Tuning Question
10-11-2017, 08:05 AM
#21
Melting Slicks
Thread Starter
Using such low MPH there's no way that either the driven gear or an ERA (The Abbott) will likely help. An Abbott is a little pricey but I've done a couple but not recently, many years ago. Now with the gears and VSS becoming very hard to find or very expensive if you can find them the ERA is going to be the only option.
Dakota Digital SGI ERAs are less expensive I believe and easier to put hands on. Abbott was always about commercial equipment operation.
Here's a link to DD
http://www.dakotadigital.com/index.c...rod/prd126.htm
Dakota Digital SGI ERAs are less expensive I believe and easier to put hands on. Abbott was always about commercial equipment operation.
Here's a link to DD
http://www.dakotadigital.com/index.c...rod/prd126.htm
Then I guess I am back with either new cats or water injection.
10-11-2017, 08:17 AM
#22
How many times can you go through the check for the same original fee? The 40 tooth gear is cheap and easy so you maybe buy and try to see what happens. I don't believe I'd pay the fee again for a check but maybe! A conversation with Marc for sure before buying a thing.
Even prepping for a retest is likely very costly. What do you/did you actually do before the original test?
Even prepping for a retest is likely very costly. What do you/did you actually do before the original test?
Last edited by WVZR-1; 10-11-2017 at 08:19 AM.
10-11-2017, 08:37 AM
#23
Melting Slicks
Thread Starter
How many times can you go through the check for the same original fee? The 40 tooth gear is cheap and easy so you maybe buy and try to see what happens. I don't believe I'd pay the fee again for a check but maybe! A conversation with Marc for sure before buying a thing.
Even prepping for a retest is likely very costly. What do you/did you actually do before the original test?
Even prepping for a retest is likely very costly. What do you/did you actually do before the original test?
10-11-2017, 11:32 AM
#24
Race Director
Member Since: Oct 2001
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One of the things you can do (or the tester can do) is use a higher gear to achieve the required speed. I was usually on the hairy edge of passing but if he used 3rd gear, he could get the RPM up just high enough and stay below the max speed. Just enough to get it to pass. I always tipped him well too 
You could try running spark plugs a couple of ranges cooler than stock.
Are you running the 10% ethanol blend fuel? Run a tank of 100% gas through and test on that. High Nox comes from high combustion temps, which could be from a lean condition.
At least you won't have to play this stupid game much longer...
You could try running spark plugs a couple of ranges cooler than stock.
Are you running the 10% ethanol blend fuel? Run a tank of 100% gas through and test on that. High Nox comes from high combustion temps, which could be from a lean condition.
At least you won't have to play this stupid game much longer...
10-11-2017, 08:20 PM
#25
Melting Slicks
Thread Starter
One of the things you can do (or the tester can do) is use a higher gear to achieve the required speed. I was usually on the hairy edge of passing but if he used 3rd gear, he could get the RPM up just high enough and stay below the max speed. Just enough to get it to pass. I always tipped him well too
You could try running spark plugs a couple of ranges cooler than stock.
Are you running the 10% ethanol blend fuel? Run a tank of 100% gas through and test on that. High Nox comes from high combustion temps, which could be from a lean condition.
At least you won't have to play this stupid game much longer...
You could try running spark plugs a couple of ranges cooler than stock.
Are you running the 10% ethanol blend fuel? Run a tank of 100% gas through and test on that. High Nox comes from high combustion temps, which could be from a lean condition.
At least you won't have to play this stupid game much longer...
10-11-2017, 08:44 PM
#26
Le Mans Master
I had modded an 84 Xfire years ago and it was always on the edge on the edge of passing emissions on the dyno w sniffer. The guy that would drive it, really didn't know how to drive a manual trans and would end up lugging the motor. Needless to say HC would spike.
They would drive the car in a manner no one else would.
They would drive the car in a manner no one else would.