how safe is WOT without wideband?
how safe is WOT without wideband? Ive searched,no straight answer.
Ok guys,I sent my PCM for mail order tune after doing these mods
799 heads
228r cam
Ls6 intake
Ls6 injectors.
I was told that I have to be careful,and that I can't go WOT without wideband,since I can lean my engine out.I'm working on getting a wideband,but that will be sometime next week.now my question
How safe is WOT without a wideband? What are the chances of me leaning out the engine? I can cruise my car right? any other pointers?
Thanks
Ok guys,I sent my PCM for mail order tune after doing these mods
799 heads
228r cam
Ls6 intake
Ls6 injectors.
I was told that I have to be careful,and that I can't go WOT without wideband,since I can lean my engine out.I'm working on getting a wideband,but that will be sometime next week.now my question
How safe is WOT without a wideband? What are the chances of me leaning out the engine? I can cruise my car right? any other pointers?
Thanks
I assume the tuner told you this?
I wouldn't even come close if so. They should know better than anybody how lean that car can run.
Go get it dyno'd. About $50 and they'll tell you how lean you are/aren't.
I wouldn't even come close if so. They should know better than anybody how lean that car can run.
Go get it dyno'd. About $50 and they'll tell you how lean you are/aren't.
Launching!
Joined: Feb 2004
Posts: 260
Likes: 0
Ive searched,no straight answer.
Ok guys,I sent my PCM for mail order tune after doing these mods
799 heads
228r cam
Ls6 intake
Ls6 injectors.
I was told that I have to be careful,and that I can't go WOT without wideband,since I can lean my engine out.I'm working on getting a wideband,but that will be sometime next week.now my question
How safe is WOT without a wideband? What are the chances of me leaning out the engine? I can cruise my car right? any other pointers? Thanks
Ok guys,I sent my PCM for mail order tune after doing these mods
799 heads
228r cam
Ls6 intake
Ls6 injectors.
I was told that I have to be careful,and that I can't go WOT without wideband,since I can lean my engine out.I'm working on getting a wideband,but that will be sometime next week.now my question
How safe is WOT without a wideband? What are the chances of me leaning out the engine? I can cruise my car right? any other pointers? Thanks
LS6 injectors max out with a 210 cam, let alone a 228.
You need the 36lb injectors and probably a 255L/hr fuel pump.
Once you know your fuel system can deliver and the PCM tune is professionally done you then won't have any doubts.
It's not got much to do with whether you need a WBo2; It's about getting the right combination of parts that are proven to work.
LS6 injectors max out with a 210 cam, let alone a 228.
You need the 36lb injectors and probably a 255L/hr fuel pump.
Once you know your fuel system can deliver and the PCM tune is professionally done you then won't have any doubts.
LS6 injectors max out with a 210 cam, let alone a 228.
You need the 36lb injectors and probably a 255L/hr fuel pump.
Once you know your fuel system can deliver and the PCM tune is professionally done you then won't have any doubts.
If the fuel pressure is solid and the MAF is known to be good, you should be good if the mail order tune is, you just can't know for 100% until you see it with a wideband. See if you can borrow a friends or something. If you are peaking in at NBO2 voltage at WOT it will let you verify that you are in the ballpark.
I use the disclaimer on my own calibrations after seeing the sea of bad MAFs, intake leaks, etc that often get pointed back at the calibration after users seem to be unable to properly troubleshoot their setups when there are issues.
The cars are fine to cruise on; normal closed loop operation can mask problems such as a bad MAF through heavy fuel trimming.
Launching!
Joined: Feb 2004
Posts: 260
Likes: 0
Hello Steve,
Fitting just a small 212-218 cam on an otherwise stock 5.7 shows IDC of over 80% (using EFI-L scanner) above 5,500rpm when retaining the 28.5lb LS6 injectors. A change to 36lb-ers fixed it.
These were on cars making less than 400rwhp (eddie-current dyno).
The stock 194L/hr fuel pump also failed to deliver enough fuel for a cammed LS7 (505rwhp e/c dyno) during sustained high-speed running (130mph+) the engine burnt a number of valves and damaged a few pistons too.
A short WOT pull on a dyno may not show this problem.
Only passing on actual events that were experienced.
Fitting just a small 212-218 cam on an otherwise stock 5.7 shows IDC of over 80% (using EFI-L scanner) above 5,500rpm when retaining the 28.5lb LS6 injectors. A change to 36lb-ers fixed it.
These were on cars making less than 400rwhp (eddie-current dyno).
The stock 194L/hr fuel pump also failed to deliver enough fuel for a cammed LS7 (505rwhp e/c dyno) during sustained high-speed running (130mph+) the engine burnt a number of valves and damaged a few pistons too.
A short WOT pull on a dyno may not show this problem.
Only passing on actual events that were experienced.
Hello Steve,
Fitting just a small 212-218 cam on an otherwise stock 5.7 shows IDC of over 80% (using EFI-L scanner) above 5,500rpm when retaining the 28.5lb LS6 injectors. A change to 36lb-ers fixed it.
These were on cars making less than 400rwhp (eddie-current dyno).
Only passing on actual events that were experienced.
Fitting just a small 212-218 cam on an otherwise stock 5.7 shows IDC of over 80% (using EFI-L scanner) above 5,500rpm when retaining the 28.5lb LS6 injectors. A change to 36lb-ers fixed it.
These were on cars making less than 400rwhp (eddie-current dyno).
Only passing on actual events that were experienced.
This is w/ dyno dynamics machine.
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Launching!
Joined: Feb 2004
Posts: 260
Likes: 0
GM themselves,
fitted 36lb injectors in the 430ehp Corvette ASA cars....
http://www.corvettefever.com/techart...sa_engine.html
Why not go with what these people below recommend, they seem to know what they are talking about:
http://www.rceng.com/technical.aspx
fitted 36lb injectors in the 430ehp Corvette ASA cars....
http://www.corvettefever.com/techart...sa_engine.html
Why not go with what these people below recommend, they seem to know what they are talking about:
http://www.rceng.com/technical.aspx
Last edited by Sid447; Feb 23, 2011 at 06:46 AM.
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