MINI2

Jaw_F430 · Mar 28th, 2008, 05:36 PM

Could anyone tell me the differences between the OEM head and JCW head?

My understanding is that just the exhaust port is modified, is this correct?

James

alski · Mar 28th, 2008, 06:36 PM

yep and not by much...think about it, 380cc injectors, pully, upgraded ecu, air box...all this would be giving a lot more than 210 if the head was any good
or to put another way if your offered one foc i doubt if the gain would be worth the fitting cost

Jaw_F430 · Mar 28th, 2008, 06:43 PM

Quote: Originally Posted by alski (original)

yep and not by much...think about it, 380cc injectors, pully, upgraded ecu, air box...all this would be giving a lot more than 210 if the head was any good
or to put another way if your offered one foc i doubt if the gain would be worth the fitting cost

Cheers,thats what I thought as the gain with the head fitted wouldn't be much, just wanted re-assuring for future debate with dealer

black20vt · Mar 29th, 2008, 10:54 PM

Quote: Originally Posted by alski (original)

yep and not by much...think about it, 380cc injectors, pully, upgraded ecu, air box...all this would be giving a lot more than 210 if the head was any good
or to put another way if your offered one foc i doubt if the gain would be worth the fitting cost

Not sure that it isn't any good., depends on what you are doing with the car.
I have std injectors, std ecu ?, (pre facelift JCW). GTT CAI, Manifold and intercooler and it puts out 233 (thats on 11% pulley remember).Plus its better fuel consumption than std.
The point I'm making is that you have to allow the head to breathe for it to become effective.
When I first got the car it was bog std JCW and it felt strangled above 5000rpm. Allowing it to breathe better has transformed it

.
However for the money there are far better head options than JCW. Thats the killer with a head - the fitting cost, and you also have to factor in the removal cost if you are planning to return to stock to sell on later.

Jaw_F430 · Mar 30th, 2008, 01:39 PM

Quote: Originally Posted by black20vt (original)

Not sure that it isn't any good., depends on what you are doing with the car.
I have std injectors, std ecu ?, (pre facelift JCW). GTT CAI, Manifold and intercooler and it puts out 233 (thats on 11% pulley remember).Plus its better fuel consumption than std.
The point I'm making is that you have to allow the head to breathe for it to become effective.
When I first got the car it was bog std JCW and it felt strangled above 5000rpm. Allowing it to breathe better has transformed it

.
However for the money there are far better head options than JCW. Thats the killer with a head - the fitting cost, and you also have to factor in the removal cost if you are planning to return to stock to sell on later.

thats good power on 11% pulley, can you post the dyno sheet?

You are right though there are better heads out there, thats why I have bought the RMW head- work of art!!

MINI-Morgan · Mar 30th, 2008, 07:35 PM

Its very basically flowed from what I know but certainly not an investment id advise. If you are spending the money to fit one then pay a little extra and get a big valve head instead

black20vt · Mar 31st, 2008, 10:42 PM

Quote: Originally Posted by Jaw_F430 (original)

thats good power on 11% pulley, can you post the dyno sheet?

You are right though there are better heads out there, thats why I have bought the RMW head- work of art!!

http://www.mini2.com/forum/engine-dr...ml#post3382730

that should work..

The RMW head should be renamed the Borg head - as resistance is futile

I need to sort suspension first as I can't get all the power down on bumpy b roads - maybe that's too much to ask though ?

