As I am in the market for a new turbo im having a look at this, is it worth it?
http://cgi.ebay.co.uk/Renault-5-gt-t...1%7C240%3A1318
If I dont go for this I am going for a gt2554r with a .49 rear end with t3 .42 compressor housing will this work ok with the k-tec cam that you dont have to use springs with?
It's a starting price of £650... It's also been sat in his garage, which isn't a great start. The core will be bone dry, rust can also occur internally.
You can't fit a T3 .42 a/r onto a GT2554R as it's a GT25, you can only fit T3 housings onto T3 compressor wheels, or GT28/T28 wheels.
ive seen this turbo in the flesh an its mint, very big tho... lol was tempted but was too big for me..Originally Posted by rs250nut
I mentioned this in another thread the other day - With regards to the 2554r, it doesn't matter if you do fit a .49 hotside housing, the turbine wheel is still gonna be the same size, and thus, that's gonna be where ya lag issue is stemming from.
Not so sure you can swap that compressor housing onto a gt25 wheel either?
If you're planning on using it as a track turbo, and thus in the high revs area the majority of the time, it'll probably be ok to use, but going from your cam quote I'm guessing that isn't gonna be the case.
With regards to the ktr350, it's not a '40psi' turbo, and will probably be maxed out around 230hp. On the plus side, it won't be as laggy as the 2554r.
how big is the 2554r then as this ktr turbo is huge an thought it had a fair bit of lag???
Thanks for clearing that up matey thats just the way it was decribed, No matter how I look at it its going to hurt my wallet.
Dimension wise, probably not a great deal of difference, but it runs a larger (53mm 62trim) turbine.
Iirc, I think that's only a circa 240hp turbo as well, so it's not like you're gonna be getting fantastic power (when comparing to the 350) by having to run it in a higher rev range.
I dont want a really peaky, narrow power band motor, What cam and turbo would you use? I do have a 285 with springs in the garage but I think the springs are to much as in my old engine the valve head it self broke off and destroyed the engine.
It won't be that much of a narrow-band (with the 2554r), but it will want some revs thrown at it.
There's no set answer as to an ideal cam & turbo setup I'm afraid. It also depends what you want from the car, and in which environment it's predominantly gonna be used? ie, responsive country lane driving car? Drag beast? Track attack monster?
K-tec use the GT28R core and swap the comp/turbine housings over to suit the 5. I can also tell that comp wheel is the 28 60 trim wheel from the comp housing inlet.
the no.1 c1j in our leaderboard used a 2554r though. running way off the map mind!
how big is the 2554r then as this ktr turbo is huge an thought it had a fair bit of lag???
The 2554R is the rollerbearing upgrade for the CA18det (s13 200sx) ... http://www.turbobygarrett.com/turbob...R_471171_3.htm
K-tec's turbo is simply a GT28R, they've taken the supplied compressor housing and exhaust housing off and fitted smaller ones to make it more managable for the 5.
so they have someone to machine up .49 turbines for the 28r core then ?
I'd assume so, it's an arse of a job too, hence the prices. There's .49 housings available for the GT cores now, but I don't know where they're available from...
The guy who built the engine Bruce said that it made peak power at 6400. I will be using it for road driving alot of the time with a few track days thrown in. Driving flat out in a straight line has never appealed to me that much but would like to give it a try. Im only going to be using this set up for a while as I wait for my f7r-p to built, I know its not the best base to start with but I have one in the garage.
That peak power would of had a massive influence from the turbo he was using. For example, you wouldn't get power that high up with a T2.
The guy I spoke to at cr turbos said that he has them cast for the 5.
GT or old skool T 28? I thought that turbo had been out a while before the GT series had been launched, unless of course they changed the product but kept the 350 name?
Scoff, that's why I mentioned the 2554r is more at home in a high-rev'ing environment (track/drag use) as opposed to point to point driving down ya average country lane (where lag would be a pain in the ass).
GT, I always assumed the 350 was the GT28R, and the ones i've seen have always been rollerbearing. Confusing thread...
Ok, but you can (still) get old skool T series blowers with RB cores.
