Fordmods Logo

camshafts -auto v manual 

 

Page 1 of 2 [ 20 posts ] Go to page 1, 2  Next

 
 Post subject: camshafts -auto v manual
Posted: Wed Apr 19, 2006 11:00 am 
Tyre Shredder
Offline

Posts: 311

Joined: 3rd Jan 2006

Location: tauranga
New Zealand

been talking to an experienced dyno guy ova here in nz and he reckons pretty much a waste of time changing cam with an auto ,reckons you lose to much down low ,i think this would be true if you went wild wat do you guys reckon :?
Top
 Profile  
 
 
Posted: Wed Apr 19, 2006 11:04 am 
Getting Side Ways
Offline
User avatar

Age: 42

Posts: 8655

Joined: 5th Nov 2004

Gallery: 37 images

Ride: V8 EF Futura

Location: Adelaide CBD
SA, Australia

That's what hi stall torque converters are for :)

 

_________________

I promise..... I will never die.

Fordmods Administration Group MINOR PUNKED

Top
 Profile  
 
 
Posted: Wed Apr 19, 2006 11:21 am 
Tyre Shredder
Offline

Posts: 311

Joined: 3rd Jan 2006

Location: tauranga
New Zealand

yer but if you didnt wanna go that far?
Top
 Profile  
 
 
 Post subject: cam shafts
Posted: Wed Apr 19, 2006 9:27 pm 
Smokin em up
Offline

Age: 53

Posts: 282

Joined: 4th Jun 2005

Gallery: 9 images

Ride: ef xr8

Location: Northern
NSW, Australia

I think you should stop listening to him.I've achieved 170rwkw's with basically a standard stall converter.2800rpm dominator on its way.

 

_________________

----------------------------------------------------
FOR SALE;EF 5.0 auto ecu with tweecer $600
----------------------------------------------------

Top
 Profile  
 
 
Posted: Wed Apr 19, 2006 9:55 pm 
Getting Side Ways
Offline

Posts: 3025

Joined: 28th Oct 2005

Gallery: 13 images

Ride: BA MKII XR8

Location: Caroline Springs
VIC, Australia

I've also heard stories of hunting too...

Still, 9.5 out of 10 high high powered stip lovin Falcs run autos (BTR 4 speeder included), so I don't know...
Top
 Profile  
 
 
Posted: Wed Apr 19, 2006 10:25 pm 
Getting Side Ways
Offline

Posts: 1162

Joined: 19th Jun 2005

Location: perth sor
WA, Australia

depends how big of a cam u go...

theres millions of variables in cam selection.. so a general comment like that applies, but u really gotta research to get a definate..

 

_________________

current ride: worn out chuck taylors

Top
 Profile  
 
 
 Post subject: Re: camshafts -auto v manual
Posted: Wed Apr 19, 2006 10:42 pm 
Getting Side Ways
Offline

Age: 44

Posts: 661

Joined: 2nd Dec 2004

Ride: AU XR8

Location: Wollongong
NSW, Australia

fairy v8 wrote:
been talking to an experienced dyno guy ova here in nz and he reckons pretty much a waste of time changing cam with an auto ,

biggest load of s**t ever
Top
 Profile  
 
 
 Post subject: Re: camshafts -auto v manual
Posted: Thu Apr 20, 2006 12:38 am 
Parts Gopher
Offline
User avatar

Age: 47

Posts: 75

Joined: 19th Jan 2006

Ride: Fairlane

Location: Hollinger
NSW, Australia

fairy v8 wrote:
been talking to an experienced dyno guy ova here in nz and he reckons pretty much a waste of time changing cam with an auto ,reckons you lose to much down low ,i think this would be true if you went wild wat do you guys reckon :?


alot of the off street drag racing boyz are running 2 speed powerglides, rebuilt trimatics, strengthened C4s, C10's, torqueflights, you name it.... autos are great for drag racing especially when prepared right...if cams do bog it down, the car doesn't really give a rats a*** since there are probably 3.9 or 4.11 gears and a stall convertor to over ride the so called lost power down low. Then there is NOS.....

