Dred's Rahtid 165

Talk about your project car here

Re: Dred's Rahtid 165

Postby underscore » Sun Oct 06, 2013 2:23 pm

GT4_DRED wrote:different brands of tires (same size) front to rear


You should never run different brands F/R on an AWD car. Running different sizes of the same tire is one thing, but running different brands or even models of tire means you need to physically measure the tire to 1/16 accuracy.
Members don't see the above ad. Register now - it's free!
★ 1991 GTFour RC ~ "Rebel Scum" ★
It's for sale! http://www.alltrac.net/phpBB2/viewtopic.php?f=64&t=52181
Build thread http://www.alltrac.net/phpBB2/viewtopic.php?f=44&t=44216
underscore
GTFour God
 
Posts: 3809
Images: 0
Joined: Mon Apr 09, 2007 11:29 pm
Location: Kelowna, BC

Re: Dred's Rahtid 165

Postby MWP » Thu Oct 10, 2013 12:52 pm

GT4times2 wrote:
alltrac101 wrote:
MWP wrote:There probably wont be.
Just give it a couple of years and your AllTrac will only be FWD because the viscous center is worn out.

I wouldn't worry about it, i ran different size tires with the gram lights for years with a difference in diameter as much as 1/4", dyno, 1/4" mile, I went back & forth between the odd sized 18's & even sized 17's. I just changed it to mario's up-rated unit recently.
Most of these guys with multiple alltracs have spare tranny/transfer cases available to them anyway & are capable of doing the switch themselves.


You know it! With these cars we need spares for everything. :P I wouldn't worry about it either.


So you are going to knowingly kill a viscous center because you are too cheap/lazy to buy the correct tires?
Who knows how long Mario will keep making replacement centers availiable, and then there is the big job of changing it over.
Doesn't make much sense to me. :twisted:
My collection of GT4 documentation: http://gt4.mwp.id.au
Daily: Celica GT4 ST185 (~170kw/atw)
Project: Toyota RA28 '77 Celica (1UZ-FE powered)
Chairman of the SA Classic Celica Club.
MWP
Established Member
 
Posts: 1591
Joined: Mon Jun 01, 2009 11:02 am
Location: Adelaide, South Australia

Re: Dred's Rahtid 165

Postby alltrac101 » Thu Oct 10, 2013 4:36 pm

Dude, You need to get off your high horse & let it go.
Home of the 210 mph Standing Mile Celica AllTrac
alltrac101
Club Member
 
Posts: 428
Images: 0
Joined: Mon Aug 16, 2004 7:48 pm
Location: Palm Beach, Fl

Re: Dred's Rahtid 165

Postby MWP » Fri Oct 11, 2013 12:36 am

High horse?
Im saying it to help you guys save $$s and time.
I dont see how its even a debatable issue :bangshead:
My collection of GT4 documentation: http://gt4.mwp.id.au
Daily: Celica GT4 ST185 (~170kw/atw)
Project: Toyota RA28 '77 Celica (1UZ-FE powered)
Chairman of the SA Classic Celica Club.
MWP
Established Member
 
Posts: 1591
Joined: Mon Jun 01, 2009 11:02 am
Location: Adelaide, South Australia

Re: Dred's Rahtid 165

Postby GT4_DRED » Fri Oct 11, 2013 6:59 pm

MWP wrote:So you are going to knowingly kill a viscous center because you are too cheap/lazy to buy the correct tires?
Who knows how long Mario will keep making replacement centers availiable, and then there is the big job of changing it over.
Doesn't make much sense to me. :twisted:

Truth is, it doesn't have to make sense to you. "Cheap/lazy"? I'm gonna take the high road on this one..


MWP wrote:High horse?
Im saying it to help you guys save $$s and time.
I dont see how its even a debatable issue :bangshead:

The very fact that someone has tested and proved it out, with no ill effects, makes it debatable. Are you saying it to help, or rather to justify your own logic? Gotta be willing to accept new information so that your logic can expand. That's just one of the "sacred cows" that retards growth in the community; I'll file it next to the "17 psi max on pump gas" cow.
Image
'00 SC300 - "The long way home" daily driver
'88 ST165 - project "Rahtid"
'88 ST165 - Project "Supah Cyat"
'91 MR2
'93 Corrado SLC - "Purple Haze"
User avatar
GT4_DRED
Club Member
 
Posts: 418
Images: 0
Joined: Sun Apr 08, 2007 10:02 pm
Location: North GA.

