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On the Dyno today...

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Old 07-28-2008, 02:17 PM
  #111  
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It's about the same here today but the weather changes so unpredicibly I can't count on a cool afternoon. It can be 70* one day and 98* the next, ya know? I am too busy with my bike club during the summer anyway. A nice 68* fall day works for me!
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Old 07-28-2008, 04:27 PM
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Originally Posted by A Low Dime
I dunno if you've already stated this, but why arent you there at the shop?
Cause he's too busy postin!

Originally Posted by trever1t
Made something like 570/700 with the nitrous. I will need help from you guys to figure out what the problem is (trans or converter) and I know a 4L80 is next.
I tell u the prob. U are makin way too much power. Incredible!

Originally Posted by trever1t








567/754 final numbers...Look at that spike, any thoughts?
Amazing! I noticed HP remained close @ previous peak RPM, yet TQ was 200 FT.LBS. more @ 1K less RPM's.

Originally Posted by Mr. Sandog
I think you found the limits of a 4L60/65/70E.
Some time ago!

Originally Posted by Spoolin
There's your problem right there Bill...
I don't know what "well over" 900ft/lbs means but if your making 754ft/lbs at the wheel and have 20% drivetrain loss your looking at 945ft/lbs at the crank(converter) and if your seeing 25% drivetrain loss your right around 1000 ft/lbs at the crank(converter). In any case your at the limit of that converter.
That's nearing Parish territory!

Originally Posted by BlackGMC
I am curious to see what all needed to be freshened on you tranny, I know you have put some miles on it and made a lot of track passes... Seems like your the one really pushing the limits of the tranny, just wondering what all they did to it when you sent it back.
Originally Posted by trever1t
New parts including upgraded bands and hardened shafts.
What's the next tranny upgrade? I say that vac mod is all that's left. Either that or...80e.
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Old 07-28-2008, 04:35 PM
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My truck is nothing as all out as Parish's but I'll take that as a sincere comlpiment.

As I think about it, I never intended to make this much power, I just came to PT.net to get it running good Now look at what you made me do!

If this weather holds up I will be making a pass or 2 at the track in 2 weeks.
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Old 08-14-2008, 08:08 PM
  #114  
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so you are actually counting the converter flash torque spike as actual peak torque? thats not very realistic....you know that right?
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Old 08-14-2008, 08:12 PM
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Originally Posted by IMD
so you are actually counting the converter flash torque spike as actual peak torque? thats not very realistic....you know that right?
It would not be that much of a spike if the convertor was able to hold it the rest of the way. You will see there is maybe a 20ft lb spike and there is still a graph that continues only until the convertor clutch wont hold anymore.

R
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Old 08-14-2008, 08:30 PM
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it spikes for about 750rpm, then drops to 600ft lbs. am i missing something here? thats not real world, to the pavement, torque. cool for telling your friends that your truck makes 750 ft lbs though i guess.
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Old 08-14-2008, 08:39 PM
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Torque spike's are fairly common for nitrous from what I've ever seen. It would do the same on the street or track.
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Old 08-14-2008, 08:41 PM
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Originally Posted by IMD
it spikes for about 750rpm, then drops to 600ft lbs. am i missing something here? thats not real world, to the pavement, torque. cool for telling your friends that your truck makes 750 ft lbs though i guess.
His bottle was not full also. Had issues with that as well.

R
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Old 08-14-2008, 08:57 PM
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welcome back IMD...

Who the heck really cares about the dyno numbers anyway. They are only to compare gains from the mods made and used as a tool for tuning. Notice I have not changed the numbers in my sig? The track is where I measure against other trucks.
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Old 08-14-2008, 09:04 PM
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btw it is still over 500 ftlbs at near 6000 rpm
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