So ive finally got everything for my b20vtec build. This drivetrain will be going into a 96 ej8 coupe. All im waiting on now is my engine builder. Lmk what you guys think of my setup and what kind of numbers it make.

B20b block bored to 84.5
RS machine itr pistons
Stock rods
Arp rod bolts
Acl race bearings
Itr water/oil pumps and belt
Gsr head ported, polished, milled, 3angle
Skunk2 pro series valve train
Skunk2 Pro 3 cams
Skunk2 Intake mani port matched
Skunk2 alpha series 70mm throttle body
Custom 3" intake with velocity stack no filter
Aem fuel rail/pressure regulator
550cc SFI injectors
Custom SMSP big tube header (originally built for mike lindquist, from king motorsport)
The tranny being used is a jdm type r with 4.7 final drive
Will be tuned on hondata s300v3

I think thats just about everything. I will be running pump 93. Car will be used as a street beast/weekend warrior and will see some track days. Im also open to suggestions on what tire to run. Thanks.

 

Car won't make over 220whp on 93.

Which intake manifold?

 

I have to disagree with you on that, ive seen plenty of b20v's making over 220whp on 93.. And the pro series intake manifold.

 

#churchesdyno 220+

 

Do you think u have the piston to valve clearance for the pro 3? Good luck and let us know what it made thanks.

 

I made 230/165 on 93 pump. 84.5mm B20v
12:1 CPs, Manley rods, B20 crank, 4Piston CNCd B16a2 head w/ Supertech valve train and Pro 1s. Also S300 tuned.

 

Yes and will do!

 

nice! What shell was that in and any qtr mile times?

 

Was in a 2000 Si coupe (EM1) so times weren't super impressive.....averaged 12.80s @ like 108-109 mph. Same chassis is in the process of getting a nasty 320+hp/210+TQ 13:1 K24a2, going to be in the 11s still with full interior and amenities. The old B20v got boosted and then recently transplanted into a 95 EG hatch, which im selling.

 

what CR is on those pistons? I'm assuming 10.6-11:1 so with your build it would probably be in the 200+ish whp range depending on how aggressive you get with cam timing

 

I have a b20v in a Crx si gsr trans motor is a 97 crv b20 with 99 b16head chipped ecu from ha motorsports and blox Mani and throttle body and itr header with full type rs exhaust I did the valve adjustment the other day and when I pulled the spark plugs and looked at them and it's is running lean I have a stock pump injectors and fuel rail so should I order a fuel rail, pump, and injectors and get it tuned as I know it is all stock but not sure bc I'm running with boosted cars and raced a built Camaro and he only got me by 2 1/2 cars from a 20 roll need help bc goal is to out run the Camaro by just doing bolt on stuff but think fuel is really killing me someone told me to put a regulator on it and turn it up but I thought that the injector only sprayed what the cc it is rated to spray so help me someone

 

Gotchy very nice. Goodluck with that k series build. Should be a hell of a fun car.

 

84.5 rs machine pistons are 11.7-12.0

 

yeah at least that. on the zeal calc. once you start playing around with the increased bore size to 84.5+ and any milling/decking i think you wind up between 12-12.5

 

Does anyone know compression height or dome volume?

Or are we just going on what the ebay sellers tell us?

I would guess these are probably closer to 11:1 in reality.

Not to mention, those cams are going to bleed off any compression he makes.

Like I said, this motor will not make over 220whp on 93.

 

I dunno, I made 230 on 93 with less aggressive cams (Pro1s) and 84.5mm 12:1 CPs (was 12.5:1 all things accounted for) but then again, my head flows some serious CFMs. 4Piston knows their way around a CNC machine for sure! So it can be done, I'm just not sure if the Pro3s are the "best" can choice for that particular setup. I would think something 13-14:1 would be best for that profile.

 

3.4cc dome (checked with a mock up dry sleeve, reversed the cc to volume

29.8mm compression height as per 89mm stroke and 137mm b20 rod on an unmilled block

 

If that's true, these will net around 12.08:1 in this engine.

 

At that CR and 84.5mm bore and Pro intake, there's no reason with a good tune that can't make in the neighborhood of 230+Hp and 160-170 TQ or more. Unless the pro 3 is truly "too much" cam for your setup, which I doubt, you should have one nice little B20v on your hands. Like I said before, I made 230/165 with Pro1s, and a very, very similar setup. I have Manley rods, but that's not a power adder, and a CNC ported B16 head, but you have a ported GsR casting, so as long as the port work is decent, there's no reason your setup should not be able to meet and exceed my results on pump gas, with a tuner that knows what their doing. Hell I've seen stock Honda piston B20v setups at ~10.5-11:1 with Type R cams lay down around 210 with a good tune.

 

yep measured this in house at the workshop...


YCP derived pistons... quite consistent... gone thru almost 10 sets and checked all the same



so now im too tired to check it again LOL but i do when i get a set that i feel kind of sits diff at tdc or dome is visually a wee bit different

 

Pro 3's are big *** cams. BIG. Will they make power on this setup? Yea. Will they be the most efficient? I don't think so. LOTS of cars w/ 13:1+ on ethanol have made 250+ on pro 2's...this motor will not be in that range and will not benefit from the larger cams. That is my honest opinion based off the B20 builds I have studied (and I've done lots of homework). I think the IM/TB is going to be a drawback w/ those cams as well. It's just not paired right. Those cams needs tons of air and compression to really wake up. I personally think pro 3's belong is 2L+ 13:1+ fully ported on race fuel setups only or they just aren't being used for what they are made for.

I use my build as a good example. I have 12.5:1ish compression w/ pro 2 sized cams and there is still LOTS of room to grow into them and use them better.

Take it FWIW but smaller cams will make you faster on this setup. It would be nice for slowsleeper or Derek to chime in as well. Tou has some of the most impressive builds on the forum and Derek profiles cams.

Good luck and keep us posted

 

With that setup, cams, nice header, ported head, etc it should be a piece of cake to make over 220whp, if not then something probably wasn't set up correctly.

Here's a dyno of a similar engine I built 5+ years ago that had even less mods than yours does and this is what it made on pump 91:

85x89
RS ITR Pistons
Stock Rods w/ARP Bolts

Stock GSR head
S2 Pro2 cams
S2 Pro Series Springs/Retainers
Supertech Valves

Vx IM
Hytech Replica "small" tube header w/full 2.5" exhaust



If you are curious to what this exact engine made with a ported head, probably the same exact header as the one that you are using, Pro3 cam as well, and all on 91 pump premium? Check the last link in my sig.

 

Thanks for the info and i checked out that last link in your sig.. Thing must be animal! Nice job.

 

Appriciate the input, you may be right about the pro3s with my build. Honestly this was a pretty tight budget build and i had not planned on running the pro3 but i got an awesome deal on them that i couldnt refuse so i figured why not give em a shot.

 

Makes sense man. At least you have good trading material if you want a change

Check out my build thread. Fairly similar to yours, slightly different parts on a stock port head. The tune that is on it is w/o cam timing tuned and has ALOT of room for improvement with better fuel and some dyno time.