Hello from Australia! My D16Y4 build is coming up on completion and booked in for a tune end of this month. I’m just wanting to know what power figures others think it will achieve? the build list below is one I created for the tuner, that’s why it lists some odds and ends…
Will be flex fuel tuned, mainly wanting opinions on E85 figures.
Before anyone mentions It, I can’t source any aftermarket cams for a Y4 motor here in Australia, Y4 being a non v-vtec head.
Power goal
Age / condition
Motor
Exhaust
Induction
Gearbox
Fuel system
Electronics
Notes
Will be flex fuel tuned, mainly wanting opinions on E85 figures.
Before anyone mentions It, I can’t source any aftermarket cams for a Y4 motor here in Australia, Y4 being a non v-vtec head.
Power goal
- Aiming for 350whp minimum, would love 400.
- Redline @8k if safe to do so
Age / condition
- All aftermarket gear is freshly done with 0km on it.
- Motor has run previously on a crappy base tune, but all items marked with a “✅” have been done since I’ve acquired the car and haven’t been tested yet.
Motor
- D16Y4
- P2P0 custom length forged rods
- 3/8” ARP 2000 rod bolts
- YCP 75.5mm vitara pistons (.5mm oversize)
- OEM sleeves (.5mm oversize)
- 8.81:1 CR
- Hastings rings
- Stock crank balanced and polished (old/ original)
- Bearings unknown
- Block guard
- ✅ OEM Honda head gasket (went from .060” to .030” thickness
- ✅ ARP head studs
- Supertech intake and exhaust valves .5mm oversize
- Supertech valve guides and stem seals
- Supertech valve retainers
- Bisimoto valve springs
- OEM camshaft (old/ original)
- ✅ Skunk2 adjustable cam gear
- Gates timing belt
- Gates water pump
- OEM oil pump (old/original)
- ✅ Spark plugs NGK 5585 ZFR6J-11 (gapped to .8mm)
- Block and head freshly skimmed
Exhaust
- PLM top mount turbo manifold
- 3” downpipe
- ✅ 200 cell magnaflow HFC
- ✅ Invidia G200 catback (3”)
Induction
- Pulsar GTX3071R .63 (T3)
- Pulsar 44mm external waste gate
- Skunk2 70mm throttle body
- OEM intake manifold ported
- BOV (unknown brand, won’t be used)
- Tube and fin intercooler
- ✅ Pod filter 3” flange
Gearbox
- Original gearbox (unsure what the model is)
- Straight cut 2nd and 3rd gears (MTM Gears D series 1.261/.925 3/4 gear set. Straight cut, synchronous engagement.)
- Mfactory diff bearings
- Syncrotech carbon syncros
- XTD stage 4 clutch (cheapy that came with car, only rated to 350hp, will eventually replace)
- Mfactory helical LSD
- ARP flywheel bolts
- XTD lightweight flywheel
- Spoon sports LSD ring gear bolt set
Fuel system
- ✅ Walbro 525
- ✅ Full system -6 hose
- ✅ ID1300x injectors
- ✅ AEM fuel rail
- ✅ Turbosmart FPR1200
- ✅ Radium fuel pump hangar
- Epman 100 micron filter
- ✅ Proflow fuel pressure gauge 0-100 psi
- ✅ Syltech flex fuel sensor
Electronics
- Haltech 550 Elite
- ✅ Haltech cam lambda
- Water temp sensor - unknown brand
- Air temp sensor - unknown brand
- AEM engine position module
- Coil on plug conversion (✅ NGK ignition coils U5051)
- Boost solenoid to be supplied and fitted by proximity
Notes
- Charging issue as mentioned. Replacement alternator is on order and will be fitted prior. Will require testing as old alternator is charging @17 volts.
- FPR hasn’t been set
- Coolant will need bleeding (coolant supplied)
- Engine oil - Penrite 15W40 running in oil (level will need checking after first run)
- Adjustable cam gear set to 0° (use “D16Y8” degree markers, NOT the “D16Z6” ones)
- BOV won’t be used, if possible adjust to closed position
- HG was originally .060” thick, however I have since changed this to an OEM Honda HG which I believe is .030” thick. If possible check piston valve clearance (with camera?)