Tuning Gurus: help please

[AleroB888]

2.46094 2.85938 3.28906 3.76563 4.29688 4.89063 5.53906 6.25000 7.02344 7.86719 8.77344 9.72656 10.73438 11.81250 12.97656 14.21875 15.56250 16.99219 18.51563 20.14844 21.89844 23.77344 25.78125 27.89844 30.10156 32.36719 34.71094 37.16406 39.71875 42.38281 45.18750 48.12500 51.19531 54.47656 58.02344 61.77344 65.71094 69.85156 74.10156 78.52344 83.10156 87.79688 92.71094 97.81250 103.15625 108.77344 114.57031 120.57031 126.75781 133.14063 139.70313 146.39063 153.27344 160.25781 167.51563 174.94531 182.64844 190.58594 198.76563 207.19531 215.89063 224.85938 234.10938 243.64063 253.48438 263.62500 274.09375 284.89063 296.03125 307.51563 319.36719 331.59375 344.19531 357.19531 370.60156 384.42969 398.67969 413.36719 428.51563 448.93750 463.38281

[Redog]

Originally Posted by AleroB888

If you hit the "quote" button under the post (as if to reply to the post), then copy the table out from between the quote tags, you can paste it into the HP tuners MAF table. ............worked for me....

http://www.grandamgt.com/forum/showt...table&pag e=2

Sweet!! thanks!

[Redog]

where do I put that?!?!

car is missing and stalling like crazy now, I haven't put in the ls1 program yet but the ls1 maf is in the car

[WhiteV6]

If you want to send me your file and your latest scan, I can help you out. I have some cfg files that might help too.

[Redog]

OK Ben. I will do that tomorrow afternoon. I have to go to work shortly.

The files I can understand, but the "scan" do you mean those charts?

[WhiteV6]

Yes the scanner config file, so you record what is needed.

[Redog]

OK Ben. I'll do that tomorrow afternoon.

PM on here OK?

Thanks again

[XanderWiFi]

This is the first thread I have seen about scanning a 3.4. Ion and I were making adjustments to my 3.4 but he was not completely sure what the transmission pressures should be since he has a 2.4. So we just levelled all the transmission points evenly to have nice, smooth and even gear shifting. Does this sound correct to you guys?

[BlackJack]

not sure what you mean by "leveled all the transmission points".

Shift pressure on a 4t45 should never go above 96psi, and should only hit that number when you're at WOT under heavy load. Shift pressure and shift time (amount of time it takes to transtion from one gear to the next) should be incremental based on torque.

WOT (99.6% TPS and higher) commands shift points by RPM. Anything below is regulated by MPH.

[XanderWiFi]

Next time I go to tune my car is there someone who can walk me through the transmission section by chance? And for a stock 3400 how much would you advance the spark? We were planning to just do it +2

I guess the best way I can explain it is there was a graph with uneven peaks and pressures. If I remember correctly it moved in an ascending ladder like pattern to represent each respective gear shift-except my stock tune is very uneven. The way we tuned it was to level all the "rungs" of the ladder so they were nice and smoothed out and actually looking like a ladder.

However, the software isn't updated enough with hptuners to read my 2004 for whatever reason...so I am awaiting an update. Hopefully ion takes a look at this, maybe he can explain it better?

[BlackJack]

Originally Posted by XanderWiFi

And for a stock 3400 how much would you advance the spark? We were planning to just do it +2

I wouldn't do a spark advance generically across the board in a 2 point increment.

First order of business is to decide on what octane fuel you plan on running, because once you get your timing down the way you want it on the fuel you want, you need to stick with it. I personally like to leave a little margin of error since the fuel has some variances as well.

For starters, I'd bump it up 1 degree at a time across the board and go incrementally. Once you start seeing KR in a particular cell, try to tune out the KR through adding a tiny bit more fuel. If adding more fuel doesn't sort out the KR, then back the timing off a degree in that cell and put the fuel back to where it was when you started. By using this method, move the cells up again, and repeat. Once you have your entire range adjusted the way you want it, start smoothing out the timing curves so there's no erratic jump from one cell to the next that's inconsistent with the other cells around it.

Just make sure you have all the mechanical issues sorted out that can cause false KR readings. Some of which are making sure all your bolt-on's are fastened tightly. I've had a slightly loose nut on an exhaust manifold cause KR before. Check your engine/trans mounts, etc.

Here's a basic guide to tuning timing. Don't use the numbers in the tables, since every engine is different. Just pay attention to the methods.

http://www.turbov6camaro.com/safr.htm


Good luck.

[jabartram]

Blackjack are you still using DHP or have you changed over to HP tuners?

[XanderWiFi]

Something tells me I should probably just find a professional to do this...with the tuner ion and I bought we don't have a wideband so we cannot adjust air/fuel ratios.

I'll check out the link in hopes I can understand better. Makes me feel better I didn't have the ability to make the changes...might have really messed something up. Can I contact you further with any other questions I may have?

[BlackJack]

I'll be temporarily unavailable for about the next month. Once I'm re-established online hit me up.

Originally Posted by jabartram

Blackjack are you still using DHP or have you changed over to HP tuners?

HP Tuners. Ben showed me the light. Much more versatile, and easier to use.

[XanderWiFi]

Is it even worth it to tune a vehicle that only has a CAI, high flow cat and 2.5" exhaust? Can there really be any gains that will outstrip risks?

Originally Posted by XanderWiFi

Is it even worth it to tune a vehicle that only has a CAI, high flow cat and 2.5" exhaust? Can there really be any gains that will outstrip risks?

Absolutely.
I've been reading Greg Banish's book on Advanced Engine Tuning and even just a CAI makes changes to the pressure wave in the intake tract that you should tune to get optimum benefit.

[Redog]

I still have that P0135 code in my car and for some reason my laptop will not reconigize my HPTuners box

I think it's the ground pack for the O2. going to look at it over the weekend. Right now we have 8 inches of snow on the ground in NE Philly.

Still waiting on my WB A/F gauge. Ordered it back in March '10. Found out it doesn't get released for sale until Janurary '11

[XanderWiFi]

And is it still worthwhile if you do not have the wideband to change air/fuel ratios?

[Redog]

You need the WB so you can tell what the fuel curves are. Without it, your tuning blind and there is a very good chance you'll hurt the engine

[XanderWiFi]

So I need to get Ben's hptuners pro set...