And they've been dyno tested on an NA and a TT.
I haven't posted the results yet because of several reasons.#1 The test runs we did on the TT were at low boost and I think we are going to see more significant gains at higher boost/power levels. Here is the dyno charts for those runs we did.
It was our plan to switch the throttle bodies back out for some higher boost runs, but the car developed an oil leak further into the dyno session and we were unable to complete the testing. We haven't been able to get around to doing it since then, but we will in time.
#2 We are still waiting on orders of both hardpipes and just plain silicone hoses to fit the larger TBs. We are actually attempting to hold back sales on them until we have everything here to properly install them. I'll have to go get the runs for the NA off the computer in the dyno bay, overlay and post those also. We did show 3-4 hp gain across much of the powerband but of course there were no huge gains there. The back to back runs were on different days also, so I'm not here to claim that they made much of a difference on the NA. Shawn does say his throttle response was improved.
Russell Floyd Z1 Motorsports
www.300zx.com
1990+ Nissan Z specialists Used Parts, New parts, Service/Repair and Performance 2877 Carrollton Villa Rica Hwy
Carrollton, Ga 30116 770-838-7777
770-832-9253 (fax) 
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We've installed them on several cars. - 
