LT1 Based Engine Tech 1993-1997 LT1/LT4 Engine Related

Dyno numbers for my heads/cam 236/242!!

Thread Tools
 
Search this Thread
 
Old 05-19-2003, 11:29 AM
  #31  
Registered User
 
LS1_03's Avatar
 
Join Date: Apr 2002
Location: Hennepin, Illinois
Posts: 695
Brian, if you would, try and let me know about a week or more in advance when you're going to the track. I'd like to call off work that day and watch and possibly race my car.
LS1_03 is offline  
Old 05-19-2003, 11:57 AM
  #32  
Registered User
 
Shon Herron's Avatar
 
Join Date: Jul 1999
Location: Six Mile, SC, USA
Posts: 2,054
Originally posted by Dan K
I would have rather not done that, but for the life of me I can't figure out why Brians and another friends cars are locking the converter at about 101-105mph, even though the program doesn't call for the TCC to engage at all at 100% TPS. If anyone knows how to fix this in the program, please let me know.
I am not sure what PCM4Less might have done so this statement is based on a stock file that is edited only thru LT1edit tables.

The WOT TC Lock Up is hard coded at 95MPH, I ran into this as well, I tried it all and after talking with Ken(LT1edit) he told me it was hard code and he removed it for me, for what it is worth, it did not make a hill of beans in the ET/MPH so no luck there. So it is a PCM hard code.

NOW, with PCM4Less, he might have went into the code and changed it to a number he figured would be good. If that is the case, it can be revised. Ken set mine in the 130+MPH range so i knew i would not hit that no matter what.

Nice numbers by the way!!
Shon Herron is offline  
Old 05-19-2003, 02:14 PM
  #33  
Registered User
 
taner's Avatar
 
Join Date: Dec 1998
Location: Windsor, Canada: Home of the FASTEST LT1 & LS1 6 spds :)
Posts: 2,407
congrats on the excellent numbers!!! i am sure you are pretty happy.

i know how much the AFR can limit a motors power, whem mine was tuned earlier this year it it was pig rich and we picked up 30 rwhp just leaning it out for the new cashaft!

now let's see some results from the track!
taner is offline  
Old 05-19-2003, 02:19 PM
  #34  
Registered User
 
Shon Herron's Avatar
 
Join Date: Jul 1999
Location: Six Mile, SC, USA
Posts: 2,054
Originally posted by taner
i know how much the AFR can limit a motors power, whem mine was tuned earlier this year it it was pig rich and we picked up 30 rwhp just leaning it out for the new cashaft!

I can vouch for AFR, i pulled 320ish on my first pull and leaned it out some and gained 20ish, and it is still rich at WOT. so I know I can pick up more with just a tad bit more dyno time.
Shon Herron is offline  
Old 05-19-2003, 06:01 PM
  #35  
Registered User
 
Dan K's Avatar
 
Join Date: Jul 2001
Location: so close I can taste it...
Posts: 1,009
Originally posted by Shon Herron
I am not sure what PCM4Less might have done so this statement is based on a stock file that is edited only thru LT1edit tables.

The WOT TC Lock Up is hard coded at 95MPH, I ran into this as well, I tried it all and after talking with Ken(LT1edit) he told me it was hard code and he removed it for me, for what it is worth, it did not make a hill of beans in the ET/MPH so no luck there. So it is a PCM hard code.

NOW, with PCM4Less, he might have went into the code and changed it to a number he figured would be good. If that is the case, it can be revised. Ken set mine in the 130+MPH range so i knew i would not hit that no matter what.

Nice numbers by the way!!
After doing some searching in the LT1 Edit archives I saw some of your posts indicating exactly this.
I would rather not have it hardcoded in the ECM to lock the converter at WOT. It just doesn't make sense when you can lock it in the tables available in Tunercat and LT1 Edit wherever you want.
If I e-mailed Ken do you think he would tell me how to correct this? I assume that I could just open the file with a hex editor and edit whatever address the computer is locking the file in?

Thanks.
Dan K is offline  
Old 05-19-2003, 06:37 PM
  #36  
Registered User
 
Tommy'Z 6speed's Avatar
 
Join Date: Jun 2001
Location: Fuquay Varina, NC USA
Posts: 96
Hey Trey,

"Where the heck is the torque curve?
according to my quick math in the good old nogin-
375 * 6500 / ~5300 is somewhere around 450-460 ft lbs
Hopefully i have the forumla (tq = hp *rpm/5280) strait"

It should be HP X 5252/RPM = TQ

That may explain the difference. (I haven't looked at the dyno curves or done the calcs myself.)
Using your example of 375 HP @ 6500 would mean 303 ft./lbs. at 6500 RPM.
Tommy'Z 6speed is offline  
Old 05-20-2003, 07:11 AM
  #37  
Registered User
 
Shon Herron's Avatar
 
Join Date: Jul 1999
Location: Six Mile, SC, USA
Posts: 2,054
Originally posted by Dan K
I would rather not have it hardcoded in the ECM to lock the converter at WOT. It just doesn't make sense when you can lock it in the tables available in Tunercat and LT1 Edit wherever you want.
If I e-mailed Ken do you think he would tell me how to correct this? I assume that I could just open the file with a hex editor and edit whatever address the computer is locking the file in?

Thanks.
Ken or Bryan might can tell you that address if you have the ability to edit the code.
You can lock it up lower than the hard coded value, but to get rid of it at 95MPH (stock code) you will have to edit the code.
I would like to know the benefits at the track of locking/unlocking it at different values. I saw no benefit, but others report gains.
Shon Herron is offline  
Related Topics
Thread
Thread Starter
Forum
Replies
Last Post
HarleyZ28
Cars For Sale
1
10-05-2015 06:23 AM
Steve69SS396
Track Kill Stories
15
08-10-2015 02:45 PM
BLK1997Z28
LT1 Based Engine Tech
13
05-07-2015 03:01 PM
racecarz28
General 1967-2002 F-Body Tech
2
03-30-2015 09:55 PM
Joe Brodman
Drag Racing Technique
5
07-24-2002 05:24 AM



Quick Reply: Dyno numbers for my heads/cam 236/242!!



All times are GMT -5. The time now is 06:12 PM.