i wonder if anyone would have a ball park figure of my flywheel hp figures on the following setup (educated guess at least

13b with a mild streetport 4bbl mikuni and a pretty free flowing exhaust

 

How do you get a 4bbl mikuni, is that dual mikunis or what ?

ok, I'll guess 160 hp.

 

I`m guessing around 140 at the wheels. I had basically he same setup on one of my previous cars, and it made 135 at the wheels..

 

i was told it was a mikuni and having no previous experience assumed it was?
it certainly isn't a weber or an american carb that i can see.

 

Mikuni's are very similar to webers. Most mikunis are 2bbl side draft carbs. Your not giving enough info though to give even a ballpark figure on your setup. Is the 13B a 4 or 6 port? Just how "mild" is the streetport? There is a big difference in power between a 4 and 6 port with mild streetports. If its a 4 port, you can expect around 170-180 hp at the flywheel, a 6 port could reach almost 200hp, depending on the port size.

 

I could be wrong, but I believe the stock carbs from the 1970s were mikunis... some of them at least.

So basically a stock 4bbl carb from a 70s 13b would be my guess at what you've got.

Jon

 

it is indeed a 78 13b if the po was correct and it is indeed the stock 4bbl

its a 4 port

honestly not sure about the street porting as i didn't own the vehicle at the time the engine was built thus the question. otherwise i'd of dyno'ed it before putting it in.

*as a side note i've worked quite a bit with webbers ad i ran dual webbers on my fiat x1/9 as well as on my alfa romeo

 

Post a pick of the carb. Carbed 13 Bs came with Hitachis.

 

I hate these type of threads, guessing HP numbers never "really" works, there are soooooooo many variables