need horsepower from nt

[ThompsonRacing17]

hi i have 92 eclipse nt 4g63. my car is currently stock. i run a local dirt track so i need some help getting some tricky power. id like to do some head and intake work and would like to hear some suggestions on precisely what i should do for gaining the most without getting to crazy on money.

 

[GofaST4life]

hi i have 92 eclipse nt 4g63. my car is currently stock. i run a local dirt track so i need some help getting some tricky power. id like to do some head and intake work and would like to hear some suggestions on precisely what i should do for gaining the most without getting to crazy on money.

Hate to break it to you, but without spending "crazy" money, your not going to get a huge amount of power out of an NT.

My first question would be, is this car for track use only?

Most guy who want easy power from an NT go with Nitrous, but if your dirt tracking the car, im not sure NO2 is your safest and most reliable way to go.

You could turbo the car with a 1g setup and run some low boost.

 

[ThompsonRacing17]

Yes dirt track only car. Its all gutted with roll cage. And I really only need to gain a quick 20-30 hp

 

[talontsiawd08]

That is a question that I have always had
That much power can be pulled out from a 4g63 N / A?????
Regards

 

[GofaST4life]

Yes dirt track only car. Its all gutted with roll cage. And I really only need to gain a quick 20-30 hp

Im not sure of the rules within the dirt track world, but I would un-restrict intake/exhaust.

Without NO2 or a turbo, im not sure how easily 30hp would be on an NT. Ive only ever modded boosted cars.

 

[ThompsonRacing17]

I've seen some fast non turbos out there... I've heard they just do some work on the head and intake just not sure exactly what. I'd like to know how much to shave the head..what kind of valve job..etc...

 

[marcman804]

Around how much were you planning on spending? If the car doesn't have any sentimental value Im pretty sure if you check the classifieds such as craigslist and on here you could find a reasonably priced 1g gst or gsx. Just be careful not to buy someone's junk. It may be cheaper to actually buy the turbo model versus getting power out of the NA.

 

[ThompsonRacing17]

Not allowed to run turbo

 

[GofaST4life]

I've seen some fast non turbos out there... I've heard they just do some work on the head and intake just not sure exactly what. I'd like to know how much to shave the head..what kind of valve job..etc...

Machining work like that, in my mind, would not be cheap. But I could be wrong.

Exactly how much power are you looking for in the long run?

IRRC, the highest HP NT DSM was at 202HP or something like that. And thats with A LOT of work done to the car.

 

[ThompsonRacing17]

Hoping to only spend around 1000$ right now I have 114 fwhp.I'd like to atleast be 130. Also my air fuel ratio is 19 to 1. I need tips also on how to correct that

 

[GofaST4life]

Hoping to only spend around 1000$ right now I have 114 fwhp.I'd like to atleast be 130. Also my air fuel ratio is 19 to 1. I need tips also on how to correct that

You'll have to wait for some of the NT guru's to chime in as I am unaware of the NT platform.

But if you looking to change up your A/F ratio's, you need some management devices for sure.

 

[marcman804]

There is some good info in this thread. Check it out and maybe it will give you some ideas...
http://www.dsmtuners.com/forums/newbie-forum/361769-non-turbo-1g-power-add-ons.html
and this thread also... http://www.dsmtuners.com/forums/1g-n-t-tech/12064-1g-all-motor-alternative.html

 

[Fotowntalon]

Not sure how familiar these guys are with dirt cars, via the questions they are asking, and if I am being honest most my dirt knowledge lies in the v8 scene. But for dirt cars as well as NA, you gain way more off lightening (especially rotating mass) than you do off trying to slap on straight horsepower.

 

[1fastlaser]

I would put the hyundai 43cc combustion chamber head on it, a set of cams, good header or custom make one, sheet metal intake manifold. Clean up the intake and exhaust chambers on the head....Put dsmlink in it or a apex AFC, and a wideband and lean that thing out!

 

[T is for TURBO]

Hoping to only spend around 1000$ right now I have 114 fwhp.I'd like to atleast be 130. Also my air fuel ratio is 19 to 1. I need tips also on how to correct that

A/F of 19 to 1 sounds like an exhaust leak. Or a faulty fuel system. My guess is a pre O2 sensor exhaust leak.

