Re: Pro stock tech
[Re: Alan Prusiensky]
#2480219
04/09/18 10:37 PM
04/09/18 10:37 PM
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Joined: Oct 2003
Posts: 258 Cochise Co, Az, From Detroit
moetown
enthusiast
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enthusiast
Joined: Oct 2003
Posts: 258
Cochise Co, Az, From Detroit
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Vegas recap Q1 we ran the back up engine this weekend because I broke the race Motor on the Dyno last week. So we had no tune up for the motor with the manifold that we run now. We maybe had 4 cylinders misfiring all the way down the track and it showed 7.06 at 196 Q2 I made a lot of adjustment's to the fuel tune up and the engine came to live and blew the tires off. Way to much clutch. The bad part about it is still couldn't work too much on the fuel because we only went one second into the Run before I lifted. So not a lot of o2 information. Q3 we changed one of the discs in the clutch to a less aggressive disc just because the air was so bad almost 5000 feet. we only had 4 grams of counter weight. Got down ok still had some cylinders misfiring. Still had too much clutch on it but went 6.84 with some decent speed at almost 203. Q4 made more adjustments to the fuel took more clutch out. It left okay but in the meantime the racepak v-net cable disconnected and I had no shift lights and no O2's. I bounced it off the rev limiter really bad in first gear shifted hit it again and second gear realize that I didn't have any shift lights then shifted it by ear into 4th and into 5th and went 6.86 at 202. I didn't think that was that bad of a pass because of the amount of time that I was on the rev limiter. also i didn't have no O2's because of the vnet cable disconnecting so couldn't make any more adjustments to the fuel for E1. E1 the air was much better so I added 1.7 % to the fuel map for the weather change. I added a 1/4 turn of base to the clutch and 3 grams. I got put in lane 1 I never got a test hit in that lane because of the k&n challenge. We left higher on Sunday 7200 the car drove hard left. I had to lift for .3 seconds and I hit the chip in second gear and third gear. hard to watch for the shift light when you are trying to keep the car off the guardrail. Got it straight gas to the floor and still went a 6.75 at 204.7 all over the chip at the finish line. I'm pretty sure with all the things wrong with that pass it had a 6.69 in it. Not bad for the back up engine. With all the things that went wrong this weekend I'm still pretty excited to head to Houston. I was in vegas for the race. That 6:75 pass looked to me to be a 7:00 watching live with the car moving around. I could not believe the 6:75 came up on the replay monitor. It had enough steam for 6:6x for sure. I think even the track announcer mentioned how fast of a run it was considering how much the car moved around.
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Re: Pro stock tech
[Re: Alan Prusiensky]
#2480226
04/09/18 10:42 PM
04/09/18 10:42 PM
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Joined: Dec 2005
Posts: 11,579 Fulton County, PA
CMcAllister
Mr. Helpful
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Mr. Helpful
Joined: Dec 2005
Posts: 11,579
Fulton County, PA
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Thanks for the info. We watch the posted info, MPH, 60s and short times and can only assume what might be occurring. This helps connect the dots.
If the results don't match the theory, change the theory.
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Re: Pro stock tech
[Re: Alan Prusiensky]
#2480237
04/09/18 10:57 PM
04/09/18 10:57 PM
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Joined: Jan 2005
Posts: 2,540 Milwaukee WI
TRENDZ
master
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master
Joined: Jan 2005
Posts: 2,540
Milwaukee WI
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We are discussing plug gap with the coils and ecu you are using. Can you divulge the plug gap you run and dwell times?
"use it 'till it breaks, replace as needed"
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Re: Pro stock tech
[Re: TRENDZ]
#2480241
04/09/18 11:03 PM
04/09/18 11:03 PM
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Joined: Mar 2018
Posts: 104 New Jersey
Alan Prusiensky
OP
member
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OP
member
Joined: Mar 2018
Posts: 104
New Jersey
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We are discussing plug gap with the coils and ecu you are using. Can you divulge the plug gap you run and dwell times? .030 on the Gap and 5.0 on the dwell.
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Re: Pro stock tech
[Re: Alan Prusiensky]
#2480251
04/09/18 11:23 PM
04/09/18 11:23 PM
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Joined: Dec 2005
Posts: 11,579 Fulton County, PA
CMcAllister
Mr. Helpful
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Mr. Helpful
Joined: Dec 2005
Posts: 11,579
Fulton County, PA
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Rod length, compression height, rod ratio can be adjusted for a specific stroke and deck height. Are these parameters changed or adjusted for different situations or engine design, component weights, etc., or is there a set combination that has been determined to work best in these engines?
If the results don't match the theory, change the theory.
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Re: Pro stock tech
[Re: CMcAllister]
#2480257
04/09/18 11:38 PM
04/09/18 11:38 PM
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Joined: Mar 2018
Posts: 104 New Jersey
Alan Prusiensky
OP
member
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OP
member
Joined: Mar 2018
Posts: 104
New Jersey
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Rod length, compression height, rod ratio can be adjusted for a specific stroke and deck height. Are these parameters changed or adjusted for different situations or engine design, component weights, etc., or is there a set combination that has been determined to work best in these engines? 8.800 deck is pretty much standard for all the teams that I know of.
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Re: Pro stock tech
[Re: CMcAllister]
#2480268
04/09/18 11:51 PM
04/09/18 11:51 PM
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Joined: Mar 2018
Posts: 104 New Jersey
Alan Prusiensky
OP
member
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OP
member
Joined: Mar 2018
Posts: 104
New Jersey
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Is longest rod, shortest compression height that fits, a standard combination? yes are CH is under I inch and we run a 6 inch rod.
