Date: Sun, 6 Aug 2000 23:36:12 PDT
Reply-To: Mark Dorm <mark_hb@hotmail.com>
Sender: Vanagon Mailing List <vanagon@gerry.vanagon.com>
From: Mark Dorm <mark_hb@hotmail.com>
Subject: Re: Some Questions about the ECU Chip Upgrades- Answered....
Content-Type: text/plain; format=flowed
okay Robert... did you ever add just the chip without adding anything else
and if so what was your gas mileage difference, and what do you think your
power change was, what did you notice???
>From: Robert Lilley <Wolfvan88@aol.com>
>Reply-To: Wolfvan88@aol.com
>To: vanagon@GERRY.VANAGON.COM
>Subject: Some Questions about the ECU Chip Upgrades- Answered....
>Date: Mon, 7 Aug 2000 00:31:23 EDT
>
>Questions about the ECU Chip Upgrades- Answered....
>
>Performance Enhancements-DO they WORK and what will happen to my engine
>
>I am writing this message from a computer in Bozeman, Montana. I will be
>home later to fully respond to the number of emails that I have received.
>
>
>The main question is WHAT is the ECU chip upgrade going to do to my
>engine???
>
>Simply put, your engine will run better...
>
>Why you ask?
>
>The way the ECU responds to the various sensor signals is changed.
>Rather than start the engine lean and use the various sensors to correct
>the
>mixture to the proper ratio, as VW does, the Australian company, starts the
>mixture rich and use the sensors to correct the mixture to achieve the
>proper
>ratio.
>
>What will the effect then be on the engine?
>
>On a stock engine without the ratio rockers, there will be a small benefit,
>The engine will be able to make its power easier.
>If you add ratio rockers or other modifications, there will be a greater
>proportional increase in power.
>
>Consider a box that two people are pushing. One person can just push the
>box
>with all its strength and the other can push the box easily. The one that
>is
>pushing the box at the upper limits of their power will not be able to push
>as efficiently as the other will.
>
>I had a customized T4 2L engine in my 73' VW Bus. It had a Porsche 914
>hydraulic performance cam, Modified 914 racing exhaust, electronic ignition
>AND DUAL- DUAL Throat 36mm Dellorto carburetors. I was getting @20 mpg at
>@70 mph. The power was OK. I switched to LARGER 40mm carburetors. You
>would expect the mileage to decrease, BUT it increased to 30 mph at @70mph.
>It increased because the larger carburetors made the engine run more
>efficiently. I did not have to have my foot in the gas as long to get up
>to
>speed.
>
>In the same way, the ECU Chip should not decrease the mileage but maintain
>or
>even increase the mileage, Because the engine can now run more efficiently.
>The improvements made to the WBX engine have increased the power, the
>reliability and the efficiency all with an INCREASE in mileage.
>
>
>Will the life of my engine be cut short with the new chip?
>
>No, not unless you start driving like a mad person! The life of the engine
>can actually be increased. You would not have to run the RPMs up, shifting
>as high to increase speed. The engine can run cooler because it is not in
>such a lean, heat producing state.
>If you plan to add the chip, make sure all the FI parts are in good working
>order along with the engine.
>
>If you add the 1.25 ratio rockers, there could be some increased wear on
>the
>valve guides if swivel valve adjusters are not used. The 1.4 rockers have
>a
>offset arm so the valve guide should be similar to stock wear.
>
>I had my cam lift increased and added Rhino 1.25 ratio rockers with Rhino
>swivel rocker adjusting screws (911 style) Rather than go to 1.4 rockers.
>
>
>While adding just the ECU chip will get you a small increase in power (Some
>want just a small increase in power) If you want to gain additional HP add
>the various bolt on items discussed- air filter, muffler, ratio rockers,
>quad
>tip plugs, synthetic oil in engine and tranny. Still not enough, when
>rebuild
>time
> port intake, exhaust, increase cam one step, maybe two, counterweight
>crank,
>balance engine.
>
>90>100>115>130+
>
>Later,
>
>Robert
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