FuzzyDunlops Toyota MR2 MK1.5 build thread.

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JCH13

Diamond Member
Sep 14, 2010
4,981
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I have conflicted feelings about this...

On the one hand my design and fabrication bona-fides are proven :awe:

On the other hand you broke your car's frame! :eek:

I would suggest cutting it apart if possible, and plug-welding some angle steel inside the framework to reinforce it.
 

exdeath

Lifer
Jan 29, 2004
13,679
10
81
Danger to manifold?

Pft.

Danger to chassis!

Dude stop breaking things like a baws. :awe:
 

FuzzyDunlop

Diamond Member
Jan 30, 2008
3,260
12
81
ya, IM thinking Ill hammer it back into place, weld it together and then weld some thick angle iron over top of it to really give it some beef.
Then I want to think of some kind of Anti-engine roll apparatus (another torque mount, but not a mount) that can be bolted onto the block.
 

FuzzyDunlop

Diamond Member
Jan 30, 2008
3,260
12
81
I managed to get some ugly welds in place to temporarily fix it. But I was just struggling with lack of space to do anything of quality.

I took it to a shop yesterday and we are thinking of building a piece that looks like this.
Perspective of looking up at the bottom of the car.

IMAG0408_zpsw5yvztnh.jpg~original


We're getting a good thick piece of plate steel, possibly 1/4" - 3/8". Then bolting it directly to the frame. We'll take advantage of two bolts that are further up the car that normally hold a cross brace below the gas tank. The guy making the piece also suggested to weld the front torque mount onto the plate, since the whole thing will be removable anyways. I said, "sure why not?" since that would make the most sense if we are trying to build rigidity and strength.

So, Im sorry JCH13, but we will be contaminating your perfection a little. I told the guy that his welds dont need to be as pretty as yours, just as long as they penetrate. :) He just laughed and said "yeah, I noticed those."

They are also going to beef up the rear torgue mount area as well.

I just told them to paint it with gold so that I never have to worry about it again.
Taking the car in tomorrow to get it all done.

008a0c99-30a9-48a3-878f-2941a5fd7106_zpsdc6758a5.jpg~original
 
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JCH13

Diamond Member
Sep 14, 2010
4,981
66
91
Seems like a reasonable plan to me. Just make sure they grind/sand the clear coat off so it welds nicely.
 

FuzzyDunlop

Diamond Member
Jan 30, 2008
3,260
12
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On first glance it appears they have done some real quality work.

IMAG0410_zpsjctn8w3g.jpg~original


IMAG0414_zps1ewvh8xo.jpg~original


Havent had a chance to thoroughly inspect it yet. But I had the car out last night and it felt solid.

They welded a cylinder inside of the rear cross beam so that these bolts could fit all the way through without pinching/buckling the crossbeam.
IMAG0416_zps2zotazp6.jpg~original



One last note though: Not having a Limited Slip Differential SUUUUUUUUCCKS
 
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jlee

Lifer
Sep 12, 2001
48,518
223
106
Do you notice the lack of LSD in a straight line as well, or just cornering? I've not driven a turbo MR2 without an LSD yet, but I was spinning the inside wheel (hard right hand turn) with a 5s MR2 in 3rd gear, which was definitely weird, heh.
 

FuzzyDunlop

Diamond Member
Jan 30, 2008
3,260
12
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Do you notice the lack of LSD in a straight line as well, or just cornering? I've not driven a turbo MR2 without an LSD yet, but I was spinning the inside wheel (hard right hand turn) with a 5s MR2 in 3rd gear, which was definitely weird, heh.

all the time.
Cornering feels unpredictable when its gonna break.
Straightline I can break loose when I hit boost in first or second.

Im trying to figure out what all I need to get a Kaaz or Quafe installed in one of my transmissions, but info is sparse/incorrect/varying from source to source.

The shop that I picked this tranny up from said they didnt break it open because the bearing kit alone costs $1500. But all the tranny rebuild threads I read make no mention of this 'bearing kit'. Its confusing.
 

JCH13

Diamond Member
Sep 14, 2010
4,981
66
91
you might need some more bolts through that sheet, plain sheets are not very stiff in bending, so it won't transmit loads very well to those two bolts that are relatively far away. Your original sketch had a few more holes closer to the mount, what happened to them?
 

FuzzyDunlop

Diamond Member
Jan 30, 2008
3,260
12
81
Jlee: I thought it felt like my right side wheel was always breaking loose, but I just went out and laid a patch of rubber on new pavement to see what was happening. I am indeed spinning both sides simultaneously, so it's all in my head. this FX360 clutch is great! It has a nice light load but clamps without chatter and holds even on a 5k rpm launch.

