m30 turbo options.

[gall]

Hey everybody,

i've been given a large Garrett turbo at work from a truck for free and was wondering what you guys thought.

pics with a 300mm ruler.











numbers on the palte are as follows,

1250750
452070-3
AF00458ATA5130

sizes form the turbo are as follows,

comp A/R 72
cold inlet 76mm
cold outlet 57mm

hot outlet 84mm
turbo flange size is 113x70mm, what flange is this???

i think this turbo is too big as i've looked at the engine cc it came off and it works out at 11L the same as a holset hx50-55. Has any1 got any idea if this would work or should i take it to a turbo company and put it in against another smaller turbo.

any help on this subject would be very usefull.

Cheers

Andy.

[Gunni]

a 76mm inducer on the intake is quite large,
55 is good for about 450whp generally speaking,

what are your plans in terms of power?

[gall]

Hi Gunni,

as i said i got it for free so i think i'll stick it on ebay and get another one cheap from the US. I've been looking on ebay.com at them and they are cheap.

http://cgi.ebay.com/ebaymotors/Precisio ... dZViewItem

i'll be looking at a usble 400-500whp so i can shut me mate up that has a supra standard turbo,i can keep up until his boost comes on then its good bye!!

it'll be my daily car so has tobe safe, what sort of trim would you suggest as i'm not up to speed on all the different trims there are!!

cheers

Andy.

[Gunni]

Well I hate staying on the Holset train all the time, but you really should look at what´s been done with them.

check out the pure performance website´s forum and you´ll see.

In the Holset case I would suggest no less then HX50 and you should be leaving your friend
easily.

[E30BeemerLad]

feck me that thing is massive

would the characteristics of a turbo that size be that it would not wake up until about 5K revs?

[gall]

Hi Gunni,

the turbo in the picture came off a DAF truck as shown from the website below, all 11600cc of it.

model number is TA5130

http://www.turbomaster.info/eng/applica ... F&logo=daf

The holset HX50-55 turbo you are saying about works best with engines between 10L and 15L as shown below.

http://www.holset.co.uk/files/2_1_1_5-H ... X50-55.php

it's just the trims of the turbo that i don't know about. the gerrett gt30r and gt35r are widely used in the US with good results of over 500rwp.

cheers

Andy.

[Ant]

For guidance( yup more Holsets )

Big trim HX35W with 16cm housing on the hotside on a 2.7 low comp makes positive pressure @2.8K , boosts hard @ 3.3

HX40 , again in big trim but with a 19cm hotside housing on the same motor boosts a little later but with more of an on/off feel to it.

Both flow very well with low EGT's measured @ no 6 cyl

The wheel size and housing sizes are the bits to get "right" for the application, and no-one does as many variations as Holset as per Gunnis' info, hit th PPF site, Turbobricks and anything else you can find of relevance. and make an informed choice

Hx50....... you know you want to

[gall]

Hi Ant,

hope you'd help with this one, what do ya think of the turbo in the pic at the top of the post, same engine size as a hx50 but gunni said it might be alittle too big for a m30.

what you think???

cheers

Andy.

[Ant]

Andy.

I dont like to comment on stuff I have no experience with, I've not done an M30 yet, I have helped a little with Toby Unnas but that is very much his conversion, and very nice too ( still no like the TB's though.... )

from memory his car made 324HP on 6psi on a T4, boost came in at 3500 rpms iirc, awesome shove

Typically you'll want a turbo 2x the size of what you think you'll need to make good top end HP, but if its all used in one 5K to limiter burst, how good is that gonna be as a daily ??

The huge holsets work well as they are diesel turbos, so given much higher EGT of petrol, they will boost at the same point in the rev range as they did in the OE application,

Some very rough examples of why these work so well ;

Cummins 6BTA engine, 6 cyl 12V diesel, HX35W, boost at 1700, engine rev range 0 to 3400 rpms EGT of 300approx
so, in simple terms the turbo boosts @ 50% of the engines rev range

BMW 6 cyl M30B30 , 6 cyl petrol, same snail; as above on similar mainfolding setup, with EGT of 600C, the turbo should spool at 3.2K ish all the way to a 6600 rpm redline

^ see where we're going here ?

I assume your car is RHD, keep that in mind as a 3" downpipe is a hard squeeze and a very large turbo will require a large d/pipe bore to prevent it bacpressuring with some unwelcome effects

The turbo you posted @ top of the page looks to be OK in terms of dims, but its a much older design and possibly less suitable , but as you say its FOC , me, I'd bolt it up and find out

[Toby_Unna]

me, I'd bolt it up and find out

i would too Andy. if it turns out to boost too late at least it'll give you an idea of which direction to take when choosing a replacement, nothing lost apart from possibly mods to downpipe to change turbo.

400+ rwhp sounds like a lot in longevity terms for a daily driver though, unless you're going to rebuild with low comp pistons etc?

@Ant... TBs are lovely thanks, you just don't like 'em because you're the poor sod that had to map it

O/T that WB02 still available?

[Ant]

yes mate, just been too busy to make the tri to the PO, will action next week dude