|
| Search | Car Forums | Gallery | Articles | Helper | Air Dried Fresh Beef Dog Food | IgorSushko.com | Corporate |
|
#1
06-07-2004, 07:53 PM
|
||||
|
||||
|
Modular vs. Pushrod engines
I've read a little bit on modular engines. But I still do not understand why or how they can only have 4 or 2 valves. How do they work? What is different about a modular engine? Are they all overhead cams like imports? My brother has a 4.6 Mustang GT with such and engine. When we work on it is there anything special that needs to be done?? (my engine knowledge is based off of traditional 90degree small block chevys)
__________________
 90 Camaro RS V6 - swapped to V8 -350 block, GM Vortec L31 Heads, Edelbrock Performer RPM Vortec intake, 750cfm carb, CompCams XE268 Camshaft ESTIMATED 360-420 hp 380-430lb/ft torque 
|
|
#2
06-08-2004, 10:30 AM
|
||||
|
||||
|
Re: Modular vs. Pushrod engines
They don't have only 2 or 4 valves... total. It is 2 or 4 valves per cylinder, and now even three.
They "work" by actuating the valves from one or two overhead cams per head. 2&3 valve/cyl engines use a single cam per head, while the 4V/cyl engines use two cams per head. The valves are actuated by roller followers that rest on the valve stem on one end, and a "lash adjuster" (spring loaded lifter) on the other end as a pivit point. The cam is basically centered over the middle of the follower where the roller is.
|
|
#3
06-08-2004, 03:28 PM
|
||||
|
||||
|
Re: Modular vs. Pushrod engines
So the only thing that significantly differentiates a modular engine from a typical 4 banger import is in how the cam is manipulated, chain vs. lifter? (other than the obvious # of cylinders, and rev range)
3 valves is unsual. 2 for intake 1 for exhaust?
|
|
#4
06-16-2004, 10:45 AM
|
||||
|
||||
|
Re: Modular vs. Pushrod engines
__________________
 Anything Worth Shooting, is Worth Shooting Twice Ammo is Cheap. Life is Expensive.
|
|
 |
POST REPLY TO THIS THREAD |
 |
|
|
