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-   Racing and high performance (trucks haulin more than hay) (https://67-72chevytrucks.com/vboard/forumdisplay.php?f=60)
-   -   496 to be DYNO'D! (https://67-72chevytrucks.com/vboard/showthread.php?t=510926)

bustedknuckles 03-19-2012 09:48 PM
Re: 496 to be DYNO'D!
 
tire fryer for sure.

Vortecpro 03-19-2012 10:13 PM
Re: 496 to be DYNO'D!
 
Quote:
Originally Posted by GMR-PERFORMANCE (Post 5261178)
I dyno here but it is a rear wheel dyno for harleys. I have a question on the AFR that is showing on the sheet. Is there a reason that its running so rich?? Or was that where they set it as it made the most power there, or ran cooler, Most will run in the 13.0 range to 13.5 and run cool to make the best power.. Not stirring the pot only asking. To me that seems too rich.
It was rich, ever here the saying "leavin a little in the bank"?

69GMC910 03-19-2012 10:27 PM
Re: 496 to be DYNO'D!
 
I forgot about the virtual high five! I scrolled through the posts, and shawnt was closest! Good guess man! You must spend some time on the T.C. board...! lol!

Super73 03-20-2012 12:06 AM
Re: 496 to be DYNO'D!
 
Steve, Interesting you tune them that lean. For all the LS stuff I tune, I tend to set it about 12.8-12.9.. So to me, based on my time spent on the dyno with a bunch of LS stuff, the tune looks pretty good, the top end of the rom range might be a little rich, but not bad.. All depends on what the combo wants right?

GMR-PERFORMANCE 03-22-2012 10:47 AM
Re: 496 to be DYNO'D!
 
Quote:
Originally Posted by Vortecpro (Post 5262598)
It was rich, ever here the saying "leavin a little in the bank"?
Yes I have, and we do.. LOL again just asking. I have been doing this stuff for twenty years now, we have a very good handle on it. But only looking at afr is just the starting point a 4 gas will tell you much more. Opens up many more doors for tuning. We have to be careful not to run them too rich as you will end up building carbon and that in the long run will led to other issues as we all know.

My Stroker LS ran the best at 13.2 under that the power fell off by a large amount. I could have run it leaner and it was making more power ( we did try several ranges,.. but in the dunes the heat from the leaner afr would ramp up my coolant temp. Different beast of course.. And yes what the engine wants is how it should be tuned, there is no "written in stone" afr range .

shawnt 03-23-2012 07:35 AM
Re: 496 to be DYNO'D!
 
I just have an idea on marks ability is all. Good luck with it in the truck :)
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69GMC910 03-30-2012 10:02 PM
Re: 496 to be DYNO'D!
 
2 Attachment(s)
The engine showed up on Wednesday just as I had expected. Have been under the weather lately, so haven't even uncrated it... Here's a couple pics though. Looks friggin awesome!

mud.man.rj 03-30-2012 10:27 PM
Re: 496 to be DYNO'D!
 
Lookin good, may have to post a video of it running after all the hype, should sound pretty mean.

69GMC910 03-30-2012 10:34 PM
Re: 496 to be DYNO'D!
 
Oh there will be video. You can count on that!

69GMC910 04-22-2012 09:00 PM
Re: 496 to be DYNO'D!
 
5 Attachment(s)
Photos of the 82 the 496 is going into soon...

mud.man.rj 04-22-2012 11:29 PM
Re: 496 to be DYNO'D!
 
Nice clean truck but the diff loks like a 496 may just eat it for breakfast, hehe

69GMC910 04-22-2012 11:57 PM
Re: 496 to be DYNO'D!
 
Got a 12 bolt on the way!
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Vortecpro 04-23-2012 08:33 AM
Re: 496 to be DYNO'D!
 
Quote:
Originally Posted by 69GMC910 (Post 5330094)
Photos of the 82 the 496 is going into soon...
Nice looking truck!:chevy:

mud.man.rj 04-23-2012 07:16 PM
Re: 496 to be DYNO'D!
 
Smart man on the 12 bolt at least, what trans are you running, stall also. That 496 should really rip, would like to hear it running in the truck, should be wicked. I imagine 3" exhaust for sure?:metal:

69GMC910 04-23-2012 09:07 PM
Re: 496 to be DYNO'D!
 
Tci super street fighter, ATI 3200 stall, 2" primaries with 3.5" collectors. Will be all 3" stainless exhaust. Just need some time off work to get all this stuff going on...
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mud.man.rj 04-23-2012 11:04 PM
Re: 496 to be DYNO'D!
 
Nice stall, should kick a$$ pretty nice, your right about finding time, went to work on mine tonight but ended up pulling neighbors 94GM sterring column and rebuilding it but dark now so putting it back in tomorrow then get back to my bodywork again. Bodywork is a long road.

69GMC910 04-25-2012 01:09 AM
Re: 496 to be DYNO'D!
 
1 Attachment(s)
I'll start a build thread here someday... But the story of this truck is that my Grandfather bought it new in 82.. Around 1990 it became my Grandma's truck for camping with me and my brothers. Here's a pic of it in 1997. When I bought it in 2002 it still looked like this!

hotrod 80 04-25-2012 11:07 AM
Re: 496 to be DYNO'D!
 
Quote:
Originally Posted by shawnt (Post 5241604)
Just an FYI.

On the.9.56 pass and the pass with the maroon camaro with the 468. I was there for both of those passes as we rented the track. None of this is bull****.
The 9.56 was off the trailer and the 3rd pass ever on the motor. He also pedal'd that pass because the wheelie went a little higher than he wanted.
Garrets 468 is a bad little mofo!
The red chevelle should go high 20's low 30's when ironed out.
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I was also at this test session and both of these cars , dispite chassis adjustment being off , made nice passes . Thinking the Camaro was on a 275 DR .

mud.man.rj 04-25-2012 07:49 PM
Re: 496 to be DYNO'D!
 
Wow, whole different truck in the old pictures, good job on it.

69GMC910 04-25-2012 08:07 PM
Re: 496 to be DYNO'D!
 
After seeing the OKC farm truck I kinda wish I had left it as the ALBERTA CAMPER..! Hahaha!
Posted via Mobile Device

shawnt 04-28-2012 02:00 AM
Re: 496 to be DYNO'D!
 
Quote:
Originally Posted by hotrod 80 (Post 5335127)
I was also at this test session and both of these cars , dispite chassis adjustment being off , made nice passes . Thinking the Camaro was on a 275 DR .
You must've seen the truck in my sig tear the driveshaft up?
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69GMC910 04-25-2013 11:59 PM
Re: 496 to be DYNO'D!
 
1 Attachment(s)
Getting close to FINALLY starting her!

Posted via Mobile Device
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mud.man.rj 04-26-2013 12:54 AM
Re: 496 to be DYNO'D!
 
That does look pretty close, getting exciting. Will be cool to hear it run.

71Dragtruck 05-06-2013 12:59 AM
Re: 496 to be DYNO'D!
 
You going to make it to the Hat this year with it?
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69GMC910 05-06-2013 01:01 AM
Re: 496 to be DYNO'D!
 
Plan is to be there at the end of june.
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