PLEASE HELP. NEED ADVISE. Lost a cam lobe!!!!

[lonesomecur]

Guys please give your opinions on the HP this engine will produce. I bought from a guy that had it built at a speed shop several years ago and have not started it yet.

351W bored 40 over early 70's pickup
edlerbrock RPM heads
perfermer RPM Air gap intake
forged pistions from speedpro
lunati voodoo cam set 61002LK
chromoloy rings from speedpro
crane roller rockers 11746-16
msd 8578 distributor
msd blaster 2
msd wires
edlerbrock off road carb

thanks


Only 10 miles on this engine and I lost the cam. Exhaust lobe almost completely flat. And another lifter had clasped. I did the 20 minute break in. What causes this?

Also what's your recommendation for a replacement cam?

My friend says go roller rockers??

 

[ransil]

since we are guessing ( estimating) I'm going with 845hp +/- some number

 

[lonesomecur]

Gee thanks! Youre real helpful. LOL Im estimating 350 HP. The guy I bought it from said 450. Im just looking for input cause Im getting nervous about firing this thing up finally. You never know what you bought until youve heard it actuallly run.

 

[70_Steve]

351W bored 40 over early 70's pickup
edlerbrock RPM heads
perfermer RPM Air gap intake
forged pistions from speedpro
lunati voodoo cam set 61002LK
chromoloy rings from speedpro
crane roller rockers 11746-16
msd 8578 distributor
msd blaster 2
msd wires
edlerbrock off road carb

thanks

I'm not really smart enough to make a HP guess, but I think I'm smart enough to know that there's not enough info provided to make a reasonable estimate.

1. Which heads? The 1.90 or 2.02 intake?
2. What compression ratio from the pistons? Or... What pistons/installed height?
3. I guess I could look at the cam specs, or you could provide.
4. What ratio are those rockers?

And then you get into the whole tuning thing...

Are you looking for flywheel HP or rear wheel HP? We (smarter guys than me!) have ball-parked the drivetrain losses at about 25%. My Bronco dynoed at about 190HP. That would equate to about 250 flywheel HP.

 

[airbur]

estimated HP 351W

It will be nowhere near 450. Much closer to 325 most likely. From your list of parts etc, nothing has been done to increase displacement. So it's a 351w with some good quality parts.

 

[KyleQ]

I've got a somewhat similar motor - builder is old school and has done very similar builds with the same cam and gotten around 450HP.

357W 10.4:1
Trick Flow 185
555/565 lift Comp cam
flat top aluminum pistons
GT 40 intakes
Hooker headers
80mm maf
75mm TB
A9P

Displacement isn't everything about making power - an engine is an air pump and big heads and a big cam make power.

 

[rguest3]

The came and heads will make the biggest difference in power. And displacement.

Don't know anything about the Lunati Voodoo cams. (specs)

450 HP sounds great! But at what RPM??? 5500-6000? When was the last time your Bronco ran 5500-6000 RPMs?

Good flowing Heads with a Cam with less than 220 duration at .050 would make the best all around power (read streetable) for the Bronco. Mustang? Maybe some more duration, but not much.

 

[Ethansdad73]

I would say close to the 450 mark as well again depending on the cam... the RPM as a package cam head manifold yeild 400-420 if i remember right. so maybe a bit more with the 40over?

 

[ugly74]

450 HP sounds great! But at what RPM??? 5500-6000? When was the last time your Bronco ran 5500-6000 RPMs?

Day before yesterday for mine!

That 450 sounds very optimistic. At the flywheel maybe?

 

[chuzie]

Come on now! You have to tell us how much you paid for it!!!

 

[Thunder26]

Sounds healthy i'm gonna say 375 at the fly though.

 

[Break Down Bry]

Gee thanks! Youre real helpful. LOL Im estimating 350 HP. The guy I bought it from said 450. Im just looking for input cause Im getting nervous about firing this thing up finally. You never know what you bought until youve heard it actuallly run.

Since were all "guessing", with those heads being 2.02,that manifold, and your cam (I'm guessing its over a .500 lift) I'd bet a six pack its very close to 425

 

[bmc69]

It will be nowhere near 450. Much closer to 325 most likely. From your list of parts etc, nothing has been done to increase displacement. So it's a 351w with some good quality parts.

