|
10-16-2002, 06:35 PM
|
#1 |
|
Forever Grateful
Join Date: Mar 2001
Location: Forney,Texas
Posts: 779
|
flat tappet cam
wht are the pro's & con's on ths type of cam????
__________________
R.I.P Dad 04-07-42 - 05-27-09 |
|
|
|
10-16-2002, 11:23 PM
|
#2 |
|
Registered User
Join Date: Dec 1999
Location: Austin, TX, USA
Posts: 7,728
|
A flat tappet cam is just the style cam SBC has had since the beginning. There is hydraulic and solid. The larger the diameter, the more aggresive the cam can be. (NASCAR still uses mechanical flat tappet cams, but they are "mushroomed" with a big head for FAST ramp profiles approaching those of a roller cam) Roller cam is frictionless for the most part and worth a little efficiency, but heavy weight of hydraulic roller makes for lower rpm range (relative) to a mechanical roller. I could go on, but you need to be more specific...
__________________
44 Willys MB 52 M38A1 64 Corvette Coupe 68 Camaro 'vert LT1 & TH700 69 Z/28 355 12.6's @110 69 Chevy Short Step 4 1/2"/7" drop 72 Jimmy 4WD 4spd 4" & 35's 02 GMC 2500HD 4x4 Duramax |
|
|
|
|
10-17-2002, 05:01 AM
|
#3 |
|
Green club
Join Date: May 2002
Location: Central CA
Posts: 1,059
|
Ya, Mike is right on. The pro's to this style of cam is simplicity/low cost.
The con's are limited cam profiles when you start getting in the upper ranges of lift and duration. I think NASCAR uses the mechanical cam still because of rules. I am not a huge NASCAR fan, but I belive this is the only reason. Otherwise they would most likely be running solid rollers for better fuel efficiency at the racetrack. My guess anyway, I am sure someone will chime in here with the correct answer 
__________________
71 short/fleet ECE 4/6 drop, LQ4/700r4/3.42 gears 70 SS396 Chevelle 427/200-4R/3.73posi 61 Lincoln Continental, black on black Son you are going to drive me to drinkin if you don't stop drivin that hot rod lincoln |
|
|
|
 |
| Bookmarks |
|
|
Linear Mode
