Fordmods Logo

1.72 or 1.6 roller rockers 

 

Page 1 of 1 [ 8 posts ] 

 
 Post subject: 1.72 or 1.6 roller rockers
Posted: Sat Nov 28, 2009 11:25 am 
Getting Side Ways
Offline

Age: 31

Posts: 771

Joined: 20th Nov 2005

Ride: AU XR8 220 Manual

hi folks, i have a good cond EL XR8 ser1 with extractors, high flow cats, twin pipes and a K&N panel filter. i am looking at gaining a little more power without dissasembling the engine. i ahve heard people recommending 1.72 roller rockers with the std cam, my quetion is will they fit onto an otherwise std 5.0 and what sort of gains would i expect? also why these and not the 1.6s?

cheers
Top
 Profile  
 
 
 Post subject: Re: 1.72 or 1.6 roller rockers
Posted: Sat Nov 28, 2009 7:02 pm 
Getting Side Ways
Offline
User avatar

Age: 43

Posts: 1093

Joined: 29th Nov 2004

Gallery: 15 images

Ride: BA Ford Fairlane V8

Location: Lower Hunter Valley
NSW, Australia

1.6s are standard ratio and the 1.72 give more lift. Your best bet is to go for the 1.72s if you are only interested in removing your upper intake and rocker covers.

 

_________________

Interested in a fair go for the Hunter-New England area of NSW?

Top
 Profile  
 
 
 Post subject: Re: 1.72 or 1.6 roller rockers
Posted: Sun Nov 29, 2009 8:23 pm 
Getting Side Ways
Offline
User avatar

Posts: 633

Joined: 21st Nov 2008

Location: Melbourne
VIC, Australia

yes they will bolt on but dont expect too much gain on their own, while you have the upper manifold off you might as well either upgrade or port the lower manifold for more gains
Top
 Profile  
 
 
 Post subject: Re: 1.72 or 1.6 roller rockers
Posted: Sun Nov 29, 2009 10:53 pm 
Getting Side Ways
Offline
User avatar

Posts: 6432

Joined: 5th Nov 2004

Gallery: 6 images

Fitting 1.72 RR's will gain you a few kw at the most and you would need to spend around $550 for the RR's.

 

_________________

5.6L of carbon footprint.

Top
 Profile  
 
 
 Post subject: Re: 1.72 or 1.6 roller rockers
Posted: Sun Nov 29, 2009 11:05 pm 
Getting Side Ways
Offline

Age: 36

Posts: 508

Joined: 28th Feb 2009

Gallery: 9 images

Ride: Ed v8 fairmont wagon, wr450f

Power: 137 rwkw

i found my old car valve bounced at 5500rpm with the 1.72's in but it had a bigger cam in it but still gave it abit more response with them in.With the 1.6's would crackle off the limiter no worries....

phill
Top
 Profile  
 
 
 Post subject: Re: 1.72 or 1.6 roller rockers
Posted: Mon Nov 30, 2009 1:50 pm 
Getting Side Ways
Offline
User avatar

Age: 31

Posts: 2450

Joined: 5th Nov 2004

Gallery: 1 images

Ride: NL V8 Fairlane

Location: Sydney
NSW, Australia

taxi 5L wrote:
i found my old car valve bounced at 5500rpm with the 1.72's in but it had a bigger cam in it but still gave it abit more response with them in.With the 1.6's would crackle off the limiter no worries....

phill


Incorrect valve springs; weren't capable of the lift you had with the rockers and cam.

 

_________________

There are 10 types of people in this world.
Those who know binary and those who don't.

Top
 Profile  
 
 
 Post subject: Re: 1.72 or 1.6 roller rockers
Posted: Mon Nov 30, 2009 2:03 pm 
Fordmods Addict
Offline
User avatar

Age: 31

Posts: 7958

Joined: 1st Jun 2005

Gallery: 13 images

Ride: Falcon

Power: 237 rwkw

Location: Melbourne
VIC, Australia

if you are going to get roller rockers anyway you may as well get the 1.7s.

 

_________________

ED XR8 Sprint - S-Trim, V500, 249rwkw
BF MKII F6 Tornado - 237rwkw

Top
 Profile  
 
 
 Post subject: Re: 1.72 or 1.6 roller rockers
Posted: Tue Dec 01, 2009 9:41 am 
Getting Side Ways
Offline
User avatar

Age: 64

Posts: 3552

Joined: 7th Nov 2004

Gallery: 4 images

Power: 482 rwkw

Location: Penrith
NSW, Australia

Steady ED wrote:
if you are going to get roller rockers anyway you may as well get the 1.7s.

Yep as in GT's and Sprint engine.. Some of the Tickford TE's also..
1:72 rockers on std cam is actually more agressive than Sprint cam..

 

_________________

As in ZOOM 126 edition
331 Dart block,3.25/ 4340 steel crank, Oliver rods,TFS ported track heat heads, TFS track heat inlet Twin SC61 turbo's
Project 1UZ-EF has started.. S475 Turbo 4.0 V8 Mustang Celica.....

Top
 Profile  
 
Display posts from previous:
Sort by  
 Page 1 of 1  [ 8 posts ] 

Who is online

Users browsing this forum: Google [Bot] and 13 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 Mon Dec 18, 2017 4:15 pm All times are UTC + 11 hours

 

 

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