ABV guide

Discussion and technical advice for 84-89 AW10 & AW11 MR2. 3A-LU, 4A-GE, 4A-GZE.

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MarcsMR2
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ABV guide

Post by MarcsMR2 »

Has anyone got a step by step guide for the ABV mod (complete with some nice pics).

Simple enough for someone who cut the roof off his MR2 to follow :lol:

Maybe stick in on the Knowledge Base :?:
Icsunonove
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Re: ABV guide

Post by Icsunonove »

Marc,

There are a few ways of doing it. The way I did it was to make a blanking plate and sandwich it between the ABV and the pipe. Simple as that!

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Charged
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Re: ABV guide

Post by Charged »

I have used Tom's diagram for my blanking plate and can confirm it is a good method to go with.
Whilst I had all the ancilleries (sp?!) out of the way for installing the blanking plate I changed the supercharger oil as there was easy access, this might be worth considering?
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crazylegs
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Re: ABV guide

Post by crazylegs »

yep i used toms method as well. just how a mod should be, simple and it works.
MarcsMR2
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Re: ABV guide

Post by MarcsMR2 »

Well thats sounds easy with just one question, anyone got a pic of the ABV (assuming that's it above) in place?
System-G
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Re: ABV guide

Post by System-G »

Also someone over on the SC forum knocked out a number of blanking plates. I was going to get one, but then thought to myself "Why? The ABV mod had already been done..." Who knows exactly how on our car as it was already done when we bought it, but it seems to be working fine :mrgreen:
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MarcsMR2
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Re: ABV guide

Post by MarcsMR2 »

It's the one above I've been offered by Alister :D

Just need to know where the ABV is to fit the plate.

SC Forum ??? not come across this yet
nick_w
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Re: ABV guide

Post by nick_w »

ok im lost so what is the ABV mod
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Lauren
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Re: ABV guide

Post by Lauren »

System-G wrote:Also someone over on the SC forum knocked out a number of blanking plates. I was going to get one, but then thought to myself "Why? The ABV mod had already been done..." Who knows exactly how on our car as it was already done when we bought it, but it seems to be working fine :mrgreen:


The reason is Garrick, that equalising the pressure by swopping VSV lines around is not the best way to do it. For example Mark found by blanking his ABV off and removing it from teh equation entirely that he made more boost than he did with teh VSV lines equalised. There is potential for leakage when you swop the VSV lines around, there isn't when you simply blank off the ABV.
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Lauren
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Re: ABV guide

Post by Lauren »

nick_w wrote:ok im lost so what is the ABV mod


boost pressure is vented off above 8psi, so when you fit a big pulley you need to stop this because otherwise you'll vent all that extra boost generated to fresh air.
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Lauren
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Re: ABV guide

Post by Lauren »

MarcsMR2 wrote:It's the one above I've been offered by Alister :D

Just need to know where the ABV is to fit the plate.

SC Forum ??? not come across this yet


SC forum.... ;)

PM me if you want to know about it. Basically a private forum for all things SC.
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System-G
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Re: ABV guide

Post by System-G »

Lauren wrote:
System-G wrote:Also someone over on the SC forum knocked out a number of blanking plates. I was going to get one, but then thought to myself "Why? The ABV mod had already been done..." Who knows exactly how on our car as it was already done when we bought it, but it seems to be working fine :mrgreen:


The reason is Garrick, that equalising the pressure by swopping VSV lines around is not the best way to do it. For example Mark found by blanking his ABV off and removing it from teh equation entirely that he made more boost than he did with teh VSV lines equalised. There is potential for leakage when you swop the VSV lines around, there isn't when you simply blank off the ABV.


MMMmmmm... I think a mini bearding session is due on the SC soon. Purely to figure out what's been done and what parts are on it :)
85 MK1 MR2 Track N/Ail | 99 528i SE Touring | 01 Mandarin VX220
MarcsMR2
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Re: ABV guide

Post by MarcsMR2 »

mmmmm bearding :)
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Re: ABV guide

Post by mr2mk1chick »

System-G wrote:MMMmmmm... I think a mini bearding session is due on the SC soon. Purely to figure out what's been done and what parts are on it :)


I was thinking about this the other day before the thread, but 'guess' you can check whether the mod has been done by putting on a boost guage somewhere temporarily to see how mush boost there is, therefore the likelihood of a blanking place.....maybe :-k
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Icsunonove
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Re: ABV guide

Post by Icsunonove »

mr2mk1chick wrote:whether the mod has been done by putting on a boost guage somewhere temporarily to see how mush boost there is, therefore the likelihood of a blanking place.....maybe :-k


Jo, the mod's been done one way or another. There's no way on earth your car would produce a 14.7second 1/4mile if it hadn't.
mr2mk1chick
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Re: ABV guide

Post by mr2mk1chick »

Icsunonove wrote:
mr2mk1chick wrote:whether the mod has been done by putting on a boost guage somewhere temporarily to see how mush boost there is, therefore the likelihood of a blanking place.....maybe :-k


Jo, the mod's been done one way or another. There's no way on earth your car would produce a 14.7second 1/4mile if it hadn't.


:mrgreen: :mrgreen: :mrgreen: ahhh.... you have a point 8)
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MarcsMR2
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Re: ABV guide

Post by MarcsMR2 »

So where is the ABV is to fit the plate?

I'm I looking from above or below the car for this one?
Tony jinxy froude
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Re: ABV guide

Post by Tony jinxy froude »

Lauren wrote:

SC forum.... ;)

PM me if you want to know about it. Basically a private forum for all things SC.


Why is it private............ do you need a special handshake to get in ? :mrgreen: :mrgreen:
mart1975

Re: ABV guide

Post by mart1975 »

didnt even know abt the abv, good stuff
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Lauren
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Re: ABV guide

Post by Lauren »

Tony jinxy froude wrote:Why is it private............ do you need a special handshake to get in ? :mrgreen: :mrgreen:


Yes. By appointment only.. ;)
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