Critique my 460 build

Critique my 460 "budget build" por favor! It's intended as a pump gas street motor. Hypothetical vehicle is a stripped down '67 Cougar with C6, 3.89 gears, approximately 3500 rpm stall.

I don't have any of the parts (aside from the carb) so I'm not looking for affirmation. So feel free to critique freely.

- 0.060" over block. Any block
- Factory stock stroke crank.
- 472.6 cubic inches
- Eagle SIR rods
- Speed Pro forged pistons with 22 cc dish
- 10.27:1 compression ratio with zero deck and .040" thick head gasket. That's what I calculate anyway.
- Howards Cams solid flat tappet cam 242371.
- 286/296 degrees adv. 250/256 degrees @ 0.050". 110 LSA. .588/.605" lift
- Ford SCJ heads bought assembled. The "A" version? for flat tappet cams. Run out of the box.
- Edelbrock Torker II manifold. Run out of the box with a 1" open spacer.
- 2" primary headers for a '67-'70 Mustang/Cougar Chassis. Crites?
- Holley 850 double pumper with Proform main body
- rocker arms???

I know I left out a lot of details, but it is still hypothetical.

I think it'd make peak power around 5900-6000 rpm and shift around 6300-6400 rpm.

570 hp?

Are new SCJ heads really 72CC?

Thoughts? Comments? Derision???

paulie

72cc yes.....like any other cyl head it could be +/- 1cc .

Lem Evans wrote:72cc yes.....like any other cyl head it could be +/- 1cc .

Thanks for the info. My Edelbrock FE heads are supposed to be 72cc. They are actually 79 cc. The machine shop told me that. I checked them myself and they are indeed 79 cc. That's why I ask.

How about the build? Stud or Dud?

paulie

i think you are hitting right in there for a bang for the buck build.....the flat tappet packages sometimes don't get enough respect but sqeeze alot of $s out of the build . The flow curve of the SCJ plays right to a typical flat tappet lift....they'll peak at or before .600" lift .

Lem Evans wrote:i think you are hitting right in there for a bang for the buck build.....the flat tappet packages sometimes don't get enough respect but sqeeze alot of $s out of the build . The flow curve of the SCJ plays right to a typical flat tappet lift....they'll peak at or before .600" lift .

Thanks Lem! Bang for the buck is what I was going for. I'd like about 1/2 point higher compression, but I didn't see cheap off the shelf forged pistons to get me there.

Do you think my hp guess and rpm for power peak are close?

Thanks,

paulie

Mill the heads if you need more comp...but you may be thinking about it too much .
3100 rpm stall ......you may want a 109* or 108* cam....off the rack units aint always that correct

Lem Evans wrote:Mill the heads if you need more comp...but you may be thinking about it too much .
3100 rpm stall ......you may want a 109* or 108* cam....off the rack units aint always that correct

Thank you very much!

paulie

[quote="plovett"]Critique my 460 "budget build" por favor! It's intended as a pump gas street motor. Hypothetical vehicle is a stripped down '67 Cougar with C6, 3.89 gears, approximately 3500 rpm stall.

I don't have any of the parts (aside from the carb) so I'm not looking for affirmation. So feel free to critique freely.

- 0.060" over block. Any block , < FINE
- Factory stock stroke crank. ,< OK WHY IF YOU CAN BUY RODS,GO 4.150
- 472.6 cubic inches
- Eagle SIR rods < OK
- Speed Pro forged pistons with 22 cc dish < NOPE FLAT IF POSSABLE, 10.5 OR 7 TO 1
- 10.27:1 compression ratio with zero deck and .040" thick head gasket. That's what I calculate anyway.< NOT ENOUGHT
- Howards Cams solid flat tappet cam 242371. < NOPE, ,ROLLER
- 286/296 degrees adv. 250/256 degrees @ 0.050". 110 LSA. .588/.605" lift < SMALL ,UNLESS A ROLLER
- Ford SCJ heads bought assembled. The "A" version? for flat tappet cams. Run out of the box. < WOULDNT OUT OF THE BOX
- Edelbrock Torker II manifold. Run out of the box with a 1" open spacer. < NO
- 2" primary headers for a '67-'70 Mustang/Cougar Chassis. Crites? < 2 3/8'S
- Holley 850 double pumper with Proform main body , < KINDA SMALL
- rocker arms??? <1.73'S

-R

[quote="BOSS 429"]

plovett wrote:Critique my 460 "budget build" por favor! It's intended as a pump gas street motor. Hypothetical vehicle is a stripped down '67 Cougar with C6, 3.89 gears, approximately 3500 rpm stall.

I don't have any of the parts (aside from the carb) so I'm not looking for affirmation. So feel free to critique freely.

- 0.060" over block. Any block , < FINE
- Factory stock stroke crank. ,< OK WHY IF YOU CAN BUY RODS,GO 4.150
Because the rods would cost more and the crank would cost more. Also harder to hook up on the street.

- 472.6 cubic inches
- Eagle SIR rods < OK
- Speed Pro forged pistons with 22 cc dish < NOPE FLAT IF POSSABLE, 10.5 OR 7 TO 1
I think flat tops would put me around 12:1 compression.

- 10.27:1 compression ratio with zero deck and .040" thick head gasket. That's what I calculate anyway.< NOT ENOUGHT
- Howards Cams solid flat tappet cam 242371. < NOPE, ,ROLLER
Roller not in the "budget build" plus I think street longevity better with flat tappet.

- 286/296 degrees adv. 250/256 degrees @ 0.050". 110 LSA. .588/.605" lift < SMALL ,UNLESS A ROLLER
What rpm range do you think the above cam would run in a 466-472 cid motor? What solid flat tappet cam would you go with?

- Ford SCJ heads bought assembled. The "A" version? for flat tappet cams. Run out of the box. < WOULDNT OUT OF THE BOX
Out of the box for budget reasons. And these heads bought assemled are real cheap right now.

- Edelbrock Torker II manifold. Run out of the box with a 1" open spacer. < NO
Torker II is for hood clearance reasons. What would you run?

- 2" primary headers for a '67-'70 Mustang/Cougar Chassis. Crites? < 2 3/8'S
You'd run 2-3/8" headers on a ~570 hp motor turning 6500 rpm or less?

- Holley 850 double pumper with Proform main body , < KINDA SMALL
Agreed. But it's for the Torker II intake.

- rocker arms??? <1.73'S
I was thinking stock ratio too. I was wondering what brand.

-R

Budget-Pump gas-Street machine is what I hear . A flat tappet cam and the 2" headers will be fine.....It'll make a Street Hemi , 428 SCJ or LS6 454 look like a p.o.s.

Yup. I don't doubt that it'd be easy to find another 100+ hp over what I listed; with a Victor intake, ported SCJ's, more compression, and a solid roller, etc. But as you surmised, that's not what I was looking for.

Thanks for the responses.

paulie

Would one of these cams be better than the Howards 250/256 cam I originally mentioned?

Lunati 416A3LUN, 276/286 degrees advertised, 247/256 degrees @ 0.050", .612/.619" net lift, 106 LSA.

Lunati 416A4LUN 285/292 degrees advertised, 252/259 degrees @ 0.050", .611/.612" net lift, 108 LSA.

paulie

Do you have a need for vacuum ? Power brakes ?

Lem Evans wrote:Do you have a need for vacuum ? Power brakes ?

No need for vacuum. I have a manual disc/drum combo in my Cougar.

paulie

I lean toward the 108* lsa . The duration may be something you and the convertor guys could talk about .