CHEF_EG_1

congratulations, I'm happy for him. However, I'm going n/a, carbed, and into a SA/FB shell specifically built for Bonneville, while maintaining street legality.

DriveFast7

iTrader: (1)

http://pineappleracing.com/ProdSvcs.html

While 2-rotor rotary engines are the norm, Pineapple Racing can claim to be one of the few shops to have worked on 1-, 3-, and 4-rotor engines, as well.

-bp-

CHEF_EG_1

Pineapple was who I was originally planning on getting the e-shaft from, but it looks like, if possible, MarvelSpeed is gonna be building my entire motor. THANK GOD FOR HOOKUPS!

rotary emotions

Now I still don't know about 3 or 4 rotor E-shafts prices... :-( Come on, is this really as expensive as the original quote by Chef?

CHEF_EG_1

Pineapple said $1899+shipping (USD)

MarvelSpeed said they would *probably* include it in the engine buildup price.

rx720bt

The racing beat FD Bonneville car is a tube car and makes in excess of 900HP utilizing a 13G/20B engine and I believe tripple turbocharged. The engine sits litterally in the middle of the car. The speed they recorded back in 1995 is 242 MPH.

Using your carbed 4rotor 12a, you may not even come close to the HP figure that racing beat had.

In comparison, to stimulate some though, the 4 rotor R26B in the 787B race car, is fuel injected, tripple spark plugs, with complicated trumphet intake system makes in excess of 700HP. I doubt that your custom 12a 4 rotor utilizing a carb and non supercharge/turbocharge, with an unproven custom shaft design will even come close to those HP figures.

Have you tried computing in paper the weight of your car, wind resistance and how much HP you need to reach your target speed? Just curious, how many attempts have you done at Bonneville?

CHEF_EG_1

rx720bt: all valid questions and concerns. MarvelSpeed in TX (Dallas, I believe?) is doing most, if not all the motor build. I have emailed them (Don Marvel) with the exact specs of what I want. I am still awaiting a reply on pricing.

With a full fuel cell (18gallons), 2-15# nitrous bottles, airbag setup, full rollcage (12pt.), lexan rear/side/ 1/4 windows, 2" chop from the roofline, custom made windshield (2x thickness, with 2" chop already), belly pan, 15x4.5" wheels, GoodYear Eagle Land Speed tires, extra aerodynamic spoilers (either aluminum or carbon fiber), and 2 occupants (a friend has agreed to pay me 1000 to ride shotgun for the ride), I *should* be right around ~2800#. With a 1.92 final gear ratio, a Tremec T56 from either an LS1 or a Viper (not yet decided), the engine tuned to run at a strong 8grand for 3 minutes or more (of the two course choices, 5 or 7 miles, I am choosing the 7 mile one), and 2-200shots of nitrous, I should be well ahead of my required 776rwhp. I am looking closer to 1200, maybe 1300.


With a coefficient of drag at a near perfect .27 based on the CAD designs, and a lower frontal area due to the 2" chop, I *should* be right on the money.

CHEF_EG_1

By plugging in my numbers....


W= 2800
fA= 19.5
Cd= .27
tV= 264

Required whp = 686.95hp
Assuming drivetrain loss of 15%, required crank hp = 790