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UTEC, my experience

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Old Oct 31, 2006 | 01:23 PM
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Default UTEC, my experience

I see all these post about UTEC this and that....but man after having one myself I don't think they are really all that great.


1 Yes you can tell when the UTEC comes on and off with you have forced induction. I don't care what anyone says but you can tell.

2 Under WOT everything seems cool, but under partial throttle/partial boost you get this strange shuttering feeling as if the UTEC does not know what to do.

3 And the the NA guys I don't think it's all that great considering that it cost around $900 and then plan on spending 500-$650 on a tune just to get 13-14rwhp gain.

4 Software updates...most of the problems that i have seen stem from updated the software and then things get changed a little form the origional tune when seems to mess things up.


After I got my UTEC things (the engine) seemed to not be running smooth as id did with the factory ECU


I just wanted to shar some feedback with you gusy because I know many of you are looking at the UTEC and wanting more power. But overall I think it's so much better to just save a little more, ok allot more, and just get the HKS V-PRO. I know I wish I would have
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Old Oct 31, 2006 | 01:40 PM
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Originally Posted by trefling
I see all these post about UTEC this and that....but man after having one myself I don't think they are really all that great.


1 Yes you can tell when the UTEC comes on and off with you have forced induction. I don't care what anyone says but you can tell.
Its called full boost ..... a flat timing tune, and its as good as it gets at that price range (with out considering the fcon pro and its 3k price, not jstu a lil more)

2 Under WOT everything seems cool, but under partial throttle/partial boost you get this strange shuttering feeling as if the UTEC does not know what to do.
what is your set up..soudns liek somethign else is going on there....

3 And the the NA guys I don't think it's all that great considering that it cost around $900 and then plan on spending 500-$650 on a tune just to get 13-14rwhp gain.
there isn't a hell of a lot you can do n/a anyways... but if you get all the n/a boltons an ecu + tune will maximize all your mods, and if you still jstu wanna be NA cams, anad still an ecu needed and the utec is excellent option.

4 Software updates...most of the problems that i have seen stem from updated the software and then things get changed a little form the origional tune when seems to mess things up.
if you already got a good tune why woudl you wanna update? in same cases its not necesary

After I got my UTEC things (the engine) seemed to not be running smooth as id did with the factory ECU
cuase obvioulsy its not a factory ecu, but then again, its all in the tune

I just wanted to shar some feedback with you gusy because I know many of you are looking at the UTEC and wanting more power. But overall I think it's so much better to just save a little more, ok allot more, and just get the HKS V-PRO. I know I wish I would have
WIth a good tune thre is nothing wrong with the utec, or splitsecond, unichip, or EMU. THe utec is still better. and its not jsut a lil more on the V-PRO

comments above
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Old Oct 31, 2006 | 02:37 PM
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Mine shudders some also if i am boosting in 6th.
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Old Oct 31, 2006 | 03:01 PM
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Originally Posted by trefling
I see all these post about UTEC this and that....but man after having one myself I don't think they are really all that great.


1 Yes you can tell when the UTEC comes on and off with you have forced induction. I don't care what anyone says but you can tell.

I dont have this issue at all, there is no cross-over feeling, the only thing I feel come on is boost.

2 Under WOT everything seems cool, but under partial throttle/partial boost you get this strange shuttering feeling as if the UTEC does not know what to do.

I dont have this issue either, car runs smooth at all throttle points

3 And the the NA guys I don't think it's all that great considering that it cost around $900 and then plan on spending 500-$650 on a tune just to get 13-14rwhp gain.

I agree with this statement

4 Software updates...most of the problems that i have seen stem from updated the software and then things get changed a little form the origional tune when seems to mess things up.

I never needed to update software at all, purchased mine from Sharif and got it tuned with the existing software, I know it doesn't have the 2.6 code


After I got my UTEC things (the engine) seemed to not be running smooth as id did with the factory ECU

Engine runs fine w/ the UTEC, the only discrepency I have is startup, the car's rpm will dip somewhat low (~500rpm) after intially starting and then it'll jump right back to 750rpm's. I havent drilled a hole in the throttle plate or anything like that yet either.


