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SD37 ??
Posted: Wed Feb 18, 2009 7:25 am
by (EST)MahviaDeTyrk
Hi
Does someone tried to build SD37 ??
I mean how about enlargening bore in block and SD25 liners in a SD33 block + SD25 pistons
Posted: Wed Feb 18, 2009 8:41 am
by stokedapollo
now thats a thought please enlighten me on it a lil more
Posted: Wed Feb 18, 2009 4:54 pm
by pongo
Bring it on, I have 2 good sd33T here spare.
Id imagine heat would be an issue though as per usual on these motors
Re: SD37 ??
Posted: Wed Feb 18, 2009 6:57 pm
by bogged
(EST)MahviaDeTyrk wrote:Hi
Does someone tried to build SD37 ??
I mean how about enlargening bore in block and SD25 liners in a SD33 block + SD25 pistons
do you mean SD27? Smaller pistons/liners wouldnt make a 33 bigger would it?
Re: SD37 ??
Posted: Wed Feb 18, 2009 7:39 pm
by chimpboy
bogged wrote:(EST)MahviaDeTyrk wrote:Hi
Does someone tried to build SD37 ??
I mean how about enlargening bore in block and SD25 liners in a SD33 block + SD25 pistons
do you mean SD27? Smaller pistons/liners wouldnt make a 33 bigger would it?
No, an SD25 is a four cylinder with a bore of 89mm and a stroke of 100mm.
SD33 is a six cylinder with a bore of 81mm and a stroke of 100mm.
So that is a fair bit of oversize really.
Re: SD37 ??
Posted: Wed Feb 18, 2009 7:42 pm
by bogged
chimpboy wrote:bogged wrote:(EST)MahviaDeTyrk wrote:Hi
Does someone tried to build SD37 ??
I mean how about enlargening bore in block and SD25 liners in a SD33 block + SD25 pistons
do you mean SD27? Smaller pistons/liners wouldnt make a 33 bigger would it?
No, an SD25 is a four cylinder with a bore of 89mm and a stroke of 100mm.
SD33 is a six cylinder with a bore of 81mm and a stroke of 100mm.
So that is a fair bit of oversize really.
kewl... yea, that is quite a difference.. is there enough meat in the block?
Re: SD37 ??
Posted: Wed Feb 18, 2009 7:59 pm
by (EST)MahviaDeTyrk
chimpboy wrote:
No, an SD25 is a four cylinder with a bore of 89mm and a stroke of 100mm.
SD33 is a six cylinder with a bore of 81mm and a stroke of 100mm.
So that is a fair bit of oversize really.
Manual says SD33 is 83x100mm - it's 3mm in radius
Posted: Wed Feb 18, 2009 8:03 pm
by stokedapollo
this is very interesting how would you go about doing it ?
Posted: Wed Feb 18, 2009 8:15 pm
by bogged
stokedapollo wrote:this is very interesting how would you go about doing it ?
buy the parts,
Pull down engine
have the old sleeves pressed out,
cylinders bored to new sleeve size,
new sleeves pressed in
Get head and crank rebuilt too = cheaper to update car.
- sounds easy.. but it never is..
Posted: Thu Feb 19, 2009 4:42 am
by (EST)MahviaDeTyrk
bogged wrote:- sounds easy.. but it never is..
Sounds easy to me too - it's the only reason i'm asking
I was hoped someone has tried it allready and ......
Posted: Thu Feb 19, 2009 8:53 am
by Tailspin
I remember reading a Stagewright column by a Bob Kotmel in Streetmachine years ago, He was talking about doing the same thing with a 308 block, resleave the motor with thickwalled sleaves and then bore it out 125 thou, combined with a 383 stroker crank would give them 400ci, I always wondered if you could do it with a 253 block seeing they have the same stroke, Gotta love street sleepers.