Steve's mildly out-of-control build

[leecheater]

Steve, glad to hear all is well. Wish I could come and watch. It would be nice to see someone else spending the money. Hope you have better luck than I did!
BTW, Sean has the 2JZ 3/4 of the way out. Working on it as I type. He amazes me in how much he can get done in 1 hour when he puts his mind to it. He told me he will have the diagnosis by the morning. I have pushed him a bit as we are out of here on Thursday night. No more hoist until we have the new garage built. My other mechanic friend told me it's going to be either a 25$ bearing or a $2500 short block.


Dan

 

[92nsx]

Maybe I should start a guessing game thread too- Kenny's was a blast to watch the reponses to! Not too sure what prize I can offer...maybe a smiley? lol

450 rwhp.

 

[emiliorescigno]

Confirmed my dyno date as June 16th at noon. I's going to DB performance in Rogers, same place as Dan's 2JZ monster got tuned at! Maybe I should start a guessing game thread too- Kenny's was a blast to watch the reponses to! Not too sure what prize I can offer...maybe a smiley? lol

397hp, then have some sort of dumb little trivial issue that stops work for the day, and then a re-schedule to finish tuning.

It's not that I don't have faith in your ability, it's just a realistic guess. :-D

 

[toyotanos]

I am already dealing with trivial issues, so Ihope I get the wringed out before long. Here's a sample!

Trivial issue #1: Uncontrollable boost! Out of the box it did 19psi, and I've only got it down to 15 so far. Wastegate cracks at 6psi right now and I get 16psi with no boost control. And yes, I'm talking to Greg about it, see if we can get it sorted. Sean tends to think it's my DDP, but after heavy porting it's becoming more of a bellmouth. If Emilio is available this weekend we could swap downpipes and see if he's right...


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Trivial issue #2: Brakes that don't let go! Both front Caliper slides were seized and the rotors were severely warped. Swapped them out for slotted rotors, freed up the slides, and installed some EBC greenstuff pads. (Not too bad for $100 shipped, I think)


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Trivial issue #3: Car dies at random, usually when going over bumps. If you bang on the AEM it will kick off and then (if you're lucky) it will re-power itself and resume operation. Pulled the ECU apart and found a metal block that looks like it is supposed to ground the 2 halves of the circuitboard together, but it was missing a bolt! Put a new bolt in and no more stalling so far!

Good news time!
Fun thing that works now- I got the 2-step hooked up and I can hit 10psi at a 3500rpm cut. Whoo that's fun! Haven't tried launching yet, though.

 

[emiliorescigno]

I might have some time this weekend to do a downpipe swap...I wouldn't be surprised if it's the DDP causing your boost control issues. I've read many threads written by people saying that their DDPs caused lots of boost creep. Would you trust your Supra to make the Journey to Stillwater?

That's certainly handy that you had the spare rotors around to deal with the brake issue too!

 

[toyotanos]

Ah, I knew the brakes were bad, I just didn't have time/motivation to fix them. More power=need brakes. There's my motivation, staying alive/keeping the Supra together.

I have no problem driving this beast anywhere! I'll have to bring a couple special tools (crow's foot wrench) but if you're available, I would be greatly appreciative! It'll be a diff. downpipe or modify the turbo's exhaust housing, and I'm thinking the housing may have a part in it too. I'll get a couple pictures to illustrate what I'm thinking.

 

[leecheater]

Hey Steve, I heard a rumor about an alleged run in with a 350Z and a silver MKIII very similar to yours. Have you heard anything?? I heard the 350 got his ass handed to him!!

 

[toyotanos]

You should hack into Sean's facebook (to get to mine) and see the vid that was taken. Kinda crappy quality, but gets the point across. I may upload it to youtube/somewhere else tonight.

 

[toyotanos]

After much work and aggressive porting, I have my boost under control! I had to chop out a section of the exhaust housing to open up flow through the wastegate but it's finally down on boost pressure. I also adjusted the wastegate arm to be a bit tighter to hold it shut better, but I am down to 14psi wastegate with a 10psi crack pressure vs 16psi at 3psi crack.! Response is good, don't know if its better than before, but at least I have control now. My tru boost now gets to be tuned for whatever boost I want to hit.
On a down note- I believe my rod bearings may have taken some damage from the excessive boost pressures/possible detonation. Dropped my oil and it came out very dark, almost black. The reason this worries me is all my bearings were dryfilm coated with a black lubricant. I have a set of acl race bearings on their way (thanks to Drew/ Mr. Yuk) and will be installing those very soon/ hopefuly before the dyno tune next week.

 

[7Matt-GE]

sounds pretty dece' Steve! keep up the good work! and also the good butt kicking

 

[Moy]

I think I've found your facebook page :biglaugh:

 

[emiliorescigno]

That's awesome that you've gotten your boost under control - your car was pulling nicely last weekend. :icon_bigg

I'll have to hook up my Tru-Boost and start tinkering as well. Where do you usually go/run into other cars like your latest victim?

