At the dyno!!! - The 1947 - Present Chevrolet & GMC Truck Message Board Network

jorgensensc · 10-14-2013, 12:53 PM

Here she is on the dyno at Cunningham Motor Sports! Hopefully they can get the tune working right! Can't wait for it to be done!!

smoky02 · 10-14-2013, 02:01 PM

Looking forward to hearing how she does.

Andy4639 · 10-14-2013, 05:36 PM

Cool... make sure u post the out come!

jorgensensc · 10-14-2013, 08:15 PM

Arghhhhhh!!!!! Well, did the tune. Ryne worked hard on it. I'm not too thrilled with the numbers, 300 torque and 302 horsepower at the wheels. Seems to be about a 25% loss through the drivetrain. Ryne said something about heavy drivetrain and only getting into 2nd gear because of the 3.54 rear. It has the Dana 60 rear. He reminded me that these are just numbers.
Seat of the pants says something completely different. It is very quick and feels a lot faster than that.
Now comes the really frustrating part. So as I'm driving it around before I head back on the 1 hour and 45 minute drive, I get on the freeway and go wot at around 75 mph. She goes into limp mode on me. I get it back to the shop and he pulls up the code P0606. Internal PCM performance issue. I have pulled this code before I took it to him. He says that there is some problem with the PCM. He is going to try and get another one for me and will program it for free. Just may take a few days. In the meantime, I just can't romp on it on the freeway at speed. From a standstill it seems ok. He said it will randomly happen. So I've got my scantool hooked up so that when it happens I can clear the code without stopping on the side of the road. Sucks when it goes limp in the middle of the freeway doing 70! Somebody tell me something good, please! I'm feeling pretty discouraged right now. My old big block wouldn't be giving me these problems!

Shawn

mud.man.rj · 10-14-2013, 08:25 PM

20-25% loss threw the drivetrain seems quite common, so just add the extra lost for a #, as for the other problem, who knows with modern electronic's, sure you will get it worked out, may even give you more power if the problem was substancial enough. We will be all ears when you get it straightened out. Good luck. Rick/Mudman.

jorgensensc · 10-15-2013, 11:47 AM

Thanks for the kind words. It also didn't help that the 91 octane that I just filled the tank with was bad gas. When he tried to tune it on 91 in the ECM it knocked like crazy. He had to pull timing to get it to stop. Hopefully he will be able to get an ECM for me.

**Hart_Rod** · 10-15-2013, 12:01 PM

That suxs. Hopefully he will get it straightened out.

jorgensensc · 10-15-2013, 12:48 PM

Thanks hart! I think he will. He has a good rep and seems to be a stand up guy. I just hope that my old daily driver is as important to him as all of the other amazing cars that are in there. Did I mention that he had this there also:

rcrahn · 10-15-2013, 10:48 PM

I've been reading your posts and know that you have been on a rollercoaster ride. At this point you seem to be on the right track. Working with a reputable tuner is the right move. This can and will eventually get sorted out. I appreciate how you have taken the time to post your experiences so all can learn.
Hang in there and remember - it's just a machine and there's nothing that cannot be resolved - given enough time and money. Later in life that time and money is transformed into precious gems - experience.

68GMCCustom · 10-15-2013, 11:34 PM

what are your motor specs again?

10-14-2013, 12:53 PM	#1
jorgensensc Registered User Join Date: Jul 2003 Location: Cypress, Tx Posts: 4,005	At the dyno!!! Here she is on the dyno at Cunningham Motor Sports! Hopefully they can get the tune working right! Can't wait for it to be done!! Attached Images __________________ 1972 C20 Suburban- Big Blue Betty '56 Chevy Bel Air Sedan- Frame up Restoration -What would you attempt to achieve if you knew you could not fail?- -I Refuse To Tiptoe Through Life, Only To Arrive Safely At Death's Door- R.I.P. EAST SIDE LOW LIFE

10-14-2013, 02:01 PM	#2
smoky02 Registered User Join Date: Oct 2003 Location: Sunny, Florida, some might call it South Alabama Posts: 834	Re: At the dyno!!! Looking forward to hearing how she does. __________________ Just sold my C10...sad day... Looking for a 1972 Blazer to hopefully fill the hole in my heart.

10-14-2013, 05:36 PM	#3
Andy4639 Old member Join Date: Jan 2002 Location: Liberty, & Garden City S.C. , U.S. Posts: 19,945	Re: At the dyno!!! Cool... make sure u post the out come! __________________ 1971 LWB Custom, 6.0LS & 4L80E, Speedhut.com GPS speedometer & gauges with A/C. 20" Boss 338's Grey wheels 4 wheel disc brakes. My Driver Seeing the USA in a 71 Upstate SC GM Truck Club 2013,14 and 2016 Hot Rod Pour Tour http://upstategmtrucks.com/ Get out and drive the truck this summer and have some fun! It sucks not being able to hear! LWB trucks rule, if you don't think so measure your SWB! After talking to tech support at Air Lift I have found out that the kit I need is 60811. Per the measurements I gave them. Ride height of truck inside spring and inside diameter of springs.

