most possible whp on nonturbo 2g all-engine

**EclipseParadise** · August 3rd, 2006, 02:43 PM

hey guys,

i'm wondering how much wheel horsepower you think is realistically possible with a 420a engine going all-motor but with as many performance modifications as possible keeping it naturally aspirated?? Also include a performance engine rebuild, like boring 60 over, upping compression, lightened pulleys, bigger throttle body, tuning, etc.

I'm trying to decide if I want to keep going n/a and shoot for the highest whp i can, or if i should turbo it and get everything i can out of it...What do you guys think?? I'm having serious trouble deciding.

Thanks.

note: if i were to turbo it, i would definitely rebuild the engine as to fully support going that route....I'm not one of the fools (in a civic) who just slaps a turbo kit on an engine not built for it.

**my3awds** · August 3rd, 2006, 02:56 PM

On a 2g 420a 2.0? It's a hard and expensive road to go down the N/A power path with the 420a. Even if you do bore it out to accept larger pistons, you'd still 'maybe' only get .2 L of displacement total if you're lucky. Then upgrading the head components to accept a large cam profile is also neccisary to get bigger hp numbers. The money that you spend on the upgraded internals, the maching, and time you spent on assembly would not gain you the horsepower that I think you want.

For that kind of money, it might be better spent to upgrade the pistons to turbo-dished pistons, mild cam profile to keep your springs and retainers stock, and purchase either a turbo kit or assemble one yourself if you have the ability. You would have spent less then an N/A build, but gotten much great power limits. But if you have money to toss and your primary goal is N/A power, it obviously wouldn't be in a 420a.

In the end, the ultimate cheapness is to just sell the n/a car and purchase a pre-turbo car.

**OldDirtyNoSeven** · August 3rd, 2006, 02:58 PM

You should get to 180 whp with the stock rods and pistons

the rods in those engines are the HUGE limiting factor
they don't like to see over 6k very much, and if they do they also like to see daylight vis making a nice "window" in the side of the block

**whiteautogsx** · August 3rd, 2006, 07:48 PM

jack has an n/a too and i think at one point he found a supercharger for it. just another option i guess, it would definitely be different to see a supercharged 2g eclipse. you should probably check the neon or avenger forums since your engine is also found in those cars.

**EclipseParadise** · September 27th, 2006, 12:19 AM

ok. so i've decided now to screw the whole going n/a only thing. im looking to get the most power i can (doesnt matter how expensive unless its over 7k really; i will save)...what DOES matter is this: CA street legal. if i can get a CARB exemption on it or at least pass smog, then i'm in. let me know what info you've got for my car. if i (with your help) can find a legal way of legally or at least somewhat legally get me around 300 hp, then i will keep my eclipse and completely finish it as i the dream car i first saw it as. i still have the lists of cool things i want to do, but dammit im missing the power...and i dont just want to sell and get a factory turbo car. help me out.

i looked around for the supercharger kit, and i found a shady looking electric supercharger kit by tommy knight. when it comes to forced induction, i would much rather turbocharge even though superchargers are 'more linear.' i recently came across a turbo kit for the 420a by slowboy racing that interests me. but like i said, i have to have some way of making this at least partially legal. you guys should know by now that im mechanically inclined and 10+ hours of labor doesnt scare me at all.

shoot me up with ideas. i want long term ideas....rebuilding the engine for complete support, new pulleys, clutch/transmission, etc. everything you can think of.

**Shane916** · September 27th, 2006, 07:06 PM

There is no LEGAL way to make the N/A fast. Yes there is Nitrous which is very illegal and there is Hahn and Star whom make turbo charger kits for the 420A Eclipse, both are also ILLEGAL on the streets. The only CARB Legal products you will see for the N/A Ignition/Intake/Header/Exhaust.

**98spydert** · September 27th, 2006, 08:26 PM

Greddy makes some CARB approved kits, not sure if they do one for the 420A though. Sorry that doesn't help :(

Best bang for the buck, nitrous. From your work, I know you'd do it right and not just slap it on and go like all of the idiots who blow their engines up do.

You can pass smog easily, just take the bottle out. Last time I worked with nitrous was about 6 years ago, but then the kit itself with no bottle wasn't disqualifying and didn't bother the police. Things may have changed for the worse though knowing CA.

It's power on demand though, especially with the no brainer throttle activated kits.

**Shane916** · September 28th, 2006, 01:13 PM

GReddy only makes the CARb legal turbo charger kits for the 4G63T :) and its like a 18G and you pay $2,000 for it. Nitrous the Cops are pretty good at checking the lines in the engine bay. Unless you can totally conceal them which is possible.

**my3awds** · September 28th, 2006, 02:25 PM

The only legal way to do a 300whp goal without breaking the bank like you want is to sell the car and get a different format to start with. You said something about just as long as it's under 7k, there is so much you can do with 7k plus the money you would bring in from selling your car. I know you just got in that little accident so you might not sell her, but hell with 7k, you could keep your RS as a daily driver and build up another car since you mentioned you aren't afraid of 10+ hours of wrenching. Think of all the cars you could purchase as a great 300whp base!

$800-$3000:
1G AWD or FWD DSM turbo
95-96 AWD or FWD DSM turbo
93-95 Subaru Impreza
84-92 Ford Mustang
1971-1974 Nissan/Datsun 240z

All of these would be an excellent base to build a 300whp CA legal car with very little moneys. I'm sure there are others that I haven't listed, but those 5 have alot of support online so if you have any questions/problems you can get quick and easy help. Doing a 420a to 300whp legally is going to have to be outside of CA. Keep your sweet (relyable) RS, get another project car :)

Manny

**EclipseParadise** · September 28th, 2006, 04:20 PM

hmm..good idea manny, and i've thought about it before but i dont want to pay 2 high insurance bills, registration, etc. i've thought about getting a street bike on the side since they're fairly inexpensive. Since I got those sponsorships though, im going to be putting a lot of money this year into those products that i can get for like 1/4 the normal price; and so far it looks like that will mostly be cosmetic and entertainment related products.

BUT as soon as that crap is all done, im right back looking at performance. im wondering how much of a hassle/risk would it be for me to get SBR's 420a turbo kit w/ intercooler and fuel upgrades, and just take it all off for smog inspection?? i realize its like a 10 hour job putting it on and taking it all off, but the thing that makes me nervous is the tuning part and if i build my engine for forced induction, how will it do without a turbo for smog?

Also what do you guys think about this system that DEI Design Engineering came up with for cooling air intake, fuel, etc with CO2..Its called the Cryo2. I'm not sure what to make of it. How effective is it really?

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