ARP main stud fouling problem
Turbo Mini Forums

After fitting arp studs/nuts to the main bearings i went to join the gearbox to the engine and the studs/nuts fouled both outer edges of the gearbox , has anyone else experienced this problem with arp studs?

part number for the studs are 206-5401 BMC A series main stud kit.

thanks


edit: forgot to mention i am using them on an a plus engine

Edited by Monkeh on 28th Aug, 2008.

that always happen, and is why for example APT in the US sell bolts for the two end main caps and studs for the middle ones as a kit.

if you go onto apt s website they have a step by step guide for fitting the studs and which bits of the gearbox to modify

ok been doing a bit of searching around, and found that standard main bolts are of pretty good quality, more than up to the job, but the 3 stripe bolts that come with most centre straps are not that good at all, is this the case?

also my centre strap is just over 1/2 inch thick, whereas most of the ones i have seen on here are 1 x 1 inch square bar. do you think this will do?

Schrödinger's cat - so which one am I ???

http://www.aptfast.com/

then follow the how to link then mains studs

thanks for all the help so far, some more questions:

why do arp make a set that dont fit unless you modify the box (i dont think its worth the hassle)

if i use standard bolts for the end 2 caps will i need to use brand new standard bolts or will i be alright with the old ones.

ive torqued up the bolts which came with the strap to slightly more than standard (before i realised they were worse) and i fear they probably have stretched. without knowing how long they were beforehand, is there any way of telling if they have stretched, like their width.

finally, does anyone have a pair of longer bolts for the cenrte cap with strap for sale here on forum, i read in another post that someone was thinking about buying a lot of them to sell on.

cheers

If the center main strap bolts have only three dashes on the head, bin them straight away and get hold of some decent ones

http://www.turbominis.co.uk/forums/index.php?p=vt&tid=154716


As for ARP studs. For the A series they were really designed for the inline engines, but, as studs are a better method of fastening, if you want to use them on the transverse engine you need to carry out a modification, much in the same way that you have to modify the gearbox also to fit an LSD, just because an LSD fouls the gearbox casing doenst mean its the fault of the LSD manufacturer, its just how they are made.

Can't see that the studs fouling the gearbox being the fault of ARP unless you want and expensive nut and stud set that is infact worse than the standard bolts.


For the price of new bolts, I will always use new Standard A+ Mains bolts are incorrectly labled as useless for performance use

My ARP main studs are still sitting in my toolbox.....They have been there for 14 years now ffs !!!!!!

They didnt fit back then, and still dont today. That must be a record !!! lol

9.85 @ 145mph
202mph standing mile
speed didn't kill me, but taxation probably will

could be some cheap stud sets for sale soon ))))))))))