Paul and Jason,
Ive been super busy and havnt had a chance to check the threads out until
today. Regarding your idle issues, Make sure that the double coupling or
adaptor you used to hook up the 3" Z tube to the 4"TB isnt blocking the idle
air inlet hole on the perimeter of the TB. If it is, pull the coupling back
from the hole. Air rushes in there and the squealing may be due to it
squeezing past the silicone coupling. Also, If the idle doesnt calm down
after computer learing (and adjusting the coupling away from the hole), try
adjusting the plate adjustment screw back 1/4 turn (so the plates close a
bit more). Dont adjust it so much that the plate hits the TB bore though!
Feel free to caontact me directly regarding any issues with the 4.7 TB! I
do reccomend going with the bigger inlet for maximum gains. (even a 4" dryer
hose will improve the inlet over a 3" tube) If your truck is basically
stock, your gains will be minimal at first. As you mod the truck the TB
will augment the additional mods and produce more power and torque than the
stock unit. Tests weve run on trucks with flashed PCMs and catback exhausts
showed torque increases (with the 70mm TB) over a fully ported stock 68mm
TB.
Bruce K Bridges
F&B Performance Enineered Products
----- Original Message -----
From: Jayson Woodruff <woodrufj@yahoo.com>
To: <dakota-truck-moderator@bent.twistedbits.net>
Sent: Wednesday, September 12, 2001 6:27 PM
Subject: Re: DML: 4.7 70mm TB and IAT Adjustor Installed!
>
> Check within.
>
> Paul Macey wrote:
>
> >
> >
> > Ran the truck with:
> >
> > 1) CHIP in/IAT off---seemed slightly sluggish compared to runs prior to
> > installs, not really sure if I felt any difference with the 70mm TB -vs-
> > stock 68mm TB
>
> Probably is more sluggish off the line with an unlearnd PCM. One your PCM
> gets up to date almost all the low end will come back. Try taking it to
the
> high end (5000+RPMs) you should feel a gain immediatly after install.
>
> >
> > Will have to get more experience and miles for the PCM to 're-learn' and
> > adjust (do you folks agree on this, especially the part about the PCM
> > re-learning?
>
> Yes agree on PCM, The butt dyno will feel more HP and you milage would go
up
> if you could keep your foot out of it.
>
> >
> > Ok, now the funky stuff...had to use the original coupler from the stock
> > z-tube to fit in the 4 inch end of the new coupler that came with the TB
> > in order to get (IMHO) a snug, airtight mating of the z-tube to the TB
> >
> > I can't get the z-tube to stop rubbing on the A/C lines (it wasn't with
> > the 68mm TB and using just one coupler)
>
> I recomend the new intense intake (4")
>
> >
> > The truck twice came to idle at 1k and I couldn't get it to spool down
> >
> > Squealing and/or squeaking nosies are heard at times...
> >
>
> PCM learning will take care of most the ideling and squeaking. But it
still
> freaks every once in a while. I think the squeaking is air going the idle
> control bypass hole thing.
>
> Jay W
>
>
This archive was generated by hypermail 2b29 : Fri Jun 20 2003 - 12:02:47 EDT