need help with quad throttle body information!!

[jimAE92]

I've got a AE92 FX-GT corolla with a red lettered 4AGE motor in it. It's got T-VIS, but I've heard one with quad throttle bodies and now i really really want them!
I found myself some quads off of a silvertop 20V, havent bought them yet, and was wondering whats invovled with changing things over?
I know ill need an adaptor plate to bolt them onto the head, and im looking for some stacks. But under other parts of this forum i hear people talking about MAP and AFM sensors, and aftermarket ECUs and all this, which has really got me confused..
So anyone who can tell me straight and simle what i need and costs invovled etc, that would be much appreciated, thanks!

[Dell'Orto]

The easiest way would be to get a Link or similar, and go from there. You could try using a silvertop/blacktop loom and ECU, but it'd be more hassle.

[rollaholic]

probably easier / cheaper to do 20v conversion!

the 20v engines are AFM (air flow metered) while your 16V (which is also known as a redtop bigport by the way - as opposed to redtop smallport) is MAP sensored - basically two different ways of measuring the air flowing into the engine.

from what i've read in basic terms the difficulty with the quads being used on other engines is the stock ECU's arent setup to deal with them, hence the comments about aftermarket ecus. additionally i've seen nothing to say that theres much gained from all the work needed to do it in terms of power either, though you will get that nice sound.

a silvertop would give you the quad setup and more power over your bigport, and would probably work out cheaper if you are able to do the conversion yourself.

[Burning Angel]

only the silvertop 20V is AFM, the blacktop 20V is MAP sensored.

[jimAE92]

If the blacktop 20V uses a MAP sensor then can i find a head off of one of those and put it on my motor? is there any point in that?

I'm not so much looking for massive power gains, I'm just looking to get some experience with working with motors... plus they sound cool when finished..

[QikStarlie]

like others said you'l need an aftermarket ecu to run them. an ecu that can do 4d mapping, like the link g3's will give best results driveabillity wise.

[jimAE92]

So how much will a Link G3 set me back? is that like a plug and play ECU or a stand alone sort of system?

[bluemaumau]

If the blacktop 20V uses a MAP sensor then can i find a head off of one of those and put it on my motor? is there any point in that?

..

no not really.

why are you doing this i think will help give the best answers

is it for street? rally? circuit?

[jimAE92]

Mainly for street. I might do some motorkhanas and things like that in the future though. Um is there a reason there is no point in putting a blacktop head on my motor?

[bluemaumau]

it would probley be much easier just putting a blacktop into your ae92.

[jimAE92]

yeah maybe, but that would involve taking the hole motor out, but i can work on the head without doing that can't I? I'm not reeally concerned about how hard it is, the more I learn the better as far as i care.

[Mr Revhead]

why would you need a link??

all you need to do is find a stable vacuum feed.

[QikStarlie]

because, stable vacuum feed is not the problem. thats easy to get around. problem is you have zero vac after a certen thottle % cant remember how much it is on my setup now. but lets say 50% you have zero vacume. so with map vs rpm only, you will either go very lean at wot, and be ok at part thottle. or have a big rich spot at part thottle and ok at wot <- this would happen if you used stock ecu. can be tuned in tps vs rpm. but map vs rpm with tps overlay works best.

[Mr Revhead]

im missing something here....
why would it do that? the ecu would still be getting the same inputs as it did when it had the TVIS setup on it

[QikStarlie]

nar quads give way diffrent signal. quads dont create vacuum past certen throttle % like a said. but single throttle plenum setup does
so stock ecu would think your a wot when you only around half.

[jimAE92]

So I'm looking for an aftermarket ECU that has Manifold Absolute Pressure vs RPM with Throttle Position Sensor overlay? Does the link G3 have that? And does that mean I've got to instal both sensors into the car?
Sorry about all the questions, just trying to get my head around things!!

[QikStarlie]

yeh lem g3 will do it. thats what i use on mine. quads allready have the correct tps. and the link has built in map sensor. so your all good there.
you dont have to use 4d mapping (map vs rpm + tps vs rpm) but will drive alot nicer if tuned right.
you'l be looking at a bit of money by the time you get everything setup and tuned. but its pretty interesting modifcation. and yeh, sound ruthless

[Mr Revhead]

nar quads give way diffrent signal. quads dont create vacuum past certen throttle % like a said. but single throttle plenum setup does
so stock ecu would think your a wot when you only around half.

hmm cheers for that, wasnt aware of that.
all that ecu stuff is smoke and mirrors to me!

[sergei]

nar quads give way diffrent signal. quads dont create vacuum past certen throttle % like a said. but single throttle plenum setup does
so stock ecu would think your a wot when you only around half.

hmm cheers for that, wasnt aware of that.
all that ecu stuff is smoke and mirrors to me!

Sometimes magic smoke comes out and you are left with mirrors....

[soopachargen]

but at the end of the day a blacktop conversion will still be an easier cheaper option right?