Got my car custom tuned and I didn't make the numbers I was hoping for after comparing it to other modified cars on the same dyno. What should be my list of things to check on?

I don't have my afr's from the dyno pulls and it only took 3 pulls to get my car tuned, is that normal?

I know I should check for boost leaks but is there anything else? The tuner said the car felt like it had a bad tank of gas in it but I go to the same gas station all the time and never notice the car feeling better or worse. Also my car was way down in the tq department, is this a sign of bad gas/boost leak/etc? Its an 06 so I don't think I need plugs yet.

 

More info please. Specifically your mods, what kind of dyno, what octane fuel, what e.m. are you running. These are all important pieces of info to begin answering your ?'s.

 

fuel filter, air filter, spark plugs, boost leaks...the list goes on

 

Well #1 as it appears you know is a boost leak. Did you get you boost tested on the Dyno?
#2 Yes gas can be a big problem I have seen cars make up to 20 less Whp from crappy gas causing detonation and timing being pulled. #3 check your plugs even though it's new you could have a bad one. I thought mine where fine then on the dyno my tuner noticed the graph was off and we checked them and replaced them whent up another 18fts in trq and 15whp. Also remember all parts are not made equally some are better than others.

All in all what did the guy running the dyno see can you post your graph it might help to take a look at it. You can usually see problems in your graph.

 

IX with all buschur parts: mbc, cone filter, turbo back, licp, ported manifold and o2 housing.

It came in at 346 whp and 318 tq on a dynojet, 24 psi. 93 octane ecutek reflash.

Tuner said the car felt like it had bad gas but he also doesn't didn't like my forge mbc and recommended swapping it for a hallman. The temp was 88* and humidity was 32% my hp/tq curve seem to be a little late compared to others and my lines are kinda squigly. He said he felt the car should hit 355+ whp with no problems if I had a good tank of gas but I thought that was kinda odd since I'm religious about where I go for gas, its a brand new Sunoco that I always fill up in, but hey you never know.

 

Do a search before you post your GREAT numbers man

Nothing is wrong with your car , just your tuners head

 

Holy cow, 346whp on stg1 mods, and you're thinking there's a problem? Unbelievable...

What the hell tuner doesn't like a Forge UNOS? That's ridiculous. The Hallman is great, but the UNOS is even better. It should have taken more than 3 dyno pulls to tweak the tune, too. IXs seem to have less of a torque spike than VIIIs on average, but it could also be the method of tuning. If there isn't some solid timing at peak boost, then the torque won't be very high. That's excellent power in temps that high - how was it so hot this late in the year? It would be nice if you acdtually gave us all the details on who tuned it, where you're located (fill out your profile, please), what tuning device was used, etc.

Btw, being religious about where you go for gas doesn't mean anything. It could always be weak or poor gas...or it could be one bad batch. It doesn't matter that you always go to the same place. Regardless, there are many, many IXs that don't make that much power on pump gas, and just a few that make more...

 

It would also help if you posted the dynograph so that we could actually do some analysis. Post the image and post the actual runfile (zipped). I'm also assuming it was a Dynojet, but you haven't told us that yet for some reason.

 

lol...those are great numbers! Are you sure you did not mean to type 246???? What kind of dyno is that?

 

In my 2nd post I said dynojet, I don't have the actual runfile and I don't have a scanner so maybe I should just try taking a pic of the graph? Or would that come out really crappy?

I'm not claiming I made terrible numbers but when I go through the forums I see people making 345-355 whp with less mods then me and I would like to get the car running optimal now before I just slap more parts on there to band aid my hp numbers. I already have a few more parts then the Buschur stage 1 so I was hoping to make slightly better numbers considering licp/o2/ported mani are worth 2-5 whp each.

No one said the forge mbc was a bad unit, just that they had heard of people having problems with them in the past.

Edit: Car also has a fuel pump, forgot to put that in my previous posts.

 

I already searched, I found several ix's making the same hp figures as me minus the ported manifold/o2 housing/licp and their tq numbers seem to be up around the 330-350 mark where as mine are 318.

 

You found MAYBE a few, but I bet you some of those are running more than 24psi. The turbotrix cars get tuned at 26 and sometimes 27psi on pump gas - they're crazy. You failed to mention that you found a LOT MORE IXs that made far less power than you, with or without those extra mods. Hell, one guy with Turbotrix cams and an FMIC didn't make more than you in his IX...

 

This is true and I'm not disputing that my car made good numbers but I had my heart set on 350-355 whp and 340-345 wtq and when I came up a few short I figured I would go home and check my boost and plugs and go back in some cooler weather and try and crack that elusive 350 whp mark.

Also the car was tuned at TurboTrix and I feel they did a great job but my car wasn't up to the task, obviously gas grade and maybe some maintenance pieces weren't up to par and they explained to me where I should look but I wanted to ask questions on here to make sure I checked ALL of my bases before going back because they even agreed I should be making a few more ponies.

 

Don't get caught up in the numbers, its the improvement from base that matters. Enjoy your car its still faster then 95% of the other cars on the road.

 

Yeah, those are horrible numbers. I'd drive that POS off the nearest cliff .... No kidding, any car that can only make 21% higher power at the wheels than the rated power at the crank is truly worthless. Anyway, just so you don't feel too bad, I'd trade you my '05 MR for it, I guess it would not bother me too much to have such a weak car as yours....