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Raize · Joined: 18 Sep 2013 Posts: 453 Location: Scotland

But does it actually make a difference given that the flow restriction is in the head itself?

ThomasJoseph315 · Guest

fiat22turbo · Joined: 18 Jan 2006 Posts: 4040 Location: Portland, OR

So you removed the Venturi that was only on the early motors (makes sense on a swap like your car has). To make it the same as the 79 and later motors (95-110hp). The earliest motors had 125hp due to the higher compression pistons.

You still have it breathing through the CIS system which is effective at what it does, but is also restrictive.

You didn't improve the plenum size or straighten the intake path, etc. Let alone improve the breathing through the head?

Did you perform any dyno or timed 0-60 runs to determine if there are any measurable improvements.

You should read the magazine article called, "Bolt-on Bonanza" to get an idea of what your improvements made on a car that had been dyno tested after each change. Basically nothing helped much until they improved head and ditched the CIS for ITBs/DCOE carbs.

Welcome to 924 NA modding it's a frustrating experience that isn't very productive until you spend a lot of money and/or get really crazy.
_________________
Stefan
1979 924 Carrera GTS (clone-ish)
1988 944 Turbo S (Silver Rose)

ThomasJoseph315 · Guest

ThomasJoseph315 · Guest

nickthompson · Joined: 26 Mar 2013 Posts: 873 Location: Central Georgia

The exit is over here. =========>