T-vis gone bad, engine damaged

JDM GT Four, ST185RC and ST205.

Re: T-vis gone bad, engine damaged

Postby 88gt4DE » Tue Aug 28, 2018 12:18 pm

Looks great.
Members don't see the above ad. Register now - it's free!
Rob
1988 ST165 - 78K - Project ---> http://www.alltrac.net/phpBB2/viewtopic.php?f=44&t=31483&start=240
2000 Toyota Tundra SR5 - 165K - Thanks 97JZA80
2003 Toyota Camry - 155K - DD - Highway Runner
2007 Toyota Rav4 - 135K - My girls DD
User avatar
88gt4DE
Established Member
 
Posts: 2688
Joined: Tue Nov 25, 2008 2:44 am
Location: New Castle , DE

Re: T-vis gone bad, engine damaged

Postby Gert » Mon Sep 03, 2018 1:15 pm

She is back:

Image
Gert
Club Member
 
Posts: 23
Joined: Tue Sep 29, 2015 8:53 am

Re: T-vis gone bad, engine damaged

Postby Gert » Mon Jan 07, 2019 2:49 pm

Car is running strong, but massive boostcreep with the CT27. My old CT26 with upgraded T04E creeped to 0.75 bar, but now she sees > 1.0 bar.
Waste gate = 0.6 bar.
Print from Autronic. Second gear. First run without boostcontroller, second with:

Image
Gert
Club Member
 
Posts: 23
Joined: Tue Sep 29, 2015 8:53 am

Re: T-vis gone bad, engine damaged

Postby RedCelicaTRD » Fri Mar 01, 2019 10:46 pm

Gert, I've been to your site quite a few times in my life. Keep up the good work!
Wayne
1990 All Trac
Grumpy Moderator
RedCelicaTRD
GTFour God
 
Posts: 3967
Joined: Sun Aug 08, 2004 6:58 pm
Location: St. George, UT

Re: T-vis gone bad, engine damaged

Postby Gert » Sat Mar 02, 2019 6:10 am

Massive boostcreep was due to an sticky wastegate. Perhaps damage with shipping, dunno.

Anyway, solving the sticky wastegate did solve the massive boostcreep, but not the "normal" boostcreep. Next week the turbo is going to be removed and the wastegate ported. It must going te be something like this, found on the world wide web with some MR2 folks:
https://www.dropbox.com/sh/n595gbzv2bhb ... WyLNIAhcqa

On the other hand, I am surprised that ATS is selling an 'super' high flowing turbo, install an 0.6 bar wastegate but do not port the wastegate??? To me, it think that should be part of the deal/package. :shrug:
Gert
Club Member
 
Posts: 23
Joined: Tue Sep 29, 2015 8:53 am

Re: T-vis gone bad, engine damaged

Postby Gert » Sat Mar 09, 2019 12:08 pm

Somebody must do it: :D

Image

Image

Image

Now I did see the difference between de stock turbine housing and the CT27 one.

If time enough, I will post some pics later.
Gert
Club Member
 
Posts: 23
Joined: Tue Sep 29, 2015 8:53 am

Re: T-vis gone bad, engine damaged

Postby underscore » Sat Mar 09, 2019 11:13 pm

Nice work! I'm curious to see how much the porting helps.
★ 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: 4197
Images: 0
Joined: Mon Apr 09, 2007 11:29 pm
Location: Kelowna, BC

Re: T-vis gone bad, engine damaged

Postby Gert » Mon Mar 11, 2019 2:15 pm

Hmm, forgot to mention: the turbo was having an sticky wastegate. First post above I see boost creep was up to about 1.1 bar at 7.500 rpm, but later on, with mapping it was much worse.
She saw 1.4 bar at 5.500 and rising! So we quit mapping and tried to solve boost problems first.

Image

So, we fixed the sticky wastegate, but that was not enough, still seeing 1.1 bar under wot.

Now, because of the bad Celica intercooler design, I installed an ERL waterinjection system, with an fail safe option. ERL is injecting from 0.7 bar, because the stock wastegate is 0.6 bar. Normally, no waterinjection required with 0.6 bar or less.
So, if I (or somebody else, wife, kids, everybody uses the GT4) are pushing with 1.0 bar and the ERL is going into error, boost is dropping to stock wastegate level. Untill now that always worked fine. But with this kind of boostcreep, the whole fail safe option is useless.

Ported the wastegate now, and hope that we can map the car soon, starting with normal boost levels.
Gert
Club Member
 
Posts: 23
Joined: Tue Sep 29, 2015 8:53 am

Re: T-vis gone bad, engine damaged

Postby GMan » Thu Apr 18, 2019 11:02 pm

Glad to see you still working on the car !
Awesome job keeping it running with the rebuilding !

(I am rarely on here, bmelket1@gmail.com :-)
GMan
Gold Member
 
Posts: 1168
Joined: Mon Aug 16, 2004 8:12 pm
Location: Boston, MA USA

Re: T-vis gone bad, engine damaged

Postby Gert » Fri May 31, 2019 5:34 am

Busy lately, not much news.

Ported the wastegate. Ported too much. Burnt a whole in the turbinehousing while boosting and let it weld by an professional welder. Hope it holds.
Anyway, the porting went so good, boost is not getting higher than 0.7 bar now. Even if I disconnect the waste gate actuator: still 0.7 bar...sigh.
Probably the wastegate is not strong enough to keep the door closed. So, more testing to do, but no time left. Not really a problem since furtheron, the car goes strong and runs really well.

Strange problem: because the oilfilter adapter plate came loose on the highway, suddenly I saw a big cloud of blue smoke behind the car and massive oil loss. Car was towed away:
Image

Luckily for me, I could switch off the engine immidiately and no further damage. No strange noises and good oil pressure. Drove about 5.000 kms since that happened.

As soon as I have time to modify the waste gate actuator I can test again. But, since I have an other project car with heating/airco problems, the Celica is second.
Image
Gert
Club Member
 
Posts: 23
Joined: Tue Sep 29, 2015 8:53 am

Previous

Return to GT Four Chat

Who is online

Users browsing this forum: No registered users and 1 guest