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Discussion in 'F/I Mods & Tuning' started by hotrodt, May 16, 2012.
G man do u have to run race gas with the 70mm pully on the c38-91 blower.
Thank you Gadget. :top: Simply amazing how much torque there is at ~2k RPMs, and how flat that curve is.
I can't wait to see a new dyno with the smaller pulley!
Yea rele torspd I was looking at his tq cruve it's awesome. I'm guessing your big motor will produce some massive tq too. I can't wait to see 600+ hp from u both.
Done on dynojet - 326.16 RWHP/ 359.93 RWTQ/ 7.5 PSI WG spring
Mods- Powerfab hot tubes, gt45 y2004k turbo, URD 61lbs injectors, 3" turbo back with aeroturbine and corsa muffler, URD UCON tuned.
here are the videos.
3rd Dyno Pull done in 3rd gear..
this run made 315.65RWHP/317.73 RWTQ
4th Dyno Pull done in 4th Gear..
and finally 326.16 RWHP/ 359.93 RWTQ
From his thread >>> http://www.xr-underground.com/forum/showthread.php?t=57083
264 whp and 272 wtq
From >>> http://www.xr-underground.com/forum/showthread.php?t=56406
Neb's URD SPEC-U headers install and dyno. Post #103
Just got a set of these in the mail! Hope they live up to the hype. I like the little bit i got from the smaller pully but i was kinda expecting to feel a little more. I just want to be able to feel a difference with these. I get pissed when people say they do a mod (intake) and can feel the difference, then dyno it at 4hp. You cant feel 4hp.....
Mine should be coming soon thank god,cant wait!!
Im just worried about being able to get things apart. Im a 2013 but everything is all rusted to hell down there. Im picking up new studs and nuts just in case i snap stuff. I get neevous ever time i do a mod because half the time stuff goes wrong/ not acording to plan.
In accordance with this thread, i would like to add dyno numbers to this list some time this summer.
Do it. :top:
Just installed the spec-u headers! Took 3 buddys and myself like 6 hours to do. Had to torch some stuff as well as drill and tap some broken bolts.
Love the extra push. I feel more power from these than the supergrip pulley.
Just one problem, i wasnt clear o one of my friends during the installation process and now i have a broken clock spring
Oh that sucks man,it took me 3hrs for the full system,passenger side took me a hour by its self
Yeah living in maine sucks. Most the time was spent trying not to break stuff that was corroded. And im a 2013. When stuff did break everything slowed down.
Is your truck outside of the recall time frame for broken clock springs?
I never even bothered to look.
Planning on jumping to the 2.7" Pulley from my current 2.8" and looking for a ballpark estimate on where I will be with my setup:
AFE Stage 2 Si
URD 2.8" Pulley (currently but switching to 2.7")
Deatchswerks 255 Fuel Pump
URD Spec-U Headers
IPT Valve Body Upgrade
Have you dyno'd before?
I don't remember what the average gain is in hp from the added boost. I imagine it will be close to there though. Change your fuel filter prior to installation. Monitor your AFR's.
Do you have the FPR mod attached? If not, and you notice it being a tad to lean, then hook it up and test again.
I have not. Will try and get in after the pulley swap though.
Fuel Filter.. check. Good thing its an easy inline filter now thanks to the Deatchwerks upgrade!
The FPR.. I have played with it, didnt need it, but I will check again after the swap and keeo an eye on things.
tbh.. was hoping for more than 360..
Get that dyno done. You have to start the pull no lower than 3k rpms.