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Old 03-14-2010, 11:41 AM   #1 (permalink)
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Was my car previously turboed?help

I recently bought an 01 base from a dealer (looked stock), but since I've had it I've been finding evidence of previous mods. I recently found out that I had AEM Cams and a crackshaft that looks aftermarket. Also the wires to the fuel injectors have been cut and are now tied back together. What makes me think that it might have been turboed (I don't know much about tuning except for bolt ons) is a warning sticker on my passenger side sun shade advises women that the car is has a turbo and they should remove all tight fitting clothing for comfort during rapid acceleration So my question is how can I know for sure? I heard a compression test will tell me because it would have been made low compression. Would I have less performance over another stock prelude? Thanks for any help.
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Old 03-14-2010, 11:49 AM   #2 (permalink)
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May have been, I know on my buddies turbo 5th gen he had upgraded the injectors and had to cut his fuel injector wiring to wire in an OBD1 resistor box.
I dont think a compression test would tell you unless it was rebuilt...no?
Check out the fuel pump and see if it is upgraded or not.

Im just throwin out ideas btw, im not saying it was in fact boosted
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Old 03-14-2010, 02:39 PM   #3 (permalink)
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if it was boosted they would most likely run lower compression.somewhere in the ballpark of 9:1 or 8.5:1. and if u are running lower compression then yes you will have a lower potential to make power while keeping it N/A.i know b/c my lude was designed to be boosted and im running lower compression but i just dont have the cash or time to do it.your car could still very easily be faster than stock but if you race another built N/A lude you will be at a disadvantage b/c of the lower compression.
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Old 03-14-2010, 09:06 PM   #4 (permalink)
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Cool, thanks for the info guys, I'll get my compression checked out.
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Old 04-02-2010, 01:52 AM   #5 (permalink)
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The engine would not necessarily have low compression pistons if it was turbocharged. In reality, the majority of turbocharged Hondas have stock pistons, for better or worse. If it does have aftermarket pistons, then the block is probably built and if it is healthy, you lucked out! Of course, it would be making less power than stock, if it is lower compression, but if you add a turbo you're good to go.

The decal and cut injector clips are a giveaway, though. I don't see why anyone would have the decal (or have installed other injectors) unless the car was turbocharged or supercharged.

As a side note, AEM does not make cams (only cam gears), and I've never heard of a crackshaft (is that like a pipe?) How does it not look original? More importantly...why did you open up the engine? Problems? If you are having issues, I'd get on the dealer as much as you need to, in order for them to make it right. If everything is running fine, then it doesn't necessarily mean anything is screwed.

Doing a compression check may or may not tell you anything about the compression ratio. It depends on the accuracy of your gauge.

Someone probably had it turbocharged and removed it to sell the car. Selling the kit and then the car separately would net them more money, and doesn't mean something really funny was going on.

It turns out my car wasn't quite as advertised, but it's more or less all good in the end.
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Old 04-02-2010, 10:18 AM   #6 (permalink)
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^^ exactly. how do you know what your crank looks like? AEM doesnt make cams, only cam gears and as far as a compression test goes, it wont tell you much rather than your overall engine health. Cut injectors points to a turbo but so would a tapped oil pan. Why dont you look at your pan and look for evidence of a return line. That is unless they used an O banjo fitting.
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Old 04-04-2010, 03:20 AM   #7 (permalink)
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yeah my bad on my original post. I had some typos. I don't know much (anything) about engine work so all this was relayed to me from my mechanic when he replaced the timing belt. The Cam *Gears* are AEM Tru Time, and from what they could see they didn't think that the *crankshaft* was OEM.

The car runs great so no problems there, I was more wondering because I assume, once again not knowing anything about the steps to turbocharging, that the engine rebuild would be the toughest part of the process. If my is built for it I was wondering how much money it would be to get the full setup again. Thanks for your responses.

Last edited by ColinK; 04-04-2010 at 03:24 AM.
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