edited by Mike's LS3; May 6, 2018 at 12:29 AM.
Race Director
Joined: May 2004
Posts: 16,667
Likes: 1,209
From: Raleigh, NC
St. Jude Donor '15
Most just go by wideband but more data isn't going to hurt. You'd have to add a 0-5V pressure sensor to wire into HPTuners for it to be able to read that. These cars don't have any sort of fuel pressure sensor from the factory so HPT can't read it unless you add one
Corvette Stories
The Best of Corvette for Corvette Enthusiasts
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
8 Coolest Corvette Pace Cars (and Replicas) of All Time
Verdad Gallardo
Top 10 Corvette Engines RANKED by Peak Torque (70+ Years of Muscle!)
Joe Kucinski
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
Thread Starter
Le Mans Master
Joined: Jan 2009
Posts: 5,656
Likes: 112
From: ocean springs mississippi
Im using the sensor you told me about from casper electonics. Hooks to schrader valve on rail...going to holley fuel rails,so not sure how im going to make it work? Running a dual walbro 450's intank setup....so shouldn't have any fuel/pressure issues i hope.
Last edited by C U IN REARVEIW; May 7, 2018 at 11:13 PM.
Thread Starter
Le Mans Master
Joined: Jan 2009
Posts: 5,656
Likes: 112
From: ocean springs mississippi
**UPDATE** I found a coupler loose on the charge tube (not sure how that got overlooked).....wtf! Would this cause the AFR to read rich?
Last edited by C U IN REARVEIW; May 14, 2018 at 10:33 AM.
Safety Car
Joined: Jun 2005
Posts: 4,977
Likes: 256
From: St. Louis Missouri
Thread Starter
Le Mans Master
Joined: Jan 2009
Posts: 5,656
Likes: 112
From: ocean springs mississippi
Race Director
Joined: May 2004
Posts: 16,667
Likes: 1,209
From: Raleigh, NC
St. Jude Donor '15
Wideband will "read" correctly regardless, wideband doesn't care about an air leak. That's not to say it isn't actually lean or rich, just that the wideband will still be reporting whatever it actually is
I say fix the leak and try it. If the entire VE table was perfect everywhere then I don't know that it would make any difference, but it's possible you're hitting spots in the table that the tuner didn't hit when tuning it so you're getting richer or whatever than it should be
Fix it and see what happens..
I say fix the leak and try it. If the entire VE table was perfect everywhere then I don't know that it would make any difference, but it's possible you're hitting spots in the table that the tuner didn't hit when tuning it so you're getting richer or whatever than it should be
Fix it and see what happens..
Last edited by schpenxel; May 14, 2018 at 02:11 PM.
Thread Starter
Le Mans Master
Joined: Jan 2009
Posts: 5,656
Likes: 112
From: ocean springs mississippi
Wideband will "read" correctly regardless, wideband doesn't care about an air leak. That's not to say it isn't actually lean or rich, just that the wideband will still be reporting whatever it actually is
I say fix the leak and try it. If the entire VE table was perfect everywhere then I don't know that it would make any difference, but it's possible you're hitting spots in the table that the tuner didn't hit when tuning it so you're getting richer or whatever than it should be
Fix it and see what happens..
I say fix the leak and try it. If the entire VE table was perfect everywhere then I don't know that it would make any difference, but it's possible you're hitting spots in the table that the tuner didn't hit when tuning it so you're getting richer or whatever than it should be
Fix it and see what happens..
Last edited by C U IN REARVEIW; May 14, 2018 at 04:02 PM.
Safety Car
Joined: Jun 2005
Posts: 4,977
Likes: 256
From: St. Louis Missouri
Race Director
Joined: May 2004
Posts: 16,667
Likes: 1,209
From: Raleigh, NC
St. Jude Donor '15
I understand the wideband reading what it see"s....but wasn't sure being speed density tuned if the computer is just adding "tuned" amount of fuel and can't tell if there is equal air parts to work with it...as my MAF is tuned out (im very vague on speed density tuning).
Thread Starter
Le Mans Master
Joined: Jan 2009
Posts: 5,656
Likes: 112
From: ocean springs mississippi
Yeah,I put it back together and tried it....better;but still off. If I have to re-tune it....i may as well pulley down and go with dual meth nozzles as I've been putting it off for awhile now. Im running a single M15 on (5 on controller).....would it be better to just turn this up vs. Run 2 M10"s? Going to be running a 3.4' pulley
Race Director
Joined: May 2004
Posts: 16,667
Likes: 1,209
From: Raleigh, NC
St. Jude Donor '15
I'd rather use a smaller nozzle and turn the controller way up than the other way around personally. Mine's as high as it will go but I think I'm just running an M10 nozzle now? Not sure, but def isn't more than 1 M15
Thread Starter
Le Mans Master
Joined: Jan 2009
Posts: 5,656
Likes: 112
From: ocean springs mississippi
You are running the 3.4" pulley on a T-trim as well correct?