Let's play guess the hp & Trq

Kick's and giggles let's play guess the hp for this engine combo.

521cu
Ported scj cylinder heads
Ported Victor 4500 intake
10:1 compression ratio
1050 4700 Quick fuel carb from Phillip
Edelbrock water pump
Crower SS rocker arms
Ford racing  M-6250-521 solid roller camshaft
I hope to have the engine dyno'd before I bring it home from KY!

..

730-750hp 650tq

254*/258*

Lem Evans wrote:254*/258*

Thanks Lem,,, your the best!!!

No one else care to take a guess?

660

dfree383 wrote:660

/\ prob close, hope it make more tho,should 533 ci

Jones, that thing is a 521"....not 533".

Lem Evans wrote:Jones, that thing is a 521"....not 533".

This engine is based on the old Ford Motorsports 521 crate engine except for the better flowing heads and intake. If I'm not mistake the crate engine was rated some where around 650hp.

Ford rated the 10:1 CR 521 at 580 hp.

The camshaft is quite mild I would guess 630 or 640 HP with better flowing heads (probably won't see any gains with a ported Victor intake
on a 6000 rpm max engine).

Sounds like you already know what it will make?

68galaxie wrote:Ford rated the 10:1 CR 521 at 580 hp.

The camshaft is quite mild I would guess 630 or 640 HP with better flowing heads (probably won't see any gains with a ported Victor intake
on a 6000 rpm max engine).

Sounds like you already know what it will make?

I didn't know that, I guess I didn't do much research. The hope is that the 521 camshaft will be mild enough not to cause the valve train to eat it's self.

514 CUBIC INCH – 625 HP
FORD RACING PERFORMANCE CRATE ENGINE ASSEMBLY
M-6007-D514RT* Rear Sump T-pan
• 625 HP @ 6250 RPM
• 600 ft./lbs. of torque @ 4800 RPM
• 9.8:1 compression ratio (nominal)
• Forged aluminum dished pistons M-6108-C514, H-beam connecting
rods M-6200-C514, Mechanical roller camshaft M-6250-A514
• High-performance rear T-sump oil pan, fits most “Fox”-body cars
• MSD billet distributor
• Cast nodular iron, M-6303-A514
• M-6049-SCJB “Super Cobra Jet” aluminum cylinder heads
• M-9424-H429 “Victor Jr.” single plane intake manifold (requires
Dominator carburator


copy/paste from 2006 frpp catalog

Frrom a more up to date catalog  


https://www.fordracingparts.com/parts/part_details.asp?PartKeyField=10356

521 CUBIC INCHES 580 HP CRATE ENGINE REAR SUMP


tech notes
HP (SAE J607) 609 hp @ 5750 rpm
Torque (SAE J607) 630 lb-ft of torque @ 4500 rpm
HP (SAE 1349 Corrected) 580 hp @ 5750 rpm
Torque (SAE 1349 Corrected) 600 lb-ft of torque @ 4500 rpm
10.0:1 compression ratio (nominal)
Forged aluminum dished pistons
Forged steel H-beam connecting rods, M-6200-C514
Billet steel mechanical roller camshaft , M-6250-A514 (mechanical roller camshafts not recommended for street use; contact Techline for more details)
High-performance rear sump oil pan, fits most passenger cars that came equipped with rear sump pans
MSD Distributor with M-12390-H Bronze Gear
Cast nodular iron crankshaft, M-6303-A514
New heavy-duty 4-bolt main siamese bore race block M-6010-A460
Super Cobra Jet aluminum cylinder heads M-6049-SCJB
Victor single plane intake manifold M-9424-H429 (requires Dominator carb)

Look at what you get:

A 521 cubic inch engine assembly that includes the items listed above and a multi-index timing chain set, push rods, roller rocker arms, heavy duty HV oil pump, pickup tube, high-performance oil pan, Ford Racing valve covers, aluminum front cover and water pump, high-performance damper, flywheel, spark plugs, related long block engine parts and NEW M-6010-A460 4-bolt main block
Ford Racing Super Cobra Jet aluminum cylinder heads. They flow significantly more than production 460 heads. Combustion chamber volume is 72cc (nominal)
Ford Racing Super Cobra Jet valve train includes dual-valve springs, retainers, keepers, seals and premium stainless steel swirl polished valves. Intake valve diameter is 2.20" and exhaust valve diameter is 1.76"
Ford Racing high-performance solid roller mechanical camshaft M-6250-A514 provides significant horsepower increases above 3500 RPM and good low-end torque. Valve lift is .640" intake and exhaust. Duration at .050" is 254 degrees intake and 258 degrees exhaust
Ford Racing forged aluminum dished pistons, bore size 4.390"

J607 is the formula that is relative to this post. I'm not aware of who uses the 1349 besides maybe the o.e.m.s. production engines.

