Dyno pic's inside: what is wrong?!
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So i called PTC about the possibility of the converter being the issue.
He said considering where the slipping or load up seems to be taking place, and that it only seems to happen in top of third, he leans toward the 3rd gear clutch in the trans being the problem? He said if it was the converter it would be happening all the time.
I have a local guy that has been aching to have a shot at the build on my trans.
Vinny-I guess you are saying that it is the trans giving out on the 150 shot? I guess it is fully possible that the trans is crapping out on the nitrous and not on motor.
I will call the trans guy this afternoon. I guess it's time for a RMVB T-brake
He said considering where the slipping or load up seems to be taking place, and that it only seems to happen in top of third, he leans toward the 3rd gear clutch in the trans being the problem? He said if it was the converter it would be happening all the time.
I have a local guy that has been aching to have a shot at the build on my trans.
Vinny-I guess you are saying that it is the trans giving out on the 150 shot? I guess it is fully possible that the trans is crapping out on the nitrous and not on motor.
I will call the trans guy this afternoon. I guess it's time for a RMVB T-brake
yup.
Did you ask him for the 'effective gear ratio' graph or 'rpm vs speed' graph on your last runs?
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Robert,
I am glad to see you jump in on this thread! Actually, I am positive we had the 150 jets(per Nitro-daves plate sheet) in the plate. I ran it on the 100 jets, and it had the same problem at the track the previous week, which is why we headed to the dyno. On the 100jets, it picked up 2 mph through the 1/4.
Actually, that pic above of the nitrous hit, we even tried backing down one jet on the fuel side to try and lean out the hit a little. So, it was actually even richer than that with the correct fuel jet in there.
I read up on others problems(like yourself) and took off the entire line, as well as the solenoid to check for any debri/kinks in the line/etc. I found nothing unfortunately. I rarely post as the one asking for help, so i guess it's my turn to get schooled! I am just completely stuck on this one.
I am glad to see you jump in on this thread! Actually, I am positive we had the 150 jets(per Nitro-daves plate sheet) in the plate. I ran it on the 100 jets, and it had the same problem at the track the previous week, which is why we headed to the dyno. On the 100jets, it picked up 2 mph through the 1/4.
Actually, that pic above of the nitrous hit, we even tried backing down one jet on the fuel side to try and lean out the hit a little. So, it was actually even richer than that with the correct fuel jet in there.
I read up on others problems(like yourself) and took off the entire line, as well as the solenoid to check for any debri/kinks in the line/etc. I found nothing unfortunately. I rarely post as the one asking for help, so i guess it's my turn to get schooled! I am just completely stuck on this one.
Robert
So i called PTC about the possibility of the converter being the issue.
He said considering where the slipping or load up seems to be taking place, and that it only seems to happen in top of third, he leans toward the 3rd gear clutch in the trans being the problem? He said if it was the converter it would be happening all the time.
I have a local guy that has been aching to have a shot at the build on my trans.
Vinny-I guess you are saying that it is the trans giving out on the 150 shot? I guess it is fully possible that the trans is crapping out on the nitrous and not on motor.
I will call the trans guy this afternoon. I guess it's time for a RMVB T-brake
He said considering where the slipping or load up seems to be taking place, and that it only seems to happen in top of third, he leans toward the 3rd gear clutch in the trans being the problem? He said if it was the converter it would be happening all the time.
I have a local guy that has been aching to have a shot at the build on my trans.
Vinny-I guess you are saying that it is the trans giving out on the 150 shot? I guess it is fully possible that the trans is crapping out on the nitrous and not on motor.
I will call the trans guy this afternoon. I guess it's time for a RMVB T-brake
as for the jetting issue. If the motor does not have load on it the fuel jets will need to be lower. more load = more fuel. and changing 1 fuel jet size will only change it .3 or so at best but if its still not loaded it will need more.
JMHO
JMHO
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Every one of us whom run nitrous have had similar problems, and the ensuing diagnostics process, hell I still ask questions all the time. I think Vinny may be on the right track, once it starts slipping it remains slipping and thus no more increase of the torque numbers, it just can't hold it. So, getting the info he asked for would likely pin point the issue and confirm, or tell us to look else where.
Robert
Robert
Thanks for the info!
WE need a 2nd and 3rd gear log of rpm vs mph. this will show us if its slippin in just 3rd or not if it slips in 2 gears its the convertor. i had an ati convertor that did the same thing changed it out and it went .5 faster first time out.
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I will get a log on the car as soon as possible(I'm thinking the dyno sheet will give us the best view). I will post it up when i get it from the dyno operator.
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Some notes on the car at the track with this problem:
-The car picked up 5mph in the 1/8, but only 2mph in the 1/4 @ 100jets
-The car picked up 6tenths in the 1/8, but 4.5tenths in the 1/4 @ 100jets
To me, it looks about "on par" with the 1/8 mile, but is just awful in the 1/4
wow, that's completly crazy. looks like somone let a kid loose on your dynograph with a coloring pencil.
hope you fix the problem, id like to see what it was....im learning something from this thread!
hope you fix the problem, id like to see what it was....im learning something from this thread!
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Ok Guys,
Big update: Here are the dyno views i think you were asking for. The dyno operator also sent me all the .drf files, so if you have that software, I would be happy to forward them to you to view! I also verified timing was at 22* for these pulls. Also, the DRF files are attached to this post.
Please take a look:
Big update: Here are the dyno views i think you were asking for. The dyno operator also sent me all the .drf files, so if you have that software, I would be happy to forward them to you to view! I also verified timing was at 22* for these pulls. Also, the DRF files are attached to this post.
Please take a look:
Last edited by tim99ws6; Sep 2, 2008 at 01:54 PM.
The 2nd one is a typical converter flash.. my car does that.
I dunno, seems like there's some kind of slippage going on... I'd start by draining the fluid, see what it looks like. If it's black/burnt, the problem is found tranny is shot.
I dunno, seems like there's some kind of slippage going on... I'd start by draining the fluid, see what it looks like. If it's black/burnt, the problem is found tranny is shot.