armand993

hi guys. i did a search already, i am installing gt2 rear solid subframe mounts. one ? does shorter mount go towards the front of the car or rear of the car. no instructions of course. thanks in advance armand

Jean

The shorter ones are for the rear. Make sure you tighten the front ones to 100NM and the rear to 120NM. Use new bolts and the right washers, these M12 bolts can be tightened three times only.

I had the unpleasant surprise to find out that I had lost the rear mount and did not know it, a routine turbo inspection made me see the missing mount. The car was handling like cr@p and I even thought on the track that I had to finally bow to the superiority of the 997TT. The chassis was about 2 inches apart from the subframe, the best way to hit the wall at 150mph.

Get a top notch experienced professional to fit them, trust me on this one.

armand993

jean thanks alot for the reply. now i have my project for tommorrow.thanks armand

Felix

Who are you sourcing the mounts from?

Jean

Phelix you need to get thgem from Porsche Motrosports, in the UK I think Colin (9M) and certainly Phil at Tech 9 can provide you with the parts. They are cup parts, you need 8 of them but I would only install them if my car is a track car or you are experiencing serious squatting and throttle steer or an unstable rear. The mounts change slightly the angle of the subframe setup to improve handling.

Felix

Hi Jean,

Thanks for that; just curious to know exactly what's being spoken of. Are they the same as the item on page 71 of the catalogue at www.smartracingproducts.com/rearaxle.htm ?

Steve Nagata

Hope these pics help. These are from my friends install.

ruffy

so this is not a mod for everyone eh?
how much time is it worth on the track? just curious.
TIA!

viperbob

I also get these from ERP.

Felix

I've just realised that there are two similar products at http://www.smartracingproducts.com/p...6_rearaxle.pdf

There are solids mounts for the suspension carriage (pn 563013) and then there's a kit (pn 563016) that's the GT2 style tilted mounts.

I'm guessing the former is fine for street use but the latter is for track users?

TheOtherEric

Odd, the ERP subframe mounts are a LOT shorter than these (see the pic in the PDF file from SmartRacing). This causes about an inch of the bolt to protrude. That means you need shorter bolts, or lots of washers. Unless mine are installed incorrectly.

Viperbob- since you got these parts for me, do you have any comments as to my installation?

viperbob

These are the GT2 mounts. You have the soild mounts. The GT2 angles the entire suspension cage differently relative to the body....

TheOtherEric

Weird. Do you have any opinion on which is better/worse for track use? (GT2 versus ERP)

viperbob

ERP makes both models. Regular and GT2. The GT2 was designed specifically for high HP application. NA cars can use either and be OK.

Red rooster

Just a small word of caution . I well remember a 993 with solid top mounts that smashed on one side when the car found a severe manhole cover !
Solid stuff is great for the track but maybe not so good for road ??

Geoff