UpRev ECU tune results for Semtex's Z

chuckd05 · 11-02-2009, 03:11 PM

how long would you have to warm your car up to avoid the cold start issue you are having ?

semtex · 11-02-2009, 03:15 PM

^ Not sure. I haven't tried -- I don't have the patience. I'd guess around 3 mins. of just sitting there with the ending idling.

B1nks · 11-02-2009, 03:25 PM

if you wait even around 30 seconds or so and start to drive the really bad lurch won't happen. What I have noticed happening is, you get it into first and start driving and lets say you give it 30% throttle and hold it there. The revs will be lag, maybe something comparable to the feeling of turbo lag, and then without adjusting the throttle input the rpms will rise at the normal rate of speed. Now to a passenger it may just seem like you've just opened the throttle some but really it hasn't moved. Really something like turbo lag, as if you mashed the throttle down low and it just lags until the turbo kicks in and then kicks off. It will stop after 1-2 mins of driving though. These times also probably vary depending on how cold it is outside also.

semtex · 11-02-2009, 05:07 PM

Hmm...I always wait at least 30 seconds before I start driving and still have this lurch. I guess maybe it's not as bad as it'd be if I didn't wait before going, huh?

B1nks · 11-02-2009, 06:36 PM

yeah, probably..was hoping UpRev would have shown up with a post at least saying that they have been informed and will be looking into it or something..

jpit · 11-02-2009, 07:17 PM

They're probably on their way to SEMA.

Zsteve · 11-02-2009, 07:39 PM

is this happening on the 7ATs too? Or has no AT been tuned yet?

semtex · 11-02-2009, 09:05 PM

Quote:

Originally Posted by Zsteve

is this happening on the 7ATs too? Or has no AT been tuned yet?

Two pages back:

Quote:

Originally Posted by caneman88

After the tune on Wednesday at UpRev I noticed the same thing I have the AT but you push the throttle and it almost seems like your in neutral the the gear grabs and it takes off. Also the Vallet mode did not work they said they would work on a fix for it Theft mode did not seem to work either.

caneman88 · 11-02-2009, 10:30 PM

Rich did say last week he was going to SEMA he was staying at the Stratosphere I think that is the name Maybe we can call him there

I am going to take the Texas Titan to Uprev on Wed to get tuned.I will get some info then. There it is in the background

B1nks · 11-02-2009, 10:51 PM

Oh yeah, he is at SEMA but Jared and the rest should be there and that's who matters in this instance. I'll call tomorrow to find something out..not sure they even get on here since Rich does most of the marketing side of things.

DIGItonium · 11-03-2009, 12:56 AM

So are we seeing the opposite trend of trying to reduce the throttle lag and improve response? :-(

semtex · 11-03-2009, 08:32 AM

Quote:

Originally Posted by DIGItonium

So are we seeing the opposite trend of trying to reduce the throttle lag and improve response? :-(

Only at cold start for the first couple of mins. After that, it's all good. I've actually started to get used to the behavior and, this morning, was able to change the way I modulate the clutch enough to actually get off the line semi-smoothly. I wouldn't switch back to my stock ROM right now even if I could. The benefits of the tune outweigh this minor bug. Of course, that's just my opinion as it relates to my specific car. Others may feel differently. And for 7AT models, there's no way to change the way you modulate the clutch, so there's no workaround if you have a 7AT (point being, this still needs to be fixed).

NIZMOZ · 11-03-2009, 08:52 AM

Quote:

Originally Posted by B1nks

Oh yeah, he is at SEMA but Jared and the rest should be there and that's who matters in this instance. I'll call tomorrow to find something out..not sure they even get on here since Rich does most of the marketing side of things.

Rich would be the one going to Sema if anyone went. Jared would stay at the shop with the other guys doing the tunes as he knows the software in and out while Rich is just the sales person.

Sharif@Forged · 11-03-2009, 09:55 AM

Knowing how uprev works, they should have a fix really really quickly. And the issue is only on cold start for a few seconds. After that, it seems normal.

semtex · 11-03-2009, 09:58 AM

Quote:

Originally Posted by Sharif@Forged

Knowing how uprev works, they should have a fix really really quickly. And the issue is only on cold start for a few seconds. After that, it seems normal.

Sharif, have you talked to them to confirm they're aware of the issue?

