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Dodge Competition and Performance General Dodge Competition and Performance Discussion |
01-06-2008, 12:46 AM
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#1
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Name: BgBlDodge
Title: Hates hippies
Status: Not Here
Join Date: May 2007
Location: Buda, Tx
Member`s Gallery
Posts: 16,647
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Why won't my truck dyno good?
This is ridiculous. A year or so ago I dynoed 496hp with bd 155's, tst/smarty, ksb-1, stock auto. Then I put water/meth on and the DTT and did 462hp with that combo. Then I swapped in a ps62/12 and put in these 11 holers and did 451hp. By this point my injection pump was 130k miles old and had been tapped for a 100k so I figured it was weak so I replaced it. Today I get on the dyno and the truck only does 393hp. Granted I didn't use my water/meth this time but the other times I was only running washer fluid. Why won't my truck dyno good? I'm hitting full boost on the dyno so that's not the issue. Heck, smarty and injectors only I only did 353hp and the smoke cleared and I'm only hitting 1300*. I know these 11 holers aren't the best but damn I know that this truck has more power than the dyno is saying. The 1/4 mile time shows that. And that time was with no boosted launch (didn't have shafts). Yall got any ideas? I know the turbo is on the small side but it should be doing more than this. I did 393hp today with the tst on 2 and smarty on 5.
__________________
2003 Nissan 350z Touring 6mt
2000 4runner Limited
Tyler Williams
We have become educated beyond our intelligence. -Jerry Clower
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01-06-2008, 02:34 AM
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#2
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Name: rockjeep73
Title: Too Much Time
Status: Not Here
Join Date: Jul 2007
Location: California
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Posts: 1,339
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Just curious, do you always run on the same dyno? what type is it?
__________________
SHSDiesel.com
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01-06-2008, 03:56 AM
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#3
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Name: Dreambreaker
Title: Div. 3 Diesel Competitor
Status: Not Here
Join Date: Dec 2007
Location: Division 3
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Posts: 172
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They say dyno's are heart breakers! I have a friend with a 2005 Ram CTD with Dual Cp3's (BOTH ARE BIG), BIG INJECTORS, BIG RAIL, TST, SMARTY, SNOW H2O STG III, and a GREAT BIG TN CHARGER. Truck runs like a raped ape...but you won't catch that truck within 100 yards of a dyno!
I HOPE HE READS THIS AND GOES AND PROVES THE WHOLE KITTEN KABOODLE THAT HE DOES HAVE LOTS OF HP!
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01-06-2008, 04:32 AM
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#4
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Name: 94 12valve
Title: Kingpin
Status: Not Here
Join Date: Nov 2007
Location: Maryland
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Posts: 2,002
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Is your tc slipping or mabey its just not locking up.
__________________
Dave
94 Dodge RCLB home built Limited Pro Stock Puller The Green Machine
06 Dodge CR CTS2
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01-06-2008, 06:26 AM
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#5
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Name: c-hawk
Title: Liberals Suck...
Status: Not Here
Join Date: Jun 2006
Location: Eastern Shore, MD
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Posts: 670
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Quote:
Originally Posted by BgBlDodge
The 1/4 mile time shows that.
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Back when my 02 was dynoing at 408hp it was running 96mph in the 1/4mile. I think the dyno is telling you the truth, but I don't know why you aren't making more power then that with the upgrades you have. You definitely seem to have a problem somewhere.
__________________
2001 Dodge 2500 4x4 - SBC OFE, Mach 1.2, Smarty...
www.TNT-Power.com
Last edited by c-hawk; 01-06-2008 at 06:30 AM.
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01-06-2008, 08:35 AM
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#6
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Name: cummins724
Title: BREAKING $HIT
Status: Not Here
Join Date: Apr 2007
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Posts: 8,568
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I'd say that you need to clean the map/iat sensors & have your box checked out. What fuel system are you running? Sounds like the box is getting weak, but those Dragons are monsters, you could be choking the engine. I had Dragon Flys, Holley Blue, a HTB2 62/12 turbo & Edge comp...dynoed 476hp/936lbft.
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CPP DIESEL
Edge-PPE-EFI LIVE-H&S-II-Airdog-Fass-Smarty-ARP-AFE-Autometer-Isspro-MBRP-DDP-South Bend Clutch-Valair-CUSTOM INJECTORS-DIY BUMPERS
www.CPPDIESEL.com
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01-06-2008, 09:05 AM
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#7
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Name: Snedge
Title: Comp Diesel Sponsor
Status: Not Here
Join Date: Sep 2006
Location: Western Pa.
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Posts: 18,832
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You must be bummin' man. Sorry for your luck. What differences have you yourself noticed with the upgrades? Does the truck seem to run better? Have your 1/4 mile times changed?
What are you using for fuel delivery? I didn't see anything in your sig.
I hope your not trying to swing that hammer with a toothpick!!!
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01-06-2008, 09:06 AM
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#8
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Name: Sledpuller
Title: Comp Diesel Sponsor
Status: Not Here
Join Date: Apr 2006
Location: Pennsylvania
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Posts: 8,160
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Wiseman say: " Dyno always read low, it never read high."
