daBlue

Hi All,

I am starting this thread hoping to get some advise from the pros out there ... I have a 2008 G with the FI Cat-back Exhaust and the Stillen 3rd Gen Long Tube Intakes installed.

I have taken the Car for a Dyno and I was shocked to see that it only showed 240HP on the run.

I had not used UpRev yet as i wanted to make sure that I know what has happened to the car after tuning it. the tuner is not an expert on the UpRev application but he is a professional tuner for American Muscle cars (i.e. Corvettes and Chevys) and knows pretty much what he has to do with the map (at least that is what I hope )

The result was the same after changing the map 4 times. The car is lean and even when i drive it, i feel there is more power to be unleashed and it is somehow hidden in the car. The A/F was showing to be around 14.9, which i believe is high and it should be between 11.9-12.9 (can anyone confirm this?)

Also, I am in love with the FI exhausts sound and the support that Tony provides me (be it on the phone or via emails). I had purchased the FI exhaust with the Magnaflow middle pipes and Tony has recommended that I shift to their new X-Pipes.

Questions I have:

1. Would there be any noticeable difference in performance if I install the x-pipes (anyone out there who has the same problem as i and has changed to the x-pipes and realized a difference?

2. Can someone provide me with feedback of the performance of the car after installing the FI longtube headers? What about the sound of the car (exterior) and the noise inside the car?

3. Can anyone help me with some basics about the UpRev application? (I have read the manual and tried everything so unless you are willing to help then please don't just tell me to read forums coz i have done a lot of that and honestly didn't find any useful information.

4. for the UpRev, do i need to change the A/F ratio only or do i need to change multiple tables before i can get a proper change in the car performance?

I appreciate all your comments and help on this matter ... I am currently feeling like about the car despite being so in love with it ...

G37Sam

If your AF ratio after your tune is at 14.9, then you need to ask for your money back and find another tuner who knows how to actually tune a car. Uploading maps to an ECU from the internet is not exactly tuning.

1) I don't think you'll notice a difference from swapping out x-pipes. Unless your butt dyno is very sensitive.

2) Long tube headers will definitely make your car louder inside out. As for performance, you'll notice slight gains yes.

3) The manual teaches you how to use the UpRev software, it will not teach you how to tune an engine. So unless you want to lose your engine, do not try to play around with numbers in the tables.

4) A/F ratio & Ignition Timings, they go hand in hand. Again, let a professional handle this. You may have to drive down to Dubai for that

Hope that helps

ANMVQ

iTrader: (13)

Agree with G37Sam, at 14.9 get your money back, At that AF you car is a ticking time bomb. Find a UPREV tuner from their website and talk the car there, Will be well worth your money. EX I had the same modes and you and made 298WHP, On a heartbreaking Mustang Dyno,+ I had a 7SPD auto and AWD.Go to a UPREV tuner..
Please do not waste your$$$ on Headers the WHP gain you will get will not offset the cost or noise ( loudness) they will create.

Again only let a VQ and UP tuner tune it... Just as G37Sam stated.

Kevalteam

iTrader: (122)

Contact ECain18 on this forum. He has FI long tube headers on his car. For advise and sound. GL with future mods and UPRev tune. You will need HFC or TP plus your exhaust and intake to get the max out of your tune.

eksigned

iTrader: (1)

what are of the states, or...world, are you in?

G37Sam

He's in the middle east

egmmbah

iTrader: (2)

WOWZERS 14.9 A/F i also agree you are a ticking time bomb. . . . as for making 240 whp thats pretty low :-/ try looking for a new dyno, there is a stack of boxes known as hardware stack (optical RPM Pickup, Module Box, Wideband Box, Analog Module) Make sure they are up high, away from heat, but a fan near them if you need to. Those boxes being in bad condition, or hot temperatures will cause extremely false dyno readings and cause a tune to appear to be good and isn't. . . On a DynoJet i made 306.34 with IPL exhaust, custom cold airs, IPL computer, with A/F of 12.04

G37Sam

What do you mean by IPL computer?

37hevn

iTrader: (1)

dont do headers, dont do xpipe. get an aluminum driveshaft/ 4.09 rear end. they are better that headers money and performance wise. i doubt i will follow this so if you go with headers and find out they didnt do what people said remember my post saying i told you so.

your 240 hp is fine. people think its low but they dont realize dynos are different. just keep using the same dyno if you like the people. they can make the dyno read whatever they want by adjusting stuff. just saying my car started around 240 and im at about 290 on the same dyno after my bolt ons. i dont have the driveshaft or the 4.09. i wish i had the driveshaft. i already have the 5at so the 4.09 would kill my already horrible mileage

G37sEugene

best of luck with whatever mods you go with.

lilenday

Yep thats really really lean. I had my car tuned around 11s.

mtrsprt

Rear end gears are your friend and very easy to install. You should shoot for 11.9-12.5:1 for an N/A-A/F ratio above 3K rpm. 50rwhp isn't happening with exhaust/intake bolt ons. It just isn't.

1cleanG

iTrader: (53)

eh, I've actually seen near those #'s proven and posted with guys anywhere between 304whp and 320whp. All Naturally aspirated.

mtrsprt

Gotta love a 10% dyno variance also.

304rwhp is feasible sure. 320 is going to take a small miracle and a generous dyno.

This isn't LS1 or Mustang world.......

G37Sam

It's not about the final number, it's about the gain. A dyno can be configured to show you 400whp on your N/A G but that really won't mean anything