is a .680 solid roller to small for a 545 - 460 Ford Forum
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post #1 of 15 (permalink) Old 07-20-2008, 02:11 PM
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is a .680 solid roller to small for a 545

i bought a solid roller cam a few weeks ago..at that time my plans where to just build a 460 ci motor..but after looking at prices it just made since to add free ci for the same price..so i bought a 4.5 eagle crank.(545ci).and h-beam rods..my question is will the cam i got hold it back...680 lift 292 dur...the car will be a street -strip car with 11-1 compression..thanks guys keep up the great info
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post #2 of 15 (permalink) Old 07-20-2008, 02:38 PM
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Is that 292 actual or .050 lift duration? My roller in my 552 is 240+/- @.050. Made almost 600hp and 700lbs tq. Actual is 290+/- degree duration. What heads are you running? Head [email protected] X amount of lift will help decide a lot. If you don't get enough lift to reach the flow capabilities of the heads then it will be the cam that is what is holding you back not the heads. Cam and head flow need to correlate to each other. ie head flow is 400cfm @ .700 lift and you are only getting .650 lift and the heads are now down to 375cfm at that lift. Other way around is not as bad. Cam lifts to .750 and the heads are max flow at .700 you are lifting more than necessary but you aren't shorting the capabilities of the heads.

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post #3 of 15 (permalink) Old 07-20-2008, 02:44 PM
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I just read your head porting post and the DOVE's will probably be maxed out for flow at that lift, so you should be fine, but definately match to the flow sheets to be sure. cstraub has a formula that you could put the hard flow #'s and cam timing #'s in and check to see where you end up with it.
https://www.460ford.com/viewtopic.php...ht=cam+formula

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post #4 of 15 (permalink) Old 07-20-2008, 02:49 PM
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Assuming your duration #'s are @ 0.050", you're running more cam than I will with my pump gas 572. It will definately decrease your max RPM and optimal shift point though. That's good or bad depending on how you look at it . I'll be shifting my 572 @ 6,100 and am actually happy about that.

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post #5 of 15 (permalink) Old 07-20-2008, 04:27 PM
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cam specs are intake 286- ex 290 ---int [email protected] [email protected] lift int .663- ex .680 2500-6800 rpm
post #6 of 15 (permalink) Old 07-20-2008, 07:20 PM
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you'll be fine................very similar to the cam I had in mine

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post #7 of 15 (permalink) Old 07-28-2008, 09:00 PM
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Originally Posted by Fordtek1
you'll be fine................very similar to the cam I had in mine
what valve springs did you use
post #8 of 15 (permalink) Old 07-29-2008, 04:25 AM
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Quote:
Originally Posted by 1967falconman
cam specs are intake 286- ex 290 ---int [email protected] [email protected] lift int .663- ex .680 2500-6800 rpm
i think that cam with ported D0VE heads will probably yield a shift point below 6000RPM
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post #9 of 15 (permalink) Old 07-29-2008, 08:50 AM
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Quote:
Originally Posted by MauriSSSio
Quote:
Originally Posted by 1967falconman
cam specs are intake 286- ex 290 ---int [email protected] [email protected] lift int .663- ex .680 2500-6800 rpm
i think that cam with ported D0VE heads will probably yield a shift point below 6000RPM
I agree

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post #10 of 15 (permalink) Old 07-30-2008, 01:03 AM
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The cam I have in my 545 is within 2 points of yours on duration at .05
lift on mine is .623 in .651 out
it made 747hp at 6000 and 747tq at 4500
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post #11 of 15 (permalink) Old 07-30-2008, 02:05 PM
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Originally Posted by 70cyclone
The cam I have in my 545 is within 2 points of yours on duration at .05
lift on mine is .623 in .651 out
it made 747hp at 6000 and 747tq at 4500
10.7 CR with blue thunder heads and a 1150 dominator
im using my dove ehads on my 460 right now..it looks like i will be able to afford some good heads soon..im looking at the kasses scj and p-51
post #12 of 15 (permalink) Old 07-31-2008, 12:39 AM
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[quote="1967falconman"]
Quote:
Originally Posted by 70cyclone

im using my dove ehads on my 460 right now..it looks like i will be able to afford some good heads soon..im looking at the kasses scj and p-51
You're making one of the classic mistakes that many of us have made in the past. Choose your combonation and stick with it. That 4.5" stroke is going to soak up that cam like you wouldn't believe.

What was your intended rpm range ? You didn't list the lobe sep, what is it ? Your dove heads are a huge limiting factor on your engine, if you go the P-51 route dump that cam and have one built for the combo you'll have.

I'd want a street, strip car to be able to rev out a bit. I'd take a smaller stroke( smaller engine) with a good set of heads over a bigger engine and a restrictive set of heads hands down, but that's just me.

As other's have stated your looking at a shift point under 6,000.

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post #13 of 15 (permalink) Old 07-31-2008, 12:16 PM
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[quote="G-Code"]
Quote:
Originally Posted by 1967falconman
Quote:
Originally Posted by 70cyclone

im using my dove ehads on my 460 right now..it looks like i will be able to afford some good heads soon..im looking at the kasses scj and p-51
You're making one of the classic mistakes that many of us have made in the past. Choose your combonation and stick with it. That 4.5" stroke is going to soak up that cam like you wouldn't believe.

What was your intended rpm range ? You didn't list the lobe sep, what is it ? Your dove heads are a huge limiting factor on your engine, if you go the P-51 route dump that cam and have one built for the combo you'll have.

I'd want a street, strip car to be able to rev out a bit. I'd take a smaller stroke( smaller engine) with a good set of heads over a bigger engine and a restrictive set of heads hands down, but that's just me.

As other's have stated your looking at a shift point under 6,000.

G-Code
lol..funny thing is i was just thinking that same thing last night..for now i will run my 460 with that cam..heads..and have a custom cam for the 545 with p-51 heads..and use the 460 as a back up
post #14 of 15 (permalink) Old 07-31-2008, 02:00 PM
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Now that sounds like a very good plan.

G-Code
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post #15 of 15 (permalink) Old 07-31-2008, 07:08 PM
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Originally Posted by G-Code
Now that sounds like a very good plan.

G-Code
with this cam..intake and carb..and ported dove heads ..it went 11.74 in this car...it did brake a rod...that was with the old owner...i got the car with the same parts...but with a slightly different lower end..it has dish pistons in it..probably around10-1..every thing else is the same..i did remove about 100 pounds of crap, and the front -rear bumpers will be removed also...
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