Not many "bolt ons" will result in good "bang for the buck" boost in HP. Not everyone wants to go F.I. However, you can always take better advantage of the power you already have - GEARS!

 

Thanks,

I know I need to do the research, and I'm going to search through the site but a quick question, Do you think it increases the gas mileage by 10-15%? (from say 25 miles to the gallon to 19-22) and does it suck for highway use?

 

with xviper, not many peeps won't ... I'm going to run a zex dry nitrous with a 50hp shot to see where I'll be come next track day, depending on what the outcome is I might go 75hp but I don't really want to unless I'm really temped. Anyhow, our S (like many had said already) is a beast from the factory so it's hard to add hp from simple bolt ons . I know I can't wait 'til it's warmer again so I can go topless ...

 

[QUOTE=xviper,Feb 28 2005, 08:43 PM] Not many "bolt ons" will result in good "bang for the buck" boost in HP.

 

A header alone probably wont do much. A good I/H/single exhaust and a/f tuning could get you about 20+ whp. However, all those things will almost equal s/c price.

 

It all depends upon which ratio you pick. The stock gearing is 4.10. You can go 4.3, 4.44, 4.57, 4.77, 5.1.
4.3 isn't worth the effort - just not enough of a punch.
4.44 is hard to get - the world's supply has dried up except for what someone might have laying around.
4.57 is the best bang for the buck, but tend to make a bit of whine (normal).
4.77 is also good but you need to be lightning fast at shifting or you'll lose the advantage in acceleration over given speed and distance. Highway rpm might be a bit high for you and can get annoying.
5.1 has to be imported from Japan and is way too high for most applications in N. America.
I found my in city gas mileage actually get better with my 4.44s as I was generally driving in one gear higher just to keep the revs down to where I was more accustomed to before the gear swap. Highway fuel economy will take a bit of a hit simply because you will still drive in 6th gear and the higher ratio will make your rpms proportionally higher. Before the 4.44s, I was getting 39.9 miles per Canadian gallon on the highway. After, I was getting a best of 36.9 on the same leg of the trip. That's the real world difference.

 

I have to disagreed with your findings, nitrous can damage your engine on a S2000 and so can a turbo charger. If you don't make the proper modifications to your gearbox and rear diff, adding to much torque or horsepower may damage your gear box and rear diff. According to some Technicians, nitrous puts a strain on any mechanical aspirated engine. I am running Comptech I/H/E on my 2000 S2000, and the car breathes much better because of less restriction. Horsepower gain is notice according to the air quality outside the car. If you talk to Comptech Technical Dept., they will tell you that it is difficult to dyno a car and get the actual true horsepower gain with no airflow around. Comptech says there is about an 8 to 12 horsepower gain in a natural driving environment. I have an aircool 911S with headers, and a aircool car runs better when the temperature outside is cool. So adding I/H/E does offer some benefits to performance.

 

With that being said wpriller, any addition of hp/tq mods to your car can damage it in any ways. We're not here to say that i/h/e doesn't add hp/tq to our S, we're just saying that it's doesn't compare to FI or nitrous reguarding to feeling the true hp/tq gain as with i/h/e on our S.

 

It all depends upon which ratio you pick. The stock gearing is 4.10. You can go 4.3, 4.44, 4.57, 4.77, 5.1.
4.3 isn't worth the effort - just not enough of a punch.
4.44 is hard to get - the world's supply has dried up except for what someone might have laying around.
4.57 is the best bang for the buck, but tend to make a bit of whine (normal).
4.77 is also good but you need to be lightning fast at shifting or you'll lose the advantage in acceleration over given speed and distance. Highway rpm might be a bit high for you and can get annoying.
5.1 has to be imported from Japan and is way too high for most applications in N. America.
I found my in city gas mileage actually get better with my 4.44s as I was generally driving in one gear higher just to keep the revs down to where I was more accustomed to before the gear swap. Highway fuel economy will take a bit of a hit simply because you will still drive in 6th gear and the higher ratio will make your rpms proportionally higher. Before the 4.44s, I was getting 39.9 miles per Canadian gallon on the highway. After, I was getting a best of 36.9 on the same leg of the trip. That's the real world difference.

 

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xviper,
how much does the gear (4.57) cost. where is the best place to get it? and what are the advantage and disadvantage of getting --let say a 4.57 gear. thanx for your help