Dred's Rahtid 165

Postby killemalltrac » Fri Oct 11, 2013 10:03 pm

Dred you make me smile hahaha!!
Image
#80sMurderCar
My build -- http://www.alltrac.net/phpBB2/viewtopic.php?f=44&t=47568
Parts for sale -- http://www.80smurdercar.com/store/c1/Featured_Products.html
User avatar
killemalltrac
Club Member
 
Posts: 321
Images: 10
Joined: Fri Dec 28, 2012 4:48 pm
Location: Oregon

Re: Dred's Rahtid 165

Postby klue » Sat Oct 12, 2013 2:33 pm

soarinhigh wrote:Dred you make me smile hahaha!!

x2
facebook.com/xiiimotorsports
#xiiimotorsports ON instagram
User avatar
klue
GTFour God
 
Posts: 3893
Joined: Thu Nov 04, 2004 9:47 pm
Location: Greater Toronto Area

Re: Dred's Rahtid 165

Postby GT4times2 » Sat Oct 12, 2013 3:13 pm

Lmbo! Well said.

Any updates and write up on the GC coil overs and solid mounts? Itching for an update.
Frantz
12 Toyota Sienna LE (The Daily Pacifier)
05 Toyota Avalon XLS
90 ST185 Gen4
88 ST165 Gen3-The works
89 ST165 Gen4-on the way
+ Many other projects, under covers....
GT4times2
Established Member
 
Posts: 2135
Joined: Mon Aug 23, 2004 3:21 pm
Location: Florida

Re: Dred's Rahtid 165

Postby MWP » Sun Oct 13, 2013 1:24 am

GT4_DRED wrote: The very fact that someone has tested and proved it out, with no ill effects, makes it debatable.


He didn't say it had no ill effects.
If he does think that, i would like to know how he tested his old VC before and after running different tires sizes for some time to prove it did have no effect.

Actually, if it had no ill effects, why would you then change the viscous unit.
Why would you do this if the original VC was still working fine? ;)

I am saying this to help, and i would love to be proven wrong (running miss-matched tyres sizes would be great).

It doesn't take much thought to work out that running different sizes causes the VC plates to always be turning against each other which does wear them out prematurely.
This is why Toyota say you shouldn't do it.

But hey, its your car, do what you like with it, but you've been warned.
My collection of GT4 documentation: http://gt4.mwp.id.au
Daily: Celica GT4 ST185 (~170kw/atw)
Project: Toyota RA28 '77 Celica (1UZ-FE powered)
Chairman of the SA Classic Celica Club.
MWP
Established Member
 
Posts: 1591
Joined: Mon Jun 01, 2009 11:02 am
Location: Adelaide, South Australia

Re: Dred's Rahtid 165

Postby BADNEWS » Tue Nov 19, 2013 4:29 am

Running tire sizes different like you are:
Front 225/40-18
Rear 235/40-18

Tension put on VC
10mph=3.8rpm
20mph=7.6rpm
30mph=11.5rpm
40mph=15.3rpm
50mph=19.2rpm
60mph=23rpm
70mph=26.8rpm
80mph=30.7rpm
90mph=34.5rpm

I know Mario had a stock VC tested and all his upgraded ones are done at 50rpm. At 50rpm the stock unit gives 130 ft/lbs or 175NM to the slower moving wheel.

For an example of what 50rpm difference is on the center diff: If you are cruising with all 4 wheels of 225/40-18 at 10mph and say you floor it. Now with some power you can break the front tires loose. If your rear tires have 100% traction at 10mph and your front spin, to achieve a 50rpm difference in the center diff your front tires will be going 13.75mph. So a difference of less than 4mph or 6.4km. And that speed difference is the same always. So if you're going 70mph, to strain the VC at 50rpm one set of tires has to be going 4mph faster or 74mph.

I personally wouldn't do the staggered tire size cause as you can see the higher the speeds the easier it is to mess up your VC. That is just my opinion with no real world testing to see if 50rpm is fast enough to get ill effects. Maybe someone else knows more about how much abuse/rpm difference a VC can take before it starts to go bad.
90 ST185 W/ HTZ4094R (6768), 2.2, Fully Built
865AWHP, 591 torque
Hope to have some 1/4 times this summer of 2016!!!
User avatar
BADNEWS
Club Member
 
Posts: 671
Joined: Sun Oct 17, 2004 5:37 pm
Location: Milwaukee, WI

Re: Dred's Rahtid 165

Postby BADNEWS » Wed Nov 20, 2013 3:09 am

Ok I did this today just to show you.

