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L20 U20 Type B Cam?


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#1 Radim

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Posted 22 February 2011 - 01:45 PM

I searched around a bit and found nothing but information for Roadsters... the WMN stamp on the head had me wondering so i popped open the Valve Cover and looked around... U20s are stock cams right? but what about the B Stamp at the end of it?

#2 ggzilla

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Posted 22 February 2011 - 11:14 PM

U20 is applied model code probably for the L18-powered 620, but U20 parts are used by other models too.

Here are the U20 cams:
* 13001-U2010/13001-U2000 CAMSHAFT L16 620, L18 610 & 710
* 13001-22000 CAMSHAFT L20B all + L18 620
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#3 ggzilla

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Posted 22 February 2011 - 11:46 PM

I think the 220 cam is the hottest factory cam. It was on all L20Bs in USA, and is the same cam fitted to SSS 510s in Japan. Nissan Competition sold it as the "SSS" cam, the highest performing cam they sold for use with stock valve springs.

Specs: .413 inch lift, 248° degree duration

But you can get a custom camshaft (from just about any cam company) with .450" lift and a modern profile, be good for a daily driver?
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#4 Radim

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Posted 23 February 2011 - 09:23 AM

Ah kk, thanks!

Now what is the B Stamp at the end of the cam?

I have a Delta regrind, 440 lift 260 duration 109 lobe center, is it worth to swap them out?

#5 ggzilla

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Posted 23 February 2011 - 10:54 PM

the delta would probably have a noticeable increase if you keep the revs up.
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#6 banzai510(hainz)

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Posted 24 February 2011 - 10:35 AM

I find Delta regrind cams not per spec.
Avoid them next time.
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#7 Radim

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Posted 24 February 2011 - 10:41 AM

I got it second hand for 30 shipped. :P

#8 banzai510(hainz)

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Posted 24 February 2011 - 10:48 AM

Yeah I paid $33 with core apc I bought 3 of them. a 460 and 2 450 lifts.
Took to work and measured them. the 460 was about .412 the 450 were abuout 400lift.Then minus rockarm lash.
So the lift was near stock and duration looked OK. But to spenda ll that money on new rockers just to have a stock cam I said not way.

There was a stray cat in the Hood that everybody wanted to get rid off. Spraying on everybodys car tires.
I caught the cat and tied that Delta cam to the cat and throw them in the River.
(just joking)
Throw on some Weber sidedrafts, Rising Sun hood.... call it good

#9 datto510

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Posted 24 February 2011 - 11:01 AM

There was a stray cat in the Hood that everybody wanted to get rid off. Spraying on everybodys car tires.
I caught the cat and tied that Delta cam to the cat and throw them in the River.
(just joking)


No your not. Cat Killer!
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#10 67411sss

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Posted 24 February 2011 - 11:34 AM

I have a cam that has U20 and C on the end (can with a SSS set up , wonder what the difference is between B and C?
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#11 Radim

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Posted 24 February 2011 - 11:44 AM

Well i did some research and supposedly the A Stamp was for Dual SU Carbs, B Cam was for Mikuni/Webers, and C cam was a higher performance cam, but the sources came from a Roadster website so i'm not sure if it would be the same or not.

#12 67411sss

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Posted 24 February 2011 - 11:54 AM

They are roadster specs for sure. It is different for the L series cams












i
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#13 ggzilla

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Posted 24 February 2011 - 09:42 PM

Roadster came with U20 engine, but we are talking about L-series engine here.
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#14 Z chopper

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Posted 10 March 2013 - 06:01 PM

old thread I know but is there any more information as I have an A87 head with an L20b cam with U20 cast in and C stamped on the end, would the info that Radim posted above still stand for L series cams? since he got his info from a roadster website


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#15 datzenmike

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Posted 11 March 2013 - 02:48 PM

old thread I know but is there any more information as I have an A87 head with an L20b cam with U20 cast in and C stamped on the end, would the info that Radim posted above still stand for L series cams? since he got his info from a roadster website
 
 
Roadster came with U20 engine, but we are talking about L-series engine here.
 
 
They are roadster specs for sure. It is different for the L series cams


Roadster spec does not apply to L series cams.

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