Tuned Port 383 in Toyota 4WD

[Mark Romans]

Hi John:  Unless someone re-did the prom to use the larger injectors, this
would definately cause some driveability issues.  The stock injectors will
handle anything you can put through the stock intake.  Fuel econ will be
better too.  The stock intake is perfect for an rpm limited high torque app
like yours.
Mark
-----Original Message-----
From: Jon Fedock <Galadar at worldnet.att.net>
To: gmecm at efi332.eng.ohio-state.edu <gmecm at efi332.eng.ohio-state.edu>
Date: Sunday, August 01, 1999 7:21 PM
Subject: Tuned Port 383 in Toyota 4WD


>Hello Group,
>    I've been a lurker on this list (as well as DIY) for quite a while, and
>have learned LOTS from this list. I have done a few TPI transplants before,
>but my latest project has been a real learning experience. The project is a
>friend's '86 Toyota 4WD truck. Here is a rundown of what I can think of off
>the top of my head:
>    383 Chevy stroker bottom end(KB hyper. pistons, zero decked)
>    Dart Aluminum heads (sorry, don't remeber the name - same as "Iron
>Eagle" I think)
>    Stock Tuned Port (MAF) setup - mild porting but still restrictive (my
>own speculation)
>    30 lbs/hr injectors
>    Hydraulic cam - can't remember all specs, but is 227 or 228 degrees @
>.050"
>    Turbo 400 Trans
>    NP transfer case (too many differerent ones, sorry can't remember)
>    35" Tires (weigh about 100 lbs apiece with wheels)
>    4.12 Gear(s)
>    Total weight is guestimated around 3600 lbs (!)
>
>   The truck runs great (I only have a few slight driveability issues
left).
>Idles well at 600 RPM in or out of gear (the transition after a hot restart
>is giving me some fits - any help here greatly appreciated). Gets pretty
>shabby gas mileage, but it stays in PE mode alot <big grin>. You should see
>the looks on people's faces! <heh heh heh>. I have a few questions for the
>group about this vehicle. First, anyone know how to figure rotational
>horsepower losses (how much hp are the tires eating?)? I know ths is above
>my head, so just a ballpark figure here is fine with me. Second, Anyone
care
>to speculate how much hp is being lost in the intake due to restrtiction? I
>know this will not be a calculated answer, but just for grins. If anyone
has
>any questions, feel free to ask (since I learned most of what I know from
>this list) maybe I can repay something. If anyone wants a BIN, email me
>privately and I'll send it out. Comments about it are welcome! Looks like
>I've rambled on enough for now. Thanks for reading.
>Jon Fedock
>
>