Got your pics Jason. Would the '72 stock air filter housing be the same as my car would have orginally had? It was built in 2/71 and is an early Series II.

to my knowledge yes. i believe only the series 1 did not have the flapper...

quote from ztherapy: "Nissan came out with the original "non-flapper" in 1969. Late 1970, smog laws dictated a heat riser be added to preheat the incoming air for the winter. This is called the "Flapper" style air cleaner."

because the stock air cleaner doesn't flow well enough for me, and i don't want to cut holes in it since i don't plan on butchering it. also, the winter/summer flap keeps closing on me when i'm driving and it gets me al hot and bothered....

the ITG looks ok, but i'm afraid that it might have the same effect if my intake backfires. also, i don't believe that it filters as well....

Jason, Is the flapper working correctly?

actually, what it was was some paint on the spring was inhibiting the stretch of the spring.... scraped off a wee bit o' paint and it feels much more solid!

Jason,

PM me what you want for it. I would like to buy a refurbished one from Z Therapy but $300! Does Z Therapy give any club discounts?

aptfast.com also sells air horns, stub stacks and K&N filters. The HS6 SU flange is identical to the 240Z SU carbs. Here are the ram pipes (air horns) they sell ($31.75 each):

They also sell K&N Filters on a different page. May want to compare prices. Their tech support is very helpful.

MIchael

aptfast.com also sells air horns, stub stacks and K&N filters. The HS6 SU flange is identical to the 240Z SU carbs. Here are the ram pipes (air horns) they sell ($31.75 each):

They also sell K&N Filters on a different page. May want to compare prices. Their tech support is very helpful.

MIchael

Damn, its almost a shame to cover up those beauties with K&Ns!

is this seat of the pants HP or actual HP from a dyno readout ? I havent seen any real numbers yet from a dyno that shows a gain from the stock air cleaner box with a K & N filter.

I agree. I haven't seen any actual, factual numbers EVER to support claims of increased HP over the stock air cleaner w/ a K & N.

"Seat o' the pants" statements just don't prove anything. The crew chief for the 2001 & 2002 ITS National Champion (in a Z car) did back to back dyno runs with various air filter assemblies, and reported no gains over the stock set up with K&N's. His word and the word of Scott Bruning (original owner of ZTherapy) are plenty good enough for me.

Until I see Dyno charts that prove the claims otherwise, it's all Mexican food in those "seat o' the pants".

So Carl, you did see some humor in my story about the Mexican food! Your a pal!

Damn, its almost a shame to cover up those beauties with K&Ns!

Aptfast didn't recommend using ram jets (air horns) with K&N filters. They are too long so the opening ends up close to the metal plate at the top of thefilter which restricts airflow. You'd be better off goign with a short stub stack with K&N's according to them. The ram jets are for a sock type filter. Anyone else feel free to chime in if this is totally off base - but it makes sense to me.

Stub stacks:

just noticed this thread is months old. Oh well..

michael

aptfast.com also sells air horns, stub stacks and K&N filters. The HS6 SU flange is identical to the 240Z SU carbs. Here are the ram pipes (air horns) they sell ($31.75 each):

They also sell K&N Filters on a different page. May want to compare prices. Their tech support is very helpful.

MIchael

Where can I get a sock filter for these Ram Pipes?

Try calling K&N tech support.