...testing was completed. Back to back runs with an internally stock ITR. There were no signifcant gains. This leads me to believe that in stock trim, the ITR TB is more than capable of feeding air. Does this mean the Spoon ITR TB does not work? I dont think so. I think we need to test it on a Toda wearing ITR and see if that 70mm velocity stack design helps to feed in more air. It could also be that the intake manifold is the hindrance, too. I think better results could be had on a b16 or a b18c but only if the intake manifold was upgraded as well. Anyone with Spec B's wish to guinea pig the TB?
Matt, it was your car, do you care to comment?

 

hhmmmmm. thanks!!!!

so what kinf-d of an upgrade to the intake mahifold do you think it needs?? bigger?? ported?? upsidedown??

 

thanks for the test, I am still looking for a TB, for my GSR ported w/ port matched ITR intake mani moded to fit a GSR head, I am interested in seeing more results from diff/more tests. I would like to see if it offers gains on a ported IM and ported head running spoon/toda cams, and maybe higher compression ratio - nice job so far

 

I had mine tapered to Spoon Spec's...and what I noticed was throttle response is better than outright power was made....

I too dynoed it and I showed about 3-5whp on the midrange and nothing really anywhere else....

rev-matching and other dancing maneuvers on the pedals required a lighter touch as it would be easy to over-rev....

I think it is a good auto-X/Circuit mod where on and off gas reponse is important whearas drag is PEDAL to the metal!

 

I was thinking that having a stock ITR intake extrude honed would be nice. Again, to summarize, this mod, IMO, best suits either a b16 or GS-R running an upgraded IM (ITR or Skunk2...???) If any other dyno junkies want to try out this TB on your spec b'd car, let me know. Knowledge makes us all go faster.

 

To list all of the mods on my car click on the screen name and scroll down to bio. The test was on a Mustang Dyno, made some runs to establish a baseline, then installed the Spoon T.B.. The h.p. and torque # were almost identical and the trace data from the wideband o2 sensor did not even register a differance in the air/fuel mixture after the throttle body was installed.

As David stated with the stock internals/cams on a ITR the throttle body is not restrictive, therefor the Spoon did not improve airflow. However on a B16a, or B18b (ls) motor with smaller throttle plate/butterfly and mods you should be able to realize gains.

FYI: The factory ITR T.B. retails for $670 dollars, the Spoon T.B. can be purchased for less ( call David @ R & D for prices) Also,Thank David for allowing me to dyno this and sharing the results, good or bad.

Mattj

Mattj

 

Opps. Read it wrong.


[Modified by R0476, 4:06 PM 7/10/2001]