 

_________________

TEAM FAT RACING

TEAM LWB

Copyright (c) 2006 Landbarge Racing. FAIRLANE and COBRA are registered trademarks owned and licenced by Ford Motor Company.

Top
 Profile  
 
 
Posted: Thu Apr 20, 2006 2:06 am 
Getting Side Ways
Offline
User avatar

Age: 45

Posts: 1440

Joined: 7th Nov 2004

Ride: 320kw BA XR8

Location: Adelaide
SA, Australia

In many cases what your mechanic said is true, however the popular 5L Windsor cams available these days generally improve low end torque as well as top end power. Stick with the well known cams like the Crane 2020, 2031, 2030, along with some of the Crow and Comp cams and you should be fine with the auto.
Top
 Profile  
 
 
Posted: Thu Apr 20, 2006 10:42 am 
Getting Side Ways
Offline
User avatar

Age: 42

Posts: 8655

Joined: 5th Nov 2004

Gallery: 37 images

Ride: V8 EF Futura

Location: Adelaide CBD
SA, Australia

downingj wrote:
I've also heard stories of hunting too...

Still, 9.5 out of 10 high high powered stip lovin Falcs run autos (BTR 4 speeder included), so I don't know...


Chronic hunting will be an issue for the 6 cylinder running an agressive cam due to the way it measures air entering the engine. Not a huge problem for the V8 (to a point lol).

 

_________________

I promise..... I will never die.

Fordmods Administration Group MINOR PUNKED

Top
 Profile  
 
 
Posted: Thu Apr 20, 2006 1:04 pm 
Tyre Shredder
Offline

Posts: 311

Joined: 3rd Jan 2006

Location: tauranga
New Zealand

yer this guy was saying when the au first came out and i think cam profiles have come along way since then quite like look of comp cams xe270hr .544 lift in-ex which is quite high lift and 218 in 224 ex @0.50 spose to work from 2000 rpm up thought about goin next one down but duration is sim to stock one with a bit more lift which i dont think there would be much gain wadda ya reckon,has anybody usedthe xe270hr :?:
Top
 Profile  
 
 
Posted: Thu Apr 20, 2006 7:50 pm 
Getting Side Ways
Offline
User avatar

Posts: 6432

Joined: 5th Nov 2004

Gallery: 6 images

That comp cam valve lift is high but would really suit a high flowing pair of heads. What heads have you got?

 

_________________

5.6L of carbon footprint.

Top
 Profile  
 
 
Posted: Thu Apr 20, 2006 8:52 pm 
Getting Side Ways
Offline

Posts: 1162

Joined: 19th Jun 2005

Location: perth sor
WA, Australia

i was gonna go for hte xe270hr but figured the 274 would be more suited to me.. (ie a draggin, burnout chuckin, rev head)

i was gonna get 1.6 rockers, as the 35-351-8(270) cam was suited to them, and gave .512 lift.

 

_________________

current ride: worn out chuck taylors

Top
 Profile  
 
 
Posted: Thu Apr 20, 2006 8:57 pm 
Getting Side Ways
Offline
User avatar

Posts: 6432

Joined: 5th Nov 2004

Gallery: 6 images

I've noticed that the flow through a pair of stock GT40P's is about at its best under .500 lift. I reckon that unless you port them, any valve lift over .500 will have minimal gains with a high lift cam.

 

_________________

5.6L of carbon footprint.

Top
 Profile  
 
 
Posted: Thu Apr 20, 2006 8:58 pm 
Getting Side Ways
Offline

Posts: 1162

Joined: 19th Jun 2005

Location: perth sor
WA, Australia

^ theres a dude i nthe stats pullin 390rwhp off that cam, the bbk ssi intake, and afr165 heads..

 

_________________

current ride: worn out chuck taylors

Top
 Profile  
 
Display posts from previous:
Sort by  
 Page 1 of 2  [ 20 posts ]  Go to page 1, 2  Next

Who is online

Users browsing this forum: Google Adsense [Bot] and 20 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 Fri Mar 29, 2024 7:03 pm All times are UTC + 11 hours

 

 

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