WOT chip questions.

[havik]

i've got a 93 z34 lumina. i'm really into racing. i was reading the discription and had a few questions.

DOHC motors pull in the high end. i dont want to over kill the motor or tranny, or even cause any accelerated damage to either. what would be the safest ship points for each gear to extrend the high end pull?

8-10 HP gains. any torque?

whats the stock rev limit and speed limit at? in gear/neurtal/park.

any other options that would be good to know about tuning with this chip?

thanks a bunch. very intrested.

[SappySE107]

RE: WOT chip questions.

Torque was increased at about the same rate as the HP, 8-10 range as well. The trans doesn't like going past 6800 though it will. A second trans cooler would be a great idea as the stock setup doesn't really cut it with the heat produced at higher RPMs. With stock cam timing, the stock shift points are pretty decent, though they are set as MPH in each gear and not RPM like you would think GM would have done. Some people like having them raised a bit, and others have asked me to change it back. You can try anything you want, and send it back if you want to try it somewhere else or back to stock.

Stock rev limit is at 6500 in gear, 3000 in P/N. Stock speed limiter is 120.

For the automatics, I recommend running a 6/6 cam timing (6 degrees advanced intake, 6 degrees retarded exhaust). If all you want is 4k+, 13 degree exhaust retard and stock intake is what I would use.

Aside from the peak gains, the powerband is extended quite a bit at the upper RPMs.

[Anonymous]

so you can you change the shift points from speed to rpm? i was thinking i could raise the shift points to just before the yellowline on each gear. in which case the speed limiter would have to be taken off cuz the speed would be spread through the gears in a greater amount.

what would the 6/6 cam timing do? what exactly is it? lol. whats the perpuse for this tuning option?

park and neutral limiters are definatly comin off. i cant stand how the car sounds whiel its raced in park. i need to hear that high end sound while standing still.

sorry for all the questions. i need this thing tuned just right and i wanna make sure i take full advantage of every option it has. thanx a lot though. major help.

[SappySE107]

I don't recommend raising the park/neutral rev limiter, because if something happens like a bad vacuum leak, things can get ugly. Up to you, its not my motor.

I can change the speed in which the trans shifts, but I need to know what MPH you want each shift. THey can be changed at part throttle as well, but WOT shifts are 41 MPH 1-2, 80 MPH 2-3, 104 MPH 3-4. 42, 83, 120 is one option I have tried and a few people liked it. 45, 85, 120 is another being used, and anywhere in between could be done, maybe higher though I wouldn't bother trying to take the stock motor to 7000, especially with stock cam timing.

The cam timing mod changes the powerband and power output. Retarding raises the powerband, advancing lower it. THe 6/6 is a split of the 13 degree timing that my friend and I found to work out really well for top end. Since the automatics work out much better with more midrange than top end, someone else tried the 7/6 timing with great sucess. I use 6/6 right now to test it out, and my gas milage did go up but my 6300+ power is all but gone. Some tuning changes helped with the top end with this timing though compared to the 13* retard chip tuning.

[havik]

can you change shift points by gear ratio?

and whats the gas/spark option? to increase gas milage?

and if i choose to change shift points via MPH..what would those normal changes that every1 usually get do for me? increase the pull at the high end slightly? expample..with the 42, 85, 120 option..why change it to those points?

and what is the perpouse of changing the idle rpm. i knows it to allow smoother idle..but why?

[SappySE107]

What do you mean by change the shift points by gear ratio. If you changed your gear ratios, then you would need to change the shift points in the computer if you don't want them to shift at the programmed MPH anymore.

What gas/spark option? I have no idea what you are talking about there. Lean cruise enabled gives better gas milage when you are at a cruising speed like on the highway.

The shift points don't increase power, they just allow better use of a powerband if you aren't running stock. Some transmissions will still not shift at the exact time the computer tells it to shift since it is still vacuum and the condition of the trans matters a lot. Setting it to 42,85,120 would make it go higher RPM when it shifts.

Higher idle helps with off the line response plus better cooling when the engine is sitting there.

[blk92z34getrag]

Since it's being discussed in this topic... what's the best / most recommended cam timing option for a 5-speed?

[SappySE107]

Well, it depends on the powerband you want and the idle. 6/6 is what im running now for better gas milage and around town driving. For the track, id go 13 degree. Others have gone 5/5, 7/6, 10/3 but like I said, its up to you.

[blk92z34getrag]

if 10/3 does show gains then I'll probably run that... I don't exactly want to sacrifice the idle quality any more than I have to. Plus... 20MPG 70/30 highway/street mileage isn't something I want decreasing either. Plus we know more overlap = more top end. Do you know who is running that setup? Or any comments they had? Once I do the timing once and get the hang of it I'll probably just mess around with different settings to find what I like.

You'll probably be getting an order for that cam timing tool within the next few month from me ;] thanks for the advice.

[blk92z34getrag]

if 10/3 does show gains then I'll probably run that... I don't exactly want to sacrifice the idle quality any more than I have to. Plus... 20MPG 70/30 highway/street mileage isn't something I want decreasing either. Plus we know more overlap = more top end. Do you know who is running that setup? Or any comments they had? Once I do the timing once and get the hang of it I'll probably just mess around with different settings to find what I like.

You'll probably be getting an order for that cam timing tool within the next few month from me ;] thanks for the advice.

[SappySE107]

I don't even remember. 6/6 gives better gas milage, and is the only one i know of so far that does have better gas milage with repeatable results (done on a 94 cutlass auto and my 91 grand prix 5 speed).

[napatiger]

I am getting a new tranny (broke my old case on install )

Ordered trans with 3.73 FDR instead of stock 3.33.
Car: 1995 Monte Carlo Z34 4T60E


Do I have to change the chip for the car to run without a problem?

In addition I will be getting 50 series tires; will that hurt or help my situation of RPM : MPH reading
ie. Hub rotates at constant speed (MPH reading), but with smaller tire car will be going slower than signal; therefor, changing gear at actual slower speeds (and lower RPMs) I think that will help just not sure how much


Ben, I think I can install the new trans, use old chip, and then figure what speeds I want you to set.

In addition I know that you are not 'done' with the 95 Chip yet, but I assume you can do this for me and update when available...

Thanks,

Mike

[SappySE107]

I know where the shift points are but yeah, the smaller tires and the 3.73 might be a problem with the stock rev limiter being set at 6500.

Im hoping to get some work done on the 94-95 chips during the 60V6 meet as well as some chip testing for chris if he has the time.

[Anonymous]

1/4 mile time..whats the shift speed, idle rpm, fan temp, and limiter sets? and what is the revised fueling and spark option?

[SappySE107]

what?