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351 clevo cam 

 

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 Post subject: 351 clevo cam
Posted: Fri Nov 05, 2004 8:12 pm 
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howdy all , good to be back
i got a 351 clev , xd , 6 inch rods , 9.5 comp , 4v in 2v , single plain inlet , 4 - 1 headers into a 3 inch , adjust rockers , 3500 stall , 3.6 rear , iom aftyer a solid or roller cam to suit , i rearly drive on road so smooth idle and low down grunt is not an option , most solid or roller cams are for high comp engines and im havin trouble findin one ,
any help would be great - see you at the nats fellas
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richard - pinkbits
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Posted: Fri Nov 05, 2004 8:17 pm 
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have you tryed websites like Crowcams and Heatseaker, or you can do 1 of 2 things

1: use guestamation technics
2: buy the biggest cam u cam find

 

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 Post subject: cam
Posted: Fri Nov 05, 2004 8:24 pm 
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i havnt tried heetseeker but many others ,ill try them
thanx
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Posted: Fri Nov 05, 2004 9:18 pm 
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Are your heads open or closed chamber 2vs?

Also it doesnt matter if its hyd/solid or roller,
As they get bigger, the overlap increases which is why your comp needs to be higher otherwise you will have an engine that wont perform from low comp.

And the reason its hard to find one your after is because with your combo there is plenty of hyd cams that give you what your after.
As the solid and roller cams are designed for racing and as such even there smallest 1 is equal to lets say a stage 4 hyd cam.

With comp ratio, a 351 with open chamer heads is around 9.0:1, if speed pro flat top pistons are used it lifts comp to 10.0:1. And then if U want more you can fit closed chamber heads and will give a comp ratio of around 12.0:1. That might sound high but remember the only reason your bumping the comp up so much is because the cam your going to use is going to have large valve overlap which will reduce the comp.
My friends xd runs this setup and runs fine on mobil premium fuel.
Try crane cams they are quiet good.

 

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Posted: Sat Nov 06, 2004 4:07 pm 
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can you explain overlap a bit more if posible !
ive got 4v in 2v open , pistons for a 6 inch rod but ive machined a bit from top to give me 9.5 comp ( which i wish i never did )
id still prefer solid over4 hyd for the more positive force , ive had hyd lifters fail and stick in past and i hardly drive car
thanks for the reply , ill check out crane
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 Post subject: Re: 351 clevo cam
Posted: Sat Nov 06, 2004 6:30 pm 
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pinkbits8u wrote:
howdy all , good to be back
i got a 351 clev , xd , 6 inch rods , 9.5 comp , 4v in 2v , single plain inlet , 4 - 1 headers into a 3 inch , adjust rockers , 3500 stall , 3.6 rear , iom aftyer a solid or roller cam to suit , i rearly drive on road so smooth idle and low down grunt is not an option , most solid or roller cams are for high comp engines and im havin trouble findin one ,
any help would be great - see you at the nats fellas
+ ladies


richard - pinkbits

Do you want a big a** cam for a clevo?
I've got one that I was about to advertise next week. Its a johnson racing cams custom, solid flat tappet (lifters included)
IN opens @ 27 btdc ,closes @ 60 atdc
EX opens @64 bbdc, closes @25 atdc all mesurements are @ .050''
lift at cam .365 IN (.631'' at valve with 1.73 rockers)
EX .370'' @ cam (640 @ valve '' '' '')
I only used it for 2-3 months as I upgraded to a roller
this cam is not for the faint hearted
capable of up to 550hp+ . I could get it to idle at 1200rpm with 4V heads
power range 3400-7500rpm
P.M me if interested I'm not asking for much :wink:

 

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Posted: Sat Nov 06, 2004 7:03 pm 
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pinkbits8u wrote:
can you explain overlap a bit more if posible !
ive got 4v in 2v open , pistons for a 6 inch rod but ive machined a bit from top to give me 9.5 comp ( which i wish i never did )
id still prefer solid over4 hyd for the more positive force , ive had hyd lifters fail and stick in past and i hardly drive car
thanks for the reply , ill check out crane

to lift you're comp ratio simply have a good machine shop (Teterins) grind .040'' off the face of you're 2V's this will bring it up to aprox 10-10.7:1 depending on cc's in combustion chamber, I would assume you are running zero deck height on a motor of these specs??

 

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Posted: Sun Nov 07, 2004 5:28 pm 
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as it is a mild engine you wouldn't want to go too big in the cam say 240 @ 050
also the 6" rods will give you high cyl pressures , be careful of that.
Do you have the finances to go roller ? a complete roller setup will be 2k plus.

as you have low comp yyou don't want too much overlap other wise it really will be a dog down low.

there will be a few cranes say F242 that i have used that will be more than enough.
the wrong cam choice here will make or break your engine.

 

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Posted: Sun Nov 07, 2004 7:07 pm 
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im happy with the 9.5 ( ill go more next time)
im just trying to get the most out of the donk ive got - its pretty new so i dont realy want to change heads or short block , just the inlet , exhaust and cam

ill check out the crane you mentioned
i didnt think roller set upo was that much , nut you get what you pay for , ill stick with solid

cheers fellas

i get jack jones to do my machining , he s been good over the years
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Posted: Sun Nov 07, 2004 7:08 pm 
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to go roller on top of cam price u will need
roller lifters approx$700
roller springs $300
dizzy gear$100

 

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Posted: Sun Nov 07, 2004 8:01 pm 
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expensive for me , actually very expensive

i started builind car and got it finished halfway through the cooks pregnancy and now lookin for house , no chance at all of the roller set up
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Posted: Fri Nov 12, 2004 6:46 pm 
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Hi its kenny here again
try Johnson Racing Cams on 02 97906129
they will custom grind anything you want for $160 Hyd or solid
and they duplicate other popular brands
they also know what clevo's work best with

 

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Posted: Fri Nov 12, 2004 9:26 pm 
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thanks Kenny
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Posted: Sat Nov 13, 2004 1:00 pm 
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I was just looking at a few spec cards off clevo customs
and found a cam with 225deg @.050 in & ex with .596'' & .618'' lift
& it only requires 9.0-10.5 comp
this was good for 450hp depending on mods
& you only have to rev it to 6000rpm with a fair idle! :lol:

 

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Posted: Sun Nov 14, 2004 3:40 pm 
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i saw the bloke that put the heads 2getha and hes getn bac 2 me about max v/v lift the springs will take b4 binding ,
that cam your on about sounds allright , its got big lift for such small revs
and comp
ill let you know what my machinist says in a few days
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