Hi all

I am getting the parts together for a greys/t34 conversion,but im unsure on a few things...My engine is a 8000 mile rebuilt standard spec engine and it has a t3 with .48 ex housing and green injectors.I have bought a msd chip,grey injectors and a .63 housing but im not sure what to do regarding head gasket which is a grp a version with a arp stud and nut kit...I have heard some bad stories about these arp stud and nut kits and as its only a grp a head gasket,iwas wondering if it would be better to fit a cometic head gasket now and take the stud and nut kit off and fit standard head bolts for this conversion???.Also,will i be able to strip my turbo,fit .63 housing and rebuild if i mark the shaft,so it goes back together exactly the same???

regards mark

 

Mark do you mean yours has a T34 already?

I think the block has been machined for long studs so you can't fit standard head bolts to that now!

 

I have a t34 with a .48 housing already and i have bought a .63 ex housing to fit to it...i think i have read before that you can diy as long as you mark the position of comp wheel to the shaft and reassemble in the same position,so as not to affect the balance...I have a arp stud and nut kit fitted by previous owner,which is not the long stud conversion,but studs that fit into the original head bolt holes and then the head is held down by nuts.I have read that this can cause cracking around the bolt holes and standard head bolts with cometic head gasket is better,but would like some discussion on this before i go ahead

mark

 

Don't know about the turbo i'm afraid!

Sorry mate I get what you mean now about the head bolts, I don't know that either though speak to Neil ' MELNEI cos he has the stud & nut kit and may be able to answer your question about using std headbolts again

if you can I'd g for std head bolts and a grp A gasket

 

i have used arp stud and nut kits with cometic gasket before and never had an issue and that was on t38, 34 psi 440 bhp

 

ARP stud and nut kit better than std head bolts all day long.
I would use a group a gasket up to around 400bhp, as it is fibrous so more forgiving than a metal one.
tabetha

 

I have a arp stud and nut kit and a group a head gasket so it should be fine then...i heard that the stud and nut kit can cause problems though,but cannot remember exactly.

regards mark

 

Your kit should be fine if installed properly pal.

Turbine housing doesnt require removal of any critical turbo parts, the core will come out of the old .48 with wheels etc still installed, just 6 x 13mm bolts.

Make sure when you tighten it all back up the wastegate is straight and will work correctly. Job done.

 

 

when i got my long stud kit i bought mountune 6 stud kit and had arp for the other 4,but was advised against this so used 4 standard stretch bolts with no issues