Run Data, Turbo ?

Charles Young · Oct 21, 2016

I'll preface this with the fact that I don't have much seat time doing this and I may be way off base but......

Installed a Powerlogger logger recently and took the car to the track last night. I was real slow (8.55 in the 1/8) and had terrible 60' times (2+). I have only made two runs in the car before last night but did better that time (7.9 in the 1/8) Last night, it felt like the car was really slow off the line and then "kicked in" a little ways down the track. What I think I see on the PL file is that it took 2.7 sec for the turbo to spool up from 1.7 psi at launch to about 20 psi. That seems like a really long time and I don't remember it feeling that way the first time at the track. I don't know for sure about the combo in the car but per PO it has a TE53 turbo, 3200 stall converter and 60# injectors. PL file is attached, I hope.
Am I seeing that spool time correctly? Any other observations would be much appreciated.

Thanks,
Charles

Charles Young · Oct 21, 2016

I know boost went higher than 20, I just used that as a reference point for discussion.

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69RSCLONE · Oct 21, 2016

Cracked manifold/header, or other exhaust leak? Or waste gate puck not covering the hole completely or seized open, if still internal gate. What kind of down pipe?

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Charles Young · Oct 21, 2016

Still has the internal WG. The dp is an older one from Gbodyparts I believe. Thanks for the input, I'll look into those possibilities.

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SCOOBY DOO · Oct 21, 2016

It's taking forever to boost. Check the puck to make sure it's sealing.

SHADOWII · Oct 22, 2016

Try to list all your known mod's in your sig so as to reduce the amount of assumptions on our part and it will lead to better educated guesses for you. Also check for too much play on the w/g rod adjustment. Should be none.

Charles Young · Oct 22, 2016

SCOOBY DOO said:
It's taking forever to boost. Check the puck to make sure it's sealing.

Are you able to look at the PL file?

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SCOOBY DOO · Oct 22, 2016

Charles Young said:
Are you able to look at the PL file?

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Charles...yes.

Charles Young · Oct 22, 2016

SHADOWII said:
Try to list all your known mod's in your sig so as to reduce the amount of assumptions on our part and it will lead to better educated guesses for you. Also check for too much play on the w/g rod adjustment. Should be none.

Updated Sig, think I got everything!
Will check WG.
Thanks for the input gents.

SCOOBY DOO · Oct 22, 2016

Charles...slide under the car and verify the torque convertor.

Charles Young · Oct 22, 2016

69RSCLONE said:
Cracked manifold/header, or other exhaust leak? Or waste gate puck not covering the hole completely or seized open, if still internal gate. What kind of down pipe?

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69RSCLONE said:
Cracked manifold/header, or other exhaust leak? Or waste gate puck not covering the hole completely or seized open, if still internal gate. What kind of down pipe?

Sent from my SM-G935V using Tapatalk

Maybe a dumb question but wouldn't I hear a cracked header or manifold?

SCOOBY DOO · Oct 22, 2016

Charles Young said:
Maybe a dumb question but wouldn't I hear a cracked header or manifold?

Possibly not. Check both headers, crossover pipe and the turbo flange. Any exhaust pressure escaping to the atmosphere...will cause slow spooling.

Charles Young · Oct 22, 2016

SCOOBY DOO said:
Charles...slide under the car and verify the torque convertor.

I can try but always heard it was very hard to tell by just looking. Any pointers as to how to do that?
Also, I'm not looking at it now but thought the PL file appeared as though stall was around 2800 (0 MPH, 1 psi boost, 2800 or so RPM) or something to that effect.

SCOOBY DOO · Oct 22, 2016

Charles Young said:
I can try but always heard it was very hard to tell by just looking. Any pointers as to how to do that?
Also, I'm not looking at it now but thought the PL file appeared as though stall was around 2800 (0 MPH, 1 psi boost, 2800 or so RPM) or something to that effect.

They're will be numbers/letters somewhere on the outside of the convertor. Spin it around...you'll see 'em. What size exhaust housing is on the turbo?

Steve V · Oct 22, 2016

Take off a vacuum line and feed the engine some ATF through it. Then look for smoke at header joints etc. If you see smoke you got a leak.

Charles Young · Oct 22, 2016

Steve V said:
Take off a vacuum line and feed the engine some ATF through it. Then look for smoke at header joints etc. If you see smoke you got a leak.

Now that sounds pretty cool.

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69RSCLONE · Oct 22, 2016

Do it cold. As it heats up the cracks or gaps at mating surfaces will tighten up and make it harder to see

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Charles Young · Oct 22, 2016

OK guys, thanks for all the input. Looks like the puck wasn't sealing completely to the WG. I had lengthened the arm one turn a few days ago in prep for tuning it up at the track. Apparently that one turn lengthened the arm just enough to keep the puck from sealing. That may not be my only problem but it seems to have made a big difference. I just shortened the rod by one turn. Just came back from the "track". Please take a look at the attached. Less than 1 sec to boost to 20. How accurate is this data? If I'm reading right 0-60 is about 4.17 sec. Is that accurate?
Thanks for all the ideas!!!

aminga · Oct 22, 2016

Trans looks bad like it's slipping the shifts are lazy

Charles Young · Oct 22, 2016

aminga said:
Trans looks bad like it's slipping the shifts are lazy

I was wondering about that but didn't know exactly how it should look. Which log
are you looking at, or both of them?

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