I just wanted to shar some feedback with you gusy because I know many of you are looking at the UTEC and wanting more power. But overall I think it's so much better to just save a little more, ok allot more, and just get the HKS V-PRO. I know I wish I would have

I agree it's great to share some feedback w/ fellow Z'ers looking to pick one up. It sounds like you have some issues with your UTEC that need to be addressed to really give it a good review. I think the VPRO is a wicked *** system, but the closed system provides no options for me living in Colorado and the cost alone of shipping my car to IL, TX, CA for tuning is rather prohibitive. I need somebody that can tune at altitude and not provide my car with a guesstimate tune to only ended up running to rich when I'd drive it back to altitude. In my area, a ton of people run UTEC's cause of the AWD popularity in this state so it's easy to take my car to a expert UTEC tuner. TC Performance has my UTEC running super smooth. Overall it's just a matter of what makes the best sense in your situation/area. I've had a great experience with the UTEC system and I'm running the car at around 9psi on the base fuel system (no return fuel system, just a walbor 255) & stock exhaust w/ test pipes, and the car runs like a bat out of hell. The UTEC has consistently delivered the goods for my setup. I'd highly recommend it.
My comments in quote.
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Old Oct 31, 2006 | 03:13 PM
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Great Thread!

Originally Posted by trefling
1 Yes you can tell when the UTEC comes on and off with you have forced induction. I don't care what anyone says but you can tell.
I agree... if i boost to only 2 or 3 PSI.. i can feel the car lurch forward when i get off the gas... it doesn't do this when i go higher than 5 PSI and it never did it with my E-Manage.. i know its the UTEC because thats when its suppose to take over from the factory ECU


Originally Posted by trefling
2 Under WOT everything seems cool, but under partial throttle/partial boost you get this strange shuttering feeling as if the UTEC does not know what to do.
I get that some days when its hot out... like its shuttering to get to full boost

Originally Posted by trefling
3 And the the NA guys I don't think it's all that great considering that it cost around $900 and then plan on spending 500-$650 on a tune just to get 13-14rwhp gain.
no comment.. N/A sucks

Originally Posted by trefling
4 Software updates...most of the problems that i have seen stem from updated the software and then things get changed a little form the origional tune when seems to mess things up.

well i see everyone having problems whenever they update.. so i never thought of updating mine

Originally Posted by trefling
After I got my UTEC things (the engine) seemed to not be running smooth as id did with the factory ECU
I agree.. but then again i am paranoid
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Old Oct 31, 2006 | 03:32 PM
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I"m not trying to put down the UTEC but I just want people to know some first hand experience before rushing out and buying one
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Old Oct 31, 2006 | 03:34 PM
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well its still your opinion... you still have to go againt shop that are constaly posting here that are excellent tunner of the utec and they will jsut tell you this...its all in teh tune... that is why i responded that there is somethign there you might not have right
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Old Oct 31, 2006 | 04:43 PM
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<----Fcon Vpro O.G, i told you guys 2 years ago to get this.....
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Old Oct 31, 2006 | 04:48 PM
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Originally Posted by BoOsTedz33TT
<----Fcon Vpro O.G, i told you guys 2 years ago to get this.....
I'm glad your still a Z owner!^^^^^^
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Old Oct 31, 2006 | 05:00 PM
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Originally Posted by BoOsTedz33TT
<----Fcon Vpro O.G, i told you guys 2 years ago to get this.....
Like I wrote before I had the "three great" Greddy EU,and UTEC. Save your money wait a little get an FCON! If you ask anyone on this forum that has a FCON if it was worth the $$$, 99% will say hell yeah! I know its hard to justify $3000 on a ECU but its worth it.
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Old Oct 31, 2006 | 05:21 PM
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I wonder what happened to the AEM system? My friends RX7 has the AEM system and cot damn its awsome. Im a total newb and even I could understand everything thats going on in that program.
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Old Oct 31, 2006 | 05:42 PM
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well its still your opinion... you still have to go againt shop that are constaly posting here that are excellent tunner of the utec and they will jsut tell you this...its all in teh tune... that is why i responded that there is somethign there you might not have right
Sharif from Forged installed/tuned my UTEC so please don't tell me it's all in the tune as most people would agree that he knows his way around a UTEC system.

