Buying An Uprated Wastegate Actuator

1803 Views 15 Replies 6 Participants Last post by Motorhead, Apr 4, 2010

Motorhead

Discussion Starter · Apr 3, 2010

I have a garrett gt2554 turbo originally purchased from begi. I want to buy an uprated actuator which will deal with about 12 psi (currently limited to about 6 with some adjustment upwards but not enough). I don't want to buy from begi as I need the item as soon as possible (sooner the better).

Does anyone know of where I can get hold of the right part? Also does anyone happen to know if the begi s turbo kits had anything done to the actuators by bell? Is the actuator a standard, off the shelf part? (I'd ask bell but they may not be too forthcoming if they realize I'm not buying anything from them, or tell me I can only buy what I need from them)

If anyone happens to know a part number for what I'm after that would be even more of a help.

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chrisgunton

· #2 · Apr 3, 2010

Im going down the EBC instead, even a manual boost controller will do. I have a manual one if you want it?

(correct me if I'm wrong! it's rare that I know something about this!)

Motorhead

Discussion Starter · #3 · Apr 3, 2010

chrisgunton said:
Im going down the EBC instead, even a manual boost controller will do. I have a manual one if you want it?

(correct me if I'm wrong! it's rare that I know something about this!)

Yeah that's a possibility which I might need to look into a bit further, but at the moment I'd like to keep it simple (if I can get the part without a 3 month delay

) by just changing the actuator. What's the mechanical boost controller you have and how much are you after for it?

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indykid

· #4 · Apr 3, 2010 (Edited by Moderator)

chrisgunton said:
Im going down the EBC instead, even a manual boost controller will do. I have a manual one if you want it?

(correct me if I'm wrong! it's rare that I know something about this!)

there'll come a point where a weak actuatored wastegate will get blown open whatever control pressure you do or don't put to it.

if you have some adjustment up, why not use that adjustment and run an EBC?

pat's got to 13ish psi with the standard actuator and full bleed on the EBC
tom

Motorhead

Discussion Starter · #5 · Apr 3, 2010

indykid said:
Im going down the EBC instead, even a manual boost controller will do. I have a manual one if you want it?

(correct me if I'm wrong! it's rare that I know something about this!)

there'll come a point where a weak actuatored wastegate will get blown open whatever control pressure you do or don't put to it.

if you have some adjustment up, why not use that adjustment and run an EBC?

pat's got to 13ish psi with the standard actuator and full bleed on the EBC
tom
[/quote]

EBC is another possibility and if sourcing the actuator is too much of a pain in the arse I might have to look into it further. I can tie that in to the adaptronic, but I would need to RTFM to work out how exactly.

chrisgunton

· #6 · Apr 3, 2010

is it a shanghai kit you have?

the garrett actuator they sent me for mine had the thread changed on the arm - everything else looked the same.

not sure what make the boost controller it. will take a few pics. the adjustment bolt is a bit rusty but it should work fine once cleaned up.

Chris' UK Miata

· #7 · Apr 3, 2010 (Edited by Moderator)

If you can wire it in without headbutting a wall with frustration, Greddy Profec's aren't ??? nowadays. I have a version 1, so not the best, but pull a happy 15 psi out of mine when req'd. It's got a cool dial on it to so you can turn boost up and down like a volume dial on yer stereo... Sweet!

Motorhead

Discussion Starter · #8 · Apr 4, 2010

chrisgunton said:
is it a shanghai kit you have?

the garrett actuator they sent me for mine had the thread changed on the arm - everything else looked the same.

not sure what make the boost controller it. will take a few pics. the adjustment bolt is a bit rusty but it should work fine once cleaned up.

I have a garrett charger. I'll keep an eye out for pictures, how much do you want for it?

Motorhead

Discussion Starter · #9 · Apr 4, 2010 (Edited by Moderator)

Chris said:
If you can wire it in without headbutting a wall with frustration, Greddy Profec's aren't £££ nowadays. I have a version 1, so not the best, but pull a happy 15 psi out of mine when req'd. It's got a cool dial on it to so you can turn boost up and down like a volume dial on yer stereo... Sweet!

Any idea what they cost and where they can be got from?

oof, just checked out the price on the profec spec 2, probably a bit more than wish to spend currently.

friendly1_uk

· #10 · Apr 4, 2010

-31 i think? 6psi to 20psi adjustment.

Tightening it up may get you towards 9psi.

