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N/A Performance Modifications for the NG900 / Old 9-3 This forum contains PERFORMANCE related Q&A's specific to NATURALLY ASPIRATED NG900 and old 9-3.

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Old 04-26-2006, 12:36 PM   #1
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doin some thinking

ive got a buddy up here who wants more power....funny how we all want the same thing, huh?

he's got an NG, 2.3 NA 5speed.
i had a crazy idea. i might be able to source a cheap t25 from cooper, along with the downpipe from when he goes big. if i get an NG turbo exhaust manifold, is there any way to make it work? i know i would probably need something to run ecu wise right? maybe like a 9000 cse ecu since its the same engine? other than that, would it bolt up pretty well, or have i really overlooked something here.

complain, stress conerns, give suggestions, completely bash my idea....i dont care, just let me know what you think as i just thought that up while i was washing my car.

thanks,
nick
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Old 04-26-2006, 12:50 PM   #2
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unfortunately its not that easy. the 2.3i n/a has a higher compression ratio than the 9000 2.3,

iirc its 10.5:1

wiht that said people are always affraid to do it, but still think it would be a fun project.

you would need oil and water lines, exhaust manifold and dp and a intercooler.

I'd say easiest would be to use a either a stand alone, or you could possibly get away with a FMU (rising rate fuel pressure regulator)

to switch to trionic, the whole under hood engine harness would need to be changed.

wiht the higher compression ratio you may be able to get away wiht 7psi. A wide band o2 sensor would be needed to keep tabs on things.

Its probably easier as everyone says to just sell the N/A and get a turbo, but if he is really attached to the car, and can get parts cheaply I think it would be a neat project.
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Old 04-26-2006, 02:22 PM   #3
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I wanted to do the same thing and finally just buckled down and bought a turbo. If he's getting everything he needs and it won't be expensive (would normally cost 3-4 grand by my research to do it right) then I guess you could, but it still probably wouldn't match anywhere near the power you can harness from a 2.0 turbo. However, maybe I'm wrong but, if you could convert to ethanol or something, can't you rock a turbo with the higher compression ratio? I'm not even sure... does he want to get that deep into it?
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Old 04-26-2006, 02:40 PM   #4
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it would be easier to just buy a turbo
but not as fun!
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Old 04-26-2006, 03:13 PM   #5
 
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It's worth a try, just for yucks.

Use two or three stacked head gaskets (Don't take my word for this; actually measure the damn things and do some math to calculate how much gain in stroke this will give you.)

Stroke on a 2.0L is 78mm
Stroke on a 2.3L is 90mm

Get some really, really strong head bolts and torque the fuck out of them. The stock ones are probably stretched already.

Apply boost and see what happens....
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Old 04-26-2006, 03:43 PM   #6
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Couldn't you source a crank and pistons from a 2.3T? It really ins't too tough to drop or lift the motor out...and you would have some room to fit the manifold and turbo with the motor out as well. It would certianly be less work to just get a different car - but the idea applied when I swapped my tran out for a 5 speed
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Old 04-26-2006, 06:08 PM   #7
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stacking headgaskets could work to lower the compression ratio. WHich is a possibility.

Ethanol would be a neat trick. Id say just throw boost at it, and keep it low and monitor AFR's

another neat trick would be to get an APC from a c900 and use that to control boost based on knock! that would be real trick!

of course another car would be needed to use while doing all of this, so the kid still has reliable transportation
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Old 04-26-2006, 07:09 PM   #8
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Another car would probably be needed after doing this sort of thing as well - for reliable transportation. I'd assume there would be many issues to work out after doing this sort of project
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Old 04-26-2006, 07:11 PM   #9
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haha true true, i was just being optimistic lol
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Old 04-26-2006, 07:28 PM   #10
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Me and spoolin900se (mark) have a parts 2.3 and are looking to get a semi running 2.3 n/a. We have a t25, extra dp, and exhaust manifold and a welder. Once we get the reasonably running 2.3 I think we will boost it till it blows and see what it can really take. Possibly this summer.
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Old 05-03-2006, 09:44 PM   #11
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Yeah like other Mark said i really want to do this, i alomst had an auto 2.3 but it had hit a pothole and put a hole in the oil pan and i was worried about the engine being blown so i gave up bidding on it after 600 but now kinda wish i had.
So if you know of any cheap 2.3na's reasonable close to VA/MD let me or other Mark know, i have been keepin tabs on ebay and the paper.
The oil and coolant supplies and returns are there just need to be un pluged and maybe tapped. Just set a mbc at like 5psi and see what happens, if it goes lean ill just throw a resistor on the intake air temp sensor.
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Old 05-04-2006, 06:01 AM   #12
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haha you could do that, or maybe just put some money into a FMU (rising rate fuel pressure regulator)
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Old 05-04-2006, 06:38 AM   #13
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If your going to do this project why not do it right and add something like an Apexi Super AFC+B(oost) stand alone EMS combined with a RRFPR and a custom copper head gasket? If you combine that with a Cam set off a turbo head and some good tuning you could probably run as much or more boost than a Trionic controlled car but less knock sensitivity and security.
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Old 05-04-2006, 12:33 PM   #14
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yeah well i already have my car to spend all of my money on so i am not looking to spend that much on this project. i already have the turbo, manifold, down pipe, ic, delivery pipe, tb adaptor, stock intake, and all i need is the car and some little pieces that i could make up myself.
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Old 05-04-2006, 12:35 PM   #15
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with people doing this on the c900's fairly often im sure it can be done with some pretty good results. have you thought about getting a simple old APC system and using that for boost control?
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Old 05-04-2006, 12:43 PM   #16
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Quote:
Originally Posted by 90SPG
with people doing this on the c900's fairly often im sure it can be done with some pretty good results. have you thought about getting a simple old APC system and using that for boost control?
I already mentioned that, but no one noticed That would be real trick tho
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Old 05-04-2006, 12:48 PM   #17
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yeah i was wondering why nobody picked up on that.

the APC's may not be fancy and all-knowing like your trionics, but if this is just a fun project car an APC will be a cheap source of insurance.
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Old 05-04-2006, 12:53 PM   #18
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well at least you picked up on it...It wold be very neat, and easy and cheap to implement, and also easy to adjust boost values...a few turns of the Pots and away ya go
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Old 05-04-2006, 01:15 PM   #19
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even a stock 900t APC should give enough boost to make that thing run pretty hard.
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Old 05-04-2006, 08:56 PM   #20
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Quote:
Originally Posted by 90SPG
even a stock 900t APC should give enough boost to make that thing run pretty hard.
yea I should have been more clear...I was actually talking about turnign the boost down
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