top speed

what steps are neccesary to allow my eclipse to break the 110 shut off?
other than high performance tires are there any other mods needed to be done, and do i need a new computer or can i have mine reprogrammed?

The 420a motors do not have a speed limiter. Your car doesn't have enough power to go over that speed.

OUCH! I'd sell it and buy a GSX or GSX. They also do not have speed limiters on them; and they can do faster then 110mph.

The GSX is limited at 135mph or something like that right?

I have a 95 GSX and I've done just about 160. On a closed course by a professional of course... Haven't hit a limiter yet...

so the reason my car wont build rpms after it hits 105-110 range is? i would except the power explanation if i was redlining but im around 38-4k rpms at this time

so the reason my car wont build rpms after it hits 105-110 range is? i would except the power explanation if i was redlining but im around 38-4k rpms at this time

I've hit 120 in mine with bolt-ons. Very stupid to do even though I was riding on Z-rated tires. Why would you want to go that fast? It just takes a long time for the car to get up to that speed, and even then their may be something causing the car not to go faster. Also please tell me that you do that on 93 or higher gas.

And everywhere I've seen the GST/X ECU has the limiter at ~132. I thought DSMLink over rid that or you can take out a capacitor or something.

so the reason my car wont build rpms after it hits 105-110 range is? i would except the power explanation if i was redlining but im around 38-4k rpms at this time


It takes a good bit of power to push a car that fast. There is a lot of air resistence at that speed and you dont have enough power to push the car any faster. The car being tached out has nothing to do with it. I also hit about 125mph with bolts ons

try biger exhast plus you may not hav enuff fule runing

try biger exhast plus you may not hav enuff fule runing

If you're only going to type 11 words, that's more than enough time to spell those words right.

A 2.5" exhaust will help you get there. I don't remember if you've said you have an exhaust on there. Anything bigger will hurt performance. Fuel is fine.

If you are running traps faster than 110 then you already know how, otherwise you have no business going that fast.

I don't see brakes in your mod list, and notice you drive an N/A car...why bother? You can barely get there, then you have no means of reliably stopping. Bad idea.

To the OP, your car must be an automatic???

I had my stock 141 hp spyder rolling 125. But now it will roll 140 quite quickly, then it runs out of gear.

But about the top speed limiter:
GST is I believe 132 or so like previously stated, but GSX doesnt have a limiter, neither does the 2.4L Spyder.

ok the exhaust post, airflow is not an option. custom ram air intake with 4:1 aftermarket header, no cat and straight through 2.5 muffler(glass pack) so im sure airflow is not restricting anything.
like i said, i know there are safety measurements that i must update before attempting high speeds. ie braking, wheels.....
im just lost as to why it wont build rpms.... is it computer related or power?
if i need a new chip id rather get that first and then add the bolt ons. i dont want to waste my money on something thats being resticted.
and i cant believe you guys are so critical of me wanting to go faster.... i thought thats what all car/speed enthusiasts wanted.... point taken that most of them dont do so with a gs model but ive got too much time/money into it already to just sell it and buy a gsx, not to mention those are hard to find in the area.
it is n/a for now.... im analyzing my options for a complete rebuild next winter and i cant decide if i want to go with nitrous or turbo, but i do want an idea so i'll know what compression ratio ill need to buy parts for. thats why im posting this, to get an idea of what i can get out of 420a
and your assumption is right, it is an automatic. ive had it since 03 and never intended on it becoming this big of a project or i woulda started with a different model

The auto is your problem. Yes are all like cars but going that fast on the highway is not only dangerous to you but to other as well and thats why we are so critical. To be honest the 420a motor is a POS unless its boosted. Believe me I have been there, the ECU is not the problem. Sure you could pull some more power out of it with more timing and maybe leaner a/f ratio but it wont be significant power.

If you want more power you either need to turbo it or plan on spending a shit ton of money on it and maybe be get to 160-170whp

If you think you have a lot of time and money into it now with only lowering and doing I/H/E, wait until you have put enough into it to get it to keep up with a lightly modded GST or GSX. I have a ton of admiration and respect for people like david-b, vanilla_gorrilla, and SilvrEclipse that go through the work of doing it, but I am sure they can attest to the fact that it would have been a lot cheaper and a lot easier to get where they are now had they gotten a GST or GSX instead. If you just plain like your car and don't want to get a new one then go for it, but it will be a lot of work even to get it to where a near stock turbo car is.

