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camshaft recommendations..
Posted by: Grandpacorvair ()
Date: January 29, 2018 12:05PM

Time to order a cam. Going with a Clarks cam...with gear. It's for use in a 1964 turbo. I just want a good running engine, not particularly interesting in squeezing every ounce of power from the engine..

What cam have you guys used? Experiences appreciated..

Kerry

Kerry Borgne
Birmingham, Michigan

1963 Spyder Convertible

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Re: camshaft recommendations..
Posted by: jjohnsonjo ()
Date: January 29, 2018 12:34PM

I just used Clarks GM 304 (repo) turbo cam in mine about two years ago. Working and driving just fine. I guess there a are hotter cams, but GM put a lot of $$$ into designing this one for these engines.

J.O.

65 Corsa Turbo Vert
79 Honda XL 500S
69 Honda CL 160 D
2010 BMW F 650 GS
2003 Bounder 36D
2013 KIA Optima SX turbo-AKA ZIPPY (wife,s car)
69 Newport Holiday Sailboat
Baja 150 dune buggy cart
Coleman HS 500 UTV
2016 KIA Sorento SXL Turbo

Bethlehem,Pa

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Re: camshaft recommendations..
Posted by: roger65180 ()
Date: January 29, 2018 04:06PM

ether the 304 or the TB 260

Roger R
Madison Wi
62 ct pg turbo
65intercooled 180 4sp,autocrosser
62 Rampy

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Re: camshaft recommendations..
Posted by: caroseiii ()
Date: January 29, 2018 04:24PM

The factory 891 cam for the 64.

Crawford

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Re: camshaft recommendations..
Posted by: vairmech ()
Date: January 29, 2018 05:08PM

I would do either the TB10 or the TB20 I sort of like the TB20.

Ken Hand
Handy Car Care
248 613 8586

Vairmech@aol.com

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Re: camshaft recommendations..
Posted by: Grandpacorvair ()
Date: January 29, 2018 08:39PM

I appreciate the comments... but remain confused. The numbers you guys posted.. "TB20, 891, TB260 don't seem to relate to what I see at Clarks, unless I am missing it.

Kerry Borgne
Birmingham, Michigan

1963 Spyder Convertible

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Re: camshaft recommendations..
Posted by: MattNall ()
Date: January 29, 2018 08:43PM

Easy...

GM replacement /304 C785


or the 260 C7722


You choose





MODERATOR
Sea Mountain, between Charleston Harbor and Coos Bay! SW Oregon Coast
Click HERE for My Website...Click HERE for My TechPages!
..............................110-PG.................................................Webered-Turbo

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Re: camshaft recommendations..
Posted by: dwitklap ()
Date: January 29, 2018 09:47PM

Clark's TB30 is very streetable and goes 141 also! Woot Woot!

Dwight Klapper Phoenix, Arizona

1966 Corsa Turbo "TFC" SCTA #3918 E/CPS
1988 Yamaha RZ350 SCTA #2918 350 M-G
1989 Honda TRX250R "Bob's"
2004 Kawasaki KX250M2
1951 Dodge B1B Pickup Fully Unrestored

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Re: camshaft recommendations..
Posted by: MattNall ()
Date: January 29, 2018 10:29PM

dwitklap Wrote:
-------------------------------------------------------
> Clark's TB30 is very streetable and goes 141 also!
> Woot Woot!


BRAGGART!! ggg





MODERATOR
Sea Mountain, between Charleston Harbor and Coos Bay! SW Oregon Coast
Click HERE for My Website...Click HERE for My TechPages!
..............................110-PG.................................................Webered-Turbo

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Re: camshaft recommendations..
Posted by: 66vairman ()
Date: January 29, 2018 11:40PM

Turbo and naturally aspirated engines breathe differently.

You want conservative overlap with a turbo for the widest torque curve preferred for a street engine. The GM 304 or a 260 works well for the street.

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Re: camshaft recommendations..
Posted by: vairmech ()
Date: January 30, 2018 04:24AM

Look at Clark's c8803!