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01-06-2008, 09:45 AM
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#9
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Name: zstroken
Title: For $$$ your name here
Status: Not Here
Join Date: Sep 2006
Location: Western Michigan(by the lake)
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Posts: 23,151
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Trucks that perform well on the track don't always perform well on the dyno. I personally feel that your truck better be dead on for tuning, not too much fuel, injected at the right time etc etc. I don't think my truck would dyno well, as I had so much fuel at the bottom and a big charger. Once on the track the sled loads it enough that those are as critical. Remember most dyno's are a measurement of how fast your engine can accelerate a certain load.
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01-06-2008, 10:27 AM
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#10
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Name: TheBigNasty
Title: Project bish
Status: Not Here
Join Date: May 2007
Location: Magnolia, TX
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Posts: 5,385
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__________________
Brandon
2012 Ford F250 King Ranch
2004 Dodge 2500 Sport
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01-06-2008, 11:06 AM
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#11
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Name: Scooter's Roofing
Title: Too Much Time
Status: Not Here
Join Date: Oct 2006
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Posts: 17,007
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truck probably doesn't dyno well because it's not making any power... you should buy my PDR Street Twins
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01-06-2008, 12:14 PM
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#12
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Name: BgBlDodge
Title: Hates hippies
Status: Not Here
Join Date: May 2007
Location: Buda, Tx
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Posts: 16,647
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The truck runs like a raped ape on the street. Converter is locking and isn't slipping. Fuel pressure is rock solid at 13psi with everything turned up. I haven't been back to the 1/4 since I installed billet but my track times dropped 1.5sec when I swapped in the ps62/12 and the 200's so I know that it's definately making more power. I just wanna know why every time I dyno it keeps going lower and lower.
Forrest, if I had the money for the twins I'd buy them in a heart beat.
__________________
2003 Nissan 350z Touring 6mt
2000 4runner Limited
Tyler Williams
We have become educated beyond our intelligence. -Jerry Clower
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01-06-2008, 01:58 PM
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#13
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Name: Ph4tty
Title: I'm nobody
Status: Not Here
Join Date: Jun 2007
Location: Va
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Posts: 1,090
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As you know Tyler I too am plagued with Big Blue Syndrome. I've pulled my iats and map sensors for cleaning and swapped from the 64 to a super 62 since my last run. I'll let you know how it turns out. The sensors were pretty oily, but a little brake clean and they looked good as new
__________________
David
02 Dodge dually- mach 4's, 62/71/14, smarty, tst comp, F1 cam/springs and lift pump, South Bend 3250 diaphragm dual disk 12cb
542/1040 uncorrected 1/12/08
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01-06-2008, 02:16 PM
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#14
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Name: haloman
Title: Too Much Time
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Join Date: Aug 2007
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Posts: 7,876
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You better cover your mouth when you sneeze I dont want BBS becoming airborne.
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01-06-2008, 03:37 PM
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#15
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Name: Mountaineer
Title: Comp D's Doe Killer
Status: Not Here
Join Date: Apr 2007
Location: West Virginia CSA
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Posts: 699
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Maybe you should get one of those... Hx-35's and some jammer nozzles with a edge ez . I think that combo will put out more power.
J/k
__________________
Y2K Ram Ctd 4X4 ISB Auto
"Those who hammer their guns into plows
will plow for those who do not."
~ Thomas Jefferson ~
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01-06-2008, 04:31 PM
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#16
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Name: BgBlDodge
Title: Hates hippies
Status: Not Here
Join Date: May 2007
Location: Buda, Tx
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Posts: 16,647
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I think your right. I pulled my map sensor a couple of weeks ago and it was fine but I hit it with some brake cleaner anyways. Haven't pulled the IAT sensor yet but I have a feeling that it's gonna be the same way.
__________________
2003 Nissan 350z Touring 6mt
2000 4runner Limited
Tyler Williams
We have become educated beyond our intelligence. -Jerry Clower
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01-06-2008, 04:38 PM
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#17
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Name: Dockboy
Title: Comps BFF
Status: Not Here
Join Date: Apr 2006
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Posts: 3,341
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Quote:
Originally Posted by BgBlDodge
The 1/4 mile time shows that.
I did 393hp today with the tst on 2 and smarty on 5.
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6800 lbs at 96 mph is 400 hp.
The dyno is right on.....
You couldn't be comparing numbers from the same dyno and the same CF.
__________________
Greg
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01-06-2008, 04:43 PM
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#18
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Name: Scooter's Roofing
Title: Too Much Time
Status: Not Here
Join Date: Oct 2006
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Posts: 17,007
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I think your first dyno was on a daydreamer... the rest have been heartbreakers
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01-06-2008, 04:46 PM
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#19
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Name: BgBlDodge
Title: Hates hippies
Status: Not Here
Join Date: May 2007
Location: Buda, Tx
Member`s Gallery
Posts: 16,647
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More like 7800lbs on 35" tires running 96mph.
All dynos have been dynojets.
__________________
2003 Nissan 350z Touring 6mt
2000 4runner Limited
Tyler Williams
We have become educated beyond our intelligence. -Jerry Clower
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01-06-2008, 04:56 PM
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#20
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Name: B.A.Ram
Title: A Big Deal
Status: Not Here
Join Date: Jul 2007
Location: Dallas Area
Member`s Gallery
Posts: 2,598
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Damn Tyler, I normally give you a hard time but I actually feel sorry for ya on this one...
__________________
2015 Superwhoopty
2016 Lexus G-Ride
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