MoltoMario Posted August 22, 2009 Report Share Posted August 22, 2009 Hey guys I recently bought a 12a and it had a TD05h exhaust wheel on it. Basically the exhaust wheel will not fit in a stock 12A exhaust housing so I need to bore the housing out. What I need to know is about what clearance should there be between the exhaust wheel and the housing? The Machine shop Im taking the housing to, to bore it out wants to know the clearance they should leave between the 2 Thanks Ciao -Mario Link to comment Share on other sites More sharing options...
ragdoll_unlimited Posted August 22, 2009 Report Share Posted August 22, 2009 i would say 5-6 ten thousands of an inch. thats leaves a little wiggle room if something were to fail. Link to comment Share on other sites More sharing options...
89PalermoSHP Posted August 22, 2009 Report Share Posted August 22, 2009 .0005-.0006? i highly doubt that. Link to comment Share on other sites More sharing options...
MoltoMario Posted August 22, 2009 Author Report Share Posted August 22, 2009 Well what do you guys think then? I have no idea :confused0024: Link to comment Share on other sites More sharing options...
ragdoll_unlimited Posted August 22, 2009 Report Share Posted August 22, 2009 um yeah, thats right, ill even go mic it out right now. the most you want is 1mm but thats gonna cause lag, but you can have it at 5-6 thousands and it should be fine... Link to comment Share on other sites More sharing options...
Maxzillian Posted August 23, 2009 Report Share Posted August 23, 2009 (edited) If I remember right, I usually give the compressor wheel about .040-.060" total clearance based off measurements from a stock turbo. Anything under .010 is going to touch for sure. With a bushing turbo, the shaft has a fair amount of wiggle room and it won't stay perfectly centered while spinning. Edit: I tried looking for the old cnc file from when I did a compressor housing for a 14G, but I can't find it. I don't have a turbo readily available so I can't check clearances for sure. Edited August 23, 2009 by Maxzillian Link to comment Share on other sites More sharing options...
89PalermoSHP Posted August 23, 2009 Report Share Posted August 23, 2009 i would say 5-6 ten thousands of an inch is a long way from but you can have it at 5-6 thousands and it should be fine... Link to comment Share on other sites More sharing options...
Maxzillian Posted August 23, 2009 Report Share Posted August 23, 2009 (edited) Just a little example of size. A piece of construction paper is about .005" thick. 1mm is .039". Edited August 23, 2009 by Maxzillian Link to comment Share on other sites More sharing options...
Scotty Dont Posted August 23, 2009 Report Share Posted August 23, 2009 Mario, how much is the machine shop going to cost you? I believe you said $120....for that kind of money you could get a good complete 12a on here. Or just get a 14b and remake your down pipe. Link to comment Share on other sites More sharing options...
ragdoll_unlimited Posted August 23, 2009 Report Share Posted August 23, 2009 sorry i was off. i just went back to the machine shop that i did a test on and im sorry i had the wrong info. it should be 5-6 thousands within 1.5mm. like i said im very sorry about the wrong info and hope that the update is more informal... Link to comment Share on other sites More sharing options...
Maxzillian Posted August 23, 2009 Report Share Posted August 23, 2009 sorry i was off. i just went back to the machine shop that i did a test on and im sorry i had the wrong info. it should be 5-6 thousands within 1.5mm. like i said im very sorry about the wrong info and hope that the update is more informal... So to put that into a range of measure, that'd be .054-.064" or 1.4-1.6mm. That sounds about right to me. Certainly follows with what I've measured on the compressor side of turbos. Link to comment Share on other sites More sharing options...
automech01 Posted October 11, 2009 Report Share Posted October 11, 2009 give tims turbos a call Toll-Free: 1-866-3TURBOS thay can do it for you and or give you the specs, real cool guy. Link to comment Share on other sites More sharing options...
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