cam question

Go down

cam question

Post  mitch on February 2nd 2014, 11:42 am

I've been getting some parts together for a pulling truck engine, It will be a stock stroke, bored .06, single plane intake, headers, big 4150 carb. I got a good deal on a set of big valve, ported D0VE heads and comp roller cam form a forum member. Will this cam work ok for me? I think it was intended for a 4.3 stroke build.

cam specs intake exhaust
gross valve lift .787 .726
duration @.02 tappet lift 303 323
duration @ .05 273 288
lobe lift .455 .420

mitch

Posts : 116
Join date : 2010-04-01

View user profile

Back to top Go down

Re: cam question

Post  dfree383 on February 2nd 2014, 11:49 am

What's the rest of the build? How much compression? Head flow? What trans? Convertor? Gearing?
avatar
dfree383
BBF CONTRIBUTOR
BBF CONTRIBUTOR

Posts : 13967
Join date : 2009-07-09
Location : Home Wif Da Wife.....

View user profile

Back to top Go down

Re: cam question

Post  mitch on February 2nd 2014, 1:55 pm

It's a pulling truck so converter and gearing aren't applicable. It will need to run a lot of RPM though, at least 7500. The only info I got for head flow is 340 @ .8 lift. I don't know what the compression ratio will be. it can run race gas so maybe about 14:1 it will depend on what I get for pistons.

mitch

Posts : 116
Join date : 2010-04-01

View user profile

Back to top Go down

Re: cam question

Post  DanH on February 2nd 2014, 2:41 pm

mitch wrote:It's a pulling truck so converter and gearing aren't applicable. It will need to run a lot of RPM though, at least 7500. The only info I got for head flow is 340 @ .8 lift. I don't know what the compression ratio will be. it can run race gas so maybe about 14:1 it will depend on what I get for pistons.
with a set of 3.00 gears,  that cam won't work, unless you have a very- very high % of tq/conv. slip

DanH

Posts : 1079
Join date : 2009-08-06

View user profile

Back to top Go down

Re: cam question

Post  mitch on February 2nd 2014, 5:42 pm

DanH wrote:with a set of 3.00 gears,  that cam won't work, unless you have a very- very high % of tq/conv. slip
 why do you think I have 3.00 gears confused
The gearing will be more like 27.00:1
just want to know how it will run with that cam.

mitch

Posts : 116
Join date : 2010-04-01

View user profile

Back to top Go down

Re: cam question

Post  IDT-572 on February 2nd 2014, 6:51 pm

That cam will work, but your going to have to keep the rpm up because it will drop below the power curve fairly quickly.
There will be less than 1000 rpm between torque peak and hp peak more like 7 to 800.

With some intake work you could get that spread wider and pick up some hp also.

If you haven't bought one yet a mafia intake would help with that cam.
avatar
IDT-572
BBF CONTRIBUTOR
BBF CONTRIBUTOR

Posts : 4581
Join date : 2008-12-02
Age : 57
Location : Shelbyville Tn.

View user profile

Back to top Go down

Re: cam question

Post  mitch on February 2nd 2014, 7:16 pm

thanks i was leaning towards the mafia intake
about what rpm would it peak?

mitch

Posts : 116
Join date : 2010-04-01

View user profile

Back to top Go down

Re: cam question

Post  Barney on February 2nd 2014, 7:26 pm

IDT-572 wrote:That cam will work, but your going to have to keep the rpm up because it will drop below the power curve fairly quickly.
There will be less than 1000 rpm between torque peak and hp peak more like 7 to 800.

With some intake work you could get that spread wider and pick up some hp also.

If you haven't bought one yet a mafia intake would help with that cam.  
^^^ sage advice.
avatar
Barney

Posts : 2577
Join date : 2009-12-02
Age : 42
Location : Kirkland, Il

View user profile http://www.hdraracingseries.com

Back to top Go down

Re: cam question

Post  Bret Powell on February 2nd 2014, 7:45 pm

What is the lobe separation? Sounds like the cam will do what you're asking, peak torque may be around 6200 give or take and might horse peak around 67-6900 depending on if the heads are good and lobe separation. If the lobe sep is 112 or so it will hold on better. If it is around 108 it will probably never see 7500.

Bret

Bret Powell

Posts : 133
Join date : 2009-08-30

View user profile

Back to top Go down

Re: cam question

Post  mitch on February 2nd 2014, 7:54 pm

lobe sep is 110

mitch

Posts : 116
Join date : 2010-04-01

View user profile

Back to top Go down

Re: cam question

Post  Bret Powell on February 2nd 2014, 8:16 pm

That's better than a 108.

Bret Powell

Posts : 133
Join date : 2009-08-30

View user profile

Back to top Go down

Back to top


 
Permissions in this forum:
You cannot reply to topics in this forum