Rate my new dyno sheet!

tritoncobra · #1 (**permalink**) 11-14-2003, 05:58 PM

This is a 351W (not stroked) built by Eric at Performance Engineering in Ross, Ohio (http://www.perfeng.cc). .544 lift cam, runs on pump gas (93 preferably).

The results? 485 HP, 445 lb-ft! Is that insane for a non-stroked 351W or what??

Edley Rondinone · #2 (**permalink**) 11-14-2003, 06:03 PM

I'm Jealous!!! Hope you have a lot of fun with that mill!!

tritoncobra · #3 (**permalink**) 11-14-2003, 09:53 PM

Thanks Edley, let's just see how much of that power I can actually put to the ground..

CSX 4027 · #4 (**permalink**) 11-14-2003, 10:23 PM

I would like to see the data sheet. From what I can see there is a real problem. According to my understanding, Horsepower and Torque are suppossed to be equal at 5250 RPM's no matter what. I would ask your builder why yours is at less....

tritoncobra · #5 (**permalink**) 11-14-2003, 10:55 PM

Steve, nice observation. I did some research and found out that since the torque and hp are being graphed on different scales their point of intersection is arbitrary.

You had me worried though *whew*.

CSX 4027 · #6 (**permalink**) 11-14-2003, 10:57 PM

No Comprendo!!!
Splain Lucy?

Do you have the data sheet or just the graph?

tritoncobra · #7 (**permalink**) 11-14-2003, 11:20 PM

Steve,

I do, but it's on another computer.

Here's the pertinent data:

5200 RPM HP = 438.8 TORQUE = 443.7 (Torque is Higher)
5300 RPM HP = 445.9 TORQUE = 442.2 (HP is Higher)

Thus the two intersect somewhere in between - you guessed it, at 5250 RPM.

The reason the above dyno does not show the intersection at 5250 is a result of different scales being used for torque and HP - the two vertical axis do not represent the same number scales. Due to that difference the HP and torque curves can't be compared on a visual basis. As to why one wouldn't always use the same scale, I couldn't say.

Jim Werth · #8 (**permalink**) 11-15-2003, 02:25 PM

What heads? What cam? We want engine specs!

tritoncobra · #9 (**permalink**) 11-15-2003, 03:00 PM

http://www.perfeng.cc/engines.html

That is the link to all of Eric's engines. This is a 351 with .544 cams - but notice it get's as much HP as the 418 stroker! (Although not nearly as much torque). It's possible the high HP numbers are a result of something Eric did to the engine to allow it to rev a bit higher than normal. I'll have to ask.

-Adam