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Please help sorting out my 451 combo

Sascha

Sascha

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Hello!
At first excuse my english, it´s what I learned at school long ago;)

After my 500 stroker died last year I´m planning on building something new for my Charger.
I would go little smaller because of the short pistons and piston speed. I think the 451 would be enough for my claims. I have no hp or torque goals in numbers, I would like a healthy street engine which revs fast and is fun to drive and to shift. Little maintenance after building would be great, usually I´m short of time.
The following is what I have on hand and for what it will be.

1968 Charger, A833, 8 3/4 with 3,55 gears, 275/60-15 in back.
Mostly street use on german country roads maybe about 1000 miles per year. Has many upgrades on the undercarriage so driving fast and cornering is no problem. Engine should be stable. RPM range to around max. 6500.
1 time a year to the track just for fun.

What I like to have:
-Scat 451 rotating assembly, forged, CR max. 10,5 / 1
will be ckecked and balanced carefully
-external oiling system
-oilcooler with thermostat
-oilpump ( no descision yet which one)
-still no descision on which carb or EFI, maybe at first carb to meet my budget
had a 950 Quickfuel before

What I have:
-1972 400 b block std bore, needs little overbore
it will be fully machined, decked, honed, oil system modified and so on
-a set of TF240 heads ootb---matching springs for camshaft below
-main girdle
-TTI 1 7/8 headers, rest TTI 3" with h-pipe
-fluid damper
-Mopar M1 single plane intake
-Milodon road race oilpan
- aluminium waterpump and housing
-McLeod RXT street twin clutch
-Quicktime bellhousing
-hydraulic clutch system
-driveshaft loops

First question camshaft:
I have the following hydraulic roller cam with CompCam 1,5 roller rockers.
delivermessagepart

Would that be ok for a 451?

Should I go with standard maincaps and ARP studs or better go aftermarket?
In this case billet or aluminium?
Since I have the maingirdle, I would like to use it.

If you need more infos please let me know.

I think more questions will follow;)

Thanks in advance!
 
Your cam choice isn't showing..... Most of the build sounds like good stuff, what was the failure of the 500? At 6500 the stock caps with a girdle should be fine...
 
Hi,
can´t see the picture?
The block had some damage which was overseen and took water through the multilayer steel gaskets. Due to some oilpump damage my bearings were bad as well.
Camspecs now visible?
Here everything seems ok.
If not I will write them manually later.
delivermessagepart
 
I am a believer in selecting cam as one of the final decisions. Comp cams can custom grind a cam to your build and performance goals. My 451's purple grind .590 lift (solid flat) was replaced by Comps. They recommended a slightly less lift and more diration than the Mopar out if the box cam. That mild difference did have noticeable tuning advantages. With a mild pickup in performance. And cost was only about $50 more.

JMO of course.
 
Hallo!
I agree but have this parts on hand.
Maybe will be perfect fit

Cojohnso1 said:
I am a believer in selecting cam as one of the final decisions. Comp cams can custom grind a cam to your build and performance goals. My 451's purple grind .590 lift (solid flat) was replaced by Comps. They recommended a slightly less lift and more diration than the Mopar out if the box cam. That mild difference did have noticeable tuning advantages. With a mild pickup in performance. And cost was only about $50 more.

JMO of course.
Click to expand...
 
I don't think competition components is the same as Comp Cams?
The cam specs look OK, the 233 duration @ 0.050" and 112 LSA should be very driveable.
Not sure why it has such a large split between intake and exhaust duration?
Depending on your fuel, may want to keep compression at 10:1 with that cam. With 10.5:1 compression, may want a cam with around 240 duration @ 0.050, and at 11.0:1, around 250s duration @ 0.050"
 
451Mopar said:
I don't think competition components is the same as Comp Cams?
The cam specs look OK, the 233 duration @ 0.050" and 112 LSA should be very driveable.
Not sure why it has such a large split between intake and exhaust duration?
Depending on your fuel, may want to keep compression at 10:1 with that cam. With 10.5:1 compression, may want a cam with around 240 duration @ 0.050, and at 11.0:1, around 250s duration @ 0.050"
Click to expand...

Sounds like good info to me...
 
All I can say is the 451 that we built back in 2004 now has about 40,000 miles on it and still going strong.My CR was 9.8 with Edelbrock RPM heads and a much milder cam at .490 lift.
Good luck with your build.:thumbsup:
 
Hello!
Thanks for reply.
The builder who did the 500 years ago choose this.
Will check out final CR and choose then.
Even though we have 98 or even 102 octane at nearly every gas station I would like to hold CR at the conservative side .
The 500 had 11,84 with the cam above.


451Mopar said:
I don't think competition components is the same as Comp Cams?
The cam specs look OK, the 233 duration @ 0.050" and 112 LSA should be very driveable.
Not sure why it has such a large split between intake and exhaust duration?
Depending on your fuel, may want to keep compression at 10:1 with that cam. With 10.5:1 compression, may want a cam with around 240 duration @ 0.050, and at 11.0:1, around 250s duration @ 0.050"
Click to expand...
 
Thanks!

At the moment I have standard 383 again.
Little diffrent to my stroker;)

Darter6 said:
All I can say is the 451 that we built back in 2004 now has about 40,000 miles on it and still going strong.My CR was 9.8 with Edelbrock RPM heads and a much milder cam at .490 lift.
Good luck with your build.:thumbsup:
Click to expand...
 
Looks like a Scott Brown cam to me.
 
I cannot see the cam spec but I would advise to " run what you brung" run your existing cam and see how you like it so you better know which way to change
did you post trans and gears, weight and how you want to drive
no way to make a cam suggestion
you could also send all your details to Mike Jones Jones cams go to his website and fill out his cam select card
his inverse radius flank roller cams cannot be beat
 
I can't tell what the seat durations and timing are from the cam card
can you get the duration at .006 and the timing at.006
.050 is more for degreeing the cam as how fast the ramps are - what Harvey crane called "intensity" makes a big difference and can have cams that are quite different with the same .050
throw in the .200 durations and lets see how that thing breathes
lots of discussions on HR here personally I would not spend the money but put it toward some EDM FT lifters and adjustable rockers
if you go roller tip rockers check out the B3 website tech articles- would Iron rockers work fine with that cam ? IDK scott brown
also I'd run the lighter beehive springs and retainers
you need to have any otb head checked
 
Good morning,

thanks for info!

This cam is from my last engine.
We will finish the block and rotating assembly and decide later if to use it or not.
Adjustable CompCam roller rockers are still there as well.
I asked because it is what I have on hand.


wyrmrider said:
I can't tell what the seat durations and timing are from the cam card
can you get the duration at .006 and the timing at.006
.050 is more for degreeing the cam as how fast the ramps are - what Harvey crane called "intensity" makes a big difference and can have cams that are quite different with the same .050
throw in the .200 durations and lets see how that thing breathes
lots of discussions on HR here personally I would not spend the money but put it toward some EDM FT lifters and adjustable rockers
if you go roller tip rockers check out the B3 website tech articles- would Iron rockers work fine with that cam ? IDK scott brown
also I'd run the lighter beehive springs and retainers
you need to have any otb head checked
Click to expand...
 
The cam on the cam card you have already- use it
B3racingengines.com (I think) and read all 3 tech articles
if running roller rockers here is a place to spend your hard earned dollars
I see round d round and buick at Scotts website but only cnc ported heads for mopar so I can't comment on his mopar grinds or is he using his chevy grinds?
making progress
cheers
 
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