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#1 |
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Senior Member
Join Date: Feb 2010
Posts: 965
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Put some production into the new bests on Valentine's day lol. Truck was a beast all day, 4 passes and was doing some work on 23-24psi, no nitrous.
Now the bad news is on this otherwise great good day was I under jetted a nitrous pass (didn't factor in my maxed fuel system and pressure drop for the nitrous fuel jet. 1-2nd gears were ok, but third she touch a 12.1 airfuel (24psi+50ish shot) and pushed/melted driver side gasket and some of the head. Block/Piston looks good, so I got a new stock 317 head and gasket coming this week. She'll be back soon. Enjoy the Video! 50 SHADES of Red: Hot 9 second Turbo Truck on Valentine's !! - YouTube
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12 GMC Denali HD: 4x4, 12" Bullet Proof, 24x12 American Forces, 40x15.50 Toyo M/T's, h&s mini max, deleted, 5" axle dump, S&B intake,tractions bars, air bags. 04 GMC 1500RST: TMS Iron 347/S480/4l80E - 9.63@143.22 05 GMC 2500HD: LLY@372HP/669TQ, 4x4, 8" FabTech, 4.56 gears & 37" Toyo M/T's |
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#2 |
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Senior Member
Join Date: Mar 2009
Location: Summerville, SC
Posts: 1,525
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Nice work! Did you change the jet on the last pass or not notice it previously?
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#3 |
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Senior Member
Join Date: Aug 2009
Posts: 3,774
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Nice! You should get ray to port the 317s before you put it back together.
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#4 |
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Senior Member
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Damn!! Consistent!! Time to go bracket racing!
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1999 Pontiac Firebird Trans Am: Bright Red, A4. Unicorn 1999 Pontiac Firebird Trans Am WS6: Arctic White, A4, 3.73. 243, K&N, LM1, !AIR/EGR, SLP Lid. *DEAD...for now...* 2000 Chevrolet Camaro Z28: Monterey Maroon Metallic, A4. Stockish daily driver... 1994 Dodge Intrepid : Emerald Green Metallic...217,xxx miles *DEAD* 1997 Infiniti QX4 : Sahara Beige Metallic...237,xxx miles *DEAD* |
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#5 |
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Senior Member
Join Date: Aug 2009
Posts: 3,774
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everything but the lights...
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#6 |
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Senior Member
Join Date: May 2008
Posts: 1,089
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Impressive times!!! Has to be one my favorite trucks for sure.
Your A/F ratio isnt what got your head, the timing was to high most likely. I'll look at your log and tune if you want. I hate to see you hurt it again once you get it fixed.
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1999 Z28 Camaro|Cut up 2003 CC Duramax Dually|19.5 w/245/70/19.5|5in exhaust 2009 G8 GT 408hp/402tq sae|Rotofab CAI|LS9 Cam|Headers|GXP Mufflers|Custom System 2009 Tahoe stock |
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#7 |
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Senior Member
Join Date: Feb 2010
Posts: 965
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Truck was on all boost for those passes, but I tried one nitrous pass at the end.. to keep it short it was kind of a perfect storm of shit not coming together and I should have aborted and called it a night. We honestly wanted a 9.5x pass boost only and should have just made one more attempt at it.
Thanks for the help, honestly, but I'll get her squared up. As I told Daniel, I was do for a oil change anyways. =)
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12 GMC Denali HD: 4x4, 12" Bullet Proof, 24x12 American Forces, 40x15.50 Toyo M/T's, h&s mini max, deleted, 5" axle dump, S&B intake,tractions bars, air bags. 04 GMC 1500RST: TMS Iron 347/S480/4l80E - 9.63@143.22 05 GMC 2500HD: LLY@372HP/669TQ, 4x4, 8" FabTech, 4.56 gears & 37" Toyo M/T's |
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#8 |
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Senior Member
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After reviewing everything over the first four runs and making very minimal changes, it Def was determined that the truck was perfectly tuned, perfect timing, a/f, boost, etc for its performance. The last run was a sequence of events that we should have just left it alone and let the racing gods get him that 9.5x pass on boost. That being said, it was a "shoulda, woulda, coulda" scenario. Full confidence in robs tuning and triple checking every aspect of the tune. Lesson learned and won't be made again, but the truck will be up and running strong as ever very soon.
