Fordmods Logo

how to raise compression??? 

 

Page 1 of 5 [ 74 posts ] Go to page 1, 2, 3, 4, 5  Next

 
 Post subject: how to raise compression???
Posted: Thu Jan 14, 2010 9:25 pm 
Tyre Shredder
Offline

Age: 25

Posts: 359

Joined: 22nd Dec 2009

Gallery: 10 images

Ride: el xr6, r33 series 2 skyline

Power: 149 rwkw

Location: adelaide
SA, Australia

im getting some head work done in a few days but want to know how to raise the compression more with out a rebuild?
has any one herd of lifting the lobes on the crankshaft to raise compression?

 

_________________

God made s**t, Holden put wheels on it

skyline daily
ford building

Top
 Profile  
 
 
 Post subject: Re: how to raise compression???
Posted: Thu Jan 14, 2010 9:26 pm 
Getting Side Ways
Offline

Age: 33

Posts: 6746

Joined: 13th Mar 2006

Gallery: 10 images

Ride: NCII Fairlane

Location: Bathurst
NSW, Australia

paulos wrote:
im getting some head work done in a few days but want to know how to raise the compression more with out a rebuild?
has any one herd of lifting the lobes on the crankshaft to raise compression?

the simplest way would be to but a head gasket like compression plate to raise it.

 

_________________

R.I.P Tobias my son.

Top
 Profile  
 
 
 Post subject: Re: how to raise compression???
Posted: Thu Jan 14, 2010 9:33 pm 
Getting Side Ways
Offline
User avatar

Posts: 807

Joined: 28th Oct 2008

Location: melburn
VIC, Australia

lol are you referring to fitting an AU gasket?
they are only marginly thinner than the previous series.
shave the head mate. talk to the person doing the head work, they will be able to tell your current cylinder volume (which in tern will determine the CR) and then let you know how much you can shave off to get the required comp.

i've had 50 thou shaved off my head and it gave it a good boost in mid to top end, but could proly do 60 thou. you would not be able to run anything less than premium unleaded and tuning would need to be spot on

 

_________________

XG Panelvan
mild engine, EL ECU & J3, HI6 & MSD coil

in the shed - .595" lift cam, GT4202, forged AU engine, ems 4424 ecu, glide & 5500 stall - next-bellhousing

XH ute daily - DOHC BA XR6 engine, T5, AU3 ECU, J3 chip, wideband & logger, ported BBM, 3" intake

Top
 Profile  
 
 
 Post subject: Re: how to raise compression???
Posted: Thu Jan 14, 2010 9:43 pm 
Getting Side Ways
Offline

Age: 33

Posts: 6746

Joined: 13th Mar 2006

Gallery: 10 images

Ride: NCII Fairlane

Location: Bathurst
NSW, Australia

misk_one wrote:
lol are you referring to fitting an AU gasket?
they are only marginly thinner than the previous series.
shave the head mate. talk to the person doing the head work, they will be able to tell your current cylinder volume (which in tern will determine the CR) and then let you know how much you can shave off to get the required comp.

i've had 50 thou shaved off my head and it gave it a good boost in mid to top end, but could proly do 60 thou. you would not be able to run anything less than premium unleaded and tuning would need to be spot on


no not the gasket it self a compression plate that looks like a headgasket

 

_________________

R.I.P Tobias my son.

Top
 Profile  
 
 
 Post subject: Re: how to raise compression???
Posted: Thu Jan 14, 2010 9:59 pm 
Tyre Shredder
Offline

Age: 25

Posts: 359

Joined: 22nd Dec 2009

Gallery: 10 images

Ride: el xr6, r33 series 2 skyline

Power: 149 rwkw

Location: adelaide
SA, Australia

i am getting an au gasket just so you know

and i think im getting 15 or 20 shaved off
but he dident say exactly what he was gonna do all i know is it is costing me 1300 ( 100 for the au gasket) he said epect my rwkw to be around the 160min to a max of 175 im hoping for atleast 165 tho

 

_________________

God made s**t, Holden put wheels on it

skyline daily
ford building

Top
 Profile  
 
 
 Post subject: Re: how to raise compression???
Posted: Thu Jan 14, 2010 10:03 pm 
Getting Side Ways
Offline
User avatar

Posts: 807

Joined: 28th Oct 2008

Location: melburn
VIC, Australia

i think your turned around :p
you might be thinking about dropping compression.

 

_________________

XG Panelvan
mild engine, EL ECU & J3, HI6 & MSD coil

in the shed - .595" lift cam, GT4202, forged AU engine, ems 4424 ecu, glide & 5500 stall - next-bellhousing

XH ute daily - DOHC BA XR6 engine, T5, AU3 ECU, J3 chip, wideband & logger, ported BBM, 3" intake

Top
 Profile  
 
 
 Post subject: Re: how to raise compression???
Posted: Thu Jan 14, 2010 10:04 pm 
Getting Side Ways
Offline
User avatar

Age: 28

Posts: 4326

Joined: 30th Oct 2006

Gallery: 18 images

Ride: Envi EF

Location: Grafton
NSW, Australia

Froudey, a compression plate will lower compression, theyre known as a de-compression plate... as used on some FI motors... they simply push the head further away from the block, exact opposite of an AU MLS gasket and getting the head shaved a few thou.

175rwkw? do you know the specs of the cam?

