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Location:
Hobart
Registered:
August 2003
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converting 4AGE to Weber Quad Throttle Bodies
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Mon, 06 September 2004 03:57
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I'm now at a point where I want to put in some new cams in the RWD 4AGE, so I might as well convert to QTBs at the same time rather than tune it twice.
I already have a set of old 40mm DCOE webers, 3 ramtubes, 3 unifilters and a redline manifold.
The Microtech MT8 is capable of running from TPS only so what's stopping me?
I assume I still need the O rings between webers and manifold?
Is the standard TPS a switch type or variable?
Any ideas on where to mount the TPS on the side of the weber linkage?
What do I do with the vacume hose from the fuel rail?
Is there a temperature/cold start sender in the standard manifold? Does the MT8 use it?
Does anyone have a basic map for TPS only in a MT8?
What else have I forgotten? Has anyone else done QTB-Webers and MT8 before?
Cheers
Craig
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Location:
Adelaide
Registered:
May 2003
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Re: converting 4AGE to Weber Quad Throttle Bodies
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Mon, 06 September 2004 04:08
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Im doing QTB using 20vs though, on an MT8.
Not sure on the setup of the weber throttles, but have a peek at this pic and you can see how its setup for me.
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Location:
Hobart
Registered:
August 2003
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Re: converting 4AGE to Weber Quad Throttle Bodies
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Mon, 06 September 2004 04:15
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Thanks Takai. Looks like you've got the fuel return from the fuel rail blocked off. That's ok is it?
Can't see the TPS though. But then I've never seen 20V QTBs in person. Can you tell me where it is? Is it the far end of the QTBs?
Craig
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Location:
Canberra
Registered:
May 2002
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Re: converting 4AGE to Weber Quad Throttle Bodies
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Mon, 06 September 2004 04:27
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rallysprinter - I built up a quad TB setup for a mates AE86 rally car.
I found the factory TPS wasn't good enough to run TPS based, so I modified the TB's to take a Haltech TPS.
This picture shows the factory TPS - I mounted the Haltech one in the same space (it took a little fiddling to get it to fit nicely)
You should be OK to disconnect the vacuum hose from the regulator.
You won't need the cold start injector.
The other problem I had was the water outlet at the front of the head hit on the front thorttle body, I did a cut and shut to make it point down at about 45 degrees and it all worked out nicely.
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I supported Toymods
Location:
I renounced punctuation
Registered:
May 2002
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Re: converting 4AGE to Weber Quad Throttle Bodies
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Mon, 06 September 2004 04:29
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You'll need to weld some injector bosses on to the manifold. You'll need to secure the fuel rail to the manifold too.
You'll need a variable TPS. You'd secure it to the Weber body with an adaptor bracket and hopefully a little modification of the end of the throttle shaft will be enough to make it work (depends on the TPS you use). Use the EFI temp sensor and make sure your Microtech can adequately compensate for temperature (which it should be able to do).
This guy did it to an SR20DE.
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Location:
Canberra
Registered:
May 2002
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Re: converting 4AGE to Weber Quad Throttle Bodies
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Mon, 06 September 2004 04:30
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You don't need to weld injector bosses to the manifold - the 4ag has them in the head.
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Location:
Kita-Ku, Sapporo, Japan
Registered:
January 2003
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Re: converting 4AGE to Weber Quad Throttle Bodies
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Mon, 06 September 2004 06:01
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Heya Ben,
is the Haltech TPS a "Spectrol" unit? if not, any branding on it?
Cya, Stewart
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Location:
Newcastle
Registered:
June 2004
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Re: converting 4AGE to Weber Quad Throttle Bodies
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Mon, 06 September 2004 07:13
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What was the type of manifold that you guys used to do the 20v ITB conversion. I am in the process of buying the bits for the conversion at the moment.
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Location:
Hobart
Registered:
August 2003
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Re: converting 4AGE to Weber Quad Throttle Bodies
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Mon, 06 September 2004 07:18
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Thanks guys.
So in summary.
1. Get a replacement TPS and mount it on the far end of one of the webers.
2. Blank off the fuel regulator at the far end of the fuel rail.
3. Mount a air temp sensor (somewhere near one of the bellmouths I expect).
4. Tow the car to a tuner and have them switch the Microtech from MAP to TPS, dump the old maps and set a new TPS map from scratch.
Anything else?
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Location:
Adelaide
Registered:
May 2003
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Re: converting 4AGE to Weber Quad Throttle Bodies
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Mon, 06 September 2004 07:31
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I bough my manifold from T3 in the US. Quite a nice jobby. Some more photos of it at the end of the sprinter gallery on gallery.dysfunction.ws
As for the TPS setup, its at the firewall end.
The fuel return isnt blocked off, its just not plumbed in yet, so you cant see where it goes.
Do note with the T3 unit you have to do a cut/shut on the rear water outlet if you are converting a FWD engine. Because the pipe for the rear water outlet hits the manifold.
Ben used a converted Redline manifold, and i think got away without some of the hassles i currently have. Plus the engine he did it to was a factory RWD engine, so no annoying backward facing water outlets.
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I supported Toymods
Location:
sydney.au
Registered:
August 2002
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Re: converting 4AGE to Weber Quad Throttle Bodies
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Mon, 06 September 2004 07:46
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so get an 'ae86' 4A-GE and the t3 adaptor
the quads and a ecu
and WIN!
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Location:
Adelaide
Registered:
May 2003
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Re: converting 4AGE to Weber Quad Throttle Bodies
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Mon, 06 September 2004 08:10
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I have all of those bar the RWD engine. I wouldnt worry too much, i can juryrig good.
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Location:
Canberra
Registered:
May 2002
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Re: converting 4AGE to Weber Quad Throttle Bodies
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Mon, 06 September 2004 22:33
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| oldcorollas wrote on Mon, 06 September 2004 16:01 |
Heya Ben,
is the Haltech TPS a "Spectrol" unit? if not, any branding on it?
Cya, Stewart
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Stewart - No markings as far as I remember, it's a lousy picture, but, it looks like this:
http://www.tweakit.net/shop/images/tps_01_sm.gif
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Location:
Kita-Ku, Sapporo, Japan
Registered:
January 2003
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Location:
Canberra
Registered:
May 2002
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Re: converting 4AGE to Weber Quad Throttle Bodies
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Mon, 06 September 2004 23:49
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Similar, but, not the same.
They look like they would fit to the same mounts though.
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