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 Post subject: Re: MTEG Stadium Truck
PostPosted: Fri Jun 24, 2011 1:52 am 

Joined: Tue Sep 14, 2010 8:53 am
Posts: 87
Location: Belgium
this is what you can call INTERESTING!
Nice to see this technic, really appreciate that you take the time to explain it.
I'll looking forward to see more of this 8)

Keep up the good work!


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 Post subject: Re: MTEG Stadium Truck
PostPosted: Mon Jun 27, 2011 4:53 pm 

Joined: Mon Jun 13, 2011 4:14 pm
Posts: 22
Location: SoCal
Starting to sort through the shocks – two 12” shocks and one 10” shock per corner. Rear reservoirs mount on the lower section of the shock body, opposite for the front.
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Noticed something when looking at the front shocks. The reservoir hose connects a couple inches from the top of the shock body. Some say this changes the force when the piston passes this area. Somewhat of a bypass shock type of effect, but not as extreme.
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Time to start the paint removal and repairs.


Last edited by RaceHacker on Tue Jun 28, 2011 8:57 am, edited 1 time in total.

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 Post subject: Re: MTEG Stadium Truck
PostPosted: Mon Jun 27, 2011 11:49 pm 
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Joined: Tue Mar 31, 2009 8:43 pm
Posts: 14
Location: san diego
man that truck is so awesome, their desert truck had very similar suspension design
my dad bought the single seater class 1 from PPI without an engine 20+ years ago.
its still running around somewhere in baja i was told...
good luck with the rebuild!


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 Post subject: Re: MTEG Stadium Truck
PostPosted: Tue Jun 28, 2011 8:57 am 

Joined: Mon Jun 13, 2011 4:14 pm
Posts: 22
Location: SoCal
retro-spec wrote:
man that truck is so awesome, their desert truck had very similar suspension design
my dad bought the single seater class 1 from PPI without an engine 20+ years ago.
its still running around somewhere in baja i was told...
good luck with the rebuild!


Thanks! I really like all the PPI vehicles, they were always so ahead of everyone else at the time. Can't wait to get it back running!


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 Post subject: Rear End - Magnesium Dana 60
PostPosted: Sat Jul 02, 2011 10:15 am 

Joined: Mon Jun 13, 2011 4:14 pm
Posts: 22
Location: SoCal
The rear end on the truck is very unique. It’s a “Magnesium” Dana 60 with Summer Bros Full Floater rear axles. This Dana 60 carrier I believe was released on select Ramchargers during the 70s and is used by many drag racers. Because of the magnesium center section, the axle tubes and link mounts bolt on.

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Truck also came with a few gear options :)

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 Post subject: Transmission - Doug Nash 4+1
PostPosted: Sat Jul 02, 2011 10:17 am 

Joined: Mon Jun 13, 2011 4:14 pm
Posts: 22
Location: SoCal
Transmission is a Doug Nash 4+1 with a Long Engineering under drive unit. This is also an under drive transmission with a 5th gear ratio of 1:1. There originally was a street and race version available by DNE. I'm thinking this is the straight cut gear race version, but I haven't opened up the cases to confirm. Richmond purchased the designs around 1987 and the design is still used in their 5 & 6 speeds.

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Transmission: Doug Nash DNE 4+1:
Ratios: x.xx, x.xx, x.xx, x.xx, 1.00 (still need to confirm)
Underdrive: Long Engineering (29%)

Background:

Road & Track, January 21, 2003
“After years of modifying regular production components into pieces that would withstand the rigors of 8000-rpm dump-the-clutch drag racing starts and foot-to-the-floor speed shifts, Nash got to thinking how much easier it would be to design a competition transmission from the ground up. The result is what Nash calls the 4 + 1 Quick Change 5-speed manual gearbox. It’s designed strictly for competition and features a lightweight magnesium alloy case that splits like a clamshell to facilitate gear changes and servicing, straight-cut spur gears offering higher strength and lower friction than conventional helical gears and a choice of 17 different ratios. Although the 4 + 1 Quick Change is primarily designed for straight-line competition, word of its advantages has spread to other forms of racing.”


