i definately agree those numbers have to be on an engine dyno. i know paul yaw is the man, but 156rwhp out of a stock port 12a?

 

Did you receive an AFR graph to go along with the hp/tq graph? While your average may be 11.5, did it vary across the rpm range or happen to follow the hp line in the upper rpm range? It would be nice if you could monitor/log fuel pressure throughout the run too.

Your afr's are more in the range for a turbo, too rich for NA.

 

We had a sniffer in the pipe but it wasnt datalogging with the dyno software. It was a standalone gauge. I just eyeballed it during the runs. It varied b/w 11.3 - 11.6 under load. I agree - its pig rich.

I'm hoping just some smaller secondaries should do the trick. Along with the direct fire ig. Is 20 more hp too much to ask?

 

You might be even richer than the reading. The tailpipe sniffers have a tendency to pull in outside and read a little leaner than what the engine is really running. I would weld an O2 bung where the 2 exhaust ports meet in your system and test again. You don't need to do this on a dyno, street/track tuning is fine for leaning out the carb.

There's 2 things that concern me about your graph. 1. The torque curve shouldn't fall off as quickly, it should be much flatter. 2. After 5k, both lines are too erratic. While it may be partially due to ignition, I suspect fuel flow is a problem too. Once it's leaned out, that part of the curve may even out.

 

When you suggest fuel flow - do you mean FP or the jets?

I've been kicking around the idea of a cockpit AF gauge. Not sure which has the best bang-for-buck. The AEM is the most common (not sugg its the best).

 

He means a drop in fuel pressure. Do you have a regulator or fuel pressure gauge?

 

Yep - I have a Holley FPR.

 

what fule PSI are you running... plx makes a gr8 wideband... thats what you need a wideband not thos stupid rainbow ricer gauges

 

2.2 from his first post

 

thanks over looked it read that post the other day... i thought that the stock it was 3.5 psi? is this right or wrong? im running a holley and its been along time sence i was stock

 

Nikki's do best b/w 2.0 and 2.5lbs


My ignition has been hacked up - and I need some help unraveling the mess.

1. There are two wires going to the coils from the firewall. One blue, other black. I assume power and possibly ground?

Also, the two wires from each of the igniters are hacked as well. Only three wires out of the four make it to the coils. The larger wire on the trailing coil is cut and isnt connected.

Thx