power logger?

[Tim Hensley]

Do I really need a power logger ?two weeks ago I finally got it  solid in the 11's, 11.96 @112mph,6 passes ,1.75 60ft ,1/8 mile 7.6@91mph so consistent.Thi s week 12.05-12.33 @110-111mph 1/8 7.88-7.68@88.7-90.8 with my best 60's ever 1.38- 1.44.
My 0'2s where 750's  this week it was ,695 on my fastest pass 756.Made 4 passes first two was my bad.After two bo bo's I got every thing back to last weeks settings and I was ready.My best 60's but no ET to show for it.

[Steve Wood]

There are experienced guys out there that have run much faster using only a Scanmaster to stay out of trouble.  The PL is outstanding for fine tuning, troubleshootin g,  and seeking help from others.  One of the great benefits is the ability to observe the behavior of a number of parameters at the same time which allows one to understand their relationship and determine a common cause when things are not right.

You don't say if you are running race gas, or alky, but, 750 is pretty much right on  for Alky and 695 says it is a wonder you did not blow the hgs=that sounds like you were running alky and not getting enuf gas, but I have no info other than experience to make that guess.

Your short times were fantastic for a car not making any more hp than yours and it looks like about .4 tenths of your quarter mile times is coming from your short times If you are routinely in that area.

Looks like the car only picked up about 22 mph on the last half which is a bit weak.  Not sure if that is from running too lean or from weak valve springs.

This is a case where PL would give a lot more data that might help understand what is happening.

[Scott87]

It cannot hurt to have one.  The extra and easier to see and quantify data can only make your tuning that much easier.  You will want to get a wideband o2 to use with it.

If the data is good then you will be able to make better decisions tuning with a logger than without.  Without you are either making decisions from experience? Or you can be shooting from the hip? 

With the logger you can see shortcomings of equipment if you are logging them.  An example would be logging fuel pressure.  You could use the information and see the pump could be week or failing? You may or not see this information without logging.  In this example the logger can become a preventative maintenance tool.

On the other hand, the adage of if it isn't broken don't fix it..  Or KISS.

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[ULYCYC]

Are you sure about those 60ft times?   A 1.36 would equate to a car  in the 9.7 et range.   You would have to be launching off a trans brake at 15lbs of boost and wheels up.  Unless there is more to your build we don't know?

[Tim Hensley]

Yes the the car is on ALKY and scanmaster is in the 750-780 most of the time 40 miles home HG OK.
Just installed a Wide band not use to looking at it,no help there.
21-22 mph  pick up is this cars MO for the past 20 passes convertor  locked or not locked,locking @85 gave me 2-3 mph and 12.0 to 11.9
I cant fill the convertor lock on the track but locks fine on the street to and from the track
I prefure the KISS tuning
The 2step has not changed (2900 6* retard)but it was 12lb not 10lb like it had been.
My jaw dropped with 1.44  then 1.38 60ft and the ET was 12.0   I'm not convince those 60ft are right even the 12.0s.
It is a different club this week ,the Outlaw club just run test and tune.this is where all my 11.90 slips come from,This club  runs a Pro Gas program Im trying to run the 11.90 class
Me and this club have gone round and round about safety equment they want 3in belts and trans blanket I did buy the jacket,dont see how they can miss with the lights.IRHR rule book says the car is good to go
Started this thread last night after getting home with a little frustration,this car has not been this inconsistent the last 20 passes and this slow last 10

[Tim Hensley]

with all the strange numbers ill wait for the next Out Law race date If I get same strange numbers ill be looking for a logger.
Where do you put the laptop?

[Steve Wood]

the converter is not locking...not at wot.  Does it lock at light throttle?

Where you put the lap top depends on the track....if they are strict, they will not let you put it in the seat, I am sure.  It will have to be fastened down.

[Tim Hensley]

Yes the convertor locks on the street good and saloded.
Where is your laptop in the car ,you have to hit the spacebar to recoded ?
A logger will tell the story on lock wish the logger was like Racepack.

[Steve Wood]

You can set the PL to start by a tps number.

No, it may not tell the story.  It will only show if a signal was sent, but, not if it actually locked up.  A worn pump or bushing will allow the excess pressure to bleed off and the converter will not lock  at wot whereas it may get enuf pressure to lock at light throttle.

[Tim Hensley]

Should so RPM drop at 85 mph
I have been looking at some pic can't see where the laptop is stored in the car

[Steve Wood]

At one time, someone made a bracket to hold a lap top.

I suspect most people use it for tuning but not during actual races.

If you cannot feel the converter lock, it is not locking-

[SuperSix]

Should so RPM drop at 85 mph
I have been looking at some pic can't see where the laptop is stored in the car

During normal cruising, the TCC should lock at 45 (Assuming the chip is programmed this way), and you should see a 2-300 RPM drop when it does lock.

[Steve Wood]

He said it works in normal driving...he does not feel it at wot when it should lock up at 85.   Should feel like a gear change or a bit lighter.  Normally this is a pump problem, or simply a converter that did not handle the stress very long and burned the clutch

[Tim Hensley]

I would just tune and monature at strip it has to be pluged in to do this ,no menary card in the logger?

[Steve Wood]

download the manual...pl hardware is plugged into the engineering port of the ecm    http://www.fullthrottletech.com/showthread.php?t=2645

maybe you can get by with using a seatbelt to retain the laptop