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 Post subject: Re: MTEG Stadium Truck
PostPosted: Wed Jul 27, 2011 11:55 am 

Joined: Mon Jan 28, 2008 2:17 pm
Posts: 111
Location: so cal
depending on what 152E is in it- the early motors were not stroked, but ran 92mm bores
there are several different cams for it also....

also, the PPI Toyota stadium trucks did not run alternators (you PMed me about that)
due to the suspension set-up- I do not think you can run an alternator

where is the truck located?
did you start the engine?


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 Post subject:
PostPosted: Wed Jul 27, 2011 10:47 pm 

Joined: Mon Jun 13, 2011 4:14 pm
Posts: 22
Location: SoCal
groupb wrote:
depending on what 152E is in it- the early motors were not stroked, but ran 92mm bores
there are several different cams for it also....

also, the PPI Toyota stadium trucks did not run alternators (you PMed me about that)
due to the suspension set-up- I do not think you can run an alternator

where is the truck located?
did you start the engine?


Joel, The truck is in Upland at a friends shop...It has been sitting in storage and hasn't been started in 13+ years. I'm a little nervous to fire it up after having it sit for that long.

I took some pics of the waterpump and powersteering belt layout today. Not sure if an alternator will fit, but might be enough room in there.

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 Post subject: Re: MTEG Stadium Truck
PostPosted: Thu Jul 28, 2011 8:39 am 

Joined: Mon Jan 28, 2008 2:17 pm
Posts: 111
Location: so cal
probably not, at least with the 18R stock brackets

have the PS dropped and try to check with any 18 or 20R alternator
or any smaller alternator...

if there is anything that fits- I can set-up the drive belt and pulley to match

without PS will be undriveable
electric PS pumps are available


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 Post subject: Re: MTEG Stadium Truck
PostPosted: Fri Jul 29, 2011 2:46 pm 

Joined: Mon Jun 13, 2011 4:14 pm
Posts: 22
Location: SoCal
groupb wrote:
...if there is anything that fits- I can set-up the drive belt and pulley to match


cool, thanks! I'll see what I can make fit in there.

Do you have words of wisdom before I fire up the engine?


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 Post subject: Re: MTEG Stadium Truck
PostPosted: Fri Jul 29, 2011 6:34 pm 

Joined: Wed Jul 27, 2011 2:02 pm
Posts: 29
Location: Maui,Hawaii
Not 100% sure if this is bad but when my truck sat for over three years I used starting fluid and I drop a little oil down each spark plug tube before starting. Damn you should post a vid of it running would love to hear that thing alive!

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'80 Toyota pickup 2wd standard box 5spd,20r slammed/tucked on 15x10 all 4 corners

'09 Toyota Tacoma 4x4 4dr sport 4"+lift 16x12 with 33" Bf KO

Simple but not the norm..


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 Post subject: Re: MTEG Stadium Truck
PostPosted: Fri Jul 29, 2011 10:43 pm 

Joined: Mon Jan 28, 2008 2:17 pm
Posts: 111
Location: so cal
retro-spec wrote:
man that truck is so awesome, their desert truck had very similar suspension design
my dad bought the single seater class 1 from PPI without an engine 20+ years ago.
its still running around somewhere in baja i was told...
good luck with the rebuild!


that must have been PPI-01- the 1st built one that ran Class 1 (1 seater)
identical to PPI-002- that ran in Class 2 (2 seater)
open buggy class, I think

then 03 and racehacker's 04 are set-up similar

PPI built 14 -15 chassis for Toyota stadium / desert trucks...
one of the chassis was set-up for a Chevy engine

the early trucks had the standard cab
then everything switched to the Xtra Cabs
then serial #s turned to 001, 002

originally 152E 2.2 then 2.4 power-
then highly modified 3VZ

the suspension was super trick
the shocks when fully extended were actually on maximum compression
figure that one out !!!

Toyota paid upwards of $150K per chassis
(when spread over the whole production)

Ford and Nissan were so pissed when Toyota dumped the megabucks
built with "no budget" meaning open checkbook, not NO money
example, the pedals were all billet machined aluminum
and on and on .....


all coming back slowly now.....
:oops:


Last edited by groupb on Sat Jul 30, 2011 12:29 pm, edited 1 time in total.

