5at N/A build, poor results, need help
#16
Please see my Dyno for my BONESTOCK G35 with a pathetic K&N filter along with Z-tube which adds .00001hp. I have a stock REVUP motor with cd009 manual tranny. I would expect you to get much higher numbers than what is posted. Sounds like a ton of money for "diamonds" in your engine and they did not seem to pay off. Also can't you play with solenoid pressure or line pressure to help keep your shifts in check (not really sure as I have a manual and she always stays in check ).
Edit: BTW that was on shitty 87 octane gas
Edit: BTW that was on shitty 87 octane gas
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North Van G (02-08-2013)
#17
From personal experience. I believe it all comes down to the tuner. Ive tuned from two places (Uprev themselves in Austin TX) and Jotech Motorsport (Dallas TX)
From the first tune, I couldnt even feel a difference besides the higher rev limiter. The car seem to bog from a low roll all the way up to the top end as well. The guy didnt do anything to my transmission or up any pressure to the line. I feel like he was a total noob. But overall the car came in with 258hp & 237tq baseline. After the tune it made 265hp & 238tq. I couldnt really feel anything and the gains were all from the high end with no gains from the bottom or mid range. I was happy wit the numbers though. Oh and this was on a DYNOJET.
Took it to Jotech Motorsport and WOW. The tuner there (Thomas Rivera) very knowledgeable guy and he tuned everything from the bottom up from my car! He messed with the transmission pressure line to give more bite and faster shifts (transgo shifts so much faster), changed the throttle response,100% opening from the throttle body, my idle, cam timing, fan temps., etc. I mean, he did everything he could and my car felt WAAAAAYYYYY different. Night and day difference like the transgo feeling. It came in and baseline at 233hp & 194tq. After the tune 267hp and 230tq!!!!!! This was all on a DYNOCOM. The gains were all throughout the power band as well.
Tuner man. All I gotta say. But dont take the numbers to the grave. As long as you can feel a difference. Then you should be fine, and in difference it shouldnt even be a little. It should be like an awakening of the car.
Mods on my 5AT G35 coupe
JWT intake with a Stillen shield
Z-tube
MD 5/16th spacer
MD ART pipes
MD TDX V2 exhaust
Transgo
Osiris
Im surprise the JWT intake lost power... Makes me want to throw my stock intake back... Anymore info on this???
From the first tune, I couldnt even feel a difference besides the higher rev limiter. The car seem to bog from a low roll all the way up to the top end as well. The guy didnt do anything to my transmission or up any pressure to the line. I feel like he was a total noob. But overall the car came in with 258hp & 237tq baseline. After the tune it made 265hp & 238tq. I couldnt really feel anything and the gains were all from the high end with no gains from the bottom or mid range. I was happy wit the numbers though. Oh and this was on a DYNOJET.
Took it to Jotech Motorsport and WOW. The tuner there (Thomas Rivera) very knowledgeable guy and he tuned everything from the bottom up from my car! He messed with the transmission pressure line to give more bite and faster shifts (transgo shifts so much faster), changed the throttle response,100% opening from the throttle body, my idle, cam timing, fan temps., etc. I mean, he did everything he could and my car felt WAAAAAYYYYY different. Night and day difference like the transgo feeling. It came in and baseline at 233hp & 194tq. After the tune 267hp and 230tq!!!!!! This was all on a DYNOCOM. The gains were all throughout the power band as well.
Tuner man. All I gotta say. But dont take the numbers to the grave. As long as you can feel a difference. Then you should be fine, and in difference it shouldnt even be a little. It should be like an awakening of the car.
Mods on my 5AT G35 coupe
JWT intake with a Stillen shield
Z-tube
MD 5/16th spacer
MD ART pipes
MD TDX V2 exhaust
Transgo
Osiris
Im surprise the JWT intake lost power... Makes me want to throw my stock intake back... Anymore info on this???
Last edited by Algy; 02-08-2013 at 12:10 AM.
#19
LOL I already read that.. Unless it suffers a dramatic amount. Id take it off, but if we are talking about 1 or 2 ponies that I WONT even feel. Ill leave it on bc the sound is so much better.