 

_________________

>>>EF Futura T build<<<

Top
 Profile  
 
 
 Post subject: Re: how to raise compression???
Posted: Thu Jan 14, 2010 10:10 pm 
Tyre Shredder
Offline

Age: 25

Posts: 359

Joined: 22nd Dec 2009

Gallery: 10 images

Ride: el xr6, r33 series 2 skyline

Power: 149 rwkw

Location: adelaide
SA, Australia

nope i dont il find out when i hand it to him on this monday and post it up, but he said thats the maximum i can expect to get he said rather that ganing kw its more so torque. but he has had a few get 175rwkw look on the dyno records for one around that and i think its an el and it says henrich performance and tunning, proof my guy does good work ( or someone got lucky)

 

_________________

God made s**t, Holden put wheels on it

skyline daily
ford building

Top
 Profile  
 
 
 Post subject: Re: how to raise compression???
Posted: Thu Jan 14, 2010 10:12 pm 
Getting Side Ways
Offline
User avatar

Posts: 1543

Joined: 7th Mar 2007

Ride: ED Pwnage Pwr!!

Location: onawhoopwhoop
SA, Australia

f**k me, thats alright, might have to get some stuff done by this fella!

 

_________________

Adelaide Motorplex < Click on it! You know you want too!
ED HP AU XR6, Wade, T5, and all the usual stuff!

Quote:
Thats not the point *a**hole

Top
 Profile  
 
 
 Post subject: Re: how to raise compression???
Posted: Thu Jan 14, 2010 10:21 pm 
Tyre Shredder
Offline

Age: 25

Posts: 359

Joined: 22nd Dec 2009

Gallery: 10 images

Ride: el xr6, r33 series 2 skyline

Power: 149 rwkw

Location: adelaide
SA, Australia

my m8 who has an ed like you got 154rwkw from his manuel so you could be in luck hes down at lonsdale just type him up on google and itl tell you were to go, he is booked two weeks in advance no matter what time of the year tho like i booked this head work about 1 month ago or more so yer hes booked

 

_________________

God made s**t, Holden put wheels on it

skyline daily
ford building

Top
 Profile  
 
 
 Post subject: Re: how to raise compression???
Posted: Thu Jan 14, 2010 10:35 pm 
Getting Side Ways
Offline
User avatar

Posts: 3363

Joined: 27th Dec 2004

Gallery: 4 images

Ride: MCMXCV Falcon

Location: G town
VIC, Australia

are u just taking the head off and shaving itt and running the au gaskit?

1300 is a lot just for that....

whats the complete list of mods u have so far?

 

_________________

Image

Top
 Profile  
 
 
 Post subject: Re: how to raise compression???
Posted: Thu Jan 14, 2010 10:43 pm 
Tyre Shredder
Offline

Age: 25

Posts: 359

Joined: 22nd Dec 2009

Gallery: 10 images

Ride: el xr6, r33 series 2 skyline

Power: 149 rwkw

Location: adelaide
SA, Australia

well see he does some other stuff to included in that price thats why he can get such high figures like 175rwkw, or mabye hes just charging lots, but he dident tell me he was just gonna shave the head he spesificaly said hes gonna do what he needs to do so if i see the results im happy

so far iv got, a cam( dunno which one find out on monday) catback, cat, exctractors and chip im making 149rwkw atm

 

_________________

God made s**t, Holden put wheels on it

skyline daily
ford building

Top
 Profile  
 
 
 Post subject: Re: how to raise compression???
Posted: Thu Jan 14, 2010 10:49 pm 
Getting Side Ways
Offline
User avatar

Posts: 3363

Joined: 27th Dec 2004

Gallery: 4 images

Ride: MCMXCV Falcon

Location: G town
VIC, Australia

cool....sounds good but you need to find out what your actually getting cause to me thats a lot of money that could be spent elsewhere

 

_________________

Image

Top
 Profile  
 
 
 Post subject: Re: how to raise compression???
Posted: Thu Jan 14, 2010 10:55 pm 
Tyre Shredder
Offline

Age: 25

Posts: 359

Joined: 22nd Dec 2009

Gallery: 10 images

Ride: el xr6, r33 series 2 skyline

Power: 149 rwkw

Location: adelaide
SA, Australia

i should find out, if it helps he will be taking the car for three or 4 days and its not just coz hes booked. hes really good tho with prices all up iv spent 3 grand and pretty happy.
as a genral my tuner only charges for instilation not the parts.
any ideas what else he could be doing for that sort of money?

 

_________________

God made s**t, Holden put wheels on it

skyline daily
ford building

Top
 Profile  
 
 
 Post subject: Re: how to raise compression???
Posted: Thu Jan 14, 2010 10:55 pm 
Getting Side Ways
Offline

Age: 33

Posts: 6746

Joined: 13th Mar 2006

Gallery: 10 images

Ride: NCII Fairlane

Location: Bathurst
NSW, Australia

krisisdog wrote:
Froudey, a compression plate will lower compression, theyre known as a de-compression plate... as used on some FI motors... they simply push the head further away from the block, exact opposite of an AU MLS gasket and getting the head shaved a few thou.

175rwkw? do you know the specs of the cam?


I think I had a blonde moment.... lol

 

_________________

R.I.P Tobias my son.

Top
 Profile  
 
Display posts from previous:
Sort by  
 Page 1 of 5  [ 74 posts ]  Go to page 1, 2, 3, 4, 5  Next

Who is online

Users browsing this forum: Google [Bot] and 24 guests


You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot post attachments in this forum

 

 

It is currently Sun Dec 17, 2017 8:01 am All times are UTC + 11 hours

 

 

(c)2014 Total Web Solutions Australia - Australian Web Hosting and Domain Names