Alex. A New Member 8 Member For: 4y 8m 15d Gender: Male Location: Brisbane Posted 14/05/20 12:08 AM Share Posted 14/05/20 12:08 AM Howdy guys, Just curious if anyone here is using ross forgies in their xr6t? After first hand experience with noise etc? Due to them being a 2168 type forging and requiring more ptw clearance then 4032 pistons.. curious if there is any cold noise and if they get a little better once up to temp? Was listening to a mates built barra with Ross slugs and u could hear them. Cheers fellas Link to comment Share on other sites More sharing options...
camo86T Silver Donating Members 1,810 Member For: 10y 9m 15d Gender: Male Location: SW Sydney Posted 14/05/20 12:49 AM Share Posted 14/05/20 12:49 AM @gaz097 is Link to comment Share on other sites More sharing options...
gaz097 Bronze Donating Members 1,751 Member For: 13y 4m 6d Posted 14/05/20 01:21 AM Share Posted 14/05/20 01:21 AM Rattly Ross's. Yeah they rattle quite bad when cold. Once warm there fine. 1 Link to comment Share on other sites More sharing options...
Alex. A New Member 8 Member For: 4y 8m 15d Gender: Male Location: Brisbane Posted 14/05/20 02:56 AM Author Share Posted 14/05/20 02:56 AM Yeah very loud.. do you know what you recommended piston clearance was with them? I inquired with Ross and the recommended. 006" for small bore turbo applications.... sweet jesus that's some clearance. Link to comment Share on other sites More sharing options...
Fischer89 New Member 21 Member For: 7y 2m 16d Posted 08/07/20 01:06 PM Share Posted 08/07/20 01:06 PM Sorry to bring this thread up again but I've searched and searched. Currently in the middle of a build and have the STD size Ross Racing pistons. Skirt clearance is good and in spec but the crown clearance looks to be almost 1mm in the bore.. Is this normal? Link to comment Share on other sites More sharing options...
k31th less WHY; more WOT Site Developer 28,997 Member For: 16y 7m 17d Gender: Male Location: Melbourne Posted 08/07/20 01:22 PM Share Posted 08/07/20 01:22 PM talk to you the piston manufacturer to check on the spec, but 1mm seems way too big. Link to comment Share on other sites More sharing options...
Fischer89 New Member 21 Member For: 7y 2m 16d Posted 08/07/20 01:25 PM Share Posted 08/07/20 01:25 PM I tried and basically got a generic response saying they don't know about barra engines as they are an american based company Link to comment Share on other sites More sharing options...
Puffwagon Puff Gold Donating Members 15,913 Member For: 9y 9m 29d Gender: Male Location: South Australia Posted 08/07/20 01:31 PM Share Posted 08/07/20 01:31 PM Yes the crown clearance is normal. You don't measure a piston there. Link to comment Share on other sites More sharing options...
Fischer89 New Member 21 Member For: 7y 2m 16d Posted 08/07/20 01:34 PM Share Posted 08/07/20 01:34 PM Thanks Puff just double checking.. I know they expand but wow they are gonna be noisy when cold with that type of slop in the bore Link to comment Share on other sites More sharing options...
Puffwagon Puff Gold Donating Members 15,913 Member For: 9y 9m 29d Gender: Male Location: South Australia Posted 08/07/20 01:40 PM Share Posted 08/07/20 01:40 PM Yeah they'll be noisy at start up. When you're flogging the crap out of it, they'll be a perfect fit. That's what they're made for. Just take it easy until operating temp so they don't scuff the bore. Link to comment Share on other sites More sharing options...
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