another dumb turbo question

[Fatty]

can you fine people please tell me, is the turbo inlet, the bit that bolts onto the exhaust manifold, a standard size on all turbos? or are they different sizes depending on brand, size etc...

if i'm looking at different brands of turbos, will they all bolt up to say, an avo manifold, or will i ned to get an adpaptor plate or something ? ?

[bark]

Hi Fatty, there is no \"one size\" flange (the bit that you are refering to) in turbo's unfortunately... They do come in different configurations depending on size and brand as you state.

Is the AVO turbo manifold a T25/T28 design?

Ben

[Fatty]

thanks for the reply ben. yes i beleive the avo manifold is designed for a garrett t25 or t28 style turbo.

i was looking at an IHI trubo but the seller has very little info on it... he doesn;t even know what car it is from . all he knows is that he has been told its suitable for small engines, less than 2 litres.

i was only interested coz it's very cheap, but don't wanna get stuck with something that i can't find a suitable manifold for. is it possiblt to make an adaptor bracket to fit mismatched flanges ? ?

[Benny]

thanks for the reply ben. yes i beleive the avo manifold is designed for a garrett t25 or t28 style turbo.

i was looking at an IHI trubo but the seller has very little info on it... he doesn;t even know what car it is from . all he knows is that he has been told its suitable for small engines, less than 2 litres.

i was only interested coz it's very cheap, but don't wanna get stuck with something that i can't find a suitable manifold for. is it possiblt to make an adaptor bracket to fit mismatched flanges ? ?

When you get it fitted, your exhaust guy can easily make you a flange that will fit.

[Fatty]

sorry, i'm talking about bolting it to the manifold that bolts on to the engine. for example, in this pic. the smaller of the two , the one at the top. sorry , i'm just a little unclear if this is what you meant, or did you mean the big exhaust pipe thing... sorry but i'm suffereing from the flu and not thinking too well today

[glen73]

I have the flu too, must be a melbourne thing. 2nd time this winter!!!

i think what benny means is that the exhaust guy will alter the manifold (small thingy) to suit the turbo. me personally i would either stick with a T25, T28 or TD04H. everyone has used these and are proven. also if you alter the manifold and the turbo doesnt really suit your needs then you have gone and altered your manifold for nothing. stop saying sorry people like to answer this sort of stuff.
i wish this flu would go away

[Russellb]

So what Manifold do you have ?? If it's a AVO one then Like Bark said
t25/28 flange
If it the one from Ebay ( great place to buy alsorts of goodies) then they will suit a TD04 turbo flange set up
I found that the manifold was the Hard thing to find for the 1.8
so I bought that first then Sorced a turbo to Suit ( They are easy to find)
And like Glen said stop saying SORRY
Sorry

[NMX516]

The problem with having an adaptor made up is that it can move the turbo too far, and so it could foul on other bits and pieces in the engine bay... It could be more trouble than it is worth with an adaptor plate.

Buying 2nd hand turbos can be a risky business. IMO you are best off saving the $'s for a newy. GT25's are available for about $1k these days, and T25's in vgc should be under $600.

Things you've got to look for are:
- shaft play - expect NONE!
- cracked housings - unfortunately these are sometimes not visible to the naked eye
- damaged/chipped/broken turbine wheels
- the wheels should spin freely and evenly. If they sound like they are rubbing on the housing, walk away!

Honestly, repairing a 2nd hand turbo can easily cost more than buying a brand new one in the first place, especially with new ones so cheap these days... Min cost for a decent rebuild on a T25 is approx $600 if it only needs new seals and bearings. I had a T25G rebuilt by MTQ last year, and all up it was just over $600. If the wheels or housings are stuffed, the bill can quickly get to $1k. For that money, you're better off with a GT series turbo.

[Fatty]

gee i did say sorry a few times... sorry about that

i must admit this whole turbo thing is confusing. i was looking at the t25 initially but even amongst t25/gt25's there seems to be a lot of different models????
where can i find this gt25 for $1000 new?? that seems pretty good.


can someone give me an exact model number that i should be looking at?? there seem to be about 10 dor more garret t25s? i just want something that spools nice and fast..is the gt25 a ball bearing turbo? i want something drivable on the street, i'm not looking for massive power, i drive the car every day and just want quicker take offs, and better power out of corners.

thanks for yr help so far everyone, i think i'll give this IHI a miss .

[Russellb]

Hey I got a T25 Off ebay cost $160 delivered It minor marks on the Compressor wheel but no shaft play
It has a A/R of 0.86 and is a plain bush. It starts to make boost at 2200RPM and reachers 7PSI at 2800
I rarely tak my car past 6000 now because you just pick another gear and keep going Nake 104KW ATW and is Too much fun around town

[Fatty]

ah right that whole A/R thing, just one more thing to confuse me

i beleive lower a/r's bring on the boost quicker. ? .86 seems kinda high , but you reckon it drives great on the street eh?

[Russellb]

A/R F**k Knows the way it works I know that My turbo work's great
I am looking at upgrading as it's size is costing power up high
Read a book Maxumim Boost it explaned how the A/R thing worked

[4sfed5]

If you can get a turbo thats meant for a 2 liter factory turbo then thats what you want..im running a IHI VF10 from a subaru legacy and a friend has a T3 turbo from a RB20 skyline on his toyota....both turbos reach 7.5 PSI at just on 3000rpm and have great response...having a turbo that spools lower than 3000 rpm usually means its \"too small\" and will hamper top end HP.
Stock WRX turbos can be had for next to nothing and would go great on a 1600.

[Fatty]

what manifold are u using with that turbo 4sfed5??

[glen73]

which part of melb you in fatty?