A proper B20vtec (oem style) project for Mac

Owner had a first gen B16a swap installed to his Eg civic hatchback... and whilst the engine bay was repainted and needing the usual and typical high mileage maintenance, the owner figured going to a b20 vtec would be sensible (cost wise)

set-up is comprised of :

- B16a Cylinderhead : ported and developed by us + CTR/ITR dual springs installed
  new oem honda valveseals + camseal and machine decked surface making this head "new" in condition

-B20b Block : Rebuilt and refreshed with New oem daido/taiho main and rod bearings, ARP rod bolt  fastener upgrade, Bnew 1up Pistons (similar to YCP style) but this 1up piston is based on a derived design off the ARIAS 7.4cc dome pistons on p3h piston geometry so it sits 0.030" below which is okay for pump
* proper main bearing oil clearance is achieved and done
*proper rod bearing oil clearance is achieved and done aswell...
*proper ARP tightening sequence of "stretch" vs just simply torquing them
*our own custom made steel braided vtec oil line and fittings

-Intake manifold : OEM p30 b16a intake manifold we have ported and had the plenum cut, to let us port the  proper intake runner radius and shape then tig welded back shut this motor will be a torque monster :)

-Exhaust : stainless copy of a ctr/itr 4-1 header

some "OEM" flavor upgrades and some aftermarket are

-Camshaft : B18c1 cams which are significantly meatier than the second gen b16a cam and significantly  beefier than a first gen b16a cam (which the owner had) As mentioned above we have thrown in a ctr/itr  dual spring upgrade to insure safety

-Camgears: Skunk2 ProSeries adjustable camgears to let us tweak the powerband to where it likes it best

-Target Compression ratio is 12.4:1 which is perfect for our 95ron pump gas

-Will run on obd1 P06 rechipped ecu by Ecu_later, and tuned via Crome

next are photos of the project :

 Here we have a shot of the 1UP pistons and ARP rod bolt fasteners,
and the second shot is of the rods itself pressed on the 1up pistons (dont mind our rare 36idf carb in the background haha)

Next is a sneak peek of our portwork done on the venerable P30 b16a OEM (stock) intake manifold
the entry are carefully radiused to improve its efficiency and increase excellent air speed, all of which helps generate better torque earlier and carry it longer

A view of the 1UP piston domes peaking out :) notice the deck it sits 0.030" below so this will suit even the GSR style chambered heads and give significant piston to valve clearance since it is Arias based giving it ample room even for 1mm oversized intake valves should you need that.

We pride in installing the ARP rod bolts as how they prefer it, via the "stretch" method so here is our indicator showing the proper stretch which arp calls for 0.005-0.0055" and we are in the window

 Here is a shot of the p30 intake manifold fully welded, and the Steel braided vtec oil line layed on top of it... and slightly below it is the new ARP rod bolt before we installed it (sorry for that mess LOL)

A nice shot of the intake port we did, the keen eye will notice the port itself isnt entirely hogged out
this promotes excellent airspeed and torque generation

A nice angled shot showing how the short turn blends well with the port side walls and the port divider itself

A shot of what the injector see's  aka the Money Shot  LOL

The finished b20vtec OEM style refreshed into a "new" condition
in reality this is a zero mile motor as it sits on the stand, virtually it hasnt seen any miles yet.
So the owner will enjoy this as if its Bnew :)

Another shot with a slightly better view of the skunk2 Proseries camgears
that is the only hint that it is beyond "stock" in rebuild status

we will keep you posted as soon as the owner gets some miles and have it tuned with us.

*as it stands, the civic hatchback is waiting for paint curing on the engine bay then they can have the engine installed as soon as possible...

Stay Tuned!