As for being critical of your hunger for speed, Silvr's right where I am coming from. IMO, it would be one thing if a speeder was to get in a wreck and be the only one that had to deal with the consequences, but there other people on the road that could be hurt or killed, not to mention the mental anguish the speeders parents, other family, and friends would have to go through should they get wrecked. Its just not worth it man, get your need for speed out on a track.

If you think you have a lot of time and money into it now with only lowering and doing I/H/E, wait until you have put enough into it to get it to keep up with a lightly modded GST or GSX. I have a ton of admiration and respect for people like david-b, vanilla_gorrilla, and SilvrEclipse that go through the work of doing it, but I am sure they can attest to the fact that it would have been a lot cheaper and a lot easier to get where they are now had they gotten a GST or GSX instead. If you just plain like your car and don't want to get a new one then go for it, but it will be a lot of work even to get it to where a near stock turbo car is.

I didn't do my research before I bought my car. It was a 'Oh I want it so I bought it' type deal. If I had done the research, I would have bought a GSX, but I didn't. However, I wish I would have gone straight for the turbo. All the money in bolt-ons and everything else could have easily gone for a rebuilt block and a turbo.

Look at it this way... put every bolt-on on the car, (minus a turbo and spray) and use the stock block with a completely rebuilt head... and you come to less than 160whp fully dyno tuned. Throw a turbo on a stock motor and you start off at greater than that... around 170whp or so depending on what turbo, tuning and all the extra details.



As for being critical of your hunger for speed, Silvr's right where I am coming from. IMO, it would be one thing if a speeder was to get in a wreck and be the only one that had to deal with the consequences, but there other people on the road that could be hurt or killed, not to mention the mental anguish the speeders parents, other family, and friends would have to go through should they get wrecked. Its just not worth it man, get your need for speed out on a track.
:iagree: :1: :iamwithst

I was putting down around 200whp at 9-10psi on the stock block. The motor did blow after 1.5 years so it wont last forever but like dave said its the best option for the 420a motor.

well thanks for your honesty guys... but i never said i was street racing. for now the eclipse is my daily driver, but this spring, im looking to get a family car and set the 420 on a motor stand and go to work....
and just fyi
all my 'dangerous' high speed attempts are usually on an isolate stretch of parkway away from rural areas

If you think you have a lot of time and money into it now with only lowering and doing I/H/E, wait until you have put enough into it to get it to keep up with a lightly modded GST or GSX.

theres more that ive done.... a lot of interior work, and ive went through a few motors. this was my 'dream car' when i got it and id prefer to keep it. sentimental value

The auto is your problem. Yes are all like cars but going that fast on the highway is not only dangerous to you but to other as well and thats why we are so critical. To be honest the 420a motor is a POS unless its boosted. Believe me I have been there, the ECU is not the problem. Sure you could pull some more power out of it with more timing and maybe leaner a/f ratio but it wont be significant power.

If you want more power you either need to turbo it or plan on spending a shit ton of money on it and maybe be get to 160-170whp

:1:

I have also been there, 16 years old and wanting my 420a motor to go fast on the highway, thinking "well, i have a cool looking car now lets see how fast I can go to look even more cooler"

it only took one speeding ticket for me to stop that shit, not to mention now that i'm older I look back and see how dangerous it was for me and others around me.

it only took one speeding ticket for me to stop that shit, not to mention now that i'm older I look back and see how dangerous it was for me and others around me.

Same here now that I think about it. First and only ticket 2 weeks after getting the car... the day my temp plates came off and the real ones went on. The real plates weren't even fully registered at the time so the cop couldn't find any information on my car. Long night. Still drive fast, but not stupid.

haha, the state sent me a letter warning me my next violation i would lose my license.... 23 and i still cant drive 55, some of us never grow up. but amazingly, all of my wrecks have been under 30 mph

I have no wrecks but quite a few speeding tickets, all of them have been dropped but 2. :thumbsup:

Its nice to know people sometimes...

