Anyone hear of such a thing? I saw one on ebay today... it's basically an NA 13B 6 port lower manifold with no actuators. I couldn't tell if this was a custom job or did Mazda actually make these? If you run no sleeves, I could see how this would help flow.

yup it exists pics



mike

cool... so would it bolt up to an S4 with no modifications other than taking out the ACV and sleeves?

it looks like it would, but the way find out is to see if the gaskets are the same



mike

wierd.

i just took my sleeves out and filled the acuater holes with JB weld..

Dave

hows that working out?

pretty well.. i lost a lil bottom end but the power is suddle after 4k.. its not like all jerky.. its very consistent now and i noticed a increase in power above 6500rpm.. i like it.. but thats just me.

Dave

Were could I find one of those from?

Notice the butterfly valves on the top of the manifold (AUX Ports).

why are they different between the euro and US?

because they are. JK

I think there would be less restricton in the U.S. models. The rotating valves in the euro version look like they would disrupt airflow more than the smooth sleeves in the U.S. versions.

did you also notice that the euro car has a thermal reactor and a distributor?



mike

Do you know what the HP specs are on the euro cars? just curious....

no charcoal canister either!

maybe its in the air cleaner like a 79....



mike

Yes, it does fit....we have this manifold (with removed sleeves and other crap) mounted on my US NA S4 block.....

hey higgi :bigthumg:



mike

great, how did it affect performance compared to an US S4 with the stock sleeves & actuators still in and working?

The one on E-Bay is different than the link you posted. The E-bay item has no provision for the butterfly valves.

the euro car is rated at 148hp @6500rpm and 134 lbs/ft @3000

the ecu, and wiring would be a good upgrade for a gsl-se



mike