Best Place To Get A Head Job On My 33

[Beer Baron]

try envy imports. They recently bought a number of brand new RB26 heads and have been trying various different porting jobs and getting CNC programs done so they can now get them done on the CNC with hand finishing. I had a look at a few of the heads they'd done and they looked damn good. http://www.envyimports.com.au/contact_us.html 0408 637 489 Herman.

[WARLORD]

THANK YOU !!!

[Tangles]

Im doing the same to my Stagea soon (and hopefully me lol!!)

have bought, and have got on hand:

Cometic intake manifold gasket

Cometic intake collector gasket

Cometic exhaust gasket

Cometic Head gasket 1.2mm x 87mm

ARP head stud kit

EPP 6mm viton Intake valve seals

EPP 6mm viton Exhaust valve seals

EPP Intake valve seats

EPP Exhaust valve seats

EPP Intake valve guides

EPP Exhaust valve guides

Q45 90mm throttle body

Greddy Q45-RB25 adapter kit

EPP clear cam gear timing belt cover

Tomei oil gallery restrictor orifice

Tomei hi-lift valve springs ~8.8mm

Tomei 256/256 pon cam shaft set

2x 700cc Sard injector external intake manifold setup

Ive been quoted around $1200 to $1500 depending on how far I want to go with the porting job, from Lewis Engines in Mt Barker Sth Aus.

parts have cost me exaclty $3000 AUS, from Sliding Performance (best dealer on SAU, thanks guys), and Erics Performance Parts (USA Ebay, when the u$a-au$ dollar rate was almost equal)

so all up its a $4000 to $4500 job, plus the retune and basic service stuff. say 5grand.

looking for big torque thru the auto and around an easy 230kw

[STATUS]

lewisengines in sa do change over CNC porting which is handy, http://www.lewisengines.com.au/category25_1.htm#178

full pictures and shizzle.

Edited October 27, 2008 by URAS

[dano4127]

lewisengines in sa do change over CNC porting which is handy, http://www.lewisengines.com.au/category25_1.htm#178

full pictures and shizzle.

Its nice to see a website like that with all the prices and info provided

[PM-R33]

Thats a great link and not bad prices either!

[STATUS]

i should add i havent used them. ive been thinking about sending a spare sr and rb26 head accross for them to play with, then we will evaluate it once we get it back.

Edited October 27, 2008 by URAS

[PM-R33]

U heard much about their work? Might look into this, so much better to do it on an exhange basis when you can't afford to have your car off the road for a long period of time.

[Tangles]

They do have a reputation for their work over the past decade(s)

prices increase if you want extensive port work done though, from mild to wild apparently

talk to Darren Lewis for details

[PM-R33]

Warlord, how'd you end up going with this? Did you get the head ported?

[WARLORD]

Warlord, how'd you end up going with this? Did you get the head ported?

nar not yet still collecting info ive blown a clutch since this post started and still saving cash, im at 3k now and still need more i want a exhaust manifold,larger intercooler,throttle body as well so next year is looking good.

plus ive got a baby on the way so ill have 2 under 2 next year so it will be the last mod ((yer right))

[PM-R33]

Haha fair enough man. I just finished pulling my head off, sending it down south to get ported, angled valve job, new seals, new springs etc etc. Then chuck the Poncams in, squeeze 20 pound into her and try to see whether i can finally get my car running with camshafts haha. Ill let you know how i go.

Edited November 30, 2008 by PM-R33

[WARLORD]

Haha fair enough man. I just finished pulling my head off, sending it down south to get ported, angled valve job, new seals, new springs etc etc. Then chuck the Poncams in, squeeze 20 pound into her and try to see whether i can finally get my car running with camshafts haha. Ill let you know how i go.

who's doing your head.

[PM-R33]

Lewis Engines in Adelaide.

[WARLORD]

Lewis Engines in Adelaide.

what did you get done and price please

[PM-R33]

Ported and polished, increase of 30% flow to 255cfm. You can increase up to 270cfm but costs an extra $500.

Pressure testing the head. New seals. Angled valve job. Installing my new springs and then decking the head. So pretty much a full reco job.

$1050 plus freight of my head.

I might give them a buzz and see how much extra its gonna cost to install an oil restrictor to the head, figured i might aswell do it while its off. Going to do some more reading on it though.

[juggernaut1]

If that pic of the RB head in the Lewis engines link is anything to go by it seems they remove the quench pads. Meaning your chamber volume will be increased. So you will find you drop comp if your not building the bottom end to suit.

May want to confirm chamber volumes are the same or near the same as stock if your putting the head back on an already built bottom end and not going to a thinner head gasket.

[PM-R33]

What's a quench pad?! That's a new one for me lol.

[juggernaut1]

What's a quench pad?! That's a new one for me lol.

Have a look at the link to Lewis Engines in this thread.

Now look at the pics on the site of the chamber for the SR20. Now Look at their RB head. In stock form the RB head is smilar to the SR20 head. You will note that the RB chamber is round. The SR20 chamber is not round but has straight edges in the chamber running down its perpendicular. This formation essentally forms a quench pad in that on the upward stroke of the piston the pad compresses the mixture into a smaller volume into the middle of the chamber right underneath the spark plug and in doing so is said to aid swirl in the cylinder for a more complete burn.

Others argue that the pad - due to is straight ridge it forms in the cylinder - increases the basis for a 'hot spot' under compression leading to detonation.

If you look back at the other thread Shanef posted up a little while ago with pics of his JHH head you will note that JHH doesn't remove the pad but they lay it back towards the cylinder wall in a way that takes away some of the sharpness from pad. In this way they have attempted to keep the pad to keep up swirl in the cylinder but have modified the pad in an attempt to remove the potentional for detonation the pad can cause.

[PM-R33]

Ahhh i see. Thanks for clearing that up.