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 Post subject: Re: MTEG Stadium Truck
PostPosted: Fri Jul 29, 2011 10:51 pm 

Joined: Mon Jan 28, 2008 2:17 pm
Posts: 111
Location: so cal
RaceHacker wrote:
Do you have words of wisdom before I fire up the engine?



probably safest to pull the head and pan off...
so as not to risk the valvetrain, bores, and crankjournals


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 Post subject: Rear Suspension
PostPosted: Wed Aug 03, 2011 1:07 am 

Joined: Mon Jun 13, 2011 4:14 pm
Posts: 22
Location: SoCal
groupb wrote:
the suspension was super trick
the shocks when fully extended were actually on maximum compression
figure that one out !!!

Toyota paid upwards of $150K per chassis
(when spread over the whole production)

Ford and Nissan were so pissed when Toyota dumped the megabucks
built with "no budget" meaning open checkbook, not NO money
example, the pedals were all billet machined aluminum
and on and on ....



Great Info!

Here's the compression cycle of the rear...notice how rear shocks extends on the compression stroke as groupb mentioned.

At full extension 18" with the current setup limited at 16" with straps (other setups available - cantilever arms can mount lower on frame), rear shocks are compressed.
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As the rear begins to compress, the shocks extend slightly (the larger shocks at about a 3:1 ratio, smaller shock doesn't have much working force at this point)
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Around mid travel (larger shocks about a 2:1 ratio and the smaller shock is starting to work)
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Around the last 20-25% of the travel, all three shocks are at a 1:1 ratio, effectively making the smaller (3rd shock) work similar to a bypass shock.
Image


Full compression, rear tire tucks in there nicely!
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 Post subject:
PostPosted: Wed Aug 03, 2011 1:17 am 

Joined: Mon Jun 13, 2011 4:14 pm
Posts: 22
Location: SoCal
These pics show how the cantilever arms and rollers work on the compression stroke.

At full drop...
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...and at full compression.
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 Post subject: Front Suspension
PostPosted: Thu Aug 04, 2011 7:14 pm 

Joined: Mon Jun 13, 2011 4:14 pm
Posts: 22
Location: SoCal
Here's some pics of the front shocks cycling through the suspension travel. Front shocks mount using a cross-over design.

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Needed to pull the top torsion "secondary" bars to collapse the suspension.
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Truck dropped to the ground ready to pikes peak! :)
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 Post subject: Re: MTEG Stadium Truck
PostPosted: Fri Aug 05, 2011 9:00 pm 

Joined: Tue Feb 08, 2011 1:44 am
Posts: 52
Location: Downey, CA
Daaaaaaaaaamn, i remember seeing this truck in person as a kid, and in action at the LA Coliseum!

So Awesome to see this truck's rebuild here in JNC!

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 Post subject: Re: MTEG Stadium Truck
PostPosted: Sat Aug 06, 2011 12:02 pm 
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Joined: Thu Oct 15, 2009 12:03 pm
Posts: 490
Location: oc
this has got to be one of the best posts on JNC.com

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雷 - BANG !!!


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 Post subject: Re: MTEG Stadium Truck
PostPosted: Sat Aug 06, 2011 1:05 pm 

Joined: Tue Feb 08, 2011 1:44 am
Posts: 52
Location: Downey, CA
is this the same truck im posing next to here back in 1990 at the LA Auto Show???


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_________________
***SPARKLE GARAGE***

R. Rabe Body & Paint


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 Post subject: Re: MTEG Stadium Truck
PostPosted: Sun Aug 07, 2011 5:39 pm 

Joined: Mon Jun 13, 2011 4:14 pm
Posts: 22
Location: SoCal
rrabespl wrote:
is this the same truck im posing next to here back in 1990 at the LA Auto Show???


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This photo is of the stadium truck that came after...With rule changes and shock development, the truck in the photo has a tube chassis, coil-over & position sensitive shocks and V6 power. Great pic though!


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