I have no wrecks but quite a few speeding tickets, all of them have been dropped but 2. :thumbsup:
Ah... I wondered how you got those grass stains on your knees...



;) :grinno:

LOL!! No wrecks, 3 times being pulled over, and no tickets. I drive like a grandma now, if I am in a hurry its MAYBE 2-3 over or if I am just out for a cruise its up to 5 under. Most of the time i hover right around the speed limit though.

man i'm like way over the limit all the time. I don't even remember the last time I got a ticket but I know where all the cops hang out and I know where all the good roads are but thats just how it is in small towns.

Ah... I wondered how you got those grass stains on your knees...

;) :grinno:

To bad they were smokin hot female cops... I didn't mind at all.. :smokin:

I have had my share of tickets.

two 10 over speeding tickets

one 25 over speeding ticket

2-3 warnings for speeding

4 warnings for noise violations

one failure to yield right away (resulted in crash)

all this happend within the 1st 3 years of my liscense. I have been really good since and havn't had anything in about 3 years

I have a gs with an exhaust and cold air and I hit 128 no problem. Fifth gear took a while but the road ran out so I had to stop. I was at around 5500 when i hit it so I'm sure it would hit probably 135 before it red lined.

I have a gs with an exhaust and cold air and I hit 128 no problem. Fifth gear took a while but the road ran out so I had to stop. I was at around 5500 when i hit it so I'm sure it would hit probably 135 before it red lined.I bet the tires on your car weren't even rated for that speed...
:rolleyes:

I bet the tires on your car weren't even rated for that speed...
:rolleyes:

Pretty good chance of it. lol

i would get a (fcd) fuel cut defenser, i saw one at intense motorsports or try xs eng they probblu have one! as far as top speed its limited bye the fuel supply, when ur car reaches A certin speed the computer trigers the injectors to stop spraying in turn u cannot go any faster! a fcd tricks your computer to think u are actually going slower so that u can go that extra 20 or 50 mph.

i would get a (fcd) fuel cut defenser, i saw one at intense motorsports or try xs eng they probblu have one! as far as top speed its limited bye the fuel supply, when ur car reaches A certin speed the computer trigers the injectors to stop spraying in turn u cannot go any faster! a fcd tricks your computer to think u are actually going slower so that u can go that extra 20 or 50 mph.

There is not a SINGLE correct thing in this post. :rolleyes:

Wow... :uhoh:

i would get a (fcd) fuel cut defenser, i saw one at intense motorsports or try xs eng they probblu have one! as far as top speed its limited bye the fuel supply, when ur car reaches A certin speed the computer trigers the injectors to stop spraying in turn u cannot go any faster! a fcd tricks your computer to think u are actually going slower so that u can go that extra 20 or 50 mph.

or 10000000 mph yeaaaaaaaaaaaa!!!!

school is for losers!

Ok this thread is closed for many reasons...

1) Whatever the answer to how fast these cars run, it's much more important to make sure your car is able to handle the speed. Meaning the tires better be rated, suspension better be stable, better have some great brakes to stop that thing, should be done on a closed course, and the driver should be able to handle it. I'm pretty sure that most of the people here claiming that they've done 1xx-mph would have no idea what to do if a tire blew out at those speeds.

2) It's stupid to go that fast on the street. Unless you have a built car AT THE TRACK, no one should be going that fast and endangering the lives of others. Coming home today on the expressway, there was a nice pileup because of a Ricer. Nice chunks of twisted metal, and it didn't look too promising for the other driver. Nice.

3) FCD have nothing to do with the speed limiter set by the ECU. Don't post information that is false and not backed up by any proof of your alleged claims. If you have proof of that, PM me and I'll reopen the thread for you. Seems fair.

4) If you really want to find out how fast your car goes without the proper setups and space, do it. I hope you get caught and hurt yourself. Then come back here and tell us how fast you went to jail. I think that's the info everyone here and everyone visiting here can use and hopefully learn from.

Thank you.
/D