Ok i am looking at increaing some hp but i am not sure how to go about it and get good results for the money. i have been looking at superchargers and i am wondering if they are a good investment. i looked at the procharger and it is only 3500. has anyone put one of these on a pretty stock motor and computer and had luck with them? The top part of my motor has been built a little with a computer friendly lunati cam, no bottom end has been down to it. also no programming of the computer either. and i deas or thoughts?

 

More info needed!!! What year car? What kind of car? Yes you will need to reprogram your computer.

 

You will definately want to have some custom tuning done so you don't get any detonation. Detonation is what kills your pistons, especially the stockers. And yes, you will eventually pop the stock motor with a blower. It's not a matter of if, but when. Sorry for the cold hard facts, but there you have it.

 

The previous post is correct. While there are some exceptions, stock GM small blocks and blowers don't seem to last very long, especially LT1's. It's the pistons that are the problem, along with the high compression ratio and the poor quality fuel that is available. For a relatively small amount of money that can be corrected with a new set of pistons. The stock crank and rods are more robust than many people give them credit for. But unless you can do a lot of the work yourself, you are still talking about adding a couple of thousand dollars to the project. And a SC with stock heads and a cam doesn't make a car god-awful fast. Yes, it will add in the range of 100+rwhp. And it will be a lot faster. But in terms of bang for the buck, $5,000+ dollars for a SC and a new set of pistons really doesn't make the most sense. Heads and cam may produce a better package for less money. And for track use, stock motors seem to live fine with up to a 150hp nitrous shot. That will make you a LOT faster than a blower for a lot less money. Doesn't do much on the street, however.

Rich Krause

 

Yeah, and you don't get that cool whistle with a bottle.

 

It is a 95 lt1. i figured that that would be obvious seeing i am in the lt1 forum, but i guess i should have left more details. the nitrous scares me and i have a lot of friends that have used it and not had good results. pushing a 75 shot and only gaining 25-30 horse the the wheaes, seems like a big risk for not much gain. What kit is recomended for the lt1. i have heard bad things about zex?

 

This is the Forced Induction forum.

I've always had good results (carb applications) from NOS plate systems. I'm not sure how good their fuel injection fogger kits are cause I've never used one. You might look into the nitrous forum and see what they have to say.

BTW, what kind of cars were using those 75 shot kits?

 

My bad i posted it in lt1 they must have moved it..




Um mostly 4cyl z-24 and some imports, and i know they are a little different but a motor is a motor, and i have seen so many cars blow up from it. and a 4cyl is much cheaper to replace if u know what i mean. Ya but i will look into it, i had a friend that used the bottle on his 4.6 mustang and used it all the time and never had a problem but 2 years later he built a new motor anyways so, who knows how long it would have lasted.

 

 

NO..... 4-cyl and imports are a hell of lot different then a LT1!!!!
Also, the reason why nitrous is blowing up the 4 bangers or any other motor is that they were not designed, stock, to handle an extra boost like nitrous. A stock LT1 is more stout and can handle a 150 shot every once and awhile.

 

hey thanks for the info.

 

Yeah, the LT1 produces more torque in stock trim than an import does with the 75 shot. And a small block chevy is one of the cheapest motors to build since it's been around for 50 years.

 

Simply due to the difference in displacement, a 75hp nitrous shot will increase cylinder pressure at least 2.5X more on a 4cyl than on a 350ci motor. I am not advocating for N2O over a blower, they are two very different power adders. But in terms of bang for the buck there is no cheaper, easier way to add 100hp to an LT1 than with nitrous.

Rich Krause

 

why will it ad 2.5 times more pressure in the cylinders? because of 4 more cylinders in a v8? then it would be considered the same if i put on 150 shot

 

At a given rpm the additional cylinder pressure is a function of displacement. IOW, the same nitrous shot on a smaller motor produces the same additional hp, so the pressure pushing on the piston must be (and is) higher.

The equation bmep = Power / ( Swept Volume x revolutions per second) describes what is going on. If you inject a 150hp nitrous shot into a 2L vs. a 5.7L motor at the same rpm, there will be 2.85 (5.7/2) times tbe added cylinder pressure in the smaller motor.

Rich Krause