RE: RE: R/T Big throttle body track testing (loong)

From: Bridges, Bruce (bbridges@alarismed.com)
Date: Tue Oct 06 1998 - 11:36:01 EDT


Tate,
Thanks for the info. The surge I was getting was only under WOT or 7/8 to
WOT and was a lean surge. I played with the idle setting as well but havnt
noticed any idle or low speed surging at all. Took out the JET II and all
the surging disappeared (as well as a chunk of my midrange power...)
 BKB

-----Original Message-----
From: STRICKLAND, Tate [mailto:tstricklan@shl.com]
Sent: Tuesday, October 06, 1998 5:03 AM
To: 'dakota-truck@buffnet.net'
Subject: DML: RE: R/T Big throttle body track testing (loong)

Bruce - here's the first hand info I have. I removed the steel plug
that prevents us from being able to set the idle and have tried idling
the motor up to about 1100 rpms and putting a pad under the clutch
pedal (saves carpet and reduces the length of the throw on the clutch
pedal). I was trying to do this to get my shifts to be "quicker".
 Limitation is still the shifter.

Anyway, after the second or third run, the motor started surging
BIGTIME on the way back to the pits. After racing, returned the idle
to stock - about 600 rpm's - no more surging. Left the pad there to
keep on saving the carpet. Just FYI.

Tate

I
didnt see the 14s I was hoping for, nor huge improvements from the big
TB...
BUT On the drive home, I noticed a definite surge at WOT at freeway+
speeds.
I continued driving putting about 2 more drivecycles on the truck. At
that
point I felt that I am getting to 90mph from 65 mph faster than ever,
but
after "extended" WOT at 3K + rpm I get the surge. This says to me
that Im
too lean at the top end. The R/T never surged with the stage I TB.
 Hmmm
Frank suggested removing the JET chip to see if the WOT gets better.
 Ill do
that this afternoon. Sounds like more mods are needed... New comp
mapping?
Bigger injectors? Ill keep the list posted on what those might be as
we
get further along in the development process... Any suggestions to
make the
big TB work?
BKB



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