Russ Collins RC 388 camshaft Identification

gd4now
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Re: Russ Collins RC 388 camshaft Identification

06 Sep 2020 08:55

#834480

There is a great ,IMO, write up you can download here kzrider.com/filebase/download/27-general...egreeing-for-zombies

1977 KZ650 B1
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asphalt900
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Re: Russ Collins RC 388 camshaft Identification

09 Sep 2020 02:54

#834641

For those who showed interest in the RC 388 cams. Because they were not and are not mine i returned them to the owner. He has them listed on ebay now, just enter Russ Collins and you will find them.

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gd4now
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Re: Russ Collins RC 388 camshaft Identification

09 Sep 2020 10:11 - 09 Sep 2020 10:19

#834652

For more info on cams I found this link of interest as well.
www.motorcycleproject.com/text/camshafts.html
motorcycleproject.com/text/lobectr.html

1977 KZ650 B1
Pods and Denco header

OLD KAW OWNERS SMILE ALOT

Last edit: 09 Sep 2020 10:19 by gd4now.

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Mikaw
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Re: Russ Collins RC 388 camshaft Identification

10 Oct 2020 14:35 - 10 Oct 2020 14:36

#836574

Good, bad, or indifferent I’m the owner of these cams. I have been scouring the Internet looking for any information at all about RC engineering. To my surprise I came across an article written by a gentleman named Tom McCarthy, were sons of Russ Collins are restoring their dads Honda drag bikes. I have reached out to Tom in hopes to connect with one of the brothers and ask if they have and records or specs on this cam and the other R.C. Cam I have. I’ll keep you posted.

www.dragbike.com/collins-cooper-past-becoming-future/

1976 KZ 900 A4 kzrider.com/forum/11-projects/613548-1976-kz-900-a4
1976 KZ 900 B1 LTD
1978 KZ 1000 B2 LTD
1980 KZ 750 E1
Kowledge Speaks, But Wisdom Listens.
Jimi Hendrix.

Last edit: 10 Oct 2020 14:36 by Mikaw. Reason: Spelling

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Mikaw
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Re: Russ Collins RC 388 camshaft Identification

10 Oct 2020 15:46

#836580

I measured the base circle and appears to be the stock 1.110 diameter. Subtracting that from the lobe height I get about a .409 lift. Really all I can do. Is there a way to measure out the duration without putting them in an engine and all. Can they possibly be sent to a Web or APE type of company and have them run the numbers

1976 KZ 900 A4 kzrider.com/forum/11-projects/613548-1976-kz-900-a4
1976 KZ 900 B1 LTD
1978 KZ 1000 B2 LTD
1980 KZ 750 E1
Kowledge Speaks, But Wisdom Listens.
Jimi Hendrix.

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Re: Russ Collins RC 388 camshaft Identification

10 Oct 2020 20:18

#836592

Mikaw wrote: I measured the base circle and appears to be the stock 1.110 diameter. Subtracting that from the lobe height I get about a .409 lift. Really all I can do. Is there a way to measure out the duration without putting them in an engine and all. Can they possibly be sent to a Web or APE type of company and have them run the numbers

The service manual shows a setup for measuring the camshaft runout. This is most of the way to what you'd need. They show two V-blocks and a dial indicator on a stand. If you figured out some way to stick a degree wheel to the end of the camshaft, you should be able to see where the lift is 0.050" on each side of the lobe, and record the start and end angle. Maybe?

www.summitracing.com/parts/sum-g1056-16

It seems pretty unlikely they still have what you need, but have you tried to contact the current version of RC?

www.rcfuelinjection.com/History

'78 Z1-R in blue , '78 Z1-R in black, '78 Z1-R in pieces
My dad's '74 Z1
'00 ZRX1100

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Mikaw
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Re: Russ Collins RC 388 camshaft Identification

11 Oct 2020 08:34

#836614

Great information DOHC. Thank you

1976 KZ 900 A4 kzrider.com/forum/11-projects/613548-1976-kz-900-a4
1976 KZ 900 B1 LTD
1978 KZ 1000 B2 LTD
1980 KZ 750 E1
Kowledge Speaks, But Wisdom Listens.
Jimi Hendrix.

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KZB2 650
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Re: Russ Collins RC 388 camshaft Identification

11 Oct 2020 11:34 - 11 Oct 2020 11:44

#836619

"Finally" found my RC eng catalog from 1980 and it has your cam listed.

