JWT Roller Cams

I know that many of you have this subject near and dear to your hearts. This was just posted to the SE-R Mailing List by Rob Cadle who has been heavily involved with thier cam testing.

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>And I don't think there are any cams to work with the roller rockers
>yet either.


Not yet. But JWT has prototyped a set of S-3's for the roller motor. I
have seen the dyno results from the first prototype, and they work very
well. I think JWT is going to do some more testing, but expect these cams to be available in the next 4-6 months.

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So, it looks like they won't be available for a little while yet, but they should be pretty doggone good when they are. Worth waiting for.

Question for you guys that know internals better than me or most peeps...whats the difference between the new SR20 with roller rockers and the older one without? How do they work, etc? :)

Originally posted by A380Driver
Question for you guys that know internals better than me or most peeps...whats the difference between the new SR20 with roller rockers and the older one without? How do they work, etc? :)

Aren't you following the discussion on the SE-R List? I thought you were there.......

Anyway, the main differences are the roller rockers, the crank has be lightened and it doesn't have the bearing support (girdle).

The crank and lack of girdle is supposed to be good for around 8 hp according to Andreas Miko. I believe this guy. If you don't know who he is, he built a drag racing SE-R that over a year ago shattered the SE-R 1320 record for someone outside the US. It made that time after shutting down for something like the last 300'! :eek: It made the run and was promptly shipped to its destination.

Originally posted by P10DET


Aren't you following the discussion on the SE-R List? I thought you were there.......


I'm trying to follow it :) but im definatly a stupid monkey heh


Anyway, the main differences are the roller rockers, the crank has be lightened and it doesn't have the bearing support (girdle).


See I dont know too much about whats inside to know where or what the roller rockers do/look like/work etc... guess im just trying to get a basic lesson in engine mechanics.

Originally posted by A380Driver
I'm trying to follow it :) but im definatly a stupid monkey heh


No you're not. We just need to bring you up to speed. :)

Originally posted by A380Driver
See I dont know too much about whats inside to know where or what the roller rockers do/look like/work etc... guess im just trying to get a basic lesson in engine mechanics.

OK, this photo shows the rockers. The contrast is a little high unfortunately, but they are near the bottom - they have a shinny pad with dark oil stained fingers that set on the valves.

http://home.earthlink.net/~geo3/naked14.jpg

Here is the full article:

http://home.earthlink.net/~geo3/GettingNaked.htm

And the Table of Contents for the series (in case you want to learn more about building an SR20):

http://home.earthlink.net/~geo3/beast-toc.htm