Roger:
My setup is a little different from what was in my 85 IROC. The 85 was the
first and somewhat odd year for the TPI. The 85 had it's own computer and
was a Mass Air Flow setup. 86-88 shared a computer and were Mass Air Flow
setup. 90-92 shared a computer and were a Manifold Absolute Pressure setup.
The MAP setups are easier and somewhat cheaper to install. Plus the air
intake plumbing is much cleaner. The MAF requires a huge MAF sensor in the
air intake before the throttle body. MAP does away with this. You probably
already know this stuff but I wanted to clarify just in case.
I set mine up like a 1990 Camaro with a 305 TPI and 700R4 tranny. It uses
all the same sensors as my 85 EXCEPT: no MAF (you add a MAP sensor now),
computers handles spark control so, no ESC sensor, different computer (use
'730 computer), eliminate the 9th injector at driver side fuel rail and
intake runners, and eliminate the cold start sensor at the front of the
intake manifold. Also, "chip" in the computer must be modified. this is
easy and a lot of people can do this. I had the VATS (vehicle anti theft
system) disabled (this lets me start the truck) and I had the EGR codes
disabled (I eliminated all the emissions stuff). My state does not requires
emissions testing for my year of truck. The computer controls the cooling
fan. I got the fan from Jeg's and I used the radiator from the 85. It
works great and looks great to. The radiator is the exact size to fit up
front and no I have no radiator sticking up above the hood latch panels.
Nice and smooth. Check my shutterfly pics for a shot of that. There is a
fuel pump relay and cooling fan relay that I mounted on the firewall below
the battery that are a part of the engine harness. I have the Check Engine
light mounted where my ignition switch used to be and the connector for
checking engine codes mounted right below the ash tray
I made a custom stainless steel gas tank for under the bed and installed the
stock fuel pump from the 85 gas tank to my gas tank. It is in the tank
itself. I used the sending unit that came with my Auto Meter gauges for the
fuel gauge.
This sounds like a lot but it isn't. Very easy to install and no special
tools required. I suggest you go to: www.chevythunder.com for a wealth of
info. This guy helped me a lot! He has harnesses and was the one to do my
"chip".
Please feel free to ask me anymore questions. If I can help, I will do my
best!
Thanks,
Jeff Engel
1956 TF
-----Original Message-----
From: Roger.Gleason@uconn.edu [mailto:Roger.Gleason@uconn.edu]
Sent: Friday, January 03, 2003 10:55 AM
To: Jeff Engel
Cc: oletrucks@autox.team.net
Subject: RE: [oletrucks] Any more advice on IFS or Rear End swaps for TF
trucks outthere?
Hey Jeff
I was wondering about the tuned port 305 with computer swap out of the
IROC. Do you have any info on the required sensors, fuel pump/ relays etc
required to do this swap. How easy is this swap. I have a 350 IROC totaled
and would like to make that swap into my 51 AD. This IROC also has the disc
brake rear end, that I think I can make work in it. I plan on installing
the bolt in front suspension unit from a 73 1/2 ton Chevy P.U. with cross
member and motor mounts.
Roger Gleason
51AD 3100 Huckster
Carl:
<<<
I know you didn't inquire about this but I thought I would add some
additional information on my drivetrain and my choices there. I had a 1985
IROC Camaro that was totaled. So, I took the Tuned Port Injected 305 and
700R4 tranny out of it and put it in my 56 TF. Computer and all. This
gives me good mileage and performance. I also used the steering column and
the front calipers. The overdrive tranny coupled with my 2.73 gears really
helps on the highway. Low RPM, high gas mileage. I had 3.70 gears but they
started to howl. So, I swapped the center section with another center
section that I had from a different project (67 Mustang GT fastback). It
drives much smoother with the 2.73's but not as snappy as the 3.70's.
Another trade off to think about.
I have some pictures of the front end, engine and truck on Shutterfly.com
if
you want to take a look.
www.shutterfly.com/osi.jsp?i=67b0de21b332b02e6500
www.shutterfly.com/osi.jsp?i=67b0de21b332b0366518
www.shutterfly.com/osi.jsp?i=67b0de21b332b033e42d
I hope this gives you some of the info you needed and if not hopefully you
weren't bored to tears!
Thanks!
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