My current setup is a b18c that consists of a std. 81 mm bore with arias 12.8:1 cr pistons. I am looking into tearing it down and restarting once again so I am needing some help for my fellow honda-tech ers. I am almost set on running an 85 mm bore no matter what and have yet to decide on where to send my block to or what sleeves to run. The only place I have looked was at Atomicspeedware.com with their Darton sleeving. But anyways Help me out guys.

As far as the high compression side, it would be a 85mm bore with the std. 87.2mm stroke gsr crank with 13.7:1 compression ratio pistons.

If I was to go stroker, I have been considering the 85mm bore with the std. 89mm stroke ls crankshaft with je 12.0:1 CR pistons w/ custom rods.

What would build more power?
What would have the best gains?

Help me out guys...

 

If you are getting it sleeved and putting money in that then you should throw in a 95mm crank or something along those lines. I would rather have more displacement.

 

How will the engine be used?

I'd do the high comp setup for a race engine, and the stroker for a street engine.

Assuming comparable VE curves (which is a HUGE assumption), the exta displacement will flow 2% more air. The increase in compression is good for 3%, based on thermal efficiency.

 

I am building the car for race purposes only.

And on another note, is there any gains when eliminating the oil squirters from the block? I know they aren't really needed when running forged pistons.

 

Check out ERL Performance for getting a sleeved block.

 

If you're building a drag or high RPM motor, I'd go for the higher compression. Don't forget if do decide to stroke, that a 12:1 piston at 87mm stroke will yield a slightly higher CR at 89mm stroke.

 

its depends if you plan on running strickly race gas or pump and daily drive it...

I'm doing 85mm x 89mm sleeved LS Block

 

Thats a good statement... I'm running 12.5:1 compression Mahle pistons but I'm also opening up my combustion chambers up to 85mm and running the factory 3 layer head gasket.... My block isnt milled and is still a virgin...

 

i would go for the high comp setup

 

Why is it an either/or question if its a race motor?

 

I asked if it's a race engine just because 13.7:1 is a little high for pump gas. I'm not saying it can't be done, but I think it's a little excessive for a street car.

 

For a street motor, you tend to want the low-end torque that a stroker gives you. For a high RPM race engine, the higher compression will yield a better combination with big cams. The stroker motor is also arguably less reliable spending a bunch of time at high RPM's. And yeah, 13:1+ CR on pump gas is hard to do; you'd likely end up pulling a bunch of timing to make it work and losing out on some power.

 

95mm stroke x 85mm bore. 11.5:1 if you are running pump gas. Higher if you plan on running race gas. You will need the supporting mods to get the most out of your engine, as well as a good tune.

 

he isnt lying. there is something about this combo, and im guessing its the increased rotational weight, that makes its output less than suprising. you would thing that the power increase would be proportionate to displacement increease but i just dont think it is. there seems to be a sweet spot for the B, in conjunction with the mass produced parts available that is about 85x89. anything over that, and everything needs to be custom fabricated for that specific displacment/head/piston ect ect.

dollar for hosepower nothing beats the traditional rs pistons on stock rods 84.5x89mm B series with headwork.

 

I have a JG engine dynamics pro series head with a set of skunk2 pro 3+ cams in the car right now and am about to switch from a intake manifold setup to itb's.

As for fuel, just running the car as is now, its on a 50/50 mix (VP110 + 93), 5 gallons of each. I am running 2 sets colder on the plugs also. This altitude in the middle of the states is not very favorable. But running straight race fuel doesn't bother me, the car barely likes to idle so it doesn't go on the streets.

 

These are the only two posts that make any sense.

If its for racing then bore, stroke, and raise the compression. 85+ and 95 mm crank is where its at for the B-series.

 

What pistons and rods would I use with a 95mm crank in my gsr?

 

you can use off the shelf LS length rods and custom pistons. there are a lot of companies that make that combo.

 

So I went ahead a did a little bit of research and found a little bit...

Brian Crower makes a series of stroker kits for the b series one including the 95mm stroke crank making a B18C from the 1.8L to a 2.2L. With this kit, you have several choices... from lightweight crankshafts (27 lbs) to forged steel cranks (34 lbs). Along with the crankshaft you get a set of Econo rods and your choice of compression CP pistons. The kit also comes with std. bearing and misc. equipment. All that for around $2100.

So would this be an ideal thing to look into for all out power? Would I be able to run my S2 Pro 3+ cams or would it be ideal to run their camshafts? What do you guys think?

 

i am running a crower stroker kit. not quite your setup but i am running 81.5 with 89 stroke with a 11.5.1 compression with crower stage 2 cams. i love there cams so far.

 

im running the bc stroker kit on my h 2.2l to 2.5 with s2 pro2+'s just to break the motor in and then imma throw my pro 3+'s in and find out what i have with 12:5:1 cr giving me a little over 13 cr and man i gotta tell you i love that feel..

 

Yeah I would run the skunk pro3 assuming you have the flow to match from the head. And of course you go with high compression.

 

idk if this was mentions before but make sure to do a port and polish and upgrade the valvetrain...

 

What?

 

lol my bad i was typing to fast and not really reading what i was writing down.. i meant to say imma throw my pro3+s in when all the break down period is done with my motor but the cr i ordered for my bc stroker kit was 12:5:1 and when i went to the dyno they said i was a little over 13 cr. my bad for the inconvenience should have reread what i typed