boosted hybrid

Alright i was reading a new sport compact car last night and saw a little write up that they did of eagle products. They introduced a stroker crank for both the b16a and b18b. Now the b16a would have a longer rod, actually making more rev happy then it already is...not something I would actually want. Anyway, the b18b stroker crank is increased to 95mm, meaning it has a longer rod and increases displacement to a tad under 2.0 (1996cc I believe). Now everyone knows the problem that b18b/b20's have with crappy rod/piston ratio and why when you put vtec heads on them it isnt very safe to rev them up to stock redline on vtec blocks.

So here is my idea. Buy a b18b block, get the new stoker crank and special rods from eagle and have a 2.0 with stock bore (81mm). Have the block sent out to golden eagle, sleeved and bore it to 84mm, thereby making it 2.2 liters. Drop a b16a head on it, have a good rod/piston ratio finally, add a block girdle and now you have a reliable, rev happy LS block packing some major displacement for a b-series. This block would make some serious power at low boost, i cannot even imagine the torque figures out of the engine. I would love to hear others thoughts on this matter, but I am thinking that it is totally possible and cheaper than the new Dart/Payn blocks out. I am drooling already...

boostinb18

you still dont have the oil squirters on the blocks to cool the pistons like the vtec motors...and i thought when you stroke a motor it looses high rev capabilitys?? am i mistaken?
but good idead.

2K_TEG

hmmmmmmmmm, I was thinking about getting an Eagle crank. I haven't done much research into it though. AND, my block is already on it's way back from Golden Eagle (84mm). Only downside...no B16 head for me. I am sticking non-VTEC. But, nontheless 2.2 liters would be incredible.




[Modified by 2K_TEG, 5:28 PM 7/6/2002]

Arturbo

What are the specs of the new eagle rod length and stroke?

Speed PHreak

Most aftermarket forged pistons have much better cooling properties than the stock cast pistons. You don't really need the oil squirters with a good set of rods and pistons, which you're obviously gonna have in a motor with that much work done to it. Plus the excess windage created by the oil squirters can cause power loss, albeit a minor power loss.

B20bTurbo

Any time you stroke a motor the rods will have to be shortened, or else the piston would go above the deck and smash into the head. The b18b you are talking about will be stroked to just about 2 liters, but you will get a worse r/s ratio then before, not better. The only thing you can do is get pistons with the piston compression height changed to allow a slighty larger rod to fit. With a 95mm stroke however, the piston compression height wont help that much and you will still need a longer connecting rod.

Turbo Laser

The only way to advoid the RS prob is getting a deck plate...I think that's what AEBS uses. They have 2+ liter Bs with 1.7ish RS ratios.

Arturbo

I understand, but I want the exact specs so I can have the exact r/s ratio. I have the Eagle brochere I picked up at SEMA and it only tells you the displacement. I dont want that, I want the specs which I havent been able to find. I want the specs so I can find the displacement up to 1/1000. Not that it matters but I would just like to know..

art

boosted hybrid

Yeah i cannot find any specs on the stroker crank, I guess you would have to call eagle themselves and get the specs.

I thought the rod length was increased, what is the stock rod length of the ls rod? They quoted the stroker rod length to be 95mm.

I dont know why eagle would bother to make a stroker kit for the LS if it would make the R/S even worse than it already is. With increased displacement you dont have to rev as high, depending on head, cams, etc...but still doesnt make sense to me. Oh well, it was an idea that i thought would work.

B20bTurbo

Stock Ls rods are 137.00 mm long. The b20a from the old preludes have 95.0 mm strokes also, makes me wonder if there just using those for the stroker crank. When they make those kits they pretty much just say "TURN YOUR 1.8 TO A 2.O LITER" and when people see that they say damn, I want that, i'll get more power. Which is true but it will be in the lower revs. You kinda have to know what your getting into with that kit. If low end torque is what you want then the kit would fit you nicely, but if your a spoon sports freak reving to 9k, then I would stay away from it.

hybrid901

I was talking with a engineer from Eagle the other evening and I remember he said that a b18c1 rod ratio would be around 1.52 I think. How bad of a rr could you have and still rev to 8500 safely? They arn't using old prelude cranks in there kits they have new forged cranks and you can also get them lightned for and extra $200 I think. Sounds like a fun turbo motor motor. What is the rr of a b20 or a LS?

ion_four

Too bad spoon makes a stroker kit, if I'm not mistaken

vtecvoodoo

Call Eagle and speak to alan davis. He`s a super nice guy and also a honda-tech member

Ryan

ninesecrx

By the way, you can have a longer rod and just have the pin height moved up in the piston to compinsate for that.....Mike

Eyewitness

this sounds like a very sick idea.....i hope someone builds one....

qwkteg125

i'm pretty sure that eagle's stroker crank for b18's is 95mm.

TheSwift1

ok for N/A...not for turbo applications..

B-Series Sol

That sounds like a cool idea. screw H22, we want a B22 j/k

Oh yeah, I have no (personal) idea about the oil squirters, but I have heard alot of people say that the oil squirters are not all that essential for high revving. I guess they said it had something to do with oil clinging to the cam enough that it doesnt make that much difference. Hmmm... not sure, but great idea though.

Arturbo

If thats true then that is worse than the stock b18a/b rs ratio.

So if thats the case then lets look at the displacement:
81mm x 81mm x 95mm x 3.1416= 1958.0189cc or 1.958L, so almost 2.0 liters.

Now, I dont know the length of the Rods but I need that to figure out the R/S ratio. Im sure they are gonna be somewhat shorter throwing off the R/S out of whack. But like mike said we can also move the pins on the piston to keep the rod somewhat long, but since this is a kit that is coming with crank and rods I think they will be shorter.

It will be interesting to see what eagle does and I think I might call them to find out more info.

art

hybrid901

What displacement would we have with 84.5mm bore?

B20bTurbo

Spoon Sports does make a stroker kit, still doesn't change the fact that it still lowers the r/s ratio down to 1.54 though, and for someone that wants a high reving engine thats somewhat reliable I wouldn't recoment it. The lower the r/s ratio is, the faster the piston speeds and the more wear that occurs on the cylinder walls, piston rings and lands, can't get around that, it's a fact.