Author Topic: 60 ft blues  (Read 3886 times)

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Offline Tim Hensley

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Re: 60 ft blues
« Reply #90 on: August 12 2019, 02:54:40 AM »
first pass
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Offline Steve Wood

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Re: 60 ft blues
« Reply #91 on: August 12 2019, 10:53:36 AM »
Tim, which wide band are you running so I can set up PL, and how tall are your tires so I can figure the speeds (I assume you have not changed the speedo gears)...thanks
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Offline Tim Hensley

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Re: 60 ft blues
« Reply #92 on: August 12 2019, 01:45:17 PM »
AME  tire is 28 X9-15 pro bracket I think the log showed 3 mph slower than slip
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Offline Tim Hensley

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Re: 60 ft blues
« Reply #93 on: August 12 2019, 01:51:26 PM »
AEM my bad
Arizona GN109 forged rotating assembly
DLS 210-210
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Extreme Auto stage II trans and converter

Offline Steve Wood

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Re: 60 ft blues
« Reply #94 on: August 12 2019, 03:34:12 PM »
The mph is kinda strange.  It's only a couple percent off and it should be closer to 8%.  It reads like my car did with 28 inch tires and a 27 tooth speedometer gear instead of the stock 30 tooth gear.


The short time is slower than I would expect, but, it may simply be the track prep.  I don't know how sticky the track is and that makes all the difference.  Looks like the tires are breaking loose a little right after launch according to my look at the mph/rpm curve bump.


The top end mph is probably about right because you are not running very high boost and the car looks rich to me.  If it were me and I was looking for more performance, it would set it to 27 psi for a look.  The boost control is still a bit wonky at launch for some reason.  Kinda wonder if that comes from a bit of wheel spin that drops the load on the engine a little for a short time.


Given the above, I don't think I see anything really wrong with the run, or the car.  It's probably running about right for the boost level.


Not knowing anything about  your local area, is the humidity high?



« Last Edit: August 12 2019, 04:06:43 PM by Steve Wood »
Steve Wood

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Offline Steve Wood

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Re: 60 ft blues
« Reply #95 on: August 12 2019, 06:12:38 PM »
one thing I just noticed (if I calculated right) zero slip in the drivetrain should have given you about 131 mph...  or about 11% slip.  I guess that is not that bad after thinking about it.  Probably cost a lot to get much less.  :cheers:
Steve Wood

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A lot of broken parts does not make you a racer; it makes you a slow learner.

Offline Tim Hensley

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Re: 60 ft blues
« Reply #96 on: August 12 2019, 06:24:46 PM »
Thanks for your kind words
Speedometer is close 255 -60 tires and the radar speed limit sign is 1 or 2 mph off think I have a 27 tooth. Itís a Turbo smart controller I can probably tune that spike out , might go away if i turn it up to 27.
Yes that pass wideband correction is 10.8 last pass 11.0 slip looked the same just 1 mph slower at1/4 and 1/2 mph at 1/8 mile
Hawaiíi is humid 60% today I think it was over 50 on Saturday track is close to sea level temperatures 85 88 max.
Arizona GN109 forged rotating assembly
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Extreme Auto stage II trans and converter

Offline Steve Wood

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Re: 60 ft blues
« Reply #97 on: August 12 2019, 09:22:21 PM »
humidity never helps as it takes up some of the room that air molecules could be occupying but that is not too bad.  Long ago, you said Lonnie or someone said bump up the stall and that would help because it would probably like leaving at more boost and rpm, but, I would practice driving and being consistent since you are not contesting anyone in particular.  Enjoy the car for awhile  :cheers:
Steve Wood

http://www.vortexbuicks-etc.com

A lot of broken parts does not make you a racer; it makes you a slow learner.