Winner. 325-340 HP

A good all-around performing engine with not a bad cam selection for typicl EB use either.

Basic Operating RPM Range: 1,400-5,700 Intake Duration at 050 inch Lift: 219 Exhaust Duration at 050 inch Lift: 227 Duration at 050 inch Lift: 219 int./227 exh. Advertised Intake Duration: 262 Advertised Exhaust Duration: 268 Advertised Duration: 262 int./268 exh. Intake Valve Lift with Factory Rocker Arm Ratio: 0.499 in. Exhaust Valve Lift with Factory Rocker Arm Ratio: 0.522 in. Valve Lift with Factory Rocker Arm Ratio: 0.499 int./0.522 exh. Lobe Separation (degrees): 112

 

[lonesomecur]

Thanks guys! Maybe ill get it on a dyno some day. I just hope it was built well. I paid $3,000 for it.

 

[WheelHorse]

SBF engine kit; For 351W S/B Ford - 400 hp / 412 Lb/Ft of Torque with flat tappet camshaft

POWER PACKAGE TOP-END KIT #2092 400HP/412 LB-FT OF TORQUE INCLUDES:
Part No. Description
7182 Performer RPM Hydraulic Flat Tappet Cam & Lifters
60259 (2) Performer RPM Cylinder Heads, complete
6991 Timing Cover Gasket and Seal Set
7364 Cylinder Head Gasket Set
7581 RPM Air-Gap 351W intake manifold
8584 Intake Manifold Bolt Kit
8553 Cylinder Head Bolt Set
7820 Performer-Link Timing Set

Cyl head flow is everything. CNC heads flowed more and made more power. See review the combos in the link below.

http://www.edelbrock.com/automotive_new/mc/power_package/tek_ford.shtml

 

[Viperwolf1]

I can absolutely guarranty it will produce exactly 0 horsepower at 0 rpm.

 

[Spartan]

estimated HP 351W

I can absolutely guarranty it will produce exactly 0 horsepower at 0 rpm.

Lol
+1, very true

 

[turbotim2]

I bet the horsepower and torque will be equal at 5,250 rpm. It seems like it would given the specs.

 

[KyleQ]

SBF engine kit; For 351W S/B Ford - 400 hp / 412 Lb/Ft of Torque with flat tappet camshaft

POWER PACKAGE TOP-END KIT #2092 400HP/412 LB-FT OF TORQUE INCLUDES:
Part No. Description
7182 Performer RPM Hydraulic Flat Tappet Cam & Lifters
60259 (2) Performer RPM Cylinder Heads, complete
6991 Timing Cover Gasket and Seal Set
7364 Cylinder Head Gasket Set
7581 RPM Air-Gap 351W intake manifold
8584 Intake Manifold Bolt Kit
8553 Cylinder Head Bolt Set
7820 Performer-Link Timing Set

Cyl head flow is everything. CNC heads flowed more and made more power. See review the combos in the link below.

http://www.edelbrock.com/automotive_new/mc/power_package/tek_ford.shtml

Its not impossible to get over 400HP/TQ from a 315W - not adding displacement doesn't mean you cannot make those goals either. My estimated hp and tq numbers are not out of the realm either - I've got a bit bigger of a cam in my engine which would net me some more power.


Those stats should produce around 400HP/TQ - peak torque around the mid 3K range and hp around 5-6K. Are you guys saying you never EVER run a gear to the top of the RPM range when hill climbing or going through mud where the next ear just isn't enough?


All this "its got to be low end torque" bullshit has got to stop - sure its nice, but it isn't the end all be all of four wheeling. Its difficult to build an engine and not make more power everywhere over a stock engine, so no matter what you made an improvement throughout the entire rpm range. (unless you are using a cam so radical it wouldn't idle without a stall, but you wouldn't in a 4x4 anyway)

 

[357Bronco]

I have similiar parts on my non stroked W, and am sure I'm well over 400hp/tq. You don't HAVE to have big cubes to make power. And KyleQ, couldn't agree more about RPM's, everyone here assumes all Broncos crawl, mine runs.;D