I searched on this topic and didnt find too much info.
I have a GE sleeved C5 block which I will be building for a turbo application and I also have a B20a crank lying around so I was curious if anyone had done this with custom rods and pistons before?
This is assuming the crank is totally balanced.

scott

 

without a raised deck its not a good idea.

 

I know quite a few people who use the ls (b18a/b) crank in a b-series vtec block. Basically an ls vtec without the external oil line and what not.


[Modified by vtecvoodoo, 3:26 PM 3/3/2003]

 

Why is it not a good idea? r/s ratio?

scott

 

b20a is not LS. b20b/z is

yeah, im normally not one to scream r:s ratio, but it would be horridly low without
using a longer rod

 

I wasn`t trying to say it was. I was referring to b18a/b crank, y0

 

I have heard that Eagle makes rods and pistons for this application so I would aquire these.

scott

 

The reason that this isn't a good idea, is because the stroker crank will force you to use pistons with a raised ring package. This will make your ring lands very thin and weaker. Now, for All-Motor...it wouldn't be a terrible idea, but for Turbo...I wouldnt recommend it. Solution: Sell me that crank for $100.

Suprdave

 

95 mm stroke?

With an ~85 mm bore?

Yikes! I don't think the B-series head would flow well enough to support 2.2 litres of displacement.

 

Ha, $100? How about $200? With all the blood and sweat that went into me pulling this thing at the Junkyard I should sell it for $1000 .

scott

 

Dayum Scooter, wtf are you doing now? keep dat chit up and bring it to Expo

 

Would LS size aftermarkett rods be sufficient for this?

I've been thinking about doing this as well for an all motor project.

 

LS rods would work. I have found out that it does put undue stress on the rings, pistons and sleeves causing them to wear out mucho prematurly. The ratio would be somewhere in the 1.44 range wich is too low for my application. If you had a deck plate or a B20b/z block it would work good.

scott

 

Trying to go faster everyday..... I would be at the Expo in a heartbeat if it was closer...maybe next year....SEBRING anyone?????

scott

 

a bunch of us crackers are going to Sebring in a couple weeks - I heard something about 30 bucks and RealTime will be there

 

ya, 12 hours is comming 12th-14th. Chinmotorsports event is the 29th. I am gonng try to make both.

scott

 

probably see yo **** there then

 

I will let you know how the B-series head breathes when I put my setup together in a few weeks.

 

How much will your setup displace?

It will be interesting to see. Something to keep in mind is the B-series VTEC head was essentially designed for a 1600 cc engine with an 81 mm bore. A head designed for a larger bore can use larger ports and more valve area, something Honda took into consideration when designing the K-series heads.

 

the limiting factor here i think is valve size.
Due to valve angle, we are limited to stock size valves in order to run cams
large enough to feed a 2L sufficiently. I would like to win the lottery so I
could customize a cylinder head to my specs.

 

I'D LIKE TO WIN THE LOTTERY TO BUY ONE OF YOUR CYLINDER HEADS.

 

If I won the Lotto, I'd also have some custom 4.0 litre blocks cast (they'd have twice as many cylinders ), as well as custom-forged flat-plane cranks and the aforementioned cylinder heads. Guess I'd need some kind of custom-fabricated intake manifold, too.

Forged aluminium suspension arms would be nice, too.

I could go on and on and on...