Hey guyz, I finally got my 4age 20V and its in the shop right now and it is getting dropped in as we speak!!! Im very happy that im finally getting this done but there are a couple of things I was thinking about. Well I wanna boost my motor but it is very hard for me to find any aftermarket parts for this engine(pistons and etc.). So I just wanted to know first of how much boost can this motor take with the stock block and head, witch turbo should I use, and where can I get a turbo maniflod for the 20V? Also, if anybody knows a site where I can get some aftermarket parts for this motor... please let me know!!! Thanx guyz.

Quincy V.

the 4age 20v isnt exactly a good motor to boost since its high compression. keep it a NA screamer in my opinion. i think you could use 4agze pistons to lower CR, but im not sure. but i do know, club4ag.com will have all the answers youre looking for.

You can try finding the TODA racing website using the search engine or you can even try TOYSPORT for parts. It would be a big gamble if you boost the 20v if you don't have the proper funds to replace parts that might break. Personally since you talk about adding a turbo, you should have gotten the 4agze. More chances of finding usdm parts over the 20v and there are alot of performance support in the U.S.

I see that u have a 20V swap in your car!!! Its a really clean swap by the way!!! How does it run? Does the VVT kick in properly? I mean, I dont really wana go turbo. Its just that everybody I role with have Civics and Integras and I cant run wit them if my car is 2 slow. I mean if the 20V runs good in my car, I will just keep it N/A and get a bottle . What do u guys think?

This post has been edited by qmoney10457: Aug 29, 2006 - 9:45 PM

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screw a turbo.

Ah! I can tell you how much boost it can take as soon as I blow up mine.

An AE101 4A-GE basically has the same bottom end as an AE101 4A-GZE, with the exception being the pistons. If you install some 4A-GZE low compression pistons, you should be able to run quite a bit of boost.

Keep in mind that you'll also need to fabricate a new intake manifold plenum if you're running a moderate amount of boost, because the stock one can't withstand the pressure.

Also, tuning a boosted AFM-sensored 20V 4A-GE is very difficult...you might consider a blacktop ECU or a standalone ECU and running a MAP sensor.

I'd do plenty of research on club4ag.com before making a decision to go turbo with your 4A-GE.

On a side note, where'd you get your engine, and what are the compression test results on it?

Actually my motor is being put in with a blacktop wireharness and I will b using a blacktop ecu.

I got my motor from a friend of mine. He had an MR2 and he was gonna drop it in there but his car gave him so much problems that he trashed the MR2, bought an S2000, and sold me the motor. But he told me he got it off of ebay but he had no wireharness or ecu so I won a bid for a blacktop harness and ecu on ebay.

This post has been edited by qmoney10457: Aug 30, 2006 - 6:04 PM

Ok, seeing that you have a blacktop ecu and harness, it would be best to go with a MAP conversion for the silvertop. I haven't tried doing that or intend to go that route because my celica is running great except for a a/c problem I had since the swap. Register on club4ag and post a topic on their forum on map conversion for the silvertop. There are alot of enthusiasts on the site that are helpful because they may have already done it. Getting off topic, I think that the 20v silvertop does fairly well IMO. Good peak power over the 7afe. Contact Dr. Tweak to make your harness conversion.

I contacted Dr. Tweak and he told me all I need is the Harness, ecu and ignitor and I should be good. I dont really know about swaps and all that so I hope I dont sound dumb if I ask wuts an MAP?

"MAP refers to as manifold absolute pressure sensor, which is used to monitor the difference in pressure between the intake manifold at outside atmosphere. This information is used by the engine computer to monitor engine load (vacuum drops when the engine is under load or at wide open throttle). When the engine is under load, the computer changes spark timing and the fuel mixture to improve performance and emissions. "
So that said, you will also need to keep the MAP sensor that is located on your passenger side sidewall of your car(sensor that is bolted down and has a skinny vacuum line connected to it from the engine). You will also need this to do the MAP conversion for the engine. Make sure to tell Dr. Tweak what your intentions are to run MAP instead of the AFM on the engine so he does the wiring to suit a MAP setup for the car. But, first ask him if you'll be able to use one of the unused vacuum lines on the silvertop. If he says you can't then ask him if he is able to convert the blacktop wiring for the engine so it will use the AFM(which was the silvertop's original intake setup) Or other alternative is the go on the CLUB4ag forum and find the thread that talks about doing the MAP conversion on the silvertop. If Dr. Tweak said he's able to make the wiring to run the AFM, then you should just do that and buy yourself the ae101 silvertop ecu to run the car. The AFM can be taken out of the pre 1991 4 cylinder camry and be used on the silvertop. I know this because I am currently using the camry AFM with no problems at all Make sure, though, you get a hold of the harness that connects to the AFM. If you can take it from a donor car, then Get as much of the AFM connector harness wiring as you can. I hope this info was any help.

This post has been edited by netrata: Sep 8, 2006 - 10:20 PM

Tweak told me the 20v is good for turbo. When everyone says it cant run a lot of boost, just how much are they talking? What amount CAN you run?

This post has been edited by WH95TE: Sep 8, 2006 - 10:42 PM

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It's not exactly good for boost, but it can be boosted at a low 8 psi from what I read. The 20v 4age is a high compression engine, that's why most people don't recommend boosting the 20v. But, you can buy low-comp piston for the 20v 4age. The silvertop would probably be best since it already has the 4agze bottom end on it. The only problem to boost the silvertop is the AFM having to be in the way. It is possible though.

This post has been edited by netrata: Sep 9, 2006 - 12:47 AM

Gotcha. Thanks So the lower compression on the 16v lets it run more boost? Or is it still going to have problems with things breaking at high boost.

The best 16v 4age engine to consider, especially for boost, would be the 4agze. It already has the right internals in it since it has a factory supercharger on it. Some guys got it from 200 to almost 250+ with a turbo on a moderate amount of boost like 10-12 psi from what I read. And since you can source 4age internals suited for taking boost, just put in some funds and replace them with some aftermarket ones. It would be better if you are considering to up the boost even more. As far as breaking goes, finding replacement parts shouldn't be too much of a problem since its the 16v.

This post has been edited by netrata: Sep 9, 2006 - 1:01 AM