:1zhelp: 1jz single turbo question

[91 mK3]

so here it goes, i blew my stock twins and didnt want to swap it out to another set so i decided to go single. i puller out the engine and transmission to change all seals and gaskets as well. along with this, i did a new clutch and arp head studs. the manifold im running is the driftmotion manifold and the xs power 46mm wastegate. the turbo is a masterpower t70. i bought a 3'' v-band downpipe.

i put on the manifold, turbo, and wastegate and my problems start with the v-band downpipe. i do to attatch it to the rear of the turbo and it turns out the downpipe and the wastegate are hitting, causing it to be short about 3'' for the trubo. i will be running open wastegate so would it be a problem to face to open protion towards the manifold? also, if my downpipe does not clear the wastegate, then what should i do? i do not want to downgrade the wastegate at all. any input would be very helpful. thanks in advanced:1zhelp:

 

[GotTurbos?]

Can you post up some pics? Are you asking if it is okay to have your wastegate dump like right back onto your exhaust manifold? I had my wastegate dump back down onto the downpipe/firewall area for a couple weeks while I found a dump tube and had the fitting welded and I didn't have a problem. But I wouldn't feel comfortable about it dumping back onto the exhaust manifold and turbo region as there is a lot of other stuff there (wiring and such)

 

[91 mK3]

i can get some pictures up tomorrow. the only other way the wastegate can fit is if the dumtube section is point up. i do not want to do that but will have to if i have no choice. the only wiriing there would be wires for the o2 sensor. my wastegate is in the way of my downpipe connection to my turbo.

 

[92TealSupra]

I would not re-dump it into the manifold.

 

[91 mK3]

should i have the downpipe cut from where the v-band was attatched and jus extend it to fit the turbo? are there any sort of double sided v-band extensions?

 

[GotTurbos?]

should i have the downpipe cut from where the v-band was attatched and jus extend it to fit the turbo? are there any sort of double sided v-band extensions?

I would modify the manifold and wastegate before messing with the DP. moving the DP further back would probably place it way too close to your firewall, and likely touch your speedometer cable causing it to melt and break.

 

[91 mK3]

hmmmm. i would hate having to modify to take the manifold out. it did take me about 45 minutes to put it on because of the bolts towards the bottom of the manifold

 

[GotTurbos?]

hmmmm. i would hate having to modify to take the manifold out. it did take me about 45 minutes to put it on because of the bolts towards the bottom of the manifold

Haha, I feel your pain. But you'll be much better at it if you're forced to do it again! In the end modifying the wastegate placement will be much better, and everything will be done right, instead of extending the DP to make up for bad wastegate placement and having to worry about melting stuff. It might be as simple as having the flange cut and rotated so I really think it would be worth it. We really would have to see pics to know for sure what is going on so I guess I'll have more input for you tomorrow!

 

[91 mK3]

yesm, tomm it is. maybe i can play with it some more. i was working on this when it was really dark, and all i really had was a flashlight that wasnt working half the time

 

[91 mK3]

hmm, maybe i call the local supra tech suppport guy tomm. suprastanger507mgte, make sure u pik up tomm. lol

 

[91 mK3]

sorry guys, no pictures today. hindu new year is tomm and gotta do hella other shyt. id rather b working on the car but this does come once a year. i will try to get some piks up tomm

 

[91 mK3]

ok guys, here are the pictures. i do have another problem now. the external diamter of the v-band is actually smaller then the external diamtere of the turbo housing. its about 3.5" on the turbo side and about 3" on the v-band. so, jus cut the v-band and have new one with 3.5" welded on? heres the pics of the v-band next to the turbo and also the downpipe touching the wastegate.

 

[Gritz]

looks like you could cut the wastegate flange back about 1" that would give you room

 

[GotTurbos?]

http://i37.photobucket.com/albums/e74/krishneel2/DSCN0423.jpg In this picture, isn't it the part of the wastegate with the valve that is supposed to bolt to the manifold?


And on a side note MAKE SURE you change the angle of your turbo, the drain is supposed to be straight down, and the feed at the very top. The way you have it now could cause some problems.

Jon

 

[91 mK3]

im not sure. i wouldnt think so. well anyways, im going to take out the wastegate and get some more information on how its supposed to be mounted. thanks for the headsup for the turbo feed and drain.

 

[91 mK3]

im going to try to make a better fitment tomm, if i have to, then i will take out the manifold. and make it right from the get-go. sinc ei have time from tomm, i can actually do some work on my car. i also found a welder today, turns out we from the same country to welding=FREE. lol.

 

[dogdrake]

looks like the wastegate is mounted on the dump side, looks wrong to me ?

 

[GotTurbos?]

looks like the wastegate is mounted on the dump side, looks wrong to me ?

That's what I was saying. Looks like that is the problem

 

[Zumtizzle]

why is the pcv on the valve cover capped off?

good luck kish.

Happy Late Diwali.

-Sumeet

 

[91 mK3]

happy late diwali man.


for the wastegate, it was installed wrong. i put it on correctly and everything mounted like a charm. i started the engine yesterday wit open pipe and that sucker is loud. now i have another problem, i cant rev past 3500. everything was fine when i used to have the tt setup. no check engine lights on at all. i did disconnect the tps, and it was the same so im thinking somehing with the tps? maybe wiring?