actually... i just took a piece of the ring landing off one of the pistons... Not a lot of damage... piston... couple of valves... the problem the LABOR involved to fix it... picked up a lightly used 4.0L for $900!

stlwagon said:

First off... Nitrous is a power adder, it's just not forced induction which I also assume is what you meant in your title instead of fuel injection?

John (fishingjts) windowed his block on nitrous.

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125 shot... sprayed at about 2000 to 2200 RPM... broke a piece of the ring landing off...


ummm... spraying 500HP? I got the feeling a STOCK LS2 is not going to handle a 500HP shot... so it's really not a very good comparison... the problem with the 4.0L is the hyperpathic pistons... the ring landing is very thin due to the rings being so close to the top for emissions... they do not handle detonation very well...

supercharger or turbo really won't hurt your gas mileage... problem people have is their right foot gets a lot heavier after the installation... which DOES effect gas mileage...

Jshem746 said:

Ya, im guessing a Mod changed my title, its suppose to b Forced induction. But he was probably spraying a crazy ass amount or sprayed in low rpms or something. I mean a kno a crazy LS2 that sprays i think a 500 shot and his crap hasnt gone kaboom yet. i just want some power on reserve w/o hurting my gas milage.

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nope... actually it didn't run too bad once i fixed the spark plug... although the valve train was a tad noisy, going clackity clack clack.. and the exhaust back fires were pretty interesting... LOL!

problem is the 4.0L is a PITA to work on to fix something like that...

stlwagon said:

I thought you poked a hole in it. My bad.

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yes... you force more air in and then you add more fuel to get the proper Air/Fuel Ratio (A/F). Which is why when you buy a Supercharger or Turbo kit you can either:

A) Buy a complete kit which includes a "canned" tune
B) Buy without a "canned" tune and have your local performance shop do a custom dyno tune...

The "canned" tunes are usually very conservative and run a the rich side... to get the most out of you new SC or Turbo a custom dyno tune is best...

In the case of N2O, since the S197 has a returnless fuel system the easiest thing to do is go with a "wet" N2O kit... Not only will you be spraying N2O, but you will also be spraying gasoline... the additional gas is, like you said so you don't run lean...

Jshem746 said:

im assuming its a built motor, lol. dont sc and turbos inject more air into the engine thus causing a bigger bang resulting in more power? if u have more air, u need more fuel as well right? unless u wanna run lean, which im gonna say is most likely bad for ur engine.

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More power means more gas...

Jshem746 said:

so either way ill be sacrificing mpg for a power adder. frigging gas prices r making me think twice about doing anymore mods to my car...

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or course with SC or Turbo you are going to want to use Premium fuel all the time.... with N20, I used it ONLY at the track, so i could run 87 during the week, run the tank to E and then put 94 in on the weekends...

billthecougnut said:

Neither mod should affect the milage of your vehicle when commuting/driving around town. Your gas mileage will only be affected by the urge to feel your butt pressed firmly against your seat more often. Dont worry about it. Pick the one that makes you happiest and keep your foot out of it except when you really need your FIX and you will be good as gold and the extra money on fuel will be considered an entertainment expenditure. :bigthumbsup

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that is absolutely NOT TRUE... You need to have someone with the Powerhouse Turbo take you for a ride.. there is no lag... it makes an amazing amount of torque very early...

Do you have it reversed? A centrifugal supercharger (Vortech or ProCharger) comes on slower... it continues to build boost as the RPM increase..

burnrubber4.0 said:

<snip>

a s/c picks up and goes a few sec. faster than the few more sec it takes a turbo to get spinnin

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