Ken Hand
Handy Car Care
248 613 8586

Vairmech@aol.com

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Re: camshaft recommendations..
Posted by: Nickshu ()
Date: January 30, 2018 04:35AM

I have a TB-20 in my '64 turbo and I am very pleased w/ how it runs.

Nick
_______________________________________________________________________
1964 Monza Spyder Convertible #435 - Rotisserie restored - Check out my restoration thread here: [corvaircenter.com]
Recreational Mechanic/CORSA Member/COG Supporting Member/US Navy Veteran
Other fun car: Porsche 911 GT3
Boring daily drivers
Northern Colorado, USA

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Re: camshaft recommendations..
Posted by: texas yenko dude ()
Date: January 30, 2018 05:34AM

I've got a TB-20 in my 64 Spyder. It has a 150/180 hybrid turbo and 63 150 heads. It runs great.

Texas YENKO Dude
YS-070
YS-199
YS-320
Southeast of Disorder


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Re: camshaft recommendations..
Posted by: davemotohead ()
Date: January 30, 2018 06:46AM

I have a weber turbo cam I am going to run with my side draft weber carb set up.





Email me at: Dave Motohead

1960 4dr sedan caveman car
1961 Rampside (Chetside)
1962 Rampside (Barnside)
1962 Short Rampside (Shortside)
1962 Monza 700 Wagon
1963 Monza 900 coup (General Nader)

-----------------------------------
Rust Free Lancaster Ca

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Re: camshaft recommendations..
Posted by: Nickshu ()
Date: January 30, 2018 07:19AM

texas yenko dude Wrote:
-------------------------------------------------------
> I've got a TB-20 in my 64 Spyder. It has a
> 150/180 hybrid turbo and 63 150 heads. It runs
> great.


That is my exact setup! (except the hybrid turbo is still sitting here in the box waiting to go on).

Nick
_______________________________________________________________________
1964 Monza Spyder Convertible #435 - Rotisserie restored - Check out my restoration thread here: [corvaircenter.com]
Recreational Mechanic/CORSA Member/COG Supporting Member/US Navy Veteran
Other fun car: Porsche 911 GT3
Boring daily drivers
Northern Colorado, USA

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Re: camshaft recommendations..
Posted by: Timothy Shortle ()
Date: January 30, 2018 07:44AM

Looks like a very clean engine you have there DaveM. Wasn't the TB designation
come up with by Blake Swafford of Otto Parts?

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Re: camshaft recommendations..
Posted by: Wagon Master ()
Date: January 30, 2018 08:10AM


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Re: camshaft recommendations..
Posted by: gnvair ()
Date: January 30, 2018 11:27AM

You want a very wide LSA over 110 degrees which helps decrease or eliminate the over lap. Most of those aftermarket cams still have a very narrow LSA which increases over lap. Of the stock cams, the 891 has the highest LSA, but the 304 will still make big power with the right cylinder head/carb/turbo combo. The only things you might gain with off the shelf after market cams would be more valve lift. Increasing the duration just moves the power band up and hurts the bottom. Keep in mind you lose pumping ability down low with higher duration which can slow spool up.

Lee J



Edited 1 time(s). Last edit at 01/30/2018 11:28AM by gnvair.

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Re: camshaft recommendations..
Posted by: dragvairclark ()
Date: January 30, 2018 12:07PM

Kerry, what's wrong with your existing cam? Lots of wear? If it looks good, re-use it.

Clark Hartzel, Fraser, MI
1965 Monza coupe

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Re: camshaft recommendations..
Posted by: Grandpacorvair ()
Date: January 30, 2018 05:02PM

texas yenko dude Wrote:
-------------------------------------------------------
> I've got a TB-20 in my 64 Spyder. It has a
> 150/180 hybrid turbo and 63 150 heads. It runs
> great.

How did you use 62/62 heads on a 64 engine? I thought it was a bad idea given the longer stroke of the 64?

Kerry Borgne
Birmingham, Michigan

1963 Spyder Convertible

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