When is it recommended to use an offset lifter instead of a centerline lifter?

 

If you have to ask, you don't need offset lifters. They are for exotic heads that have had the pushrods relocated to maximize airflow.

Rich

 

Some of the larger more exotic race heads have different valve spacing and require offset lifters to correctly orient valve train geometry. For example, my SB2 heads are going to use a .150" offset lifter to make the pushrod angle right. 90% of the stuff you'll see for a sbc will be standard and almost everything you need for an LT1 will be standard.

 

What about the AFR 227. I am going to run a jesel shaft mount rocker which is made for the 60/40 valve spacing. Would this require an offset lifter?

 

I don't know if the 227's are on a different spacing than my AFR 220's, but the 220's are borderline. I'm using std centered lifters and rockers, but could have went with offset and had slightly better geometry.

 

AFR only requires offset liftes on their 215RRs (.180" offset). Offset stud girdles are recommended for the 220 & 227 heads though (i.e. not required).

 

Yes you would want the offsets if you're actually gonna buy that Jesel set and you have to choose the intake offset when you order, Call me as I am a JESEL dealer as well as being a sponsor here. Get the ones offset .350 or .450 (Damn cant remember right now!) and the .150 offset lifters for the intakes so you can run some real pushrods. 90 percent do this but as has been said you don't "have" too in order to run but the 227s are different valve spacing and so are the 215RR heads and they use the exact same stands too.

 

michael,
mine aren't offset. i ordered the SS shaft mounts last year right from jesel.

just my .02

 

i seen a set of offset solid roller lifters for sale on e bay, can they be used with no other supporting parts, will the slight angle hurt anything at high rpm or any rpm

 

I would strongly recommend not buying offset lifters and just trying to make them work. Proper valvetrain geometry is crucial to making everything stay together. Offset lifters should only be used if you have to.

 

It is better to get the correct shaft rockers than offset lifters. Sometimes they are required to take the angle out of the push rod.
A little angle won't hurt,look at a BB Ford or Chevy.
If you are planning to shift at 9,500 then the straighter the better.

No,the AFR 227 don't need offset anything. The rockers will set at an angle to the head like a TFS head on a Ford.

 

1RacerDude,

If offset rockers are not required on a AFR227, why is it it requires an offset stud girdle? Maybe I just dont understand.

Michael

 

Go to AFR's sight and see. The valve spacing is different than a 210,ect,the rockers sit at an angle to the head like a TFS on a Ford.
The studs are in a different place than the valves,hence the angle of the rockers.
The studs are not directly behind the valve and a standard girdle would not let you install the valve covers.One end on each head would be sticking out over the gasket boss.

 

AFR 215cc RR heads. Note the position of the intake valves in relation to the intake ports.
http://home.gci.net/~jimlab/images/H...d/P1020025.jpg
http://home.gci.net/~jimlab/images/H...d/P1020031.jpg

Offset lifters (0.180" intake) and rockers (0.450" intake, 0.100" exhaust).
http://home.gci.net/~jimlab/images/Misc/P6200017.jpg
http://home.gci.net/~jimlab/images/E...d/P1190101.jpg

According to the Crower catalog, the AFR 220s and 227s use the same rocker offset and the 180s and 210s have a 0.250" intake offset.

 

The AFR227s have offset valve locations and to get the most correct geometry is why you use the offset lifters too! You guys are getting confused and you're also believing the AFR catalogue is right! The 227 and 215RR have the same stands in REALITY but not in the catalogues.