how much hp can a 13b 4-port put out?

with headers
weber carbs rb(51 adi)
and large street port

 

I'm guessing up to 220 if you tune it very very very very well.

I'd go for 180-190 to start.

But i've never done one personally, thats just a guess.

 

180HP is doable.

 

Ditto. And more with excellent tuning, well done exhaust and attention to detail.

 

Why don't you remove the huge white borders in your sig?

It takes up like 40% of the space.

 

Assuming you are meaning the 9.4:1 CR 4-port and we are talking flywheel HP, if you get less than 210 you have done something wrong.

I had 160 off a stock engine with a 45 DCOE and a rediculously long inlet (don't ask that's how I bought it). Power was seriously dropping off by 6000 RPM. Now it's been ported and modded and as soon as I can get the inlet matched up and a few other jobs, will fire it up.

Bill

 

I have a 1974 4 port 13b from a REPU with 89 rotors, webber 48 IDA, big street port and racingbeat dual exhaust in my 80 SA.

Dynoed at 168 rwhp even with a horrible miss at max rpm which was crummy arcing spark plug wires. (it's the big dip at the top of the graph)
I'd say my motors good for 200-210 flywheel hp.

car here: http://users.rcn.com/brandyc/fb.jpg

engine: http://users.rcn.com/brandyc/3.jpg

dyno slip: http://users.rcn.com/brandyc/DYNO.jpg

-tony