1987 88 spl vs 1993 115 question

[logcruiser]

My 115 seems to be worn out and looks like all the cylinders would need to be bored and new pistons needed. I have an 88 SPL that has aluminum in cylinder from piston but all others just need honed.

Can I rebuild the 88 block (much cheeper 1 piston 1 boring vs all 4 on the 115) and use the heads and carbs and bubble back from the 115 to have the same HP?

Not using VRO so would the block mounted 88 fuel pump be enough?

Will this work? If so I can run the 115 till it goes......

Thanks,
Mike

 

[ezeke]

Re: 1987 88 spl vs 1993 115 question

It will work, but won't be the same due to the porting. You can swap most of the parts including the exhaust covers. Take one of the bypass covers off each motor and mic the ports - you will see the difference.

If you are having machine work done, you might consider having the ports done at that time.

 

[logcruiser]

Re: 1987 88 spl vs 1993 115 question

will it cost more to have the ports machined than to do the 115 rebuild?

 

[ezeke]

Re: 1987 88 spl vs 1993 115 question

If the shop is set up to do the work, it should not cost that much to redo the ports since you need the hole bored anyway. You will at least want the other holes checked.

If it were mine, I think that I would do the 115 and sell the 90 as is so that you don't have fool with the exhaust.

 

[ezeke]

Re: 1987 88 spl vs 1993 115 question

Not my trade. My guy does 4 holes for 200 to 250, but I have to do all of the tear-down first. He has to dress the ports anyway after boring so the resizing of the ports is just drill work and alignment. You have both blocks so it would not be hard to get an estimate for each one if you have them torn down.