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 Post subject: cam selection?
PostPosted: Thu Dec 18, 2014 8:19 pm 
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TBI Slant 6

Joined: Tue Nov 25, 2014 9:14 pm
Posts: 127
Location: Alberta, Canada
Car Model: 62 Valiant
im looking for a good cam choice for a mild street turbo build, im thinking 2.2 turbo pistons, stock valve size, 225 based, ported head, <10 pounds of boost im hoping for 250-300 hp and a nice idle, easy to start, power in the 1000-4000 rpm range

i hear comp cams will kill distributor gears, is that true? is there a cure?

thanks


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 Post subject:
PostPosted: Thu Dec 18, 2014 9:47 pm 
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Turbo Slant 6
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Joined: Sat Sep 13, 2014 8:25 am
Posts: 789
Location: Springtucky OR
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I'd like to know what the more experienced builders think of the Howard 751082-12 Cam for a similar application.
Here's a link --> http://www.summitracing.com/parts/hrs-751082-12/overview/
And specs:

Cam Style: Mechanical flat tappet

Basic Operating RPM Range: 1,200-5,000

Intake Duration at 050 inch Lift: 214

Exhaust Duration at 050 inch Lift: 214

Advertised Intake Duration: 250

Advertised Exhaust Duration: 250

Intake Valve Lift with Factory Rocker Arm Ratio: 0.450 in.

Exhaust Valve Lift with Factory Rocker Arm Ratio: 0.450 in.

Lobe Separation (degrees): 112

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 Post subject:
PostPosted: Fri Dec 19, 2014 3:55 am 
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EFI Slant 6
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Location: Terre Haute IN
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http://slantsix.org/forum/viewtopic.php?t=51607

See if this helps, there's 1 or 2 posts on cams

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 Post subject:
PostPosted: Fri Dec 19, 2014 4:10 am 
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Joined: Mon Oct 21, 2002 11:08 am
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Location: Blacksburg, VA
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That Howard's cam looks darn near perfect to me, for a 225 turbo.

I am running a 20 yr old Mopar Perf 0.436" cam and have made as much as 330-340 crank HP on 9.5 psi.

Lou

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 Post subject:
PostPosted: Fri Dec 19, 2014 3:34 pm 
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TBI Slant 6

Joined: Tue Nov 25, 2014 9:14 pm
Posts: 127
Location: Alberta, Canada
Car Model: 62 Valiant
i had a read of the cam links posted, it seems the stock cam is pretty good as is, how would that howards cam compare? what about the stock cam with 1.6 roller rockers?

is a new stock cam set avalible?

thanks guys


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 Post subject:
PostPosted: Fri Dec 19, 2014 4:35 pm 
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TBI Slant 6
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Joined: Wed Apr 03, 2013 4:04 pm
Posts: 206
Location: Warsaw, MO
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Where would you find 1.6 roller rockers? If you did, I'd hate to know what they cost... :shock:

My 2 cents: If you find 1.6 rollers, I'd spend my money elsewhere. They would cost you an arm and a leg, which is money you could put towards a good head.

I've also heard a stock cam is 'good enough' but my opinion, if you're going to buy a new cam, why go with a stock one that's 'good enough'?

Good Luck!


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 Post subject:
PostPosted: Fri Dec 19, 2014 5:34 pm 
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Turbo Slant 6
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Location: Springtucky OR
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Dart270 wrote:
That Howard's cam looks darn near perfect to me, for a 225 turbo.
I suppose in a perfect world it might have a couple degrees more lobe separation. I don't have a good handle on how much difference that would actually make. It does seem like a good option since it is a readily available off the shelf part.

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 Post subject:
PostPosted: Fri Dec 19, 2014 8:09 pm 
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TBI Slant 6

Joined: Tue Nov 25, 2014 9:14 pm
Posts: 127
Location: Alberta, Canada
Car Model: 62 Valiant
dartsport76 wrote:
Where would you find 1.6 roller rockers? If you did, I'd hate to know what they cost... :shock:

My 2 cents: If you find 1.6 rollers, I'd spend my money elsewhere. They would cost you an arm and a leg, which is money you could put towards a good head.

I've also heard a stock cam is 'good enough' but my opinion, if you're going to buy a new cam, why go with a stock one that's 'good enough'?

Good Luck!


http://www.pentastarparts.com.au/store/ ... tail&p=811
more than half what i paid for the car

what option would be better than stock that wont wreck my distributor, still idle smooth and give me more power or better gas milage? is that howard the improvement i need?

i have the later style head and will be porting it, valve job, polishing the chamber, etc, and its not like i have the option of a performance head


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