The B20VTEC discussion thread

**riruiz_88** · 15-08-2010 08:37 AM

^^^ hi power racing has built a b20vtec a while ago for their track car, give them a call.

but i will stilll be safe to use B16 water pump and oil pump with B18C timing belt?
i heard that all B water and oil pumps have the same teeth is this true?

**Chr1s** · 15-08-2010 10:52 AM

Yeah its fine

Any VTEC items with the longer B18 VTEC belt is all good

**raafscooter** · 16-08-2010 06:40 AM

Thanks guys, this topic is great, keep all the good info comming.
Just got myself a new engine for my car but was looking at a b20b8/vtec build..

**tinkerbell** · 16-08-2010 10:15 AM

Originally Posted by riruiz_88

but i will stilll be safe to use B16 water pump and oil pump with B18C timing belt?

yes, VTEC with VTEC & non-VTEC with non-VTEC, the answer is that the VTEC water pump has 22 tooths, and the non-VTEC has only 19 tooths.

but B16A timing belt is useless for frankies, as the B16A block is 7mm shorter than a B18C or B18/B20

i heard that all B water and oil pumps have the same teeth is this true?

no that is false. see above re. water pumps.

plus Honda oil pumps dont have teeth.

**pinoy-boi** · 26-08-2010 01:13 PM

so is it bad 2 use a 19 toothed water pump?

**riruiz_88** · 26-08-2010 02:21 PM

i have read that it is, since it has less teeth it would spin at a faster rate. but this isnt good, as it would be spinning too fast to actually pump the coolant.

**pinoy-boi** · 26-08-2010 02:25 PM

ahhh ic, ive just had my b20 rebuilt and the builder wasnt sure which water pump 2 use, im sure he said he used the 19 toothed pump. should i replace it with the 22 toothed pump?

**Chr1s** · 26-08-2010 04:18 PM

I think the question is, how hard are you going to rev?

The 19T water pump will cavitate at higher RPMs.

**GSi_PSi** · 26-08-2010 04:37 PM

why did you rebuild your motor.? wasnt it that 999automotive b20?

**string** · 26-08-2010 06:23 PM

If a B18CR spins to 8700rpm with a 22 tooth pump, a 19 tooth pump will be spinning at the same rate at 7500rpm. Are the impellers the same? No idea.

**pinoy-boi** · 27-08-2010 12:50 PM

@chr1s only revs to 8500rpm.

@gsi-psi yeh it was, (they f*cked me over though with pricing). head was f*cked and then had 2 replace some valves and then found out the block had a slight crack in it between cyl 2 & 3.. costing me 10k (crazy i know)