http://youtu.be/OiVXBazmlWo
90 ST185 W/ HTZ4094R (6768), 2.2, Fully Built
865AWHP, 591 torque
Hope to have some 1/4 times this summer of 2016!!!
User avatar
BADNEWS
Club Member
 
Posts: 671
Joined: Sun Oct 17, 2004 5:37 pm
Location: Milwaukee, WI

Re: Dred's Rahtid 165

Postby BADNEWS » Wed Nov 20, 2013 11:53 pm

Here is a video where I test the freeplay in the differentials and etc. Then since I can use 2 hands and have the camera (aka my cell phone lol) on the ground, I try and get the Viscous Coupling to let the rear tires move with the front tires locked into position on the ground.

http://youtu.be/Xx1f6HNlGQQ

Here is a view from the other side as I try to get the Viscous Coupling to let the rear tires move with the front tires locked into position on the ground. I was testing this for myself to make sure the rear tires were in fact moving in the SAME direction which means the VC was moving rather than the clutch discs in the rear lsd giving way and the tires would of been moving in opposite direction.

http://youtu.be/HNkWvblxk6I
90 ST185 W/ HTZ4094R (6768), 2.2, Fully Built
865AWHP, 591 torque
Hope to have some 1/4 times this summer of 2016!!!
User avatar
BADNEWS
Club Member
 
Posts: 671
Joined: Sun Oct 17, 2004 5:37 pm
Location: Milwaukee, WI

Re: Dred's Rahtid 165

Postby MWP » Tue Nov 26, 2013 4:23 am

Its good to see you trying to do tests, but i don't think trying different combinations of turning the wheels by hand is going to prove anything at all?

I guess the real test will be on the strip. Some slow motion video of a launch would be great to see!
Seeing 3 or 4 wheels spin up is what we want to see :)
My collection of GT4 documentation: http://gt4.mwp.id.au
Daily: Celica GT4 ST185 (~170kw/atw)
Project: Toyota RA28 '77 Celica (1UZ-FE powered)
Chairman of the SA Classic Celica Club.
MWP
Established Member
 
Posts: 1591
Joined: Mon Jun 01, 2009 11:02 am
Location: Adelaide, South Australia

Re: Dred's Rahtid 165

Postby BADNEWS » Tue Nov 26, 2013 3:24 pm

That is hopefully coming in summer ;)

if you go to my youtube channel you can see I made a bunch of videos test fitting 26 inch tall slicks on some 15 x 7.5 rims with a 45mm offset. I think I can make them fit with 17x8 rims with a 35mm offset. M & H makes a 26 x 8.5-17 slick I want to try and run.
90 ST185 W/ HTZ4094R (6768), 2.2, Fully Built
865AWHP, 591 torque
Hope to have some 1/4 times this summer of 2016!!!
User avatar
BADNEWS
Club Member
 
Posts: 671
Joined: Sun Oct 17, 2004 5:37 pm
Location: Milwaukee, WI

2015 Updates - Pics n videos

Postby GT4_DRED » Fri Jun 12, 2015 8:53 pm

Did some work on the car back in April, but didn't have time to post an update. After much hemming/hawing I decided to upgrade to a 6266 turbo, ramhorn manifold and downpipe to make for a more efficient setup. Also installed fr/re GT4 Racing poly bushings, Xii solid motor mounts, ST205 rear-end w/brakes, whiteline rear swaybar, homemade solid rear diff-mount, GC collars/springs, magnaflow mid-muffler, aluminum radiator, Moroso oilpan, MSD 6al-2, interior gauges and some other stuff... I've had parts sitting to do a oversquare 5sgte setup (87.5 bore/86 stroke), so I'm gonna start on that motor once time permits. It's a newer (2001) 5s block and I'll be doing a half-fill on it as well. More to come..

Project Rahtid walk around video

Burning out old bushings video

Xiii solid motor mounts video

Image

Image

Image

Image

Image

Image

Image

Image

Image

Image

Image

Image

Image

Image

Image

Image

Image

Image

Image

Image

Image


Project SupahCyat waiting to be finished up..
Image
Image
'00 SC300 - "The long way home" daily driver
'88 ST165 - project "Rahtid"
'88 ST165 - Project "Supah Cyat"
'91 MR2
'93 Corrado SLC - "Purple Haze"
User avatar
GT4_DRED
Club Member
 
Posts: 418
Images: 0
Joined: Sun Apr 08, 2007 10:02 pm
Location: North GA.

PreviousNext

Return to My Project

Who is online

Users browsing this forum: No registered users and 3 guests