Twin-charged 4AGZE (40+ pics!), Supercharged and Turbocharged Options

[Dr_Tweak]

First question you all are going to ask is, why is the turbo way over there? The turbo is so big that it literally would not fit between the radiator support and the engine. So I built an up-pipe to go from the manifold to the turbo.













This is a 3/4" turbo drain, which is huge, but I wanted to make 100% sure that there wasn't a draining problem.













The downpipe....





Inlet and outlet of the radiator modified...







This monster is a 3000cfm fan (not a typo).





This intercooler is the real thing... Garrett core, 3 1/2" thick....



This post has been edited by Dr_Tweak: Apr 21, 2007 - 10:30 PM

[nbg401]

I know this is a very, very old topic. I haven't been on here since I totaled my '94 celica in July of '07, i miss that car. I know some guys who would like to twin-charge their cars.

My question is Dr. Tweak do you have a diagram of how you set this system up? or could you explain how you ran the piping? how well did it work?

I've always admired you work. One of the best I have ever seen. If you could help I would greatly appreciate it.

Thanks,

Nick

[Dr_Tweak]

I know this is a very, very old topic. I haven't been on here since I totaled my '94 celica in July of '07, i miss that car. I know some guys who would like to twin-charge their cars.

My question is Dr. Tweak do you have a diagram of how you set this system up? or could you explain how you ran the piping? how well did it work?

I've always admired you work. One of the best I have ever seen. If you could help I would greatly appreciate it.

Thanks,

Nick

Hi Nick, and thanks to all of you for the kind comments.

Honestly I wasn't real happy with the end result of this system. A lot of it had to do with the fact that I did it for a few hundred bucks for a friend with a VERY limited budget. The end result was that not enough time or money was spent in some important places (fuel management specifically) and that caused some problems (he blew the engine). He replaced the long block and ran it again with no other changes and unfortunately that engine starting having problems as well. I had him bring the car back to me for some diagnosis and to change the fuel management to an AEM F/IC and do some better tuning. After a compression test I found that one of the cylinders was bad so we stopped there. He ended up bringing the car to another friend to have the whole system redone and the engine rebuilt. He felt that the system that I built on the engine was faulty and that I owed him a new engine. Long story short I bought a new engine for him. Unfortunately there's a lot of resentment on both sides and the whole ordeal all but put an end to the friendship.

The moral of the story is:

1. When it comes to your job, don't do favors for friends. You don't get paid for your work, your friend doesn't get the service he deserves, and the friendship may be damaged irreparably.
2. When it comes to doing unusual, out-of-the box builds, make sure you have enough money, don't cut corners, and be prepared for setbacks.

As far as the subject of twin-charging, I think that it could still be done effectively but some things need to be changed to make better use of both the supercharger and the turbo. Also I would have used a larger turbo and found a way of combining the charged pipes instead of feeding one to the other. The bottom line is that the expense probably is higher than the benefit that you get and money would be better spent on a straight turbo build, unless you really want to do something unusual.

-Doc

This post has been edited by Dr_Tweak: Jun 22, 2009 - 10:23 AM