Miata Mailing List: February 1997, Message #149
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   From: (none)

Subject: HKS/Sebring Intake test results

   Date: (none)



Bill Cardell wrote...

 

> M. Roadster Performance wrote:

> 

> 

> 

> > [closing comments]

> 

> > What do I think? I think the HKS flows better and you get better

> 

> > performance. If I chose not to have my spare or toolbox I might've shaved a

> 

> > bit off the 0-60 times and maybe picked up some hp. 

> 

> > 

> 

> > -Percy

> 

> > MRP

> 

> Umm, if you eliminated your toolbox and spare you would also adjust the

> 

> weight of the vehicle as programmed into the Gtech, so you would end up

> 

> with the same horsepower, though possibly faster 0-60 times. The Gtech

> 

> works in hp/lb. FWIW

> 

> 

> 

> bill







So let me get this straight...  Are you saying that you don't get extra hp by 

reducing weight of your car.  



Man, I guess I don't need to pull off my fenders when I take my car to the dyno.  



I also thought my car made most hp in 1st gear... then again, that could just be the 

gearing playing tricks on me.  ;^)



Percy wrote...



> We just bought a G-Tech unit for our shop to use to test part performance.

> 

> It is accurate to within .1sec in 0-60 times and +/- 3hp in measuring

> 

> horseppower. It is a portable unit that mounts on the dash and plugs into

> 

> the cigaretter lighter. This unit could be a big joke but since the numbers

> 

> show some sort of consistency, I think not.





There are soooo many *significant* variables when trying to do a 0-60 test while 

trying to test the effects of a new modification.



Here's some I can think of....



1.  Launch (not all drop clutches at 5000 rpm produce the same launch.)  A good 

lauch is modulated after wheelspin occurs.



2.  Heat of tires.  After a few runs (but not too many as to heat up your engine) 

your tires will become softer and will grip better.



3.  Shifting (!)  The difference between a good shift and a really good shift in a 

0-60 run is said by some to be as much as 1 whole second (especially when you have 

to shift twice with the 1.6 gearing)!



Percy, 



You could better illustrate the possible benefits of the new intake by running some 

rolling times (ie. 50-70 in 3rd gear, 70-100 in 5th gear, etc,.)  Better yet, take 

it to the drag strip and run a dozen or so 1/4 miles.  Also, it's important to have 

what intake you are using a mystery to you.  Have a friend swap in the other one in 

every so often and record the results.



Realistically, I don't see a 2-3hp difference in the top end to be significantly 

recordable by anything other than a dyno.  My butt is not that sensitive and I don't 

think the Gteck Pro is smart enough to take all variables into consideration.



-Shiv