I have a complete B17A1 in my garage. I'm about to pick up a B20B bare block that has GEM Sleeves in it. I'm not quite sure what to do....

My original plans were to resleeve the B17, take it to 85mm and build the bottom end to rev to 9,500 rpms so that I could use Toda B's. I piced up the B20B because it was a great deal that I could not pass up.

Here is what I'm not sure of. I still want to be able to take the block past 9,000 rpms so that I can use some high lift cams, Toda, Jun....somehing. Because of this I'm thinking of putting my B17 Crank in the 85mm B20B an having 1,847ccs that have a great R/S ratio. But if I'm going to do that then why not just stick with the B17, relseeve it and have about the same size? I'm really not sure what Rods to use with the B20B/B17 Crank combo.

The other option is to put the stock B20B bottom end in and only rev to 8,600 with some different cams.

I've seen the thread of Mike M, K, Q, #, % 's dyno chart of his B20B with the B17 Crank and it is impressive. I'm just not sure If I can do the same thing with a resleeved B17.

Am I even making sence at this point?

-Steve

 

if you have the money to spend for custom rod, try to use the longest deck height available and therefore longest rod length, so the GSR/Type R B18c blocks have the longest deck of allt he b-series including the LS/CRV, use the B17 crank and get custom rod. If you want to, the b20 will also make good torque but fall off hgih rpm with the stock ls/crv 89mm crank.

Greg

 

The reason I'd go with a B17 crank in the B20 block with custom rods would be because that set up would give me a really good R/S ratio. If I use long azz rods, wont that mess that all up?

 

I think what vtec4gs meant was you could fit a slightly longer rod in a B18C due to the extra deck height. Deck height on B18C's is 8.362", tallest of all bseries. Because the deck is taller you can use an even longer rod than you could in the B17A(8.2"). I'd go with the B20 block(8.340"), with 140.41mm(5.527") custom rods, B17A crank, for a 1.73/1 r/s ratio. Basically an overgrown B16A.

 

I forget how long my rods were exactly, but they were B17A rods, 6.9mm longer center to center, made by Crower.

I don't have a dyno sheet handy.. but it's 85mm x 81.4mm like you're talking about, and I'm at 212.8/143.0 at the wheels. This is w/ Jun stage 2 cams and Hondata tuning.

 

Mike,
Which block did you use?

 

Mike K, I'd really like to start a discussion with you on my build options. If you have the time and patience, could you email me at dayuiz@hotmail.com please?

AIM: DAYUIZi
Yahoo: dayuiz

-Steve