Your Car.....

[DeeezNuuuts83]

i remeber someone stating earlier that supras were bulletproof...so ar e we looking at 50 psi outta this?? or would more work need to be put into it?

We might call it bulletproof, but everything has its limit. Although a Supra motor can handle a lot, 50 psi might be pushing it a bit too far.

is it also possible to have a supercharger and a twin turbo in a car?? each with maxed out, or close to, psi....around 20 each, so 60?? or would the car blow up?? i heard these were inefficient..

Anything is possible, but no one has really experimented with that with success. The first production engine combining both a supercharger and a turbocharger was successfully completed by Volkswaken, which they call a "Twincharger," can be seen here:
http://www.autozine.org/technical_school/engine/tech_engine_3.htm#Twincharger
In this particular setup, they applied both to a 1.4-liter inline-4, putting out 170 hp and 177 lb.-ft. While these numbers might not be astonishing on a forum where we commonly talk about cars putting out 300+ hp, keep in mind the tiny engine and how incredibly efficient it is. It uses a tiny engine as a starting point, adds a supercharger to give it a lot of low-end punch and a turbocharger to give it a strong top-end, producing as much power as a significantly larger engine while still using less fuel. What they have started is a wave of new smaller engines that use both types of forced induction that utilize each's strengths to counter each other's weaknesses. Wait a few years and see what happens when this technology is applied to bigger engines and geared for high performance.

 

[tennis_dog]

all right...from what i've been told, superchargers give boost from the get go....its instantaneous...and turbos really need a little time...3000 rpm atleast, to build up exhaust and therefore have that "lag"

but now from what you just said, im thinking that superchargers kick in in the lower rpms (low end) and turbos kick in in the higher rpms (high end).....so superchargers are not continuous boost, just for the first 4,000 or so rpm??

and are inlines more powerful than V's?? i mean...there is no v4 or any even number to compare an inline and a V, but are inline 4's as powerful as a v6?

 

[Duke]

all right...from what i've been told, superchargers give boost from the get go....its instantaneous...and turbos really need a little time...3000 rpm atleast, to build up exhaust and therefore have that "lag"

but now from what you just said, im thinking that superchargers kick in in the lower rpms (low end) and turbos kick in in the higher rpms (high end).....so superchargers are not continuous boost, just for the first 4,000 or so rpm??

and are inlines more powerful than V's?? i mean...there is no v4 or any even number to compare an inline and a V, but are inline 4's as powerful as a v6?

All depends of course. There's no rule of thumb that dictates power based on engine setup. The setup is usually for practical reasons. Inlines are long and thin, which tends to be space efficient. Add more cylindres, though, and you're running out of space. Hence that practically all 8 pots are in the V-setup and that everything under 8 pots can be in any setup (although you wont find V-engines with a small amount of cylindres.


On superchargers vs. turbos, superchargers get their compression power straight from the driveline. They have a linear power increase. Turbo's need a specific RMP to get spinning smoothly (depends on turbo, engine, set up, etc how high that RPM is) before the boost really gets going. It's power increase is not linear.

In laymen's terms (using made up figures) a typical supercharger wont produce that much more extra power @ 5500 rpm than @ 4500 rpm, while a typical turbo is blowing a lot harder @ 5500 than @ 4500.

 

[tennis_dog]

ah ok...yeah, i also scrolled a little further up on that site taht deez had linked us to.....that really helped...so superchargers really have a limit as to how much power they can produce, where as with a turbo, you throw in a bigger fan, and you got more power, along with a lotta turbo lag depending on how big the fan is...

so porsche was a pioneer with all this turbo stuff??? having the fan electronically spin while the car was idle??? i always wondered if there was a way to do that...i thought that's kinda how electronic super and turbo chargers work...

 

[DeeezNuuuts83]

so superchargers really have a limit as to how much power they can produce, where as with a turbo, you throw in a bigger fan, and you got more power, along with a lotta turbo lag depending on how big the fan is...

Not necessarily the fan size, more so the size of the actual turbo itself, which is the fan as well as the housing.

so porsche was a pioneer with all this turbo stuff??? having the fan electronically spin while the car was idle??? i always wondered if there was a way to do that...i thought that's kinda how electronic super and turbo chargers work...

I think you might've misinterpreted some of that information, there is nothing about having the fan electronically spin. The part under "Porsche's solution to turbo lag" (which is what I think you were referring to) says that the turbo win spin more quickly through some parts that allowed air to recirculate, not necessarily using any electronic aids.

 

[tennis_dog]

hmm..still not getting that..but...

silly question but..if the exhaust is being reused to be pumped back into the engine...when does it finally come out the exhaust pipe?

and my next post, i promise..will be of my car...cuz that's what this thread was about in the first place, and 86 posts later, it still isnt up

 

[tennis_dog]

they looked fine on the cam, but as i look at them on the comp, some flash wouldnt have hurt...if its that bad, i'll go out and take them again...its just kinda hot outside right now...

but here they are in a .rar file, cuz uploading them through imageshack woulda been a bitch..how can pictures be 16 megabytes?? they're like 2 megs each...anyways...lemme know how shitty the car is, and then my camerawork...

http