B2 Motorsports - Jeff Lipton 487 FE Build

[patrickt]

Originally Posted by lippy

The HP numbers look good to me also. I'll bet we get to 650+. And on a conservative dyno with accessories.

Lemmee tell you... you will never, ever, ever, ever use that kind of horsepower on the street in a Cobra. Whatever tires you have on there, when you stick the throttle, so that you don't break the tires loose much, but accelerate as fast as your total package allows, you can not do that safely for much time at all on the street. In fact, when you switch out the spring on your secondaries (which you mentioned you need to do in a previous post) you will be absolutely amazed at how difficult it is to safely open your secondaries fully on the street.

[lippy]

Originally Posted by patrickt

Lemmee tell you... you will never, ever, ever, ever use that kind of horsepower on the street in a Cobra. Whatever tires you have on there, when you stick the throttle, so that you don't break the tires loose much, but accelerate as fast as your total package allows, you can not do that safely for much time at all on the street. In fact, when you switch out the spring on your secondaries (which you mentioned you need to do in a previous post) you will be absolutely amazed at how difficult it is to safely open your secondaries fully on the street.

You're probably right. I think I'm going to start off with a throttle stop installed. But it's fun to build.

[blykins]

We may have lost 10 hp turning the water pump and alternator. Negligible.

One of the rocker stud inserts came out of the head. I'm cutting the heads and swapping the street T&D rockers for the race set. Not going to let this happen again.

Not a vacuum secondary carb.

Don't need a throttle stop, just don't push the pedal down all the way. Half throttle to 3/4 throttle is still going to get you more than 500 hp, way more than enough to kill you.....

[blykins]

The fork has been stuck in this one....it's done and is ready to go home to its new owner.

Dyno'd yesterday, 638 hp @ 6600, 567 lb-ft of torque.

Here's some 7000 rpm music for y'all.

B138C321-853C-4551-94FA-70A8DD2530AE-4087-00000226DDBB82BB_zpsbdebab2b.mp4 Video by shellvalleyowner | Photobucket