rebuilding a 295 robbin question

rangerboy · 01-04-2013, 12:05 PM

iv got a early 94 295 robbin and im looking to do a rebuild befor things get bad.My question is that i would like to beef it up a touch ,can i bore out the cylinders to a 350 piston ? will it work with the deck height that is their are they the same as a 295 just bigger around? also how much could i deck the head?before it messes with timinig or valve clearance.

rvkersh · 01-05-2013, 06:44 AM

The 350 pistons will not work with the 295 crank. Both engines have the same deck height but different stroke. With the 295 crank the 350 pistons will not come flush to the deck as they do stock because the wrist pin location is closer to the top on the 350 piston. There is both a bore and stoke difference.

worqhors · 01-05-2013, 09:14 AM

How about using a 350 crank then? The connecting rods are interchangeable, ain't they?

rvkersh · 01-05-2013, 02:39 PM

Rods are the same. Crank is expensive but if you've got it spend it,it will work.

rangerboy · 01-05-2013, 04:07 PM

Ok so blocks are different then to accommodate 350 pistons because of the placement of the wrist pin. Would i start with a 350 block and crank then and use my 295 head?

scottyb · 01-05-2013, 04:22 PM

yes, you could but but remember you are working with an engine that does not have a crank caps or bearings. It is basically a throwaway motor. Not a good candidate for increased compression in my opinion.

rvkersh · 01-05-2013, 04:26 PM

You can bore the 295 block to fit the std. 350 pistons,there is plenty of sleeve in there but no room for overbore after you wear it out. It takes a long time to wear out a well maintained robbin engine. I have done this mod. using the 295 head, it works out well.

rangerboy · 01-05-2013, 05:15 PM

So the 350 piston will work,the wrist pin location does not effect it?

rvkersh · 01-05-2013, 08:28 PM

350 pistons will work with a 350 crank only. If you want a 350 buy one, if you want to build one from a 295 you need both the pistons and the crank.

rangerboy · 01-06-2013, 12:29 PM

Ok thanks for the clarifying this for me.

01-04-2013, 12:05 PM	#1
rangerboy Getting Wild Join Date: Aug 2009 Location: newaygo MI Posts: 99	rebuilding a 295 robbin question iv got a early 94 295 robbin and im looking to do a rebuild befor things get bad.My question is that i would like to beef it up a touch ,can i bore out the cylinders to a 350 piston ? will it work with the deck height that is their are they the same as a 295 just bigger around? also how much could i deck the head?before it messes with timinig or valve clearance.

01-05-2013, 06:44 AM	#2
rvkersh Gone Wild Join Date: Apr 2012 Location: Dansville, NY Posts: 396	Re: rebuilding a 295 robbin question The 350 pistons will not work with the 295 crank. Both engines have the same deck height but different stroke. With the 295 crank the 350 pistons will not come flush to the deck as they do stock because the wrist pin location is closer to the top on the 350 piston. There is both a bore and stoke difference.

01-05-2013, 09:14 AM	#3
worqhors Gone Wild Join Date: May 2011 Location: Las Vegas NV Posts: 330	Re: rebuilding a 295 robbin question How about using a 350 crank then? The connecting rods are interchangeable, ain't they?

01-05-2013, 02:39 PM	#4
rvkersh Gone Wild Join Date: Apr 2012 Location: Dansville, NY Posts: 396	Re: rebuilding a 295 robbin question Rods are the same. Crank is expensive but if you've got it spend it,it will work.

01-05-2013, 04:07 PM	#5
rangerboy Getting Wild Join Date: Aug 2009 Location: newaygo MI Posts: 99	Re: rebuilding a 295 robbin question Ok so blocks are different then to accommodate 350 pistons because of the placement of the wrist pin. Would i start with a 350 block and crank then and use my 295 head?

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01-05-2013, 04:22 PM	#6
scottyb Happy Carting Join Date: Dec 2007 Location: Southern California Posts: 73,418	Re: rebuilding a 295 robbin question yes, you could but but remember you are working with an engine that does not have a crank caps or bearings. It is basically a throwaway motor. Not a good candidate for increased compression in my opinion.

01-05-2013, 04:26 PM	#7
rvkersh Gone Wild Join Date: Apr 2012 Location: Dansville, NY Posts: 396	Re: rebuilding a 295 robbin question You can bore the 295 block to fit the std. 350 pistons,there is plenty of sleeve in there but no room for overbore after you wear it out. It takes a long time to wear out a well maintained robbin engine. I have done this mod. using the 295 head, it works out well.

01-05-2013, 05:15 PM	#8
rangerboy Getting Wild Join Date: Aug 2009 Location: newaygo MI Posts: 99	Re: rebuilding a 295 robbin question So the 350 piston will work,the wrist pin location does not effect it?

01-05-2013, 08:28 PM	#9
rvkersh Gone Wild Join Date: Apr 2012 Location: Dansville, NY Posts: 396	Re: rebuilding a 295 robbin question 350 pistons will work with a 350 crank only. If you want a 350 buy one, if you want to build one from a 295 you need both the pistons and the crank.

01-06-2013, 12:29 PM	#10
rangerboy Getting Wild Join Date: Aug 2009 Location: newaygo MI Posts: 99	Re: rebuilding a 295 robbin question Ok thanks for the clarifying this for me.

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