GTI6 rods

[mmt 15]

Hi Guys,

I need to fit a 21 mm pin into the 20 mm Gti 6 rod. 
 

is it safe/possible to open up the small end diameter the extra 1mm? 
 

or should I open it an fit a 21 mm new busing? 
 

thanks. 

[Andy 105 1 Cars]

As the o.e pin a press fit into the rod, I am not sure it is a bush .Others here will know better.My instinct is to re bush to 21mm if that is possible . 

[mmt 15]

My instinct as well:-)

[petert 586]

I assume the 21 pin is full floating? Then you really need to bore at least a 22.5mm hole (0.75mm wall thickness min) in the GTi6 rod. Is there enough material left to support the bush? What piston has a 21mm pin?

[mmt 15]

Thanks ,

 

Should be enough material for 22,5 mm. 
 

the piston is full floating, JE made them. 

[wladimir031 8]

GTi6 rod pin is 22mm ...

[B1ack_Mi16 67]

1.9 Mi16 pins are 22mm, but GTi6 are indeed smaller. I believe 20mm is correct.

[mmt 15]

Thanks guys. 
I used some custom rods for My JE pistons. All good now. 
 

anyone know How deep pockets I Would need to mill in Std. GTI6 pistons to make room for solid lifter higher lift cams?  
 

thanks. 

[welshpug 1,657]

you can go +1mm safely on the standard crown, which is enough for mild fast road cams.

 

anything bigger will need an aftermarket piston with much deeper cutouts and a higher compression to suit the longer duration

[petert 586]

11 hours ago, mmt said:

 

anyone know How deep pockets I Would need to mill in Std. GTI6 pistons to make room for solid lifter higher lift cams?  
 

 

That's a "how long is a piece of string" question. Until you've cut valve seats and done a trial assembly, you'll never know. Any solid cam worth installing will need the pockets deepened by at least 3-4mm. You'd probably want to cut open a piston and assess how much material is there.

Edited August 3, 2020 by petert

[welshpug 1,657]

Bridgecraft engineering have done that for us already a good few years ago.

[wladimir031 8]

On 8/3/2020 at 12:23 PM, B1ack_Mi16 said:

1.9 Mi16 pins are 22mm, but GTi6 are indeed smaller. I believe 20mm is correct.

GTi6 (xu10j4rs) pin is 22mm i measure today ... S16 pin is 23mm (xu10j4)

[mmt 15]

Thanks guys.

Right on the button Peter. I was counting on you to answer like that when I wrote the question :-) 

 

What did Bridgecraft find out? How much material is available? 

[welshpug 1,657]

like I said in my posts, you can add 1mm to the depth safely.

[mmt 15]

Thanks G.