simon911

Hi, just had a ecu chip and pulley upgrade from a very reputable tuner. I am disappointed with the performance. I was expecting quite a difference, but dont really notice any? What do you recommend I do.

Jrocket

Talk to the tuner.

simon911

done this already, they said the upgrade is fine and the car is very quick. he also said there could be something wrong with the car and will plug it into the merc diagnostics to investigate further. anyone ever experience a disappointing upgrade?

dsc

Old rule of thumb -- dyno before and dyno after. If you have no before dyno get a post dyno done and see how that dyno compares to other members numbers.

AdamG@NorCal

Who's this reputable tuner if you don't mind me asking?


Cheers,

Adam

tigerlam92

Absolutely. Not just for the power gain, it is also very important to know how well the tune is for the car.

"The upgrade is fine" or "the car is very quick" means little without dyno and/or timeslip.

Also, you should check your IAT and make sure your IC pump can handle the increase in heat from the pulley upgrade and tune. The tuner should have known of this already.

Good luck.

jangy

There are plenty of people that end up unhappy after a mod. You gotta give us more info. An oddity I see now is that you say they say the car is strong and that something may be wrong with it. Which is it?

Leason learned: Always pre and post dyno on performance mods. ALWAYS!
Be clear with the tuner on exactly what you think you are paying for and make sure they are planning to deliver.

Last point. The bang for the buck on these cars is the stage 1. A pulley and ECU should have given you 50/50 and be VERY easy to feel.

chiromikey

it's been said enough but i'll say it again...pre and post dyno is money well spent.

now all you can do is get a dyno and work backwards.

spinsonic

+1

I am curious as well, if ecu and pulley make any difference. would hate to drop a few grand and not even notice a damn thing.

a $250 sprintbooster sure makes the car feel strong and fast

TonyJ89117

I second that. Also, which ECU and pulley did you install?

simon911

thanks for the reply. I will wait till the tuner solves the problem first as I would like to give him a chance to sort the problem first.

jangy

You can always reverse the process and dyno, if they really want to help.
Kudos to you for protecting your tuner. I hope they step up for you.

DFW01E55

I got 50+ hp and 80+ torque for an ASP pulley swap that was also helped by a new IC pump.

You will notice it.
My SA was very impressed, of course he doesn't know about the pulley.

Dyno results

Dyno before and after as many have instructed.

NGS_E55

longshot

Jrocket

A pulley and ECU makes more power,an SB will make you think you have more power,but it really doesnt.

TonyJ89117

Those are great numbers!

Did you do an ECU flash as well or just the ASP pulley?

Are there any negatives to the pulley install? I read somewhere that driveability is affected, with jerky throttle response. Is this true?

Thanks

DFW01E55

No ecu work at all, the increase was all pulley and of course whatever benefit came from the IC pump.

I do get a slightly jerky response on occasion. I don't care ... the feeling of having my eyes compressed into the back of my skull by the additional torque is addictive.

You can reduce the jerk (the following is an opinion, not experience) by installing the VRUS tensioner kit, as it will reduce the amount of belt slippage and I believe that is related to the jerky feeling. (I'm open to correction by those more knowledgeable.)

I think the sprint booster can also reduce the jerky feeling.
Bottom line is that it's a minor inconvenience compared to the benefit.

StealthAuto

I would talk to the tuner asap. Something sounds fishy. If I can help in any way let me know

-Aaron

spinsonic

I dont like the feeling of my "eyes conpressed into the back of my skull", but do enjoy getting a good whip lash!

notice you said $1200 mod in your post. what exactly did you get?

waxking1

That is a huge difference in torque. At 3100 rpm you have about 200 lb/ft torque more than stock and it doesn't drop below 100 lb/ft difference until around 4200 rpm. Very impressive. There are also points where the HP has increased by over 100. I would have to think the IC pump is responsible for a lot of this.

DFW01E55

That's the pulley and installation labor.

simon911

will the sprinbooster make much difference to a car that has been modified. I thought after an ecu upgrade an SB would not be required. Has any of you fitted a SB to a modified car? Any good?