JCH: not exactly sure why they didn't put them there. Do you really think they would do that much compared to the main two in the middle?
 

jlee

Lifer
Sep 12, 2001
48,518
223
106
Jlee: I thought it felt like my right side wheel was always breaking loose, but I just went out and laid a patch of rubber on new pavement to see what was happening. I am indeed spinning both sides simultaneously, so it's all in my head. this FX360 clutch is great! It has a nice light load but clamps without chatter and holds even on a 5k rpm launch.

JCH: not exactly sure why they didn't put them there. Do you really think they would do that much compared to the main two in the middle?

Time for tires :awe:



And the cycle begins.

I have wheelspin! :(
*buy tires*
I can't spin my tires! :(
*moar power*
I have wheelspin! :(
*buy stickier tires*
I can't spin my tires! :(
*moar power*

/etc
 

JCH13

Diamond Member
Sep 14, 2010
4,981
66
91
Jlee: I thought it felt like my right side wheel was always breaking loose, but I just went out and laid a patch of rubber on new pavement to see what was happening. I am indeed spinning both sides simultaneously, so it's all in my head. this FX360 clutch is great! It has a nice light load but clamps without chatter and holds even on a 5k rpm launch.

JCH: not exactly sure why they didn't put them there. Do you really think they would do that much compared to the main two in the middle?

Simply put - yes. those two bolts turned this big plate into a great reinforcement to the frame rail because it was tied in on two sides. Just using the forward two doesn't really count as reinforcement to the frame rail, and they're so far away from the torque mount that I doubt they're contributing much to the mount's torsional rigidity or strength.

It might be fine in the long term, especially if the frame rail underneath was welded up well, but your original sketch made me much happier as a mechanical engineer.
 
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exdeath

Lifer
Jan 29, 2004
13,679
10
81
Time for tires :awe:



And the cycle begins.

I have wheelspin! :(
*buy tires*
I can't spin my tires! :(
*moar power*
I have wheelspin! :(
*buy stickier tires*
I can't spin my tires! :(
*moar power*

/etc

Ultimately ending with "it's raining, I'm stranded".
 

Black2na

Senior member
Nov 25, 2010
629
1
0
only reason i came back into the ATG was to see if the engine was back into the car. and much to my surprise i come back and find not only a broken car again but it already fixed! like Exdeath said stop breaking things like a boss!
 

FuzzyDunlop

Diamond Member
Jan 30, 2008
3,260
12
81
Ill go to the shop and see what it would take to get those two bolts put in.

And yes, I am hard on my toys.


Time for tires :awe:
And the cycle begins.

I have wheelspin! :(
*buy tires*
I can't spin my tires! :(
*moar power*
I have wheelspin! :(
*buy stickier tires*
I can't spin my tires! :(
*moar power*

/etc


Hehe, I think these are the biggest tires I can fit on my car. Unless you can find a wider, street legal, tire that doesnt have a larger diameter than these 245/45/16's RE11's... 24.5" wide max.

I plan on taking the car to a 1/4mile track on friday evening. Hoping to get into the mid 12's... if nothing breaks. Next year I may prep the car for a road track. That would be fun to get into. Ill try to collect info about it friday evening.

For refrence. Car without LSD. Blue arrows show the RE11s. The other is from 205 DZ101.
cbe90480-10a5-4664-b9e3-c96cde640896_zpsffe97dee.jpg~original
 
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FuzzyDunlop

Diamond Member
Jan 30, 2008
3,260
12
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Goddamn son!

Are you just side-stepping the clutch on launch?!

Ya, I was popping it. At the track i guess you need to let it slip more.

Live'n'learn.

I want to know what kind of axles the MK1 in Peurto Rico is using that it can do wheelies.

I may need to think about finding a way to use MK2 hubs.
 

JCH13

Diamond Member
Sep 14, 2010
4,981
66
91
Ya, I was popping it. At the track i guess you need to let it slip more.

Live'n'learn.

I want to know what kind of axles the MK1 in Peurto Rico is using that it can do wheelies.

I may need to think about finding a way to use MK2 hubs.

Methinks so too. Looks like you're snapping them right at the end of the splines, which are just too small for the power you're putting down.

Can you get a picture of the fractured bit and the rest of the axle next to each other?
 

jlee

Lifer
Sep 12, 2001
48,518
223
106
I have a pair of Mk2 turbo hubs sitting around...I could see if I could bring them up to Calgary next month if you like.
 

JCH13

Diamond Member
Sep 14, 2010
4,981
66
91
Just did a little research... the new mill in my garage should (in theory) be able to machine splines, and I know a local shop that does heat-treating. So there's the nuclear option (custom high-strength axle stubs) should it be required.
 

FuzzyDunlop

Diamond Member
Jan 30, 2008
3,260
12
81
Best image I have right now. I think they are either SW20 NA, or 90-92 Camry V6 outer CV's.

IMGP4201.jpg~original
 
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