Motorhead

Discussion Starter · #11 · Apr 4, 2010

friendly1_uk said:
-31 i think? 6psi to 20psi adjustment.

Tightening it up may get you towards 9psi.

Sorry what do you mean by "-31", is that a part? 6-20 psi would be good as I'm aiming at about 12 psi. I may have found what I'm looking for though:-

http://www.gb-ent.com/store/turbos-and-accessories/boost-control/garrett-actuator-only-for-gt28%1030-etc-%11-bent-arm.html

This is mine:-

Although it states its an upgrade for a T28, it looks exactly the same as mine.There is a number on it
480009 which matches a number on mine. Anyone know what this number might mean? Also is it going to be a straight swap for my old actuator? It looks like it will to me, but anyone know for sure?

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Motorhead

Discussion Starter · #12 · Apr 4, 2010

friendly1_uk said:
-31 i think? 6psi to 20psi adjustment.

Tightening it up may get you towards 9psi.

-31 seems to be good for 8psi, the -34 is good for 14psi. The ones I've found so far all seem to have a straight rod though.

Blaize

· #13 · Apr 4, 2010

I don't mean to send this thread off topic, and I may be seeing it wrong, but is that your oil feed line entering from the side? If so you should really clock the CHRA to get the oil flow vertical/down.

Not that I would presume that BEGI didn't do it for you. Not BEGI, no they NEVER make little mistakes........

friendly1_uk

· #14 · Apr 4, 2010

i presume you know your actuator(well most actuators)can be adjusted. Its all about boost on a diaphram thats held by a spring. The tension of/on the spring can be altered by loading it up. A process achieved by twisting the turnbuckle up the rod so it holds the gate shut with more force. Thus you will need more boost to open the gate. If its 6psi stock, i expect it will tweak towards 9psi.

The -31 starts at 6-8psi and by shortening the rod(by spinning the buckle)it goes way past 20psi but i dont recall the exact number. Its a pritty big item, and craigo even had a tuner tell him it was to big for his t25 to open. Rubbish ofcource but it is big. A -34 is 'huge' and of no use at all.

A t28 turbo is a t25 with the compressor (air) houseing swapped for a t3 one. If your actuator mounts off the turbine (exhaust) houseing then the size of the compressor is of no consequence. The t28 actuator should fit the t25. Just as long as the compressor houseing plays no part in the mounting of the actuator. Oh... and as long as the turbo has no been clocked to an odd position. And yours has had its clocking(orientation) questioned.

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Motorhead

Discussion Starter · #15 · Apr 4, 2010

Blaize said:
I don't mean to send this thread off topic, and I may be seeing it wrong, but is that your oil feed line entering from the side? If so you should really clock the CHRA to get the oil flow vertical/down.

Not that I would presume that BEGI didn't do it for you. Not BEGI, no they NEVER make little mistakes........

The one feed you can see is the water coolant out feed. BEGI don't clock the turbo for you that has to be done as part of the installation.

Motorhead

Discussion Starter · #16 · Apr 4, 2010

friendly1_uk said:
i presume you know your actuator(well most actuators)can be adjusted. Its all about boost on a diaphram thats held by a spring. The tension of/on the spring can be altered by loading it up. A process achieved by twisting the turnbuckle up the rod so it holds the gate shut with more force. Thus you will need more boost to open the gate. If its 6psi stock, i expect it will tweak towards 9psi.

The -31 starts at 6-8psi and by shortening the rod(by spinning the buckle)it goes way past 20psi but i dont recall the exact number. Its a pritty big item, and craigo even had a tuner tell him it was to big for his t25 to open. Rubbish ofcource but it is big. A -34 is 'huge' and of no use at all.

A t28 turbo is a t25 with the compressor (air) houseing swapped for a t3 one. If your actuator mounts off the turbine (exhaust) houseing then the size of the compressor is of no consequence. The t28 actuator should fit the t25. Just as long as the compressor houseing plays no part in the mounting of the actuator. Oh... and as long as the turbo has no been clocked to an odd position. And yours has had its clocking(orientation) questioned.

Yes I reckon mine could be adjusted to about 8 psi (iirc I think begi say its rated for 5-8 psi).

The info I found online on a vendors website for the -31 reckoned 8 psi and for the -34 14 psi. Perhaps their info was wrong.

Thanks for the info on the T28, by what you say it sounds like the part I found online would do the job.

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