Over kill or not????

[Frankin_truck]

I am wondering if I might have jumped the gun a bit. I ordered my pistons from PPE Mahle Motorsport 16.5 .020" over size. Now here is my question my block that I am using for the build is very low mileage, I have not measured the bores but if they are all with in factory spec is the there any reason I shouldn't sell my pistons and buy standard bore size pistons? Would a built motor need different clearances then a stock motor? I am doing a full build and have plans on making 1000hp with motor. Thanks for the help

 

[paint94979]

if the cylinders are good stock bore would work... considering you already have .020 overs i would run them

 

[S Phinney]

Usually cost as much to hone for surface prep as to bore so I would use them.

 

[Frankin_truck]

That's a good point. I am having a hard time finding a machine shop even some what close to me that has a torque plate for a duramax. I have talked to a few people that have got there motors bored without a torque plate. Would it be worth taking the risk?

 

[x MadMAX DIESEL]

Idk if mine had one or not. He said it did, but only done 3 duramaxs before so I don't see him having that tool really.

 

[quadracer37]

Take it to a reputable machine shop that has done duramax builds.

 

[Frankin_truck]

When they machine the block at the factory they use a torque plate. They are about $600 to buy from what I see online

 

[Frankin_truck]

Take it to a reputable machine shop that has done duramax builds.[/

That's a problem the problem, I live in Ontario Canada and I can't find any builder around here that have much experience building a duramax. Might have to take a trip to Michigan

 

[DIESELMAFIAPER.LB7]

I know people who haven't used a tq plate and one has gone 10s but if it makes you happy find someone who has one or buy one for a local shop to use

 

[THEFERMANATOR]

Find a big machine shop that has one. Call them up and see if they will rent it to you. I know there are some shops that will charge you what a new one costs, and when they get it back undamaged they will refund you most of the cost.

 

[moparkxracer]

I would not take the risk of doing it with out this deck plate.

 

[Hot COCOAL]

definitely make sure a torque plate is used and don't worry about using .020 over slugs.
most shops tend to bore over, especially for high horse power builds so they can get the bore PERFECT in every respect, least that's what I've been told.

 

[Frankin_truck]

Does any one know, If piston to cylinder wall tolerances are different for a high hp build compard to a stock bulid?

 

[JD Dave]

PM Curtis Emery and he might help you out or tell you where to go.

 

[Frankin_truck]

Does Curtis do any machine work? or just knows where to go? thanks for the help Dave

 

[quadracer37]

Does Curtis do any machine work? or just knows where to go? thanks for the help Dave

don't think he does machine work, but he has a puller and is in Canada so he may have a place to recommend..?

 

[Dirtymaxx03]

Does any one know, If piston to cylinder wall tolerances are different for a high hp build compard to a stock bulid?

What i have have gathered from my reading was that high hp motors like to be a little looser.

 

[DIESEL1]

Contact Curtis Halverson 403-805-8075

 

[JD Dave]

Does Curtis do any machine work? or just knows where to go? thanks for the help Dave

He knows where to go and has access to a torque plate. Curtis Halverson is on the other side of Canada so not really an option for Ontario.

 

[MadMaxx61]

Dirty Hooker Diesel (AKA All Season Diesel) - Owner: Tony Burkhard (989)479-0444
227 Industrial Drive
Harbor Beach, MI 48441


I think he might be the nearest one.

http://dirtyhookerdiesel.com/contact.html

http://www.duramaxdiesels.com/forum/member.php?u=874