B2 Motorsports - Jeff Lipton 487 FE Build

[blykins]

Well it's been a sinister build for sure....hahaha

Torque would never be as high as the horsepower on a build like this, and I've never seen a 480-500 inch FE have over 600-620 lb-ft of torque on a normal hydraulic roller build.

We use a Stuska dyno, which shows anywhere from 25-50 hp lower than the DTS and Superflow stuff, so I told Jeff I was going to stay conservative on my guess.

[ERA Chas]

Originally Posted by blykins

Well it's been a sinister build for sure....hahaha

Torque would never be as high as the horsepower on a build like this, and I've never seen a 480-500 inch FE have over 600-620 lb-ft of torque on a normal hydraulic roller build.

We use a Stuska dyno, which shows anywhere from 25-50 hp lower than the DTS and Superflow stuff, so I told Jeff I was going to stay conservative on my guess.

Good to see you.

[lippy]

As you might imagine, I'm really excited to get this beast. I'm curious to see what it puts out but my guess is 650-670 HP and 625 lb-ft.

[patrickt]

Originally Posted by lippy

As you might imagine, I'm really excited to get this beast. I'm curious to see what it puts out but my guess is 650-670 HP and 625 lb-ft.

Remember, to get a true indication of the performance of the engine, you should insist that the engine be dyno'd with sidepipes attached and, preferably, with the water pump pumping. Otherwise, you're just fooling yourself.

[blykins]

Not feasible with a lot of setups. Cobra headers and side pipes just don't fit on every dyno.

Also, with 600-650 hp, the 5-8 hp that a water pump absorbs really isnt a concern. ;-)

He's more than welcome to put it on a chassis dyno, but trying to reproduce the conditions that it will be under in the car isn't easy or do-able in most cases.

[patrickt]

Originally Posted by blykins

Not feasible with a lot of setups. Cobra headers and side pipes just don't fit on every dyno.

We've had this thread topic many times before. It is without question more accurate to bench dyno an engine destined for a Cobra with the primaries and side pipes on. Many of us had it done (me, for instance). But, I'll let the matter drop. I'm sure Chas will chime in though on him with something snappy like "Pat's just trying to stir the pot, but he is right, and you'll just be fooling yourself if you rely on open pipe numbers. But, of course, we lie best when we lie to ourselves...."

[lippy]

Originally Posted by patrickt

We've had this thread topic many times before. It is without question more accurate to bench dyno an engine destined for a Cobra with the primaries and side pipes on. Many of us had it done (me, for instance). But, I'll let the matter drop. I'm sure Chas will chime in though on him with something snappy like "Pat's just trying to stir the pot, but he is right, and you'll just be fooling yourself if you rely on open pipe numbers. But, of course, we lie best when we lie to ourselves...."

Sure, it's more of an indication of real world performance if headers and sidepipes are on. But the actual peak dyno numbers aren't that important to me. We chose the parts we did, and Brent did a very careful job optimizing the build by porting, adjusting the carb, matching the intake, etc. So really the build is what it is at this point. A big peak number is nice, but we do the dyno run for other reasons too, like verifying the integrity of the parts and the assembly, checking for leaks, and optimizing the tune.

[lippy]

Originally Posted by blykins

Torque would never be as high as the horsepower on a build like this, and I've never seen a 480-500 inch FE have over 600-620 lb-ft of torque on a normal hydraulic roller build.

We use a Stuska dyno, which shows anywhere from 25-50 hp lower than the DTS and Superflow stuff, so I told Jeff I was going to stay conservative on my guess.

But this is a solid roller build

[blykins]

True, but when you add more cam to raise the hp and the hp peak, torque will usually go down and the torque peak will usually go up.