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Re: Pro stock tech
[Re: Alan Prusiensky]
#2483157
04/15/18 05:05 PM
04/15/18 05:05 PM
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Joined: Dec 2005
Posts: 11,579 Fulton County, PA
CMcAllister
Mr. Helpful
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Mr. Helpful
Joined: Dec 2005
Posts: 11,579
Fulton County, PA
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Exhaust systems. Is there much time spent testing different configurations? Is a program like Pipemax or the Burns deal used or is there enough real world experience that the header/collector are pretty much a standard deal? 2 steps/3 steps used? Typical diameters and primary lengths?
If the results don't match the theory, change the theory.
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Re: Pro stock tech
[Re: CMcAllister]
#2483312
04/15/18 09:48 PM
04/15/18 09:48 PM
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Joined: Mar 2018
Posts: 104 New Jersey
Alan Prusiensky
OP
member
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OP
member
Joined: Mar 2018
Posts: 104
New Jersey
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Exhaust systems. Is there much time spent testing different configurations? Is a program like Pipemax or the Burns deal used or is there enough real world experience that the header/collector are pretty much a standard deal? 2 steps/3 steps used? Typical diameters and primary lengths? with my budget I can't afford to work on headers. It is on my to-do list lol. We run tri y headers.
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Re: Pro stock tech
[Re: Alan Prusiensky]
#2484294
04/17/18 05:21 PM
04/17/18 05:21 PM
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Joined: Dec 2005
Posts: 11,579 Fulton County, PA
CMcAllister
Mr. Helpful
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Mr. Helpful
Joined: Dec 2005
Posts: 11,579
Fulton County, PA
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Other than the expected things; engine, input shaft, driveshaft RPM, O2s, G-force, what else is monitored with the data recorder on these cars?
If the results don't match the theory, change the theory.
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Re: Pro stock tech
[Re: CMcAllister]
#2484404
04/17/18 10:34 PM
04/17/18 10:34 PM
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Joined: Mar 2018
Posts: 104 New Jersey
Alan Prusiensky
OP
member
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OP
member
Joined: Mar 2018
Posts: 104
New Jersey
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Other than the expected things; engine, input shaft, driveshaft RPM, O2s, G-force, what else is monitored with the data recorder on these cars? engine vacuum, 3 ride height sensors, fuel flow, 4 shock sensors,wheelie bar load sensor, and tps. I'm sure I'm forgetting a couple.
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Re: Pro stock tech
[Re: Alan Prusiensky]
#2484426
04/17/18 11:27 PM
04/17/18 11:27 PM
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Joined: Dec 2005
Posts: 11,579 Fulton County, PA
CMcAllister
Mr. Helpful
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Mr. Helpful
Joined: Dec 2005
Posts: 11,579
Fulton County, PA
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Other than the expected things; engine, input shaft, driveshaft RPM, O2s, G-force, what else is monitored with the data recorder on these cars? engine vacuum, 3 ride height sensors, fuel flow, 4 shock sensors,wheelie bar load sensor, and tps. I'm sure I'm forgetting a couple. Which are "nice to know" information and which are "can't do without"? Or is all of it important to tuning during to course of an event?
If the results don't match the theory, change the theory.
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Re: Pro stock tech
[Re: dthemi]
#2484445
04/18/18 12:09 AM
04/18/18 12:09 AM
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Joined: Mar 2018
Posts: 104 New Jersey
Alan Prusiensky
OP
member
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OP
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Joined: Mar 2018
Posts: 104
New Jersey
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For what it's worth I'm often around WJ and Kurt
I asked him recently who to vote for in the K+N deal, and he said without provocation, you. He was very complimentary of your effort as a racer, and as a person. Anybody that's around Wj much knows his compliments are rare, and served in small doses lol.
it's pretty cool that he even knows my name.
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Re: Pro stock tech
[Re: CMcAllister]
#2484448
04/18/18 12:13 AM
04/18/18 12:13 AM
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Joined: Mar 2018
Posts: 104 New Jersey
Alan Prusiensky
OP
member
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OP
member
Joined: Mar 2018
Posts: 104
New Jersey
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Other than the expected things; engine, input shaft, driveshaft RPM, O2s, G-force, what else is monitored with the data recorder on these cars? engine vacuum, 3 ride height sensors, fuel flow, 4 shock sensors,wheelie bar load sensor, and tps. I'm sure I'm forgetting a couple. Which are "nice to know" information and which are "can't do without"? Or is all of it important to tuning during to course of an event? every sensor is important but as a engine builder I usually look at the vacuum first after a run. It gives me a look at how good the motor is sealed up.
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Re: Pro stock tech
[Re: Alan Prusiensky]
#2484486
04/18/18 03:53 AM
04/18/18 03:53 AM
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Joined: Aug 2011
Posts: 2,861 Pattison Texas
CSK
master
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master
Joined: Aug 2011
Posts: 2,861
Pattison Texas
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Thank you Alan, & Welcome to my home town Houston, good luck !!!!
1968 Charger COLD A/C Hilborn EFI 512ci 9.7 compression, Stealth heads, 4.10 gear A518 ODtrans 4100lb,10.93 full street car trim 2020 T/A 392 Stock 11.79 @ 114.5
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