13b six port questiones
 

Hello !

We are planning to rebuild / modify a 86 13b six port ,

-Streetported
- 44 weber on racing beat inlet , holly "blue "fuel pump.
-stock ignition , so far .
Exhaust not complete ,

Anyone with a Hp / Tourque guess on this combination ,

Best reguards

Puma-rotary .

welcome ... :)
:confused: not quite sure what a 44 Weber is. the IDA is the only one that i know RB sells and that's either 48 or 51. did you mean 45 or 48 by any chance, with DCO(E) manifold? please correct me or clarify ...

with a streetport, i'm sure you'll top 200 HP (not sure what kW that is in Norway), but how much above that will depend on fine-tuning. :)

Thanks for the reply & welcome mr "diabolical1 "

The RB manifod, is the type that wraps around the top of the engine , i guess you could call it a ( side draft setup ) . Ive read some where that these only were sold in the english market , but not shure ..

Carburettor is the DCOE "side draft" 44 / 45 weber , as you said . I might think the length of the manifold will help us upping the low end torque, compeared to a short manifold used with the IDF carb type , just a thought . I guess we will just premix the gas manualy to start with , or if anyone has some other optiones when not running an OMP , just let hear of you .

Any hints etc are welcome :-)

I ran a simular set up. I had an 86 six port with 89+ (higher compression and lighter weight) rotors and rotating assembly all dynamically balance, street port, high pressure oil relief, TII rotor housings (exhaust large street port), I retained the 86-88 lower intake with functioning auxillary ports with a Racing Beat upper DCOE side draft with a Dellort'O 48mm DHLA. I ran two exhaust systems, a short collected and a long dual. I didn't dyno, but consensous was 200 hp at the fly. I regularly beat up on Mustang 5.0's (lightly modded) and Turbo II with exhaust. I'd expect (realistically) any thing from 178~210 at the fly wheel.

~Mike........

Well when racing beat dyno'd that combo they got 211 @8100RPM. However the length of the trumpets makes a significant difference, as 2" lenght change moves the torque peak by 500RPM. Or to put it another way, you can have 10HP more at 5500 or 15HP more at 8000.

Peak torque was 160ish.

All of the above flywheel figures.

Thanks for great info and help boys !

Any more sugestiones on what types of torque this baby will produce , and if possible in NM " newton metres " .

Best regards

Puma rotary

If you want to know the torque curve, you can calculate it yourself.


P=Power in Watt
M=Torque in N*m
n=rpm

Which gives you:

M=9550*P/n

That way you can plot the points along the power curve.... If you really want to

I stole this formula from another guy, im not THAT smart

Here is an article with some HP/Torq numbers for you to compare. You need Adobe Acrobat to read it.

http://www.twminduction.com/ThrottleBody/carb_vs_fi.pdf

MPM, do you know the magazine name which that article was written for? Drag Sport? I've been trying to find a mag that does real articles on building rotary engines/cars. If this is representative of normal articles, I definately need to subscribe.

Thanks,

Glenn

It was Drag Sport. A real mag that does in depth stuff like that is rare. RX Tuner is pretty close but still not as informative, not yet anyway. They are young and will grow. I'm looking forward to that.