Lets Talk d-series

[Lukezen27]

Luke just get out there and drive that thing like you bloody stole it. when i did my very first runs i was doing like 16s just because i was too scared to push my car and drive agressively.

You car is good for low 13s dude.

just dont get put off by your first few runs



Beeze - no stress mate... actually i cannot claim that i built the head, i purchased it of dan last year (beastcivic)

lol Lyle

I boost and red line my car daily, if there's one thing I don't have a problem with the drive'n the f**k out of my cars

[SeverAMV]

Bisi Ezerioha's 9.5 second pass was with an f22 motor fed by carbs, which is pretty good considering its a single cam. i think his d series record was 10.2 or so with carbs.

on the topic of head work, my d15b4 has been milled down 1mm, ported, and currently houses a kms titanium valvetrain. to take advantage of it is a bisimoto stage 2 cam. it was running on 2 degrees advance, but then the cam gear shredded itself, currently waiting for a replacement.

bottom end handled by a 3 layer high comp metal head gasket, p29 pistons on stock rods, new bearings. exhaust handled by $17 ebay 4-2-1 extractors (you might think theyre crap, but they have the exact same design as half the name brands, only real header you'll get good performance from is a bisimoto), and a 2 inch mandrel bent system to ensure maximum bottom end response.

to get the power down to the ground are an XTR heavy duty clutch, and 4kg flywheel.

going in for a dyno tune soon to get the sparkies firing at the right time due to the swirl effect the domed p29s make in the cylinder under compression.

still using the factory keihin twin carbs in my ed6, until i can find linkages to complete my new setup featuring a pair of dual sidedraught dcoe40 skracing carbs.

at the moment without the tune or the new carbs, im running 15.2-15.4seconds unofficially (if you know what i mean) with bridgestone adrenalin tyres, high 15s with cheapo maxxis tyres.

my goal is a 14 second pass with an NA d series motor.

anyone else got a worked NA D?

[d15z1SUX]

i don't but im considering doing it. need to swap my d15z1 for a jdm d15b or d16a6 i think its called. the one from the eg vti hatch. or was it d16z6?

leaning towards the d16a6 as it will have more aftermarket support. jdm d15b will be impossible to upgrade the bottom end parts?

[SeverAMV]

i don't but im considering doing it. need to swap my d15z1 for a jdm d15b or d16a6 i think its called. the one from the eg vti hatch. or was it d16z6?

leaning towards the d16a6 as it will have more aftermarket support. jdm d15b will be impossible to upgrade the bottom end parts?

not really. pretty much all d15 and d16 motors have the same bore, only difference was the deck height and crank. www.fjdistributors.com can do a custom length rod for you, and they include their own custom rod bolts, which are of similar strength to arp. all pistons are pretty much interchangeable. your only poison will be finding the right bearings. there are a fair few different d15b motors, not to mention that each continent received a different sized crank, etc. ie. usdm uses 42mm/38mm bearings, whereas audm used 45mm/40mm bearings.

crankshafts, best bet would be to get it knife-edged/lightened by a machining shop.

check out www.onecamonly.com, their sponsors have a fair few aftermarket kits you can get for a single cam motor, and some even for the twin cam d series.

check out http://www.zealautowerks.com/dseries.html to figure out which combination you want to use for best compression.

[d15z1SUX]

ah ic... i think i need to do more research lol.

[beeza]

Yeah the Bisi Header is the Sha-zizzle alright.He's got one that allows you to keep aircon too.It can be ordered off him through 'd-series.org'.His Username is 'bisimoto'.costs about $800 ish...


Here's what he has to say about his header:
Here

[SeverAMV]

yep, thats the header. according to most calculation programs, 25 inches is how long the primaries need to be for maximum power in a car, but due to inefficiencies in reality, bisimoto found the primaries needed to be 35inches +. thats why it has an unusual design, but the power gains speak for themselves.

[beeza]

It just looks so damn sexy too!!! hehehe

[SeverAMV]

oh and if i remember correctly, its what you dont see that helps it perform well. from what i hear, there are numerous different diameter pipes used in the construction to create anti reversion steps to improve power and flow. and the flow speed through the extractors in a d series motor has been measured at around 0.7-0.8+ mach

[R_RaTeD]

Yeah the Bisi Header is the Sha-zizzle alright.He's got one that allows you to keep aircon too.It can be ordered off him through 'd-series.org'.His Username is 'bisimoto'.costs about $800 ish...


Here's what he has to say about his header:
Here

those look awesome !!!

[dahon]

that looks sweeeeet.... maybe i shall do my uni thesis on the flow within that header... looks awesome!

[d15z1SUX]

yeh those headers are awesome... i also would like bisimoto headers.