I have a six port NA 13B in an Austin Healey chassis. It has been recently rebuilt with a street port, and runs a Dellorto DHLA on a Racing Beat manifold. I am going to convert to a Megasquirt ecu and am looking for some hardware advice.

I am looking for suggestions for a throttle body, I am leaning towards a Borla / TWM side draft I am thinking 50mm. Any better choices?

Should I run 2 or 4 injectors? What size? I believe if I run 2, and my math is correct, I can run a 750cc injector at 61lbs. of fuel pressure

Any other info on fuel pumps and regulators, rails etc. is appreciated.
Thanks
Ed

 

You should be able to run a stock rail with no problems. I have that same setup and it looks like you can even keep the pulsation damper if you use a GSL-SE rail.

750s even at 43psi should be plenty.

 

Racehead.au 48mm throttle body kit is what I'm using. Primary only injection with factory fc3s fuel rail. I put down 170 whp with a stock port. Depending on your streetport, your numbers should be higher.