LT1 Throttle Body: Differences between (92-93) and (94-96)
#1
Le Mans Master
Thread Starter
LT1 Throttle Body: Differences between (92-93) and (94-96)
Holley lists different throttle bodies for the early LT1 (92-93)
and subsequent years (94-96). They also differentiate between
the models by stating the early version includes Corvette (along
w/ F-bodies) but omit Corvette for the late version.
Can anyone tell me about the difference between these versions.
Pictures would get you bonus points.
** --- Corvette & F-Body Versions (92-93) --- **
112-504 Holley Twin 52mm throttle body
112-505 Holley Twin 58mm throttle body
** --- F-Body Versions (94-97) --- **
112-508 Holley Twin 52mm throttle body
112-509 Holley Twin 58mm throttle body
.
and subsequent years (94-96). They also differentiate between
the models by stating the early version includes Corvette (along
w/ F-bodies) but omit Corvette for the late version.
Can anyone tell me about the difference between these versions.
Pictures would get you bonus points.
** --- Corvette & F-Body Versions (92-93) --- **
112-504 Holley Twin 52mm throttle body
112-505 Holley Twin 58mm throttle body
** --- F-Body Versions (94-97) --- **
112-508 Holley Twin 52mm throttle body
112-509 Holley Twin 58mm throttle body
.
#2
Melting Slicks
Sent you an email. The main difference is in the linkage style. Match the throttle body to the year ECM you have. I have a picture of all the different styles I can send you.
Ken
Ken
#3
Melting Slicks
If your having trouble with your original one or you want to enlarge it to 52mm. ......I would just send it to David Koldos for a rebuild/enlargement. Do a search on here with his name...he comes highly regarded. He installs roller bearings as well (instead of bushing) for longevity. He did my 89/91 style throttle body.
#4
Le Mans Master
Thread Starter
Thanks for the email, reply sent.
Is the linkage difference due to the change from the 4L60
(w/ TV cable) to the 4L60-E (w/o TV cable) transmission?
Am I right in assuming that the matter of the TPS voltage
differences could be addressed by switching TPS sensors,
or are the castings different - making TPS units
non-interchangeable.
The reason for the question is to determine which LT1 TB's
are appropriate for a Holley Stealth Ram on a pre-LT1
C4. Unless David K. offers LT1 TB's without requiring a core,
people going this route need to pick up used ones or go to the
aftermarket choices.
.
Is the linkage difference due to the change from the 4L60
(w/ TV cable) to the 4L60-E (w/o TV cable) transmission?
Am I right in assuming that the matter of the TPS voltage
differences could be addressed by switching TPS sensors,
or are the castings different - making TPS units
non-interchangeable.
The reason for the question is to determine which LT1 TB's
are appropriate for a Holley Stealth Ram on a pre-LT1
C4. Unless David K. offers LT1 TB's without requiring a core,
people going this route need to pick up used ones or go to the
aftermarket choices.
.
#5
Melting Slicks
Why do you have to use a LT1 throttle body on the HSR. If this setup is going on your 89 Corvette why can't you use this 89/91 style TB. Hope you're using a high rise hood cause it won't fit under the stock one.
#6
Melting Slicks
Go to www.stealthram.com (they say you do not have to use the LT1 throttlebody). Check out the message board as others comment on using the early style throttle body without any difficulties. The only interference seems to be at the fuel rail corner/TB linkage. This can easily be resolved according to the guys post. Also in the FAQ section it states you can use the early style. Hope this helps!
Ken
Ken
Last edited by KENS80V; 01-16-2006 at 06:38 PM. Reason: Additional info.
#7
Safety Car
Originally Posted by Slalom4me
Thanks for the email, reply sent.
Is the linkage difference due to the change from the 4L60
(w/ TV cable) to the 4L60-E (w/o TV cable) transmission?
Is the linkage difference due to the change from the 4L60
(w/ TV cable) to the 4L60-E (w/o TV cable) transmission?
Originally Posted by Slalom4me
Am I right in assuming that the matter of the TPS voltage
differences could be addressed by switching TPS sensors,
or are the castings different - making TPS units
non-interchangeable.
.
differences could be addressed by switching TPS sensors,
or are the castings different - making TPS units
non-interchangeable.
.
#8
Le Mans Master
Thread Starter
Originally Posted by FD2BLK
What exactly is your problem? If it is that the min VDC for the idle position
is not high enough this can be fixed one of two ways 1. purchase an
adjustable TPS sensor with the oblonged holes or 2. oblong the holes in
the sensor you have now.
is not high enough this can be fixed one of two ways 1. purchase an
adjustable TPS sensor with the oblonged holes or 2. oblong the holes in
the sensor you have now.
remark may look out of context here.
I was looking for clairification about dependencies between the TPS
and the different ECMs I'd heard about. Your remarks and tips
answer the issue for me - if there are any, they can be overcome.
Thanks,
Ken R.
.
#9
Holley Throttle body
Does anyone have any advice on connecting the throttle body cable to the holly. The linkage to the cable does not fit the throttle body. The linkage is to small and it just falls off.