10-14-2013, 08:15 PM	#4
jorgensensc Registered User Join Date: Jul 2003 Location: Cypress, Tx Posts: 4,005	Re: At the dyno!!! Arghhhhhh!!!!! Well, did the tune. Ryne worked hard on it. I'm not too thrilled with the numbers, 300 torque and 302 horsepower at the wheels. Seems to be about a 25% loss through the drivetrain. Ryne said something about heavy drivetrain and only getting into 2nd gear because of the 3.54 rear. It has the Dana 60 rear. He reminded me that these are just numbers. Seat of the pants says something completely different. It is very quick and feels a lot faster than that. Now comes the really frustrating part. So as I'm driving it around before I head back on the 1 hour and 45 minute drive, I get on the freeway and go wot at around 75 mph. She goes into limp mode on me. I get it back to the shop and he pulls up the code P0606. Internal PCM performance issue. I have pulled this code before I took it to him. He says that there is some problem with the PCM. He is going to try and get another one for me and will program it for free. Just may take a few days. In the meantime, I just can't romp on it on the freeway at speed. From a standstill it seems ok. He said it will randomly happen. So I've got my scantool hooked up so that when it happens I can clear the code without stopping on the side of the road. Sucks when it goes limp in the middle of the freeway doing 70! Somebody tell me something good, please! I'm feeling pretty discouraged right now. My old big block wouldn't be giving me these problems! Shawn Attached Images __________________ 1972 C20 Suburban- Big Blue Betty '56 Chevy Bel Air Sedan- Frame up Restoration -What would you attempt to achieve if you knew you could not fail?- -I Refuse To Tiptoe Through Life, Only To Arrive Safely At Death's Door- R.I.P. EAST SIDE LOW LIFE

10-14-2013, 08:25 PM	#5
mud.man.rj Registered User Join Date: Dec 2011 Location: Creighton Sask. Canada Posts: 4,121	Re: At the dyno!!! 20-25% loss threw the drivetrain seems quite common, so just add the extra lost for a #, as for the other problem, who knows with modern electronic's, sure you will get it worked out, may even give you more power if the problem was substancial enough. We will be all ears when you get it straightened out. Good luck. Rick/Mudman. __________________ 1987 Green n Green machine. 5.0 4spd std. 7" lift w 35's.

10-15-2013, 11:47 AM	#6
jorgensensc Registered User Join Date: Jul 2003 Location: Cypress, Tx Posts: 4,005	Re: At the dyno!!! Thanks for the kind words. It also didn't help that the 91 octane that I just filled the tank with was bad gas. When he tried to tune it on 91 in the ECM it knocked like crazy. He had to pull timing to get it to stop. Hopefully he will be able to get an ECM for me. __________________ 1972 C20 Suburban- Big Blue Betty '56 Chevy Bel Air Sedan- Frame up Restoration -What would you attempt to achieve if you knew you could not fail?- -I Refuse To Tiptoe Through Life, Only To Arrive Safely At Death's Door- R.I.P. EAST SIDE LOW LIFE

10-15-2013, 12:01 PM	#7
Hart_Rod ************* Join Date: Apr 2005 Location: Pensacola, FL Posts: 17,858	Re: At the dyno!!! That suxs. Hopefully he will get it straightened out. __________________ Rob - https://www.instagram.com/hart_rod_c10 As Iron Sharpens Iron, So One Man Sharpens Another. Proverbs 27:17 FOR SALE: DBW pedal bracket - http://67-72chevytrucks.com/vboard/s...d.php?t=651123 FOR SALE: Hood Brackets http://67-72chevytrucks.com/vboard/s...d.php?t=679945 1987 Silverado SWB - 34.5K original miles http://67-72chevytrucks.com/vboard/s...d.php?t=801834 1969 SuperBurb - http://67-72chevytrucks.com/vboard/s...d.php?t=200387 1968 Farm truck - http://67-72chevytrucks.com/vboard/s...d.php?t=358692 1968 SWB - http://67-72chevytrucks.com/vboard/s...d.php?t=551258 1948 Chevy - http://67-72chevytrucks.com/vboard/s...=122164&page=3

10-15-2013, 12:48 PM	#8
jorgensensc Registered User Join Date: Jul 2003 Location: Cypress, Tx Posts: 4,005	Re: At the dyno!!! Thanks hart! I think he will. He has a good rep and seems to be a stand up guy. I just hope that my old daily driver is as important to him as all of the other amazing cars that are in there. Did I mention that he had this there also: Attached Images __________________ 1972 C20 Suburban- Big Blue Betty '56 Chevy Bel Air Sedan- Frame up Restoration -What would you attempt to achieve if you knew you could not fail?- -I Refuse To Tiptoe Through Life, Only To Arrive Safely At Death's Door- R.I.P. EAST SIDE LOW LIFE

10-15-2013, 10:48 PM	#9
rcrahn Registered User Join Date: Jun 2007 Location: The West Posts: 767	Re: At the dyno!!! I've been reading your posts and know that you have been on a rollercoaster ride. At this point you seem to be on the right track. Working with a reputable tuner is the right move. This can and will eventually get sorted out. I appreciate how you have taken the time to post your experiences so all can learn. Hang in there and remember - it's just a machine and there's nothing that cannot be resolved - given enough time and money. Later in life that time and money is transformed into precious gems - experience.

10-15-2013, 11:34 PM	#10
68GMCCustom Truck and auto performance nut Join Date: Feb 2007 Location: McKinney,Texas Posts: 3,848	Re: At the dyno!!! what are your motor specs again? __________________ Kurt - '68 GMC short step - NIB '09 LY6 6.0L crate motor w/mods, NIB '12 crate 4L85e w/billet 3k stall Circle D, 3.73 posi 12 bolt, DynaTech f-swap headers, 3/4 drop, handling mods, etc. - my toy '72 Chevy LWB C-10 Highlander - 350/350 ps/pb/tilt/ac - not original but close '06 Chevy TrailBlazerSS - LS2/4L70e - little black hot rod SUV - my DD '18 Kia Sorento - wife's econo-driver '95 Chevy S10 - reg cab shortbed, LS, 4.3, auto... my '68's powertrain and chassis build -links broken A surprise phase - carb to efi -links broken



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