I ran pretty consistant mid 12's without the nitrous. Best run blower only was 12.51 i think, heck I can't remember the last blower only run click my sig and read page 2.

 

? I highly doubt that meth gave you anything enormous. I'd go out on the limb here and guess the extra 3 pounds of boost didn't hurt. You are saying the 5psi was at 18* right? and the 8psi was at 21*? right? We all could try and compare dyno runs to dyno runs, but we all know it is really only specifically helpful to you and your specific changes. 27hp just doesn't sound like a lot to me when you add 3#'s. What was your AFR in those particular pulls.

If you are drowning your junk daily then worry about. If you are every so often getting some meth on it, I wouldn't sweat it. At 40K mine looked great, like new actually. (unprofessional eye here of course) But I'll admit I don't throw as much meth on mine as most. If not a lot less I suppose.

I have many of time got the 4wd to turn off half way down the track and noticed NO gains from turning it off. I used to believe that, and still sorta want to believe it slows you down on the end some. Or holds you back at least, but I just can't seem to prove it.

 

Yes, 5 psi was at 18 degrees. 8 psi was at 21 degrees. 3.1 to a 2.9 pulley. I dynoed 515 on a dynojet and 545 on Synergy's Dynapack with a little bit of timing being pulled from KR.

My truck is wierd. lol I did the 90mm, gained 30rwhp, and went from a 12.51 to a 12.18.

 

You had FROST on your J-tube after a run spraying meth? never had that happen to me at any meth concentration. I would almost welcome that sign though

Don't flame my guys however I would ice down the blower all the time. I also put plastic ice cubes in the intercooler res. (the cubes are just water filled plastic squares). I would run the intercooler and my E-fans while sitting in the staging lanes with the motor off. I was able to get the starting IAT's to be about 20-25* over ambient this way. Best run I had had IAT's in the low 90's and finished in the low 120's (spraying 50/50 meth to H2O).

Totally agree. Meth wasn't worth the gains for me. I basically did it because my injectors were spent so I figured I would get 2 birds with one stone. If I had to do it over, I would have just installed my larger injectors.


SlowfiveO - See my reply on the other site...

 

WOW! That's a lot of reading! Very impressive and well documented---thanks. I bet that guy in that ZO6 was pissed!

 

Thanks for the feedback. I think Meth may be my answer mainly due to the enrichment. I'm putting a magnavolt booster on soon, but I don't think that will completely solve my problems when I get down in the mid to low 12's. I'm currently running 42lb lightning injectors. With the meth I wouldn't have to upgrade to a return line type system, etc. At least that is what I'm thinking.

Thanks for you feedback on the other site---I responded over there.

One last thing----it looks like that 90mm tb is the whip! What et/mph gains are you guys seeing?

 

I went from a 12.51 to a 12.18 with the 90mm upgrade and tuning. Didnt really notice much of a boost increase. HP went from 475 to 505 with the 90mm and tuning.

 

WOW!!! What's involved to convert? How much $$$'s? Thanks.

 

I thought the jury was still out as to whether it actually switches out of 4wd at WOT.

 

I talked to a few that can't tell, I swear... I feel it go out. Maybe I just expect it so much. I'll admit this, I broke that plunger/fork deal when I first got my truck and I would be surprised looking at how it all works that the front axel stays enagaged until you drop the horsepower or let out of it. But I swear it feels different like a second or two after the light turns to 2wd.


errr edit...what I meant to say is, looking at how it works, I agree with you, seems it would stay engaged until you let off the gas. The slip coupling would just stay in place once the plunger receded.