Long story short.. A friend of mines' B17 may need a new crank (nonmachinable). Since the 1.7L stroke comes from the use of a different crank/rod setup than a B16, would he be able to use a B16 crank and B17 rods, only slightly reducing the stroke.. Or would he have to use B16 rods as well? And, what would the stroke end up being if he indeed did use a B16 crank with B17 rods? 1.65L? lol.. but seriously, any insight would be appreciated.

 

i dont have information you would have to search for the diameter of the crank rod bearings and if they are within diameter of connecting rod big end, then you can always order a set of bushings to make it fit...

about dissplacment i don't think you should tear apart your engine if your asking that... an increase of 1000 mm rod length won't increase ***** on your dissplacment.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by overrev_it &raquo;</TD></TR><TR><TD CLASS="quote">i dont have information you would have to search for the diameter of the crank rod bearings and if they are within diameter of connecting rod big end, then you can always order a set of bushings to make it fit...

about dissplacment i don't think you should tear apart your engine if your asking that... an increase of 1000 mm rod length won't increase ***** on your dissplacment.</TD></TR></TABLE>

are you serious, stroking is fairly common way to increase displacement, if a piston dwells further down obviously it will have more displacement...

 

b16 crank must use b16 rods in taht motor

 

theoreticly it will increase cylinder cc, but so as low compression pistons as they allow more combustion chamber volume, but this won't control stroke... stroke length is determined by the crankshaft main bearing diameter, it won't matter what rod length you use....

1mm decrease in rod length can drop above 3 points of compression on a b16.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by overrev_it &raquo;</TD></TR><TR><TD CLASS="quote">theoreticly it will increase cylinder cc, but so as low compression pistons as they allow more combustion chamber volume, but this won't control stroke... stroke length is determined by the crankshaft main bearing diameter, it won't matter what rod length you use....

1mm decrease in rod length can drop above 3 points of compression on a b16.</TD></TR></TABLE>

I belivie that the stroke is determined by how far the rod journals are offset of the centerline (ie, the mainbearings) The main bearings don't not have opne thing to do with stroke. They are the center point of every motor ever built. It doesn't matter if the main bearing is 5 inches or 100 inches in diameter, it is still gonna spin in place while the ROD JOURNALS spin around that axis point.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by overrev_it &raquo;</TD></TR><TR><TD CLASS="quote">theoreticly it will increase cylinder cc, but so as low compression pistons as they allow more combustion chamber volume, but this won't control stroke... stroke length is determined by the crankshaft main bearing diameter, it won't matter what rod length you use....

1mm decrease in rod length can drop above 3 points of compression on a b16.</TD></TR></TABLE>

who let this guy on HT.

all b series main bearings are the same btw. only rod journal bearings are different sizes

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by unified112 &raquo;</TD></TR><TR><TD CLASS="quote">Long story short.. A friend of mines' B17 may need a new crank (nonmachinable). Since the 1.7L stroke comes from the use of a different crank/rod setup than a B16, would he be able to use a B16 crank and B17 rods, only slightly reducing the stroke.. Or would he have to use B16 rods as well? And, what would the stroke end up being if he indeed did use a B16 crank with B17 rods? 1.65L? lol.. but seriously, any insight would be appreciated.</TD></TR></TABLE>

The b16 and b17 blocks are identical in size. The difference is the crank and rods. The pistons are different but still interchangeable. You can use the b16 crank and rods in the b17 block. I would suggest using the b16 pistons as well considering the b17's already low compression. By using the b16 rods you will lower the compression ratio even more if you stick with the b17 pistons.

 

well i apologize to everyone who have red my post and got misleaded appearentley you are right about it not controling stroke mainly my message was that the connecting rod length was no variable to control stroke, you are right diamter doesn't change anything... it's the length between the main bearing center and the rod journals center that counts!!

srry 4 the confusion

 

turbociv910 a person never stops learning, good information you posted, really.

 

notta problem

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by turbociv910 &raquo;</TD></TR><TR><TD CLASS="quote">

who let this guy on HT.

all b series main bearings are the same btw. only rod journal bearings are different sizes</TD></TR></TABLE>

On a side note.. If they are indeed all the same, could one use oem GSR Tri-Metal main bearings in a LS?

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by unified112 &raquo;</TD></TR><TR><TD CLASS="quote">

On a side note.. If they are indeed all the same, could one use oem GSR Tri-Metal main bearings in a LS?</TD></TR></TABLE>

why would you? i believe the b18c bearings are wider

 

Well, aren't Tri-Metal bearings more durable than the regular non-vtec bearings?

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by nate_2k5 &raquo;</TD></TR><TR><TD CLASS="quote">

why would you? i believe the b18c bearings are wider</TD></TR></TABLE>

I also believe the gsr bearings a slimmer to help with friction loss

all b-series main bearings are the same Pr3 part number i believe, all also being tri-metal.