Do you even have a UTEC?
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Old Oct 31, 2006 | 06:03 PM
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I would be williung to bet that most of you have A:F ratios that are ridiculous ly rich at low boost/part throttle. That is what is causing the hestitating and throttle let off bucking.

i have done tons of part throttle on/off boost logging and I can guarantee that is the problem.
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Old Oct 31, 2006 | 06:29 PM
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WHAT!!

I just purchased my UTEC! this thread is scaring me....

with, FCON do you lose traction control, A/C, cruise, navigation?? what do you lose I'm really not sure!!!
Anybody know!!!
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Old Oct 31, 2006 | 06:31 PM
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HKS VPRO is the best there is...period

Some of the bigger shops like SGP Racing will tell you straight to your face that they simply don't like the UTEC and that it simply can't process signals fast enough for their approval
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Old Oct 31, 2006 | 06:35 PM
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Nice thread...subscribing

Please continue sharing experiences......

I was very happy with the Unichip
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Old Oct 31, 2006 | 06:42 PM
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I like the utec. my installer spent alot of time tuning the partial throttle inputs so i don't get the shuddering that some people get. i also have the boost control solenoid and the map selector. i think for the money it's a great unit.
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Old Oct 31, 2006 | 06:47 PM
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Originally Posted by trefling
HKS VPRO is the best there is...period

Some of the bigger shops like SGP Racing will tell you straight to your face that they simply don't like the UTEC and that it simply can't process signals fast enough for their approval
Yeah well a nissan dealer told me straight to my face the skyline is superior to the 350z and the350z won't accelerate fast enough for their approval. seriously why wouldnt a shop try to sell you the most expensive ecu they can. $3000 for the vpro, and then how much for the install and tune? i'm not knocking the hks unit at all, it's a nice peice of equipment, but just not for everyone budget. i've had the utec in my car for awhile now and everything works as advertised.
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Old Oct 31, 2006 | 07:17 PM
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Originally Posted by trefling
Sharif from Forged installed/tuned my UTEC so please don't tell me it's all in the tune as most people would agree that he knows his way around a UTEC system.

Do you even have a UTEC?

YES I DO =] and, next question have you been fi before
cause it beats any ecu i have had professionally tuned and all... again its very unfair if you are going to compare it to fcon pro as the price range cost its way too much, probably you wont pick any whp more actually, the ride will basically be just smoother... but anyways again have you been FI before? cause the way the ride feels with the utec, although not stock is as good as its going to get compared to a stock feel, without running a system like (aem, hks)

you are so hung on sharifs opinion then ask him... he will tell you of course the FCON pro is a better system, plus well.. all of the other costs, but its just not fair to compare it to the utec. which BTW a 1k ecu is not cheap by any means.

Last edited by IIQuickSilverII; Oct 31, 2006 at 07:38 PM.
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Old Oct 31, 2006 | 07:24 PM
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Originally Posted by trefling
HKS VPRO is the best there is...period

Some of the bigger shops like SGP Racing will tell you straight to your face that they simply don't like the UTEC and that it simply can't process signals fast enough for their approval

again this is unfair to compare... 98% of all FI people are probably running greddy, unichip, split second, UTEC and such other systems and have no problem at all.... you cannot compare FCON to the UTEC as its in a different class, its costs way more, can only purchase it a certified dealers and tuners. So who ever has bought the UTEC, you are fine, who ever has bought the UNICHIP is fine, a right tune will be good... you are looking at a 350z system in the 620+whp then look for the FCON pro.
You want to run an FCON PRO on a system for 400 whp.. well that is fine, just way overkilll.... like running sleeves on a a stage 2 Stillen S/C for example.

id personally rather spend 1k on the utec, and the other 2k on a twin plate carbon clutch for example.... at some point once i got over 620+whp i will consider the fcon pro... but dint make unfair comparisons and make this thread like if you dint have the fcon pro you are running a high risk with the utec or something is majorly wrong with your setup

Last edited by IIQuickSilverII; Oct 31, 2006 at 07:36 PM.
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