I have a 13B 4 port. It has a big streetport running a ho0lley 600. What jet sizes should I run? Thanks. I have 66 primaries and my header was glowing red tonight

 

Changed my jets to 63's and running a little better. Got a stumble below 3k then it's ok.

 

This is something I myself am very interested in.



I have heard that with a ported 13B you should be running either a 650 DP or a 670 DP.



As for the stumble is it happening just as the secondaries open?



What is the fuel pressure set at? It should be right at 6psi.



Were the headers glowing at idle or after a good rompin'?

 

Running 6psi. Also header is not glowing since I backed off to 63 jets. Changed acc pump to a 50cc. Stuble is right off idle until 3k. after that not bad. Bought a air/fuel meter to kinda read where I'm at

 

I'm running a Holley 770 DP Street Avenger with 74 primaries and 80 secondaries. I have a very large street port primary and a big fat bridged secondary. Mix that up with a 7" Camden blower and a RB dual presilencer exhaust and you get some really sick power mixed with a nice flame show. I am surprised that you went to smaller jets and the glow stopped. I just changed to the 770 from a 600 with 65 and the 13B ran so lean that it fried a couple of things in the motor. Snatched the 13B out and went right through it and it likes the polethera of fuel it is getting now. My pump is a Aeromotive A1000 with a System1, 8" long 100 micron filter. I am running a -10 line for a feed and a -8 line for a return. All this fuel is at 9psi.

You do have to consider that this is waaaay overkill for a NA or milder ported engine, but from my experience, the Rotary loves fuel.

 

[QUOTE] I'm running a Holley 770 DP Street Avenger with 74 primaries and 80 secondaries. I have a very large street port primary and a big fat bridged secondary. Mix that up with a 7" Camden blower and a RB dual presilencer exhaust and you get some really sick power mixed with a nice flame show. I am surprised that you went to smaller jets and the glow stopped. I just changed to the 770 from a 600 with 65 and the 13B ran so lean that it fried a couple of things in the motor. Snatched the 13B out and went right through it and it likes the polethera of fuel it is getting now. My pump is a Aeromotive A1000 with a System1, 8" long 100 micron filter. I am running a -10 line for a feed and a -8 line for a return. All this fuel is at 9psi.

You do have to consider that this is waaaay overkill for a NA or milder ported engine, but from my experience, the Rotary loves fuel.[QUOTE]



......can i have it...