#21
Reasons why I got a JWT intake filter and Stillen shied
https://g35driver.com/forums/tuner-d...dyno-test.html
https://g35driver.com/forums/tuner-d...dyno-test.html
#22
I just got the dyno resultson the n/a build for my '07 5at coupe, including:
-JWT S1 cams
-DLC valve lifters
-Momentum headers
-Art pipes
-HKS Hiflow exhaust
-trnsgo valvebody
-3.5 vlsd
-TB spacer
The solid line is the new (yes, tuned) run, broken line is from the Summer when I just had a z-tube, art pipes, 5/16th and an Osirus reflash. The gains seem unusually poor for cams and valvelifters, especially considering the engine lost some top end where I was expecting to gain the most. If anybody has some advice/feedback or has faced a similar problem please let me know (other than to say I should have just bought a supercharger.. thanks captain hindsight)!
One thing the tuner said was that you cant take away the 5at throttle cut at high rpm when it wants to get ready to shift.. even in manual mode. That seems like part of the problem, but there must be a way around that otherwise nobody with an AT would be tuning.. maybe its an '07 specific issue.
-JWT S1 cams
-DLC valve lifters
-Momentum headers
-Art pipes
-HKS Hiflow exhaust
-trnsgo valvebody
-3.5 vlsd
-TB spacer
The solid line is the new (yes, tuned) run, broken line is from the Summer when I just had a z-tube, art pipes, 5/16th and an Osirus reflash. The gains seem unusually poor for cams and valvelifters, especially considering the engine lost some top end where I was expecting to gain the most. If anybody has some advice/feedback or has faced a similar problem please let me know (other than to say I should have just bought a supercharger.. thanks captain hindsight)!
One thing the tuner said was that you cant take away the 5at throttle cut at high rpm when it wants to get ready to shift.. even in manual mode. That seems like part of the problem, but there must be a way around that otherwise nobody with an AT would be tuning.. maybe its an '07 specific issue.
I know this isn't totally relevant but worth a look.
http://www.modified.com/tech/modp-10...m/viewall.html
Last edited by Peoria35sedan; 02-08-2013 at 11:36 AM.
#23
What was the pre and post tune comparison? comparing it with an older tune might not be as accurate. A pre/post tune result will show you better evidence of the tuning gains or lack thereof. Even with a dyno reading really low..gains are gains. Most of the "it drives so much better" are probably mind over matter of getting new mods installed and a presumed 'tune'
#24
^^ It's in the first post, gained about 1 hp overall, shows good gains around 3500.
OP, when I had my car dyno'd it never attempted to upshift, it down shifted but not up, if you are in MM does your car shift by it's self before it hits the limiter? If not why would the throttle cut if the cars not going to shift? Sounds fishy.
OP, when I had my car dyno'd it never attempted to upshift, it down shifted but not up, if you are in MM does your car shift by it's self before it hits the limiter? If not why would the throttle cut if the cars not going to shift? Sounds fishy.
#25
#26
I am going to talk to my tuner this weekend to see if they have come up with any ideas. More importantly I will ask them exactly what changes they have made in the up-rev software and what they left alone (ie torque management, line pressure, cam timing, what am I missing?)
#28
I know this isn't totally relevant but worth a look.
http://www.modified.com/tech/modp-10...m/viewall.html
http://www.modified.com/tech/modp-10...m/viewall.html
To answer your question Redstar, I did ask about the fuel pump and my tunersaid it should be fine for these mods. I'll add it to the troubleshooting list though
I will also be hitting up the mopac dyno next week, where I have a stock baseline run and an untuned run with art pipes and plenum spacer.
Last edited by North Van G; 02-08-2013 at 10:55 PM.
#29
One thing the tuner said was that you cant take away the 5at throttle cut at high rpm when it wants to get ready to shift.. even in manual mode. That seems like part of the problem, but there must be a way around that otherwise nobody with an AT would be tuning.. maybe its an '07 specific issue.
To your problem about the throttle cut, ask the your tuner to raise your revs to what ever desired rev you want. After that, ask the tuner to set the throttle cut to about 3-400 rpms higher to whatever your rev limit is. That should solve your problem bc it did mine. I had my rev limit to 7000 and the throttle cut at 7300 which I wont even come close to and the throttle cut wont ever initiate.
Another thing I notice too after he retuned it was my throttle response sucked and it was sooooo laggy. To fix that he took away the ETC (Electronic Throttle Control) which is for the cruise control and depending what year and model you have (06-07) helps with rev matching when you downshift. My tuner turned that off for me and I cant use my cruise control but damn my throttle response is night a day difference after turning the ETC off. The car responds and explodes to whatever I do to the pedal. Also when downshifting, I have to blip my own throttle so it doesnt jerk hard from the lower gear.
The following users liked this post:
North Van G (02-11-2013)