11-02-2009, 03:11 PM	#91 (permalink)
chuckd05 A True Z Fanatic Join Date: Oct 2009 Location: NY Posts: 2,391 Drives: No longer a Z Rep Power: 20	how long would you have to warm your car up to avoid the cold start issue you are having ? __________________ 09 370Z 6M PW - FBO Best 1/4 mile = 12.926 @ 109 SOLD -- 08 BMW 135i - FBO 12.1@120mph SOLD -- white 09 e92 335 Coupe Mtech - 11.9 @ 119 :-)

11-02-2009, 03:15 PM	#92 (permalink)
semtex A True Z Fanatic Join Date: Jan 2009 Location: Behind enemy lines Age: 54 Posts: 5,995 Drives: People to drink Rep Power: 32	^ Not sure. I haven't tried -- I don't have the patience. I'd guess around 3 mins. of just sitting there with the ending idling. __________________ "There are no small accidents on this circuit." -- Ayrton Senna 316.8whp & 248 ft/lbs (Dyno Dynamics) \| 319whp & 256 ft/lbs (DynoJet) (04/23/10) Stillen G3 CAI, CBE, Pulley / F.I. LTH / GTSpec Ladder Brace / Setrab Oil Cooler / UpRev-tuned by Forged Perf.

11-02-2009, 05:07 PM	#94 (permalink)
semtex A True Z Fanatic Join Date: Jan 2009 Location: Behind enemy lines Age: 54 Posts: 5,995 Drives: People to drink Rep Power: 32	Hmm...I always wait at least 30 seconds before I start driving and still have this lurch. I guess maybe it's not as bad as it'd be if I didn't wait before going, huh? __________________ "There are no small accidents on this circuit." -- Ayrton Senna 316.8whp & 248 ft/lbs (Dyno Dynamics) \| 319whp & 256 ft/lbs (DynoJet) (04/23/10) Stillen G3 CAI, CBE, Pulley / F.I. LTH / GTSpec Ladder Brace / Setrab Oil Cooler / UpRev-tuned by Forged Perf.

11-02-2009, 07:39 PM	#97 (permalink)
Zsteve A True Z Fanatic Join Date: Sep 2009 Location: TX Posts: 3,298 Drives: the 2 balled club Rep Power: 22	is this happening on the 7ATs too? Or has no AT been tuned yet? __________________ 2010 LS3 C6 Silver coupe corvette

11-03-2009, 12:56 AM	#101 (permalink)
DIGItonium A True Z Fanatic Join Date: Jan 2009 Location: Kansas Posts: 3,800 Drives: 09 Z34-TT 6MT Rep Power: 42	So are we seeing the opposite trend of trying to reduce the throttle lag and improve response? :-( __________________

11-02-2009, 03:25 PM	#93 (permalink)
B1nks Track Member Join Date: Apr 2009 Location: Houston,Tx Posts: 721 Drives: 2009 370Z Base 6MT Rep Power: 507	if you wait even around 30 seconds or so and start to drive the really bad lurch won't happen. What I have noticed happening is, you get it into first and start driving and lets say you give it 30% throttle and hold it there. The revs will be lag, maybe something comparable to the feeling of turbo lag, and then without adjusting the throttle input the rpms will rise at the normal rate of speed. Now to a passenger it may just seem like you've just opened the throttle some but really it hasn't moved. Really something like turbo lag, as if you mashed the throttle down low and it just lags until the turbo kicks in and then kicks off. It will stop after 1-2 mins of driving though. These times also probably vary depending on how cold it is outside also.

11-02-2009, 06:36 PM	#95 (permalink)
B1nks Track Member Join Date: Apr 2009 Location: Houston,Tx Posts: 721 Drives: 2009 370Z Base 6MT Rep Power: 507	yeah, probably..was hoping UpRev would have shown up with a post at least saying that they have been informed and will be looking into it or something..

11-02-2009, 07:17 PM	#96 (permalink)
jpit Enthusiast Member Join Date: Feb 2009 Location: Washington State Posts: 440 Drives: 370Z Tour MT w/Spt Rep Power: 16	They're probably on their way to SEMA.

11-02-2009, 10:51 PM	#100 (permalink)
B1nks Track Member Join Date: Apr 2009 Location: Houston,Tx Posts: 721 Drives: 2009 370Z Base 6MT Rep Power: 507	Oh yeah, he is at SEMA but Jared and the rest should be there and that's who matters in this instance. I'll call tomorrow to find something out..not sure they even get on here since Rich does most of the marketing side of things.

11-03-2009, 09:55 AM	#104 (permalink)
Sharif@Forged The370Z.com Sponsor Join Date: Dec 2008 Location: Marietta, GA Posts: 840 Drives: 2009 GT-R, 2010 370Z Rep Power: 18	Knowing how uprev works, they should have a fix really really quickly. And the issue is only on cold start for a few seconds. After that, it seems normal. __________________ Sharif@Forgedperformance.com General Manager/Certified Tuner/NASA-PCA-BMWCAA Instructor JRZ RS1's Available NOW...PM me Cobb ProTuner, Uprev ECU Flash, FCON Vpro, Haltech, Motec Certified

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