I am looking for some performance mods for my SOHC that are reasonable (not looking for 300 h.p.) Just trying to get it up to atleast 200 HP Then later if possible 250 HP or somewhere in between that without nitrous (my engines has about 150,000 miles on it.) Becuase right now I have on it a ractive Cone airfilter (still have stock plastic too throttle body) and i also have 7mm plug wires on it. I don't know what brand they are, all they say is, "7mm ultimate protection made in USA", and their red. For exhaust I have a Leaky Catylic converter, stock muffler, and what appears too be a echo box on the end. note: I bought this car off of E-bay it came from Ohio and they said it was a NASCAR exhaust yeah right. I'm thinking of getting the MSD 5-street ignition and 8.5mm superconductor plugs wires becuase the plug wires on my car right now don't look very new so i'm sure they need to be replaced. Alright I've described my car too the best of my ability. Toss me some ideas.

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She's my baby!

~Woody...

I honestly don't know how realistic that goal would be.

However...

I don't see you getting very far without nitrous. That alone will probably put you close to your goal and can be done for much cheeper/easier than anything else. It's one of the best bang for the buck mods out there and can be used on any car in any way. You should also look into running Premium fuel all the time.

The honest truth is, the SOHC motor is very different from its DOHC counterpart. It uses its own parts and electronics, and is put together real cheeply to help keep the overall cost of the car down. I don't even know if there's an aftermarket downpipe available, an UDP, or if any of the fuel controlers on the market for our cars will work.

I understand you're probably really attached to your car and selling it for a DOHC car would probably be out of the question and a motor swap would be waaay out of your price & mechanical league. Unfortunately, the SOHC motors aren't the greatest starting platform for making HP so you really have that going against you.

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06 Blue EVO 9

well Some how I kind of Figured there wasn't much too add anyways probably just exhaust and maybe ignition (just for the MSD name) I've heard of advancing the timing a little bit but then you really have to know what your doing. Yes, sadly swapping out the engine is way out of my mechanical skills I will admit that. lol The subject of using nitrous. Is my engine have too many miles on it? Plus I don't have the money/time too take it too somebody if I do blow my engine. Well i'm happy even though it doesn't have the power to back it up it's a good looker even stock (I've had lots of compliments and talk about a total chick magnet ! alright well thanks for explaining too me the whole story. I didn't think there were too many mods either for the SOHC out there anyways. But too what extent do u know that stock vs. stock what can the stealth handle (note were still talking about the SOHC) can it easily take cavaliers, hondas to an extent?

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She's my baby!

~Woody...

We could do the "tow it behind a TT mod." That might pick up the horsepower a bit...

You can't base engine health soley on mileage. pull the plugs and do a compression test. look at the plugs that you pull out. take a flash light and check out the pistons.

You car might be healthy enough to run nitrous and not worry about it. provided you set it up right.

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Bad decisions make good stories.
Look at it! LOOK AT MY @SS AND TELL ME IT'S PRETTY!

One thing to keep in mind with an aging motor.. As you add more power to each cylinder your increasing the pressure inside. If your Piston rings are wearing out they will go pretty quickly. That and possibly the head gasket if that has never been changed/head overtorqued. And numerous other seals/components.
So adding that 75-100 shot may not be a good idea.

If you don't want to blow your motor, keep it stock...

I like that idea...


But yeah I wasn't thinking anything very big for nitrous maybe like a sneak peak bottle ( I think that's what it's called) yes, something very small like 50-100 hp boost or even is that too much?

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She's my baby!

~Woody...

The guy you might want to talk to about Nitrous would be VR4Maniac AKA Matt Clinton. I have almost no experience using it.

I am 99.9% postive you can use the same underdrive pulley as a DOHC.

I'm not sure what an underdrive pulley does. I think it's the one connected to the crankshaft on the bottom of the engine? what does it do besides being lighter? the aftermarket pulley?

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She's my baby!

~Woody...

It frees up HP lost from the motor from having to turn your accessories (AC, alternator, & power steering) by replacing it with a smaller & lighter weight pulley.

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06 Blue EVO 9

I checked out 3SX last night and they actually have a stock size crankshaft pully for $179 it's only 1.8 lbs vs. the stock 8 lbs one and it's CNC machined also. The unorthordox underdrive pully that they have is 1.5 lbs but does not support the SOHC. That one is $249 with the extra belts and it slows down everything with the underdrive pulley (that's what it says) Also it won't work on my SOHC. So I might consider on adding that CNC machined crankshaft pulley. Does anybody know how much HP this will free up? I know not alot but easier on the engine anyways.

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She's my baby!

~Woody...

I the weight difference is not that much so I would go with the stock size one anyway. You alternator will appreciate it if you deciede to add a stereo system.
The actual hp increase I'm not sure but you should notice the motor will rev quicker and a little better accelleration(=more hp).

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'94 vr4- Now with extra slowness

What about a sc? I thought there was a few places making kits for the sohc.

My first stealth was a sohc. I thought about sc or somethng but I really wanted the awd.

sam

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92 Stealth R/T TT - 13t's installed. (SkunkWorks on 3si.org)

hey,

I was talking too my dad tonight and i was telling him about the lighter CNC machined crankshaft pulley it would rev up quicker and add some performance but i do have about a 600 watt stereo in it now. And the heavier (Stock) pulley would act alot like a flywheel. More strain on the engine when getting going but easier while cruising. I disagreed with him at first but then i guess he won. lol But anyways I was looking at the "3SX Custom Aluminum Crank Pulley Kit" at http://www.3sxperformance.com/engine.asp So it almost cancels each other out in the long run. Let me know if my little "Theory" is correct. Cya later,


P.S. Samco I did see a supercharged 3000GT on E-bay a while ago it had a modified M-90 supercharger on it. I think it would be way out of my mechanical range and too take it too somebody too do it would cost Way, way too much.

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She's my baby!

~Woody...