924Board.org

[Mavfan]

Hey, i got a 1988 924s 2.5L, which has the same engine as the 944 up to 88 or so. So...for my senior project (i get to take the last month off from school to do w/e i want, so i chose to work on my car, pretty good idea huh?!) i was going to install a racing cam, and nitrous (crazy i know, but then again i'm 1. but i have a chance to buy a 1988 944 turbo that was in a wreck for cheep, and now my goal is to take the turbo (not the engine) and bolt it onto my 924s. so to accomplish this i need to exchange over the exhaust intake, turbo, oil cooler, computer, intake manifold, etc. all for this to work, but i'm not crazy right? because they are the exact same engine, nothing different, i just got to swap over the parts. So, i'm writting to confirm my beliefs that this is possibe, and anyone who has any doubts, idea's, comments, hints or anything to help. Please comment, because although cars are my life, i still dont have the years of experience dealing with this. Thanks
(also, where should the oil cooler go, and something i've noticed, is, where does the oil cap dissapear to on the 944 turbo, will this be a problem?)

[Khal]

Righto, where's ESC944 when you need a rant?

[ESC944]

I was distracted by my shinny stuff....

Ok so no the engines are not the exact same, neither is the chip in the ECU, the good news is you can turbo the engine, the bad news is its complicated... since its a school project well then... First look up the specs on your car/engine.

The Block and such is the same, infact you will find the oil pan even has the spot for the oil return line for the turbo, even though your S never came with a turbo.

You should do a search on turbocharging, if you intend to set the turbo up like the 944 turbo, then you will have what you need, a Turbo head, turbo pistons, turbo crossover pipe and drivers side engine mount, which is what the turbo mounts to.

Now you can of course use your NA block and pistons if you wish, but you will be limited as far as max boost. If you want to go more than 5 PSI on the boost, which by the way adds a lot of power even at that level, again look at previous posts.

1.)Now if you are thinking 944 turbo levels, well first remember the pistons need to be able to handle that, the rods and crank you can get by on... for moderate boost. Now you will have to add fuel even at 5 PSI, even at 3 PSI... anyway.. you can do this in one of three ways:

2.)Rewire the S and add the KLR and DME from the Turbo... complicated
Go to larger injectors and adjust the AFM so that it reads less air at higher levels, in other words, you trick to run shorter pulses that it would at the appropriate level, this will in essence give you about stock fuel levels, little richer depending... but at WOT then you should see closer fuel deliver, add to that Alcohol and Water injection if you are not using Forged/turbo pistons... and you can handle som low boost levels, not to exceeed 5-6 PSI other wise you are looking for trouble.

3.)You could have your chip reprogrammed and run larger injectors, along with a MAF conversion. Of course thats complicated cause you need the MAF signal to be match that of the AFM and boost/fuel curve in the new chip. Not for the weak of heart, you need someone who has done it or can do it....

4.) you can install additional injectors and using a Manifold pressure switch set them to come on at the appropriate boost leve, say 2 PSI for the first one or 3 depending on how well your setup is delivering fuel. You can also toss in a FMU at a 10:1 Ratio, then go with a single injector for added delivery set it for 3 PSI so you get more fuel over all from the stock injectors do to increased fuel pressure from the FMU when it sees boost at a ration of 10PSI added for each PSI seen in the manifold.

keep in mind none of this is pefect with regard to not modifing the CHIP, sense your O2 sensor will tend to send a signal that you are runing rich if you get to much fuel into the air stream and then the ECU will lean you out.

Any who... lots of options, some easy some not... MAIN THING IS YOU NEED FUEL and a cool charge.

AN INTERCOOLER is a waste of time for anything under 5 PSI, it will act more like a heat adder than a remover and doesnt make a huge difference at low boost levels.

I can go on... but look at all the other posts on the board, the search engien is your friend.....!

[MunkPuppy]

I got 3 words for you: READ THIS AD...


_________________
'80 931 FOR SALE

"It's a shame that stupidity isn't painful"
-Anton Szandor LaVey

[Mavfan]

Wow those replies are a downer... i guess i could just drop my engine out and put the turbo in...but thats also kinda sad because i have 116k on mine, and the turbo has 180k... feels like a step backwards. Well any sudgestions on what i can do for my senior project to get my car flying? Anyone like the racing cam and nitrous idea? or does anybody like the idea of an "exhuast cut-out" that you weld onto your existing exhuast system and then with a flip of a switch you can have the exaust bypass the cat and muffler and go straight out. seems pretty nifty! anyways i could really use some help! thanks guys

[Mavfan]

Wow those replies are a downer... i guess i could just drop my engine out and put the turbo in...but thats also kinda sad because i have 116k on mine, and the turbo has 180k... feels like a step backwards. Well any sudgestions on what i can do for my senior project to get my car flying? Anyone like the racing cam and nitrous idea? or does anybody like the idea of an "exhuast cut-out" that you weld onto your existing exhuast system and then with a flip of a switch you can have the exaust bypass the cat and muffler and go straight out. seems pretty nifty! anyways i could really use some help! thanks guys

[gohim]

So you want to go faster?

How about driving school?

Learning to use what you already have will contribute more to safe, fast driving than trying to throw money at your car.

A good multiple day driving school is not cheap, and you could use whatever money you have left to bring the car up to date on the Factory Recommended Maintenance Schedule. Some of the Car Manufacturers even offer reduced cost driver education/street preformance driving classes for teenagers.

Without a doubt, the engine is probably overdue for the front of engine service. If you pay someone to do this (and is must be done every 30K miles or 3 years, which ever comes first), you will be out $1500-$2500 from this alone.

You could try doing it yourself. How's this for a senior project... Figure $100-$300 for a set of Porsche Factory Workshop Manuals, $600-$700 for the special tools, and $600-$1000 for parts.

[Mavfan]

Well that sounds like a really great idea, and i think i will do that at a later date. only because the point of my project (which has already been approved) was to dyno and drag (i know the 924 isn't a drag car) the car before any extensive work was to be done on the car, add some performance parts, and then dyno and drag the car getting the hp, 1/4 times, 0-60, and torque and calculate the two to see how much was improved by those parts as a learning experience because i'm headed into the auto mechanical world after highschool. Do you have any websites or phone #'s of those places you spoke of so i could better my drving skill. thanks a lot ~kirk

[Helstrm]

The problem with the 924 and all 944's is that they are designed for mid range power... Curves not straights. You can turbo the car if you have the time and some cash. I am doing one right now. But I will tell you to do it right won't be cheap. But if you drag the car I will give you one warning.. Take a bucket to pickup the tranny and rear axles when you are done... These cars are built for power but in moderation,.. Not all at one time from a dead stop... The pic above shows a little more than what you need.. The NA trans will hold up to a turbo motor, at least for a while. The suspension will hold, But don't go pushing it in the turns. You don't need a turbo head, ... Just port the NA head to match, get some turbo exhaust valves and ceramic coat the head. Oh and in the end,... A stage 2 clutch... cha-ching$$$$ $685 and up, Plus a nice MAF if you want to push any power through it.

Now if you are getting the entire 944 turbo car wrecked then I don't see a problem. Pull everything from the DME forward and swap.

In most cases you are better off just buying a 951 but since it is a project and if you have the time any money go for it.