Lukezen_27

Hey Guys

I'm looking at lowering my B16A SiR-II's compression and up the boost a bit... 15psi

Any thoughts on using ether GReddy or BUDDY CLUB Metal 2.0 Head Gaskets?

My tuner recommended HKS but there harder to find.

Motors current comp is 10.4 running 9psi on 98octain 161kw or 217hp

Thanks

Luke

rick_rabies

oem head gasket. dont even bother with other ones. they are not even worth looking for. alot of big boost people use oem.

Lukezen_27

OEM won't lower the compression

rick_rabies

your right. switch out pistons then (easier then you think)
the thicker the head gasket the more likely you will blow it out.
the thinner the more likely you will have a leak
oem has worked wonders for mine...12lbs of boost. cams. e85..

Lukezen_27

Yeah i was trying to avoid changing the pistons lol

Will cost more than I can afford!!! labours very expensive in Sydny

rick_rabies

i did my own stuff. very easy. while the head is off.
take off the oil pan, pickup, and baffle. then 2 at a time unbolt the rods and pop them out and switch out pistons and use a $10 piston ring sqeezer and pop them back in.
thumper64 has eagle rods and wiseco pistons for sale super cheap

HamiltonRex

just throw more boost at it the way it is. lowering the compression wont make that much of a difference anyways in how much power you can squeeze out of it.

Lukezen_27

I do all my own work but inside the motor...

Can they be changed with the head still on?

rick_rabies

yeah...but good luck doing it from the bottom.
hamilton is right though. you can do 15lbs of boost on that motor all day long. im sure you would be happy with the #s.
tell you tuner its your car not his and tell him how it is and that he needs to make the changes not you. have fun

Lukezen_27

Strange hay...
No one here in OZ runs 15psi on there B16/B18

12psi is considered the highest on stock B's

rick_rabies

theres a thread here of record holdings. alot of people have done in the 20s and made mad powa. on stock motors

rick_rabies

https://honda-tech.com/forums/showth...2036623&page=8

Lukezen_27

Cheers

Man some of those numbers are insane lol

TheShodan

iTrader: (14)

it's not the amount of boost that makes the difference, its the turbocharger itself. Guys down there for some reason get scared to run good sized turbos down there to make power. The stock block with even that compression can easily do 261Kw to the wheels and over 280Nm of torque without having to change the bottom end. you need better injectors and better tuning. No need to change the head gasket to lower the compression if you're tuner knows what he's doing.

Lukezen_27

I'm running a GT2871R 0.86 rear
RC 440cc injectors

Need bigger yeah

rick_rabies

after i did ported head work and added some stg1 cams it was a gigantic difference.

TheShodan

iTrader: (14)

On EXACTLY the same turbo as Lukezen 27? the GT2871R doesn't benefit that great with bigger NA cams like the larger units do.

Lukezen_27

How would the Type R DC2R cam+dual springs+retainer go?

cleansi

i love my bc 2mm hg both my cars have it. i had the milled down a little and all the people using i found were satisfied 4 low hp low boost all the way up the proffesional guys deff obviously recomend arp bolts 2
b16b 14lbs gt35r no problems

TheShodan

iTrader: (14)

It's fine for 8400rpms. Just because you rev higher and higher, doesn't necessarily mean you make more and more power. But that combo is fine without the need of a Head Gasket