OK different standards show different HP, but some are throwing out fantasy HP numbers for a 10:1 521 and a very small solid roller cam.
750hp? really? 650 hp would not be a piece of cake with the OP parts list.

68galaxie wrote:OK different standards show different HP, but some are throwing out fantasy HP numbers for a 10:1 521 and a very small solid roller cam.
750hp? really? 650 hp would not be a piece of cake with the OP parts list.

It's not like I have had a million responses to this thread! The motor can always have another camshaft made for it.

jones wrote:

68galaxie wrote:OK different standards show different HP, but some are throwing out fantasy HP numbers for a 10:1 521 and a very small solid roller cam.
750hp? really? 650 hp would not be a piece of cake with the OP parts list.

It's not like I have had a million responses to this thread! The motor can always have another camshaft made for it.

you have what most people call A.D.D. always have to try and do it better knowing you will never be happy....

the Coug wrote:

jones wrote:

68galaxie wrote:OK different standards show different HP, but some are throwing out fantasy HP numbers for a 10:1 521 and a very small solid roller cam.
750hp? really? 650 hp would not be a piece of cake with the OP parts list.

It's not like I have had a million responses to this thread! The motor can always have another camshaft made for it.

you have what most people call A.D.D. always have to try and do it better knowing you will never be happy....

Thats why I didn't want nothing to do with building this engine. I gave the builder an idea of what I wanted to do and let him have free rein! No HP goals was ever said.

Ps of course now that the build is all done but running I'm kinda curious as to how much it might make. The dyno will be strictly for trying on carbs, rough tune, real-in and torque converter selection.

68galaxie wrote:OK different standards show different HP, but some are throwing out fantasy HP numbers for a 10:1 521 and a very small solid roller cam.
750hp? really? 650 hp would not be a piece of cake with the OP parts list.

The typical 521 SCJ crate engine with an xr292 cam swap typically does push 700hp, fact not fantasy.

the Coug wrote:

jones wrote:

68galaxie wrote:OK different standards show different HP, but some are throwing out fantasy HP numbers for a 10:1 521 and a very small solid roller cam.
750hp? really? 650 hp would not be a piece of cake with the OP parts list.

It's not like I have had a million responses to this thread! The motor can always have another camshaft made for it.

you have what most people call A.D.D. always have to try and do it better knowing you will never be happy....

Like Jones just said, this project will be done per the orginal spec. The short block was available because of my own a.d.d. ......an unfinished project for a vintage jetboat deal.

Any way....I do not know why any of us ever dyno any engine....every mofo on the internet already knows what it's gonna make.

dfree383 wrote:

68galaxie wrote:OK different standards show different HP, but some are throwing out fantasy HP numbers for a 10:1 521 and a very small solid roller cam.
750hp? really? 650 hp would not be a piece of cake with the OP parts list.

The typical 521 SCJ crate engine with an xr292 cam swap typically does push 700hp, fact not fantasy.

I don't believe all the internet HP figures being thrown about.

68galaxie wrote:

dfree383 wrote:

68galaxie wrote:OK different standards show different HP, but some are throwing out fantasy HP numbers for a 10:1 521 and a very small solid roller cam.
750hp? really? 650 hp would not be a piece of cake with the OP parts list.

The typical 521 SCJ crate engine with an xr292 cam swap typically does push 700hp, fact not fantasy.

I don't believe all the internet HP figures being thrown about.

The dyno don't lie.

I'm looking at an artical from Super Rod published in July 2002 702hp and 725lb on Westech's dyno. No reason not to believe it. Its on comp cams website too.

Lem Evans wrote: I do not know why any of us ever dyno any engine....every mofo on the internet already knows what it's gonna make.  

I agree either that or go buy a desk top dyno and you can plug in some bs and it will tell you exactly what you have

there is a guy in the next town a buddy and I went to the parts house to get something this guy was telling me he is building a 1000hp 350 chevy and it will be a street car he knows this cuz he tallied up all the parts he was going to use and the advertised hp they all supposedly make when adding to an engine...