Offline Tim Hensley

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Re: 60 ft blues
« Reply #98 on: August 13 2019, 02:46:31 AM »
Always good advice on this form. Enjoy the car is just what Iím going to do.
Arizona GN109 forged rotating assembly
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Offline Scoobum

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Re: 60 ft blues
« Reply #99 on: September 07 2019, 09:17:10 AM »
You have to flash the convertor to 3900 minimum to get into the 1.5's. Bring up the gauge panel on PL and have a look. Go one frame at a time until the MPH moves to 1...and then go back one frame at a time till hit hits zero...then look at your RPM's.
109 235 Cubic Inch Stock Stroke Balanced Rotating Assembly
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TRW .030 Pistons
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Stock Timing Chain/Gears
212/212 Flat Tappet Cam
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6.72 at 104.67-25 PSI

I see slow people

Offline Scoobum

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Re: 60 ft blues
« Reply #100 on: September 07 2019, 09:22:02 AM »
Looking at your PL file you only flashed the convertor to 3025.
109 235 Cubic Inch Stock Stroke Balanced Rotating Assembly
Stock Crank
TRW .030 Pistons
Stock Rods
Stock Timing Chain/Gears
212/212 Flat Tappet Cam
JB Racing Heads
Stock Rockers
5.7 TT Race Chip
Built 2004R
AC 16930
6262 JB

6.72 at 104.67-25 PSI

I see slow people

Offline Scoobum

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Re: 60 ft blues
« Reply #101 on: September 07 2019, 09:29:49 AM »
And your low gear fueling is in the 870's. You need to drop it to around 780. I'm gonna write an article on how to launch these cars with no money.
109 235 Cubic Inch Stock Stroke Balanced Rotating Assembly
Stock Crank
TRW .030 Pistons
Stock Rods
Stock Timing Chain/Gears
212/212 Flat Tappet Cam
JB Racing Heads
Stock Rockers
5.7 TT Race Chip
Built 2004R
AC 16930
6262 JB

6.72 at 104.67-25 PSI

I see slow people

Offline Tim Hensley

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Re: 60 ft blues
« Reply #102 on: September 07 2019, 01:49:06 PM »
Thanks for taking the time to look at the logs.
Itís definitely rich at takeoff,Alky is spraying like mad.
I have a log with Alky off it was low 800 same 3000 rpm
Do you have any theory  why RPMs do flat just before the 1-2 shift?
Been down the last two track sessions going next week,setting takeoff boost to 15 lb and try to hold 3100
Looking forward to your article
Arizona GN109 forged rotating assembly
DLS 210-210
Champion irons
Extreme Auto stage II trans and converter

Offline Scoobum

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Re: 60 ft blues
« Reply #103 on: September 07 2019, 02:35:43 PM »

Julio has his default alky start spraying at 6 psi and you left at 11 psi. Alky is a fuel...so it's prolly bogging the engine down at takeoff. These engines rolled off the assembly line running 14 psi with straight pump gas. Julio has an adjustment for the turn on point...and also for volume. When I ran my SMC kit I had it coming on at 12 PSI...dependin g on how accurate the knob was.


What turbo are you running...what size exhaust housing...and journal or BB? What convertor is in it...and what's the stall rated at. We'll start with that.
109 235 Cubic Inch Stock Stroke Balanced Rotating Assembly
Stock Crank
TRW .030 Pistons
Stock Rods
Stock Timing Chain/Gears
212/212 Flat Tappet Cam
JB Racing Heads
Stock Rockers
5.7 TT Race Chip
Built 2004R
AC 16930
6262 JB

6.72 at 104.67-25 PSI

I see slow people

Offline Tim Hensley

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Re: 60 ft blues
« Reply #104 on: September 07 2019, 07:25:49 PM »
1 5857 .63 af precision ballbearing
2 Lonnie at Extreme Automaticsís,converter rated 2800 I think it a little higher none locking

Arizona GN109 forged rotating assembly
DLS 210-210
Champion irons
Extreme Auto stage II trans and converter