turbo 4.3 sonoma project.
Nov 30, 2009 | 12:51 AM
#121
Dec 3, 2009 | 07:28 PM
#125
Thread Starter
single digit dreamer
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Joined: Mar 2002
Posts: 9,743
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From: omaha ne
here is a video i put together. nothing special, just a few runs on the dyno. http://neufamily.org/images/bobs%20f...ma%20video.wmv
got some pics of the underside of the truck while up on a lift >> http://neufamily.org/images/03GMCgallery/index_2.htm
got some pics of the underside of the truck while up on a lift >> http://neufamily.org/images/03GMCgallery/index_2.htm
Btw, if you wrap the exhaust with hearder wrap from manifold to turbo, you will be amazed at how much better it will spool on the street. 
Dec 5, 2009 | 07:38 AM
#130
thanks Tom at C&S. he got this thing dialed in quickly.
got some numbers and some video, video will have to wait till tomorrow. numbers seem great to me.
the truck was baselined at 180rwhp. not sure of the tq. we lost the baseline runs. mustang dyno, unlocked, 3rd gear.
i have 3 sets of numbers
unlocked tuned to 22deg timing and 8.5psi max, mid 11's a/f. 304rwhp/379rwtq
then locked and tuned to the same numbers as above 315rwhp/434rwtq
last numbers are from an early attempt to run a higher spring. only made one run since it was clear we were going to be very close to running out of fuel. injectors were at 100%. a/f in the high 10's, timing around 18deg, boost at 11.5psi. 334rwhp/400rwtq unlocked. based on what we were seeing pulling fuel and adding timing at the lower boost level i would say there is an easy 15hp on top of that once tuned but we didn't want to have it on the edge of being out of fuel.
seems like great numbers for only 8.5psi, this seems like a very safe setting. there is a ton more in it when/if the owner wants more down the road. a cam would do wonders. right now just some injectors and we could turn it up to 350rwhp. put a cam in there or some race gas and lots more boost and 400+rwhp seems likely. turbo is conservatively rated at 585fwhp.
here is a chart showing the 8.5psi unlocked vs locked.
got some numbers and some video, video will have to wait till tomorrow. numbers seem great to me.
the truck was baselined at 180rwhp. not sure of the tq. we lost the baseline runs. mustang dyno, unlocked, 3rd gear.
i have 3 sets of numbers
unlocked tuned to 22deg timing and 8.5psi max, mid 11's a/f. 304rwhp/379rwtq
then locked and tuned to the same numbers as above 315rwhp/434rwtq
last numbers are from an early attempt to run a higher spring. only made one run since it was clear we were going to be very close to running out of fuel. injectors were at 100%. a/f in the high 10's, timing around 18deg, boost at 11.5psi. 334rwhp/400rwtq unlocked. based on what we were seeing pulling fuel and adding timing at the lower boost level i would say there is an easy 15hp on top of that once tuned but we didn't want to have it on the edge of being out of fuel.
seems like great numbers for only 8.5psi, this seems like a very safe setting. there is a ton more in it when/if the owner wants more down the road. a cam would do wonders. right now just some injectors and we could turn it up to 350rwhp. put a cam in there or some race gas and lots more boost and 400+rwhp seems likely. turbo is conservatively rated at 585fwhp.
here is a chart showing the 8.5psi unlocked vs locked.
here is a video i put together. nothing special, just a few runs on the dyno. http://neufamily.org/images/bobs%20f...ma%20video.wmv
got some pics of the underside of the truck while up on a lift >> http://neufamily.org/images/03GMCgallery/index_2.htm
got some pics of the underside of the truck while up on a lift >> http://neufamily.org/images/03GMCgallery/index_2.htm
All that plumbing looks outta place under that truck. Gotta love the Midwest.
As cttandy said, if you weren't told it had a turbo on it, you would never know. A quiet truck is preferred choice.
Nice work on building a V6 ; changes it up a bit.
Last edited by fastnblu; Dec 5, 2009 at 09:30 AM.