Generation IV Internal Engine - The truth about Clevite Bearings

I was researching about engine bearings and found a lot of talk but no real facts, so I called Mahle and they directed me to this site,

Just thought I would share the site, it takes a while to pass a course but well worth the reading

http://www.mahlecleviteelearning.com

There is alot of talk about the H and the P, but does anyone really know the true difference

Did you know there is a

H
P
AS
K
V

Take the Clevite Learning school

http://www.mahlecleviteelearning.com

quick break out

P standard passenger car
H High Performance
AS OEM Quality Replacement
V Vandervell - Top Fuel and Funny Car
K Endurance High Performance

There is alot of talk about the H and the P, but does anyone really know the true difference

Always thought it was the chamfer, and have used a set meant for chamfered non oe journals on a stock crank before, albeit they're a bit thinner.

Narrower h series bearings won't hurt anything on stock cranks. Less contact area means less rotational friction, but less oil cushion to ride on. As long as your bearing clearances are right, you won't have a problem.

The H Series also have higher bearing crush and a better eccentricity profile than the passenger car bearings. There is supposed to be another P Series, besides the passenger car bearings, that allows the engine builder to adjust the eccentricity profile.

The H Series also have higher bearing crush and a better eccentricity profile than the passenger car bearings. There is supposed to be another P Series, besides the passenger car bearings, that allows the engine builder to adjust the eccentricity profile.

Go to the link, everything you ever wanted to know about bearings is in the bearing school link, I was amazed,

The H's are also narrow for the fileted radius on aftermarket cranks.

The H's are also narrow for the fileted radius on aftermarket cranks.

They are narrower, but the main reason is not for fileted radius, it is to reduce drag, to gain more HP,

They are narrower, but the main reason is not for fileted radius, it is to reduce drag, to gain more HP,

Doh ?

Doh ?

You can also order the bearings as narrow as you want, it showed a set of nascar bearings being around a .250 wide before they started making rules on bearing width.

They are narrower, but the main reason is not for fileted radius, it is to reduce drag, to gain more HP,

They are narrowed only on that side out of the box to clear the fillet. The non narrowed will cause big problems.

Nice info though Jalper!

Nice info though Jalper!

It was cool, on the nascar history section, they talked about how nascar put a limit on the width of the bearing, and how some teams had bearing .250 wide, they basically said that if the bearing where not wiped out by the end of the race they where to wide,

I wish I had that kind of money,

I never saw that? I know they do run narrower bearings though. That history section is on the same Clevite learning website?

I never saw that? I know they do run narrower bearings though. That history section is on the same Clevite learning website?

(temporary thread hijack)

Erik, need updates on my 502 .... you're killing me here with the wait and chasing ya down, lol :jest:
-Alex
(okay, ya'll can resume talking about bearings now :D )

I used the coated bearings and i dont think it was worth the extra money, after 3 monthes the coating on the cam bearings was lightly removed