Is there a noticable gain between JDM and UKDM AVCS?
#1
Is there a noticable gain between JDM and UKDM AVCS?
As above really chaps, looking at fitting AVCS heads to my v3 classic as its having the new engine built, is there much difference to be had by going for jdm heads over ukd heads?
I appreciate that the JDM have "large ports" and slightly better cams?
I am going 1+mm oversized exhaust valves and some light porting etc along with dual springs and titanum retainers etc, so will this negate alot of the benefit over the JDM heads?
I will use the standard cams that come with the heads.
So JDM or UKDM>
I appreciate that the JDM have "large ports" and slightly better cams?
I am going 1+mm oversized exhaust valves and some light porting etc along with dual springs and titanum retainers etc, so will this negate alot of the benefit over the JDM heads?
I will use the standard cams that come with the heads.
So JDM or UKDM>
#3
This is what I was thinking, that the cams will give a slight benefit, but seeing as JDM heads command a £2-300 premium over the UKDM ones, thats half way to the cost of a set of cams anyway and I could get something specifically made for my car, not something designed for a 300hp engine!
Trending Topics
#8
Scooby Regular
iTrader: (11)
Join Date: Feb 2011
Location: Newcastle upon tyne
Posts: 2,750
Likes: 0
Received 0 Likes
on
0 Posts
Just to add , smaller port heads are designed for low end torque & throttle response wich is what the 2.5 plays
Were as a JDM big port volumes allow more flow at higher RPM's IE 8000 rpm redline opposed to the lower RPM variant cars
Regards
Were as a JDM big port volumes allow more flow at higher RPM's IE 8000 rpm redline opposed to the lower RPM variant cars
Regards
#9
Former Sponsor
Join Date: Aug 2012
Location: Holywell
Posts: 571
Likes: 0
Received 0 Likes
on
0 Posts
If you could see a Prodrive WRC head, it's based on a V4 head but they cast their own and modify the ports to have smaller inlets, strangley enough the UK new age heads are the same size and shape :-0
I believe it's because there is a big difference between the flow volume inlet/exh on the jdm large port and smaller ports balances things up.
A wrc engine only makes mid 300's but designed for torque of course.
I believe it's because there is a big difference between the flow volume inlet/exh on the jdm large port and smaller ports balances things up.
A wrc engine only makes mid 300's but designed for torque of course.
#10
Scooby Regular
iTrader: (3)
If you could see a Prodrive WRC head, it's based on a V4 head but they cast their own and modify the ports to have smaller inlets, strangley enough the UK new age heads are the same size and shape :-0
I believe it's because there is a big difference between the flow volume inlet/exh on the jdm large port and smaller ports balances things up.
A wrc engine only makes mid 300's but designed for torque of course.
I believe it's because there is a big difference between the flow volume inlet/exh on the jdm large port and smaller ports balances things up.
A wrc engine only makes mid 300's but designed for torque of course.
#11
18 June 1815 - Waterloo
iTrader: (31)
My JDM WRX Blobeye as the AVCS heads as standard and it is a much better and tuneable car than the UK Newage cars I had before.
The JDM car is 250 PS with torque at 245 ftlbs @ 6000 rpm
The UK car is 225 PS with torque at 221 ftibs @ 5600 rpm
Mine as been mapped by Bob Rawle and makes 300 bhp.
The JDM car is 250 PS with torque at 245 ftlbs @ 6000 rpm
The UK car is 225 PS with torque at 221 ftibs @ 5600 rpm
Mine as been mapped by Bob Rawle and makes 300 bhp.
Thread
Thread Starter
Forum
Replies
Last Post
Mattybr5@MB Developments
Full Cars Breaking For Spares
28
28 December 2015 11:07 PM
Mattybr5@MB Developments
Full Cars Breaking For Spares
12
18 November 2015 07:03 AM