Is crower baby cam legal in NRMA F/S? - Ford Mustang Forums : Corral.net Mustang Forum
 
LinkBack Thread Tools Display Modes
post #1 of 8 Old 06-18-2003, 10:17 PM Thread Starter
Registered User
 
Trader Feedback: (0)
Join Date: Jul 2000
Location: Long Island
Posts: 59
Is crower baby cam legal in NRMA F/S?

I think not, but wanted a second opion. here are the specs:

crower 15510
Grind lobe center 114
adv duration: 275/275
duration at .050: 212/212
lift at 1.6: .531/.531

NRMA F/S rules:

5.0 Engines – .480” maximum valve lift (checked at retainer) and below specified lobe durations and lobe separation angles

Note: Lobe duration is checked at the below specified lobe lifts.

Lobe lift Maximum duration

.050” -- 211

.100” -- 179

.150” -- 148

.200” -- 115



Maximum lobe separation angle – 117 degrees, Minimum lobe separation angle – 115 degrees


thnaks, JP

White90Coupe is offline  
Sponsored Links
Advertisement
 
post #2 of 8 Old 06-18-2003, 10:41 PM
Registered User
 
SKYWLKR's Avatar
 
Trader Feedback: (1)
Join Date: Apr 2000
Location: Baton Rouge LA
Posts: 1,110
Um I would say NO ,being it has .531 lift.....

are you asking somthing else?


89 LX 5.0: 342 Performer 5.0's, GT-40 [email protected] & [email protected] on 100 shot
Monster Miata: 5.0 stock motor,times soon
LSB e46 M3 Vert: [email protected]
SKYWLKR is offline  
post #3 of 8 Old 06-18-2003, 10:51 PM Thread Starter
Registered User
 
Trader Feedback: (0)
Join Date: Jul 2000
Location: Long Island
Posts: 59
well, here are my 2 concerns:

crower states duration at .050 is 212, and the rules say 211.

and

crower states lift at 1.6 is .531 and the rules state 480.

Am I missing something, I'm a little green in this area.

thanks
White90Coupe is offline  
Sponsored Links
Advertisement
 
post #4 of 8 Old 06-18-2003, 11:29 PM
Registered User
 
Fomoco347's Avatar
 
Trader Feedback: (4)
Join Date: Nov 2001
Location: NJ
Posts: 1,586
no, it wont work

nashootout.com
MCRP.us
Fomoco347 is offline  
post #5 of 8 Old 06-19-2003, 09:02 AM
Moderator
 
Jeff88coupe's Avatar
 
Trader Feedback: (12)
Join Date: Apr 2000
Location: Cincinnati, OH
Posts: 4,226
No...it's not legal..when they mean stock cam lobe...they mean stock cam.


To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.

Xtreme 8.5" -Heads up 1/8th mile limited 8.5 class at Kilkare Dragway
Dedpedal Racing;Sponsered by
To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.
;Tuned by
To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.

Boss block Big bore 347/225 TFS HP's/SR/BW S476R/A2W/PG/FAST xfi on E85
5.33 at 134.9 on 26x8.5 in 1/8th @3380#
Jeff88coupe is offline  
post #6 of 8 Old 06-20-2003, 02:07 PM
Registered User
 
Mike Gager's Avatar
 
Trader Feedback: (1)
Join Date: Nov 1999
Location: ToPeKa, KaNsAs
Posts: 1,158
F/S is intended for the stock HO camshaft

only reason they provide the cam data is for the racers to confirm their stock cams will be legal

it does open up the possibility of having a custom cam ground to those specs but why waste the money? its still gonna be a stock cam profile
Mike Gager is offline  
post #7 of 8 Old 06-20-2003, 02:49 PM Thread Starter
Registered User
 
Trader Feedback: (0)
Join Date: Jul 2000
Location: Long Island
Posts: 59
I agree with mike g. I would think running a set of 1.7 RR would be more beneficial and cheaper than having a custom cam made.

I think for the money, more ET's could come quicker on other mods.
White90Coupe is offline  
post #8 of 8 Old 06-20-2003, 06:45 PM
Registered User
 
Mike Gager's Avatar
 
Trader Feedback: (1)
Join Date: Nov 1999
Location: ToPeKa, KaNsAs
Posts: 1,158
well the point of my post was the NMRA opened up the possibility for racers to have a cam manufacturer make them a cam IDENTICLE to the factory 100% stock camshaft

the reasoning for this is because they were finding that some of the stock cams were very far out of specs from others. the above numbers are what a stock cam SHOULD BE. providing the specs allows a racer to have a custom cam ground to those specs which makes it sure it is 100% legal rather then trying 10 different stock cams to find one that falls within those specs legally

my point was if you have the time to try a couple different stock cams to find one that will work why waste your money on the custom "stock" cam

there is NO modifications allowed to the cams stock or custom from those specs, im not sure if you fully realize that yet, it has nothing to do with whether they run 1.7 rockers or not. the stock cam with 1.6 rockers has 0.444" lift, that means the cam lobe lift is approximately 0.278" the lobe lift has to be this amount regardless of what rocker arm they are using. the reason they list 0.480" max is because the stock cam with 1.7 rockers is going to have a max lift of 0.472" they also make a 1.72 (0.477") and even a 1.73 ratio rocker arm (0.480") the max 0.480" lift rule allows the 1.73 ratio rockers arms as the maximum allowed

i suggest you take a look at the NMRA Factory Stock rule book if you are thinking of building a car

it can be found at the NMRA site

http://www.nmraracing.com
Mike Gager is offline  
Sponsored Links
Advertisement
 
Reply

Bookmarks

Quick Reply
Message:
Options

Register Now



In order to be able to post messages on the Ford Mustang Forums : Corral.net Mustang Forum forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.

User Name:
Password
Please enter a password for your user account. Note that passwords are case-sensitive.

Password:


Confirm Password:
Email Address
Please enter a valid email address for yourself.

Email Address:
OR

Log-in










Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page
Display Modes
Linear Mode Linear Mode



Posting Rules  
You may post new threads
You may post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On

 
For the best viewing experience please update your browser to Google Chrome