1,000 is not going to get you 12.5% power increase in an N/T. I'm sorry to break it to you.

 

[ThompsonRacing17]

I disagree... has to be a way to gain 15-20 HP for 1000$

 

[Marc91GSX]

I disagree... has to be a way to gain 15-20 HP for 1000$

Ported and polished Hyundai Sonata head on an an old school g4cs short block, a good set of cams, and then do all of the stuff the 8cyl guys do (ie: balance and blueprint everything, lighten everything that moves in the engine, etc...) It will run you more than $1000 to do all of that but you can pick and choose what addons you want in your price range.

My guess would be:

Head=+or-$50 depending on source (then add in machine work)
g4cs block= +or- $300 depending on condition (then add in machine work)
Cams= Used ones run about $200 in the classifieds
Exhaust= build your own, cost?
Tuning=I have no clue other than sometype of AFC or you could tricky with resistors and lean it out that way. Probably get you a used AFC for under $200 though.

My guess is you can get your 20-30 hp but you're looking at at least $1300 to get there.

 

[clipto]

I say this story alot. My first car was a 420a I bought a greddy header a 2.5 inch exhaust and a intake for it. Spent like $1,000 and was a total waste felt no difference really, until I turbo charged it but then I had to build the motor cuzz stock internals are crap. These are not no little honda's these cars weight alot. So I would just keep maintanance and daily drive it if you want to build a race car I would get something else. Shoot even a honda will be cheaper and can make good power all motor with a good tune. People are making 277whp on k20's. Goodl Luck

 

[007jimmy]

I would put the hyundai 43cc combustion chamber head on it, a set of cams, good header or custom make one, sheet metal intake manifold. Clean up the intake and exhaust chambers on the head....Put dsmlink in it or a apex AFC, and a wideband and lean that thing out!

I would have to agree here. Some of these parts could be found for cheap and you could do the work yourself. The smaller cc 1.8 hyundai head would bump up your stock compression ratio a tad and the matching intake manifold has a different design then the 1g big port. This particular head has a small port but its not a 2g head. The ports are taller then a 2g but more oval on the sides. This is the hyundai head:

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Yes you have to use a 1g intake manifold gasket, 2g does not work. Here are the intake manifold differences, top view. Hyundai top left stock 1g on bottom and right:

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Port sizes, hyundai up top stock 1g on bottom:

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The hyundai intake has a larger volume plenum then the stock 1g and take note of the shorter runners of the hyundai manifold. Not much info performance wise on this but for a N/A, it should work. The small ports should aid in air velocity and filling the cylinders. Should also help with the low end torque.

Dont forget the 2.4 block also.

 

[ThompsonRacing17]

That's why I'm confused on this car. I say its stock because it dynoed at 114fwhp. But.. I've used 3to different compression gauges and the compression is 270psi on every cylinder.that's very high. Head must be shaved along with block. I measured cams and they are bigger than stock.wtf is wrong with this thing? 114fwhp 133 fwtq. Like I said afr was 19to1. Could that be why my HP wasn't that great? I'm so confused with this damn thing I could scream.

 

[EGLTAWLN]

if you could find a bolt on "CYCLONE" intake and set it up to activate on desired rpm, you could gain some power as well. it would be comparable to the toyota tvis and mazda systems of the mid 80's to mid 90's cars. they were n/a and incorporated this for a better torque curve.

 

[007jimmy]

Where are you getting this 19:1 AFRs? Do you have a wideband? Thats way to lean for normal operations. Now i could believe 9:1, which would be pig rich and cause the car to feel sluggish.

As for the dyno numbers it seems reasonable for an old car with about 140+ hp at the crank stock.

 

[ThompsonRacing17]

Look I had it dynoed. I have the graph if u want to see it. Its 19to1. No bullshit

 

[BogusSVO]

What are the cam specs that you measured?

Look on both the front, timing belt side, and the rear of the head, trans side, and post any numbers you find cast in the head.

Pull the spark plugs and look at the pistons, see if they are dished or flat tops

270 on the comp is wayyyy high

 

[007jimmy]

Look I had it dynoed. I have the graph if u want to see it. Its 19to1. No bullshit

Never said i dont believe you. If you want to post it then yea i would like to see it.