b20v first motor build

ASSISTANCE Hybrids & Advanced Aftermarket Engine Performance
1

Okay so this is my first motor build amd I’m making this hopeing to just fet some tips or opinions from people.
First to start I have a b20b block and came across a type r head and completely rebuilt type r trans! Beyond stoked. I’m doing all motor 13:1 was gonna do 12:1 then 12:5 my friemds keep talking me into more comp lol, pretty much I’m building the car for track it might not see to much track mainly street amd as much track as possible.

My questions would be

  1. What pistons should I use or do you suggest I was thinking supertech. I don’t wanna shave the head or deck the block.
  2. What cams does would be good or best?
  3. What rods?

Also Im gonna get the crank balanced for 10k and bore the block to 84.5 and replace all internals but the crank for 0 miles. Would oem bearings work fine?

I’m sure there’s questions I forgot amd sorry for this being kinda all over the place just looking to get opinions amd some advice

Please no hate or trash talk

2

Unless your going to run race fuel all the time, I would stick to about 11.8:1.

3

Why’s that

4

I have a B17 running 12.4:1 I just had it tuned again and they had to pull a lot of timing in the top end because of detonation. I am about 6 degrees back of factory timing on the top end. It is also a little easier on the engine running a little lower. That is with a skunk 2 stage 2 cam. I wouldn’t lose any power with lower compression because they could advance the timing more.

5

What kind of track do you plan on hithitting? 1/4 mile? Road course, AutoX? Building your car for a track that you do 20% of your driving on, is not the best idea… So don’t go all hog wild and realise you do more street driving than you had anticipated.

I’d go with RS Machine pistons or some JE pistons. Go with a product that has a a lot of good feedback from the Honda community.

And not to be a prick, but don’t listen to your friends on what parts or what compression to use if their only reasoning is “moar powur”! You need to select products that are meant to work together to achievethe goal you’re wanting…

I agree, I’d stick closer to 11.5:1. You need to have a REALLY good tuner, not to mention full race gas to run 12+:1. And the power you’ll see is not nearly what you’d think. The wheel horsepower difference from 11:1 to 12:1 (on a mild motor) would be 5whp, maybe? Not worth the hassle that comes with upping the compression that high.

As far as cams… you need a good amount of compression to run Skunk Tuner2 or Pro2 cams, 12+… I’d honestly run a Tuner1 as well as the upgraded valvetrain to match whatever cams you run.

Rods are prettymuch endless… tons of options out there. I myself run Brian Crower rods. I’ve had good experience with Crower as well… many people vouch for Eagle rods, but I personally am not a huge fan.

If you were using a stock, cast piston, you could use your stock rods and be perfectly fine… but with aftermarket pistons, I’d pick up a set of rods too.

Then, you’ll want ARP fasteners for the cylinder head, main crank caps and rods… if you expect to rev that B20 higher than stock redline, you NEED these fasteners.

Going with the B20 is a sketchy route… the sleeves are iffy and there is no telling how long they will last. The more abuse you put on them (high compression, excessive redline, etc) the more chance you have of a potential issue.

6

Thamks guys for the responses and road course/auto x it’ll just see more street unfortunately. But I was thinkimg about sleeving it I’d rsther not if I don’t have to I’ve read other multiple build threads amd kinda only got the idea that theyr only needed with boost. Butbsince I don’t really plan on being easy on it I would feel safer with them do you think its necessary?

7

I mean, the block would be more “bullet proof” with sleeves… but it is not completely necessary.

It just seems like there are so many mixed reviews about the B20 and what it can handle in stock form. Some people have had great results, some not so much.

8

Yeah pretty much!

9

will oem bearings work? and does anyone know if i need to get a vtec water pump

10

If you’re using a vtec head, use a vtec timing belt and water pump.

OEM bearings will work, depending on the machine work.