84Riceeater

iTrader: (1)

Please share your thoughts and concerns you might have. Short story, I started this build about 7 years ago but never finished untill recently i decided to start pumping money into this black hole. years latter i found out some parts i bought weren't the best choices today. This car is going to be a weekend summer crusier with some capabities to do a little of everything. i would be happy if i got to make around 380hp-400hp.


-BLOCK-
B18a
Decked,bored/honed,and aligned honed with torque plate and arp main studs installed.
81.5mm CP flat top pistons. Unknown compression :/
eagle rods w/ arp bolts.
acl race bearings.
micropolished crank
fully balanced complete rotating assembly
Fluidampr
Golden Eagle block gridle.
Golden Eagle ls/vtec kit
OEM headgasket
OEM gaskets.
OEM timining belt
ARP main studs
ARP head studs
rear oiling hole deburred (where your oil filter goes)
Comp clutch Stg 4 sprung.

-HEAD-
B16a head
-blox retainers (bought from friend that really sounded unsure) there unmarked
-blox valve springs (bought from friend that really sounded unsure) there unmarked
-supertech flat face valves. ( not the best valves for turbo i understand)
-BC STG2 turbo cams (bought new when 1st came out.) i understand PRO1's or similar would work better.
-Golden eagle Cam gears
-bowl work on the intake
-Hondata manifold gasket.
-1st Gen blox type r intake manifold.
-70mm omin TB
-Speedfactory 3 bar map
-new oem valve seals

-FUEL-
stock 240cc injectors for start up.
-780 precision injectors
-aeromotive FPR
-Walbro 255

-Turbo Kit-

Stainless Steel tubular manifold (sidewinder)
Turbonetics BB Turbocharger T3/T04E-50E 45lb/min
Turbonetics Intercooler
2.5 piping.
TiAL 44mm Wastegate
3" downpipe

will be ran with hondata s300 V2

last things i need are a dizzy and wideband.

What you fellas think?

TheShodan

iTrader: (14)

Looks pretty solid so far, but for your camshafts, just stick to the GS-Rs or Type R OEMs if you can. For your particular needs, the BCs are not only unnecessary, but have shown that despite their great specifications, they just don't seem to perform that well. especially for the use you plan.

NotARaCist

iTrader: (1)

You're trusting unknown compression pistons in a motor you're building? Uh...

wantboost

iTrader: (2)

Sounds like a solid build. as long as the machine work on the block was done properly I don't see an issue.

as far as the pistons, if the tops are completely flat then the compression ratio will be somewhere around 10:1-10.5:1 maybe a little higher with the flat faced valves so figure 11:1 at most. the b16 head also has smaller chambers so that means a slight bump in compression but I figured that into my numbers above.

even at 11:1 you should be fine on 93 octane if you have a competent tuner.

wantboost

iTrader: (2)

I'm doing a similar lsvtec build with flat top arias pistons and a b16 head. I think my compression ratio was between 10.5:1-11:1

assuming your pistons don't have a weird compression height and the pin hasn't been moved (it shouldn't) then the numbers I said should be pretty close.

can you take a pic of the piston? also there should be some sort of part number etched on the pistons. It's either going to be on the underside of the top or on the bottom surface of the skirts. that number should let the mfg pull up the piston specifications

84Riceeater

iTrader: (1)

@TheShodan- Thanks for your reply. would you spend the extra money on typeRs or GSR's or run these for free? BTW i seen you in a Honda-tunning article the other day about that cool oil filter, nice!

@wantboost Thats for the info! i do have pictures of the pistons. i'll send them once im on a home computer. i was a little worried about 11:1 on a turboed engine. There is some big tunining shops around here. SpeedFactory and RichTunned. i dont know if there big names outside of the Pacfic North West/Seattle area. Still debating which one i wanna tow the car to

@ NotARacist- i decided to buy these pistons because they were flat top and would remain some where near stock compression and a good deal.

wantboost

iTrader: (2)

SpeedFactory can get it done without issue.

they've tuned some fairly wild setups IIRC.

with today's engine, ecu, and fuel technology there's no real reason for a low compression turbo motor. that's old school logic when everyone was trying to run lots of boost without detonation.

The flat tops normally won't have a compression ratio over 11:1 static. this of course depends on bore size, how much the block and head have been decked, piston deck height, etc.

like I said your flat flaced valves might bring it up a few tenths of a point (I've heard some say half a point) but no one really knows just how much the valves change it... I don't recall anyone ever measuring chamber volume in cc with flat faced vs dished valves.

DDTECH

Change the cams - Anything "with" turbo in the name is probably gonna suck. LOL
Budget wise, Pro1's, GSCs T1's and s2s2's are good camshafts for these type of builds, if money isn't a problem and you wanna make the most, Step up and contact me

TheShodan

iTrader: (14)

Hehe.. Yeah. I'd honestly get a real turbocamshaft, such as the GSCs or stick with OEM Type R. I was given a set of BC camshafts and kindly gave them back...

That's a sign to change them out to something else.

84Riceeater

iTrader: (1)

Thanks guys for the imput, really helps. I decided i cant really sell these cams to anyone that does there research. :/ so i decided to go ahead a use them and change out the camshafts for type R's in the winter time along with a new intake manifold. i wanna get this thing on the road this summer. Anyway to degree a camshaft without compressed air?

wantboost

iTrader: (2)

Craigslist or eBay. tons of people will buy them.