Need advice
Thread Starter
Intermediate
Joined: Apr 2011
Posts: 48
Likes: 0
From: Ewa Beach Hawaii
Need advice
I have a 2007 C6 that I've added an A&A T-trim kit to. Because we don't have too many experienced (LS) tuners on island, I went with a tuner that was recommended on the mainland and sent datalogs/tunes back and forth. I've run into a problem with the MAF maxing out at 5400 rpm. I put the car on the dyno today and she pulled a mere 446/416 (5400-6500rpm)on 92 Octane and 7lbs. The lines are nearly straight until it hits the 5400 area, then she flatlines and breaks up.
Is it normal for the MAF to max out so early on such a moderate amount of boost? Do people usually change the MAF to a card style like the LS3/LS7 or do the just go speed density? I'd really like to keep the car tuned with the MAF.
Thanks,
Ryan
Is it normal for the MAF to max out so early on such a moderate amount of boost? Do people usually change the MAF to a card style like the LS3/LS7 or do the just go speed density? I'd really like to keep the car tuned with the MAF.
Thanks,
Ryan
Safety Car
Joined: May 2006
Posts: 4,016
Likes: 93
From: St. Louis, MO
Tech Contributor
Something doesn't sound right. The MAF shouldn't be running out at that power level. Are you using HP Tuners? Do you have a wideband you can install into the exhaust and connect to the interface?
Thread Starter
Intermediate
Joined: Apr 2011
Posts: 48
Likes: 0
From: Ewa Beach Hawaii
I am using HP tuners. I didn't have the Wideband hooked up for the dyno, but if I remeber right from the last datalog (after the tune was finished), the car goes from 11.6 to 9.99 or so at 5400ish. I don't have the laptop with me, but I can get it later tonight.
I am flying out to Phoenix on Thursday and won't be back before the last week of the month. Was planning to talk with some of the shops there.
Can anyone tell me the difference between a loaded and unloaded Dynojet? I was told the shop had a loaded Dynojet, but when I asked the guy running it if he could make one pull without a load, he said it wasn't loaded and explained that it was standard SAE readings. It might make some sense if the dyno were a loaded one and gave "real world" power that you would see day to day on the street, but not if it were a standard pull.
Thanks for the help.
Ryan
Edit: the WB was reading low 11 high 10s, then progressed to low 10s before the MAF maxed out.
I am flying out to Phoenix on Thursday and won't be back before the last week of the month. Was planning to talk with some of the shops there.
Can anyone tell me the difference between a loaded and unloaded Dynojet? I was told the shop had a loaded Dynojet, but when I asked the guy running it if he could make one pull without a load, he said it wasn't loaded and explained that it was standard SAE readings. It might make some sense if the dyno were a loaded one and gave "real world" power that you would see day to day on the street, but not if it were a standard pull.
Thanks for the help.
Ryan
Edit: the WB was reading low 11 high 10s, then progressed to low 10s before the MAF maxed out.
Last edited by Ryan07; Jul 6, 2011 at 09:39 PM. Reason: info update
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
Intermediate
Joined: Apr 2011
Posts: 48
Likes: 0
From: Ewa Beach Hawaii
Since I was unable to upload here. I've uploaded files to HPtuners site http://www.hptuners.com/forum/showth...687#post261687 .
Thanks for the help.
Ryan
Thanks for the help.
Ryan
Instructor
Joined: Dec 2005
Posts: 188
Likes: 5
From: Was Los Angeles, now Phoenix, Arizona
Try photobucket as a host site
http://forums.corvetteforum.com/help...al-inside.html
For photos only
http://forums.corvetteforum.com/help...al-inside.html
For photos only