You`d want a minimum of 2.5" for a B20.
Manifold wise something with a 2.5" collector but it depends on how much you have to spend to be honest. Tri-Y manifolds work very well on B20`s for instance. They`re usually on American Ebay. Not sure on price.
Id go b20z over b20b, higher compression to begin with.
And IMO theres no point in a 4.9fd with a b20, as the whole point is that it has lots of torque anyway.
IIRC it is the piston design which provides high compression, the rest is the same.
With the amount of torque available, short ratios are going to be a hinderance if anything. Stock ratios are supposed to be good enough!
hye guys....
i'm planning on building b20 engine....
my current engine is b16b...
here's the stuff :
1.skunk2 pro series stage 3 cam+valve spring+retainer (complete cam stuff)
2.porting & polish head
3.CRV block with 85mm wiseco or supertek forged piston
4.h22a injector
5.Aem/toda adjustable cam pulley
6.OS Giken clutch
7.Skunk2 pro series intake
8.2.5" piping
Is there's anything that i need to add?
i need your comment on this
noted on that..thanx mr JDmarron..When getting the injectors make sure you get the saturated intectors from the facelift prelude or accord type r. The earlier ones require a a resistor box wire'd into the system. The later injectors are only 280cc tho but will do the job as that's what im using on mine.
You also need a b20 vtec conversion kit from either golden eagle or black worx racing etc.
ARP head studs
You need an ITR cam belt and tensioner, water pump and oil pump.
You would also benefit from a bigger throttle body...68 or 70mm.
Last thing..If your wanting to go with a stage 3 cam set-up your gonna have to be looking at a big CR to get the most from it...like 12.5:1
Thats all i can think of right now
Hope this helps
just copied and pasted mate