 

[toyotanos]

The main spot that I've been going to is Porky's in Minneapolis. It's on University right near 280. I have a group of friends that goes there every weekend that I've been tagging along with lately. There are cars of every make and model that go there. You usually get 2-3 smokeshows, a rare dragrace, but mostly cool cars to look at and talk to. The guy in the 350 was really cool and we stayed out until 5am the next morning doing various races and cone-dodging in a parking lot with about 10 other cars. They called it the "Ghetto-plex" lol. But I've caught other cars just driving around town- that Turbo badge gets everyone's adrenaline/testosterone flowing once they see it.

Emilio- if you want/need help setting up that tru-boost just let me know, we can mount it super sly and get it tuned. I think you'll really like how much faster/harder your turbo spools with the wastegate being held closed using the SPr setting. Much fun to be had there!

And now for something completely different:
My engine is being pulled out and torn apart tonight
I need to fix an oil leak at the upper oil pump drive bushing and inspect my rod bearings, I fear they may be damaged.

 

[emiliorescigno]

I went to University a couple weekends ago, but the guys I was with didn't want to park and talk with people, it was sort of lame. Did see a good and hearty burnout out of Porky's though. :icon_bigg

I will probably be hooking up my Tru-Boost this weekend, I'm just bummed that I'll have to reach in and pull crap in order to get my vacuum lines on the wastegate actuator. Boost has been more stable holding at about 8 psi after installing the intercooler kit, before it was peaking as high as 10.5 on stock wastegate & spring.

Bummer about the engine :icon_mad: It's the first negative news in this whole thread. Hopefully things hold together well.

Also, I found a guy selling several rust-free Supra doors in Wisconsin, I'll try to check if he has any gray ones...

 

[toyotanos]

Yup, found the problem. #4 rod bearing seems to have taken a little damage. The crank is untouched thanks to the dry film lubricant, but it's getting a whole new set of rod bearings. Not sure what happened, whether it be oil starvation, knock, or other.
In other news, I added a bit of shim material to the oil pump relief spring, this brings the total to 6mm. Also found the upper bushing for the oil pump drive was very loose- it pushed out of the block with my finger. Going to see if I can get a new one by Friday. Additionally, my drivers side motor mount was broken, so that's yet another part I will try to get here before my Wednesday Dyno tuning appointment!

Pics of above said bearing!

Didn't I just have one of these pictures up here? lol

Bearings will be here Friday, and hopefully the other parts I will need!

 

[IJ.]

What were the clearences Steve?

 

[toyotanos]

Rods:
1- .0017
2- .0019
3- .0019
4- .0020 <--damaged one
5- .0015
6- .0016

Specs from Toyota are .0006-.0021 All the other rods and mains are ok, just #4 took damage. They were all at the upper range of spec, but well below the max acceptable number (forget what that was, no tsrm handy right now, also tired- 2:55am here.)
Oil maintainance so far: I ran 30wt for the first 1/2 hour, then changed to new 30wt for about 1-200 miles. After installing the oil cooling system I filled it up with 10w30 and primed it by running the oil pump drive sprocket so there was no lag in oil delivery because of that. Pressures have been good the whole time- 40psi above 2300 rpm when hot. I just changed the oil for the third time, again with 10w-30 and it came out very dark- too dark for a fresh engine, and I saw fine metallic filings in it. Knowing that my bearings were coated in a black film, I figured I had a problem so no more driving and here I am now. I will be installing a set of ACL race bearings, rather than these regular ACL's with the calico/dry film lube coating. Can't complain about the coating, I think it's what saved my crank from damage.

edit: Is it possible that revving to 6500 may have caused too much stress on the oil film?
I'm also thinking that overboosting may have contributed. My turbo did 19psi out of the box and I only had 91octane in it. I have the boost problem under control now, but it may have left its mark.

 

[IJ.]

ACL don't do M bearings in the race series

See if you can find some NDC's, I found when running my 7M hard I had to go to high 2's on the rod bearings and run a 10/60 Synthetic to get any sort of life out of the engines, having said that yours looks like it's had some gunk or crap hiding in the crank that's escaped and run through it..

Not sure if you pulled the crank plugs and wire brushed the galleries? (ditto on the block)

 

[toyotanos]

The machine shop I used did the cleanout. I tend to believe them since they had to weld onto the gallery plug (ball bearing style buried in the head) or the head to clean out the passages. If they did that to clean the head, I would suspect they would do the same for the crank and block.
That's what I thought on the Race style bearings too, but we will see if they are indeed true "race" bearings.

 

[IJ.]

Last time I built a 7M I rang ACL here and they didn't do the race series for M's, this may have changed as it was a few years back Steve.

All I can say is it looks like an FoD issue to me. I'd have expected the loose bearing to be pristine compared to the tight ones as long as it had Oil pressure.