Mar 28th, 2008, 05:36 PM	#1
Jaw_F430 MINI2 Senior Join Date: Jul 2007 Location: 7600rpm Local Time: 05:45 PM Posts: 699 Offline	Difference in JCW head vs OEM head Could anyone tell me the differences between the OEM head and JCW head? My understanding is that just the exhaust port is modified, is this correct? James

Mar 28th, 2008, 06:36 PM	#2 (permalink)
alski dyno-mite, might not.... Join Date: Dec 2005 Location: banbury Local Time: 05:45 PM Posts: 954 Offline	yep and not by much...think about it, 380cc injectors, pully, upgraded ecu, air box...all this would be giving a lot more than 210 if the head was any good or to put another way if your offered one foc i doubt if the gain would be worth the fitting cost carefree

Mar 30th, 2008, 07:35 PM	#6 (permalink)
MINI-Morgan MINI Obsessed... My Classifieds Join Date: Nov 2003 Location: Southampton, Hants Local Time: 05:45 PM Posts: 4,651 Offline	Its very basically flowed from what I know but certainly not an investment id advise. If you are spending the money to fit one then pay a little extra and get a big valve head instead One Man, One Project......find out what happens next at MINIProject.co.uk For MINIs in the south it can only be South Coast New MINI Club

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Mar 28th, 2008, 06:43 PM	#3 (permalink)
Jaw_F430 MINI2 Senior Join Date: Jul 2007 Location: 7600rpm Local Time: 05:45 PM Posts: 699 Offline	Quote: Originally Posted by alski (original) yep and not by much...think about it, 380cc injectors, pully, upgraded ecu, air box...all this would be giving a lot more than 210 if the head was any good or to put another way if your offered one foc i doubt if the gain would be worth the fitting cost Cheers,thats what I thought as the gain with the head fitted wouldn't be much, just wanted re-assuring for future debate with dealer

Mar 29th, 2008, 10:54 PM	#4 (permalink)
black20vt MINI2 Regular My Classifieds Join Date: Mar 2007 Location: Huntingdon Local Time: 05:45 PM Posts: 50 Offline	Quote: Originally Posted by alski (original) yep and not by much...think about it, 380cc injectors, pully, upgraded ecu, air box...all this would be giving a lot more than 210 if the head was any good or to put another way if your offered one foc i doubt if the gain would be worth the fitting cost Not sure that it isn't any good., depends on what you are doing with the car. I have std injectors, std ecu ?, (pre facelift JCW). GTT CAI, Manifold and intercooler and it puts out 233 (thats on 11% pulley remember).Plus its better fuel consumption than std. The point I'm making is that you have to allow the head to breathe for it to become effective. When I first got the car it was bog std JCW and it felt strangled above 5000rpm. Allowing it to breathe better has transformed it . However for the money there are far better head options than JCW. Thats the killer with a head - the fitting cost, and you also have to factor in the removal cost if you are planning to return to stock to sell on later.

Mar 30th, 2008, 01:39 PM	#5 (permalink)
Jaw_F430 MINI2 Senior Join Date: Jul 2007 Location: 7600rpm Local Time: 05:45 PM Posts: 699 Offline	Quote: Originally Posted by black20vt (original) Not sure that it isn't any good., depends on what you are doing with the car. I have std injectors, std ecu ?, (pre facelift JCW). GTT CAI, Manifold and intercooler and it puts out 233 (thats on 11% pulley remember).Plus its better fuel consumption than std. The point I'm making is that you have to allow the head to breathe for it to become effective. When I first got the car it was bog std JCW and it felt strangled above 5000rpm. Allowing it to breathe better has transformed it . However for the money there are far better head options than JCW. Thats the killer with a head - the fitting cost, and you also have to factor in the removal cost if you are planning to return to stock to sell on later. thats good power on 11% pulley, can you post the dyno sheet? You are right though there are better heads out there, thats why I have bought the RMW head- work of art!!

Mar 31st, 2008, 10:42 PM	#7 (permalink)
black20vt MINI2 Regular My Classifieds Join Date: Mar 2007 Location: Huntingdon Local Time: 05:45 PM Posts: 50 Offline	Quote: Originally Posted by Jaw_F430 (original) thats good power on 11% pulley, can you post the dyno sheet? You are right though there are better heads out there, thats why I have bought the RMW head- work of art!! http://www.mini2.com/forum/engine-dr...ml#post3382730 that should work.. The RMW head should be renamed the Borg head - as resistance is futile I need to sort suspension first as I can't get all the power down on bumpy b roads - maybe that's too much to ask though ?

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