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I wish dupree would hurry up... |
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#9 |
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Senior Member
Join Date: May 2011
Location: Summerville
Posts: 102
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Pretty sure I saw the truck being trailered on 26 west while I was going east Saturday morning thinking I wish I lived closer to the drag strip haha...
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#10 |
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Senior Member
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Yep, that was us!
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I wish dupree would hurry up... |
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#11 |
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Senior Member
Join Date: Sep 2012
Location: Columbia, SC
Posts: 2,943
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I do worse motor damage with cruise control activated, so at least you were making some awesome passes before it got hurt...lol
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"I ran out of road, talent, and ideas all at the same time."
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#12 |
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Senior Member
Join Date: Apr 2010
Location: Ladson,SC
Posts: 3,813
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outstanding!
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![]() Dark Aladdin |
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#13 |
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The Top Dog
Join Date: Dec 2007
Posts: 2,318
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Very nice!
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When the people fear the government, there is tyranny. When the government fears the people, there is liberty. Thomas Jefferson |
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#14 |
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Senior Member
Join Date: Nov 2012
Location: Greenville, SC
Posts: 314
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Like the video! And of coarse the pass...
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#15 |
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Senior Member
Join Date: Feb 2010
Posts: 965
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Thanks guys. Got every thing cleaned up, head will be here Monday. Also have another Walbro 450 coming. I was going upgrade the injectors from Bosch 127lb to the new Bosch 1650s till I seen the price.. God bless, they are proud of those little bastards. I'm going to see what these will do with more fuel pressure first.
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12 GMC Denali HD: 4x4, 12" Bullet Proof, 24x12 American Forces, 40x15.50 Toyo M/T's, h&s mini max, deleted, 5" axle dump, S&B intake,tractions bars, air bags. 04 GMC 1500RST: TMS Iron 347/S480/4l80E - 9.63@143.22 05 GMC 2500HD: LLY@372HP/669TQ, 4x4, 8" FabTech, 4.56 gears & 37" Toyo M/T's |
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#16 |
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Senior Member
Join Date: Oct 2011
Location: Goose Creek
Posts: 121
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Damn that truck moves! Nice job Rob
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2000 Silverado 4x4 **Off the beaten path**(work horse- Banks CAI, TR55's, gears, tru-trac, magnaflow & tune) 2002 Z28 **Around the corner**(bolt-ons & tune w/the creature comforts) 1991 RS **Skraight down the road** (money pit...SBC blah blah blah) |
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#17 |
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Senior Member
Join Date: Nov 2012
Location: Greenville, SC
Posts: 314
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Are the injectors on gas trucks the same as diesels when raising the fuel pressure with tuning, by just raising the pulse width?
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#18 |
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Senior Member
Join Date: Feb 2010
Posts: 965
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For me in HP tuners you have a fuel table you input injector size and flow at different kPa. There is a few other injector scaling items as well, but that's the basics.
Side note, truck is up! compression and bleed down tests are good on all holes.. She's ready to fight another day. New oem 317, swapped duals and good to go. ![]() ![]() ![]()
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12 GMC Denali HD: 4x4, 12" Bullet Proof, 24x12 American Forces, 40x15.50 Toyo M/T's, h&s mini max, deleted, 5" axle dump, S&B intake,tractions bars, air bags. 04 GMC 1500RST: TMS Iron 347/S480/4l80E - 9.63@143.22 05 GMC 2500HD: LLY@372HP/669TQ, 4x4, 8" FabTech, 4.56 gears & 37" Toyo M/T's |
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#19 |
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Senior Member
Join Date: Sep 2008
Posts: 1,158
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Seen a picture of the head. Looked like it was hit with a blow torch. You should post it.
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#20 | |
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Senior Member
Join Date: Feb 2010
Posts: 965
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Quote:
Yeah I read somewhere the exhaust gases are supposed to go out the exhaust port, you can get it to leave the head before then but it doesn't pick up power.
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12 GMC Denali HD: 4x4, 12" Bullet Proof, 24x12 American Forces, 40x15.50 Toyo M/T's, h&s mini max, deleted, 5" axle dump, S&B intake,tractions bars, air bags. 04 GMC 1500RST: TMS Iron 347/S480/4l80E - 9.63@143.22 05 GMC 2500HD: LLY@372HP/669TQ, 4x4, 8" FabTech, 4.56 gears & 37" Toyo M/T's |
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