Converting internal wastegate to external wastegate queries
Turbo Mini Forums

Is this possible to do?

Obviously this would mean a new exhaust side to the turbo normally. Otherwise is it possible any other way?

Can you buy this side of the turbo?

I ask as i was given a T2 turbo today for helping out a friend in need. The turbo is in great nick with no play (other than what is needed) and i was also given an external waste gate.

Remove the standard wastegate flap, weld up or drill/tap/plug the hole that the arm used to go through, clean up the wategate port in the housing, buy a T2 flange for ebay, drill/tap to fit standard exhaust elbow, weld section of pipe to wastegate outlet part of flange to move external wastegate away from the heat, buy wastegate flange from ebay, weld it onto the bit of exhaust pipe from flange, fit wastegate, fabricate pipe from wastegate outlet back into exhaust downpipe at acute angle as poss., ideally 18" away from exducer/elbow.

Sorry for the rant, I have been mulling this over in my head for several weeks, thats my plan basically..
YeaBoi!

Its a lot of work, so unless you really NEED to, why bother?

Just thought it was worth asking.

You dont really NEED to increase the performance of a classic shape mini, its good enough fun so why bother really?

As soon as my turbo install is up and running, I will outfit a T2 outlet flange with an external wastegate setup.
Because I WANT TO and because I CAN.

lol

Edited by hario on 18th Apr, 2009.

Fair enough, if you want all that work for no discernable benefit, go ahead.

Does self satisfaction count?

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Own the day

I'm far from knowledgeable - which is why I tent mainly to read the site and not post lol.

But out of interest what would be the advantages of an external over an internal? From the looks of it there's a fair amount of work to be put in to adapting from the internal to external wastegate.

I did a little bit of research on the internet and a few people stated that the internal wastegates are often chaged due to boost creep? - just wondered what peoples thoughts were.

I know Jims has an external wastegate, does the DON have one Tom?

Sorry for the ramble

It tends mostly to be on the 16v heads where I guess they are flowing alot more exhaust gasses and so the small internal wastegate port can bypass the extra gasses to keep the boost at the set level, so a larger external one gets fitted to cope with gas.

I have a feeling that there is something to do with gas flow aswell that gives you an advantage, allbeit quite small?

Abit needless on a 5port IMO but it's good for pub points.

Ill be sticking with the 'I like turbos and all the associated paraphenalia, so there.' defence..
Id like to experiment with an electronic boost controller, for sure. The type with a solenoid interupting the wategate signal to competely aleviate actuator creep. I am surprised they are little used on here, all the jap people use them , I guess creep makes a bigger difference with the large wategates they use.

So, in short. Yes boldy if you have a turbo, a wastegate and some enthusiasm, do it mate I'd be very interested in the results and how you executed it, within the confines of the bonnet I should hope lopl.

I thought the Don was VNT? Time to dig, haha

nope,

mines the only engine (that might make big power) running a vnt.

hey its not that hard to put an exturnal gate on bro i mean i put 1 on my evo and it was easy using factory exhust manifold, but except when running the the pipe coming off the gate i just run a screamer pipe fuckn loud an puts the shits up people when u boost past them, my mini also has 1 but we built the manifold to have exturnal gate so was easyer than trying to mod it to put it on, but mainly wat im tryn to say is go with the exturnal and have a screamer pipe nice and loud and not wat u expect on a mini.

1966 MK1 1034CC TURBO MINI

o i did forget to say also haha not so legal as it vent exhust gas straight into the atmospher, but who givs u only live once and it sounds good specialy on mitsi's

1966 MK1 1034CC TURBO MINI

Right so it is possible.

I only asked as i was given an external wastgate with the turbo. I like the look of the external gate so wondered if i could do it.

The only issue i can see looking at the turbo would be the hole where the wastegate arm runs through the manifold along with the wall between the wastegate and main exhaust outake. would this need to be built up to finish flush with the face of the maifold? Ive got to ask as i dont know.

Edited by boldy on 20th Apr, 2009.

In the 13's at last!.. Just

I thought about those wastegate take-offs but I think the turbo would be a tight fit afterwards if that thing puts it 2-3 inches lower.

Welding to a cast exhaust housing could have cracking issues? This bolt on divider seems safer
http://cgi.ebay.co.uk/NISSAN-200SX-S14-STA...A1%7C240%3A1318

Even copying the whole thing would be an improvement over standard, seriously reducing turbulence aft of the exducer.

has anyone welded to the cast exhaust side of a turbo? (MIG) i will more than likely be running an external waste gate on mine

Yes i moved to the darkside

Instagram @jdm_brett

It can be done using this company.

http://www.slinden.co.uk/

They weld cast. could be worth giving them a shout.

Hario. I mentioned the wastegate take offs as i plan to side mount the turbo.

Oh right, cool.
Why side mount? You'll have plenty of space for stuff.