Main girdle

[Traceman]

Ok, I am looking to get some measurements off of a main girdle so that I can have some made. I can get stuff made pretty reasonable usually since I write the programs and sub alot of work out to machine shops back in Alabama where I have worked. Anyway I have a few questions.

1) What is the difference between a 351 and a 302 girdle or are there any? I can not see why there would be but!

2)Is aluminum acceptable? I would use aircraft 6061 T651 probably or would 7075 be better?

I have seen different designs. Some the girdle goes to every cap bolt and some (DSS 351) the girdle goes to all the bolts but one of the main cap ones on the end. Maybe this is for clearance issues with the oil pump.

Basically I just need to come over and take the measurements. Probably wouldn't even have to take it off the motor if someone had one bolted up on an engine stand.

I hate to give 200 bucks if I can get them made for 100. LOL

Thanks for any input

[Neighbors]

Tracy: that sounds like an excellent idea! Do you write in code? Would an AutoCAD drawnig help? I have ACAD, and am willing to do the drawing if/when you find the info/parts...

Chris

The debate between aluminum and tool steel has gone back and forth for some time now (as has the benefit of a girdle), with both sides having valid points. Personally, I like the tool steel versions, but that doesn't mean an aluminum isn't as effective...

[Traceman]

Originally posted by Neighbors
Tracy: that sounds like an excellent idea! Do you write in code? Would an AutoCAD drawnig help? I have ACAD, and am willing to do the drawing if/when you find the info/parts...

Chris

The debate between aluminum and tool steel has gone back and forth for some time now (as has the benefit of a girdle), with both sides having valid points. Personally, I like the tool steel versions, but that doesn't mean an aluminum isn't as effective...


Yes I write in code. I am currently using Unigraphics which has solid modeling and such that I can use to serve my purpose but a professional drafted print would look good. I can import acad drawing's with no problems that I know of. I may get with you if I can get the dimensions.

If there is not much difference between the 302 and 351 girdles I figure I can get a batch of them made fairly reasonable.

Thanks

[Neighbors]

Well, the 351 will have to be wider (increased stroke and bigger main bearings), and if you add a stroker...

Cool on the UG! I have Acad and Inventor here at work and home; sure we could work something out collectively...

Nay!

[Traceman]

ttt

[Neighbors]

Tracy,

I have a 302 block and a 351 block here I can take measurements from (albeit crudely). I'll take bolt center to center on both (have 12", .0001" digital micrometer), and relay coordinates to you...

Chris

[Traceman]

I was thinking of taking them from a girdle itself to be able to get all the contours and clearances right. You know something someone else put all the engineering into and trial and error fitting. These will be made 800 miles away so I would like to know they will fit before they are sent out here.

Thanks NAY
Tracy

[Neighbors]

True, true; but short of buying one to copy, that's all I have now, LOL!

Might be able to 'guestimate' based on photo documentation, mock one up from an alternate material, then make a slew...

I don't know anybody that has one off-hand, but if somebody does, and is willing to 'loan' it to us for a bit, we could whip this thing out in a jiffy (I say 'we', but if you need anything, my part is small, LOL! If they need secondary ops (machining), I might have a Bridgeport available...)

Chris