Hello guys....
In September 2011 I started a new turbo project on my D16z6 Civic 93 hachback.I am making this car for drag racing and a little bit for street racing.
Here is my project and the parts I,m going to use

D16Z6 Darton Sleeved block 78mm bore
9.1 WISECO Pistons
Eagle H-baem rods
ARP Head Studs
ACL Race Baerings
OEM Crankshaft
OEM Water pump
OEM Oil Pump -ported
Spec ceramic clutch
OEM Flywheel
Custom Intercooler
1000cc infectors
golden eagle fuel rail

D16z6 Head (fully build-Port and polish)
Supertech 1mm oversize Valves
Supertech valve springs and titanium retainers
Supertech valve guides
Supertech valve seals
Bisi level 3.6 cam
Bisi cam gear
OEM Head gasket

Golden Eagle Manifold
Edelbrock trottle body (not decided yet what bore)
Topmounted Custom made manifold
Tial 44mm WasteGate
Tial 50mm BOV

3 inch pipes
Hondata s300

Garrett GT3582r

Tranny
D16z6 with LSD
Axles for 650hp

So I am looking for 550WHP and the question is about the Darton Sleeves.Is it better running 78 mm bore instead of 75 or 75.5?????I have seen many drag car turbo builds which have 500-600 whp and none of them have 78 mm bore.Why is that???If I run 75 does that mean that i can run more BOOST?And if 78mm from 1.6l it will be like 1.7l engine,but the cylinder walls can brake????Please help me take the right choice....

And is 9.1 good for this purpose or i should run like lower for high boost???
And what bore has to be the throttle body? 76mm is i ok ?Or i need more?
Is 3 inch downpile ok?or need more?
Thanks Guys!!!

 

Hi, and welcome..
Your compression is fine. lowering it to run "more boost" will not give a better result unless you don't have a trusted tuner.

Bore size will not matter for the power level you're doing. The other guys use a smaller bore for when they have to re-hone the block with the expectation that they are going to blow the engine, and want to reuse the block for more builds. They plan ahead for rebuilding.. not for power.

 

does your bisi 3.6 cam have any part number engraved on the cam? pictures would be awesome! thanks. Good luck on your build. i have a similar set up but im running a gsr tranny with lsd.

 

What theshodan said. There's a tradeoff between lower compression, boost levels and power. Just because you can run more boost doesn't mean you'll make more power. If you lower compression too far you'll need more boost just to reach the previous power level you were at with less boost. Plus with really low compression the car is no fun to drive while you aren't in boost.. It will be very sluggish and get horrible fuel mileage.

9:1 is an all around good c/r. Allows for good power production while allowing for good detonation resistance. Allows for decent power while cruising and driving around under light load in vacuum and doesn't get horrible fuel mileage

I had a chart somewhere but i can't find it.. I think it was for every point you loose in compression was a 3-5% loss in thermal efficiency resulting in a 2-3% drop in fuel mileage per point dropped.

 

i am still waiting for my Bisi cam.Can't tell you the part number.
About the gsr tranny...can i put one of them ot D-series...and if I can how to do it?It has to be made with a flange?ot what

 

You need a d2b kit.

 

samo pics of my engine bay.I started work before 2 months and don't have enough time for the car.Things are moving slow

the bay before

after









Intercooler is given for custom work.The hot and cold side ports are going to be in the back of the intercooler for saving LAG.

for new seats



and rear bumper




when I have time and progress I will make a Thread.

Greetings from Bulgaria!

 

Make sure they actually build purpose built end tanks and don't just weld up the existing ones and weld rear inlets and outlets on.. It'll flow like ****, even worse than ebay intercoolers already do

 

i told the guy to make it like this with new tanks.He will cut the old tanks and make another ones



What do you think ?Is it better if i leave the cold side of the cooler original,or it's better two ports to be at the back?I am planning to install 50mm TIAL BOV on the hor side of the intercooler

 

this is one of the kits, or you can custom make it youself. all you would need is a custom flywheel made by CC (Competition Clutches)

https://honda-tech.com/forums/performance-45/mazworx-d2b-adapter-kit-%7C-d-series-w-b-series-transmission-2883097/

 

here is the IC.Just got it from the post office

 

looks good! BUMP!

 

1mm oversize

 

-3" downpipe would be the minimum diameter

-IMO 75.5 will get it done on bore size (thats what we used and made plenty of power w/ Darton sleeves). Id go with slightly more compression than 9:1...thouh 9:1 will work fine (which is also the same compression I previously used)

 

here are some new pics





this is the colour


today I sent the head to the machine shop for 3 angle valve job port and polish

 

Nice build. I would also stick with stock bore since the sleeves are fresh this will give you room to rebuild the motor when the times comes. IMO 9:1 is a bit low but good, personally I would be 10:1-10.5:1 area. Higher compression will help with turbo spool as well as off boost low end power. For boost there is really no need to go with over sized valves the gains wont really be worth it compared to a NA build, however the D series valves are tiny. Some mild port work is nice but for 550whp a stock head is fine.

 

less weight for drag is better

back door and front hood weight 8.8kg both