RC388 (900/1000)/ RC410 (650)
A high-lift "Hot Street" class cam that provides a marked increase in acceleration and torgue. Ideal for the street class racer who wants more power without the radical characteristics of a full race cam.

Total duration: 298 degree's
Lobe centers 108 degree's
Lift: .416" intake.......... .416" exhaust
Lash: .004 in........... .006 ex They guarantee 100% accuracy backed by 10 years of record breaking performance and that each cam is "Parkerized" but I'm sure that's long gone. by now. No more specs other than that except At the end it states it recommends their lightened cam followers and all cams except the 370 requires head notching for cam lobe clearance.... And yes you were pretty darn close when you said .409 lift so good job on that.

Where is Zucdave he needs this for his 650.:woohoo:

1978 KZ650 b-2
700cc Wiseco kit 10 to 1.
1980 KZ750 cam, ape springs, stock clutch/ Barnett springs.
Vance and Hines Header w/ comp baffle and Ape pods, Dyna S and green coils, copper wires.
29MM smooth bores W/ 17.5 pilots, 0-6s and 117.5 main
16/42 gearing X ring chain and alum rear JT sprocket.

Last edit: 11 Oct 2020 11:44 by KZB2 650.

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Mikaw
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Re: Russ Collins RC 388 camshaft Identification

11 Oct 2020 12:05

#836620

KZB2 650 wrote: "Finally" found my RC eng catalog from 1980 and it has your cam listed.

RC388 (900/1000)/ RC410 (650)
A high-lift "Hot Street" class cam that provides a marked increase in acceleration and torgue. Ideal for the street class racer who wants more power without the radical characteristics of a full race cam.

Total duration: 298 degree's
Lobe centers 108 degree's
Lift: .416" intake.......... .416" exhaust
Lash: .004 in........... .006 ex They guarantee 100% accuracy backed by 10 years of record breaking performance and that each cam is "Parkerized" but I'm sure that's long gone. by now. No more specs other than that except At the end it states it recommends their lightened cam followers and all cams except the 370 requires head notching for cam lobe clearance.... And yes you were pretty darn close when you said .409 lift so good job on that.

Where is Zucdave he needs this for his 650.:woohoo:

Awesome. Is the duration advertised or at 50?

1976 KZ 900 A4 kzrider.com/forum/11-projects/613548-1976-kz-900-a4
1976 KZ 900 B1 LTD
1978 KZ 1000 B2 LTD
1980 KZ 750 E1
Kowledge Speaks, But Wisdom Listens.
Jimi Hendrix.

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Re: Russ Collins RC 388 camshaft Identification

11 Oct 2020 12:07 - 11 Oct 2020 12:08

#836621

Cool. That's great that you found that info. Do the specs say what amount of valve lift was used for the duration measurement?

So at 0.416" and 298, the RC388 isn't too far away from the Andrews 3X, at 0.418 and 282 (measured at 0.030"). The Web 218 grind is also similar, at .418 and 280° (or 242 at 0.050").

As I noted earlier, the RC cam designer seem to really push the duration number as high as possible.

'78 Z1-R in blue , '78 Z1-R in black, '78 Z1-R in pieces
My dad's '74 Z1
'00 ZRX1100

Last edit: 11 Oct 2020 12:08 by DOHC.

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DOHC
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Re: Russ Collins RC 388 camshaft Identification

11 Oct 2020 12:11

#836624

The Web 218 grind description says "Street or turbo. Broad overall power range. Requires Shim Under Followers, and Performance Valve Spring Kit."

'78 Z1-R in blue , '78 Z1-R in black, '78 Z1-R in pieces
My dad's '74 Z1
'00 ZRX1100

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Mikaw
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Re: Russ Collins RC 388 camshaft Identification

11 Oct 2020 12:47

#836627

DOHC wrote: The Web 218 grind description says "Street or turbo. Broad overall power range. Requires Shim Under Followers, and Performance Valve Spring Kit."

RC Engineering say it can be used with SOT, but recommended their lightened buckets. That's the way it was set up when Asphalt900 opened it up.

1976 KZ 900 A4 kzrider.com/forum/11-projects/613548-1976-kz-900-a4
1976 KZ 900 B1 LTD
1978 KZ 1000 B2 LTD
1980 KZ 750 E1
Kowledge Speaks, But Wisdom Listens.
Jimi Hendrix.

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