The only ones i've come across are T3 or larger. I took a Turbonetics one apart last year and it was the biggest pile of **** i'd seen. It only used a rollerbearing cartridge on the compressor side, which is clearly where it's needed...
I remember the old 'T25' blowers I supplied several members (Sparkie, JP, Makaveli, to name 3) many years back had an RB core, and for sure, that was before the GT series units hit the market over here.
I've not seen them in the T25 bearings housings, but it would have posed one other benefit apart from the lag. You would be able to rebuild them, if they hadn't totally fubar'd, and you were able to get hold of the cartridges.
Oh, and as far as I can remember, the T series conversions still ran the thrust bearing.
Adam, what spec was that turbocharger you leant to me that went on the 19 Chamade turbo? The 1 that ran 18psi and gave us 180bhp and ft/lbs torque, it definitely wasn't a T28 sized turbo IIRC.
As you know i'm looking into buying a new turbo, i'm have a std bottom end, cam and head, to run just over a bar of boost.
That was a full T25, Tomcat if you will, with a machined T2 .35 a/r exhaust housing.
as where talking turbos.....
why are they such a rip offi cant see why turbos cost soo bloody much?
i can understand that its all precision work but surely all the componants cant be cost that much for companies to charge silly amounts?
when i say silly amounts im talking £600+
Parts aren't cheap for them, unfortunatley. If you're going off those ''service'' kits on ebay, you're mistaken. That's all they are too, for servicing a working turbo. They're a waste of money if your turbo already has failure symptoms.
There's alot of time that goes into machining parts, especially on hybrids, not to mention the cost of actuators/comp wheels/shafts/360 thrust bearings and so on... You'd be suprised how little profit we make on the hybrids we sell. That's why we mainly deal with standard units that we can have a constant supply of on the shelf.
The hybrid market is too up and down to bother with batches.
thanks for that adami dont think i could ever afford a fancy turbo, i think the last time i bought a turbo it cost me around £250 cash for a std recon t2.
ahh well maybe i'll treat myself in the future
Was a good turbo
not everyone can afford the big stuff, but I try to give people a managable price when quoting, except on the rollerbearings, whhich is out of my hands.thanks for that adam
ahh well maybe i'll treat myself in the future
It was indeed, it made my old electric blue 5 shift.Was a good turbo
what was the large bb tunings roller bearing turbo?
Where's my 20g wheel?
Someone hear something?...
Last edited by Adam L; 17-11-2008 at 23:16.
Can you text me a price for that 1 if possible
GT28R again, modified the same way K-tec's is, but with a serious lack of effort. I spoke to someone on the phone a couple of weeks ago and they told me BB had welded the core to the exhaust housing
On, its way...Can you text me a price for that 1 if possible
Blimey that was quick, cheers
Again? We still haven't confirmed the first one yet!
Again? We still haven't confirmed the first one yet!
Trust, I know
That one in the ebay advert is without a doubt a rb, the core is a different shape. And I ordered in a GT28R to replace another persons BB rb last week, which wasn't welded together, but shady none the less.
6 bolts... but what's the exhaust housing?Trust, I know
That one in the ebay advert is without a doubt a rb, the core is a different shape. And I ordered in a GT28R to replace another persons BB rb last week, which wasn't welded together, but shady none the less.
.49, although they haven't drilled the required hole for it to fit the Renault elbow properly. That's a T series housing they've used aswell.
The .64 has a differen't wastegate penny and arm, even though the scroll looks similar in size...
on the subjext of turbos i have a gt28r to fit with a 0.49 rear housing from turbo dynamics , i never thought of changing the compressor housing to a smaller size ..... do you think changing the compressor cover will make it boost earlier ?????
the compressor at the moment is 60mm-60trim / 60 AR
Last edited by ranj; 18-11-2008 at 15:15.
The comp housing shouldn't affect spool up, as it's the turbine wheel that's powered by the exhaust gas.
Ill stick with i have and see how it goes then ....
Went with the 2554r with a -34 actuator does look quite large.
what are you doing for a cam? I've lost track..
K-tec The one you dont have to use springs with, In my old engine that came with the car is a piper 285 should i use this? I dont have forged pistons
you'd be better with a 285, check that the peaks haven't worn off the one you have.
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