The B20VTEC discussion thread

[zeni-tani]

@chr1s and todaau: what preperations apart from acid washing, apply multi angle valve job, replace valve stem seals and shaving would you need to be done, and what is the ideal PTV clearance on b18c2 head with stock cams.

I know the PTV will also depend on what piston is used however from experience what is safe and ideal?

[riruiz_88]

what is a PTV by the way?

what headers would you use, B18C or B16A? because i have heard B18C headers dont clear on B16A. so i thought it would be similar for the B20

[tinkerbell]

what headers would you use, B18C or B16A? because i have heard B18C headers dont clear on B16A. so i thought it would be similar for the B20

maybe you got it backwards... please check your information source.

[tinkerbell]

and what is the ideal PTV clearance on b18c2 head with stock cams.

approx. 50 thou

[zeni-tani]

what is a PTV by the way?

what headers would you use, B18C or B16A? because i have heard B18C headers dont clear on B16A. so i thought it would be similar for the B20

piston to valve clearance

[zeni-tani]

5 thou

both intake and exhaust cams? this is obviously measured when by locking the vtec in.

[tinkerbell]

both intake and exhaust cams? this is obviously measured when by locking the vtec in.

0.05 is a rough guide.

if you are a lot (like 0.02) inside this then you should reconsider the parts you are using...

clay it with the cam gears at max and min advance/retard too...

NB - you also should consider rod stretch too...

[zeni-tani]

0.05 is a rough guide.

if you are a lot (like 0.02) inside this then you should reconsider the parts you are using...

clay it with the cam gears at max and min advance/retard too...

NB - you also should consider rod stretch too...

Yes as expected i have done this before but not on a honda. Thats a good starting point, ill add in my notes i just purchased some RS machine pistons for it just going to be a simple build nothing to hectic.

I also never realised having a B18C2 head is a pain the ass to get manifold, i was planning on B16A manifold/OEM type R but stud pattern is diffrent, No i wish not to modify stuff to make it fit so the only choice i have i guess is a skunk or a blox.

[tinkerbell]

you should try it with the dual runner first - it might work well

[zeni-tani]

you should try it with the dual runner first - it might work well

The DC2 VTIR manifold?? I dont have a manifold to start with and having to work on 2 DC2 VTIR its a pain in the ass to work with.

[MikeyG]

Standard manifold works well but yeah only problem with b18c head is the lack of manifolds. But they more compression then a b16a head

[zeni-tani]

Standard manifold works well but yeah only problem with b18c head is the lack of manifolds. But they more compression then a b16a head

lol i dont doubt that, however i want to get a manifold where i can get my fat little fingers around! Specially with that pain in the ass rear engine mount. I might end up getting a blox.

i want to know toda au and chr1s input on this too please