well hey im bout to drop 9 grand when i graudate and so far i found a full turbo kit for 5k and i am gettin my engine rebuilt and performance pistons, cams, pulleys, and etc...wut brands should i do
heres the turbo kit... http://www.vqpower.com/v2/article3.html look at the dyno picture

 

5 Grand seems like a lot for a turbo kit - I thought guys were putting kits together for like 3-4K, this is gonna be insane when its done though...although if I had 9g's i dont think it would be poured into my maxima.

 

well did u look at the dyno sheet at ony 4 psi..?but with the rest of the stuff i am prob getti.how much horses u think i will be running?...

 

You can't compare apples to oranges.

If your doing.. "engine rebuilt and performance pistons, cams, pulleys".. then your dyno will not be the same. I am guessing your lowering the compression of your motor???

And your asking several different questions at once.

So are you asking about the turbo kit? Or the cams and such?

 

im askin how much yall thik i will have after adding the turbo,pulleys,pistons, and cams...but i guess it depends on wut kind i get...but i think im definately getting that turbo

 

i didnt look at the kit you posted but whatever kit you get, if you spend the rest on internals like you say you are then by getting appropriate rods/pistons to lower the compression, all fuel related items, management, and whatever else you may choose to do you could easily get more than anyone has ever gotten if done right. considering hal got over 500 to the wheels with nitrous on stock internals, and many people are getting over 400 to the wheels on stock internals without nitrous - you should see over 600 to the wheels easy if tuned right and built correctly. by strengthening the internals and lowering the compression, you will be able to run far more boost than anyone has done thus far which puts you in unchartered territory. truthfully, anything is possible since no one has done it. a good estimate though would be 600 whp if you use that money wisely. of course, dont think that it is a matter of selecting some parts and paying someone to put them in - its more complicated than that.

 

how all would i lower the compression...sorry...i dont know everything bout cars yet...

 

you generally lower the compression by increasing the displacement which is done by getting thinner pistons and/or shorter rods.

 

OMG. And you want to boost your car?

 

10 chars

 

come again?

 

he confused as well am I because I've never heard of lowering compression that way...at least not "generally" as you stated

 

how else would you propose to do it then? the compression ratio is a measurment which is calculated by cylinder volume when the piston is at bdc vs cylinder volume when the piston is at tdc. by moving tdc further from the deck you will have increased the volume at tdc and thus creating a lower compression ratio. increasing the distance from tdc can be acheived by getting thinner pistons, decreasing the stroke with shorter rods, getting a thicker head gasket, or a combination or them all. of course there are other ways but these are the cheapest and easiest ways to decrease compression. again, the further from the deck you move the piston - all other variables constant - the lower your comperssion becomes. increasing overall displacement of the engine via pistons, rods, headgaskets, or boring out cylinder walls will also decrease compression given nothing else is changed.

edit: erased a sentance that made no sense.

 

If you increase displacement, then you will increase compression ratio, by your own reasoning.

Shortening the connecting rods or "thinning the piston" decreases CR but does nothing to displacement. Displacement is strictly bore X stroke, and stroke is determined solely by the crankshaft.

PS - I accidentally edited your last post instead of quoting it. I restored it to what I think was its original form, my apologies if I changed it.

 

how is that? the last sentace i typed read "increasing overall displacement of the engine via pistons, rods, headgaskets, or boring out cylinder walls will also decrease compression given nothing else is changed." - that clearly says increasing displacement reduces compression.

this is false. thinner pistons will increase displacement and decrease compression while thicker pistons will decrease displacement and increase compression. you can also have pistons with dishes or domes which will also effect the displacement and cr of the motor without changing the thickness of the piston itself.

stroke is not determined solely by the crankshaft and can easily be adjusted by changing the length of the connecting rod. by changing the stroke you will change the displacement as well (like you said, bore x stroke is displacement).

 

You are wrong, my friend. I suggest you do some reading.

 

You correctly stated that the compression ratio is dependent on the ratio of the bore X stroke displacement (I'll just say displacement from here) and the residual volume in the head.

If you reduce the head volume, keeping the displacement the same, then it is clear that the CR will increase. For example, 10/2 < 10/1. Here the numerator is displacement and the denominator is head volume. We decrease the denominator (head volume) from 2 to 1 in this example, and the ratio (which represents the compression ratio) becomes larger.

Conversely, if you increase the displacement, keeping the head volume the same, the CR will also increase. Using the numerical example, 9/1 < 10/1.

Headgaskets, pistons and rods will not change the engine displacement, at least what is universally accepted to be the definition of engine displacement. All these things change only the residual volume in the combustion chamber at TDC.

Boring the cylinders will change displacement, as will increasing the throw of the crankshaft.

 

If you want to dump 9 grand into a car you need to do one of two things:

1) READ, READ, and READ some more. Learn everything you can about your car and the principles behind what you are about to invest so much time and money into. I would love to see a 600whp maxima but it is not going to happen by someone who just says "I have lots of money, what do I do with it." With a civic or a domestic, yeah you could probably buy a few things and make your car really really fast but with a maxima you need to know what you are doing and be able to get the custom parts to do so. Look around on this website, especially in here, ask questions but read first. Also look into general turbo information and building engines.

2) Find someone who you trust with thousands of your dollars and your car who has done the above and is capable of making your car extremely fast. A lot of people do this. But they often time break stuff quickly, and are not capable of maintaining a car such as that.

I would personally do the first one. I like to know what I am getting into and would prefer if I cannot do it myself, at least know what they are doing. If I had such money I doubt that I would immediately go and buy some turbo and built engine parts despite looking on here thoroughly for some time now, because honestly I don't have the knowledge or the time to deal with such a feat right now assuming I had the money.

Sigh, at least he didn't ask about twin turbo.

 

ok, i agree. i didnt know that there was a diffrence between combustion chamber volume and cylinder displacement. i just considered them to be the same. so i take it we agree - same concept, just differences in terminology?

 

...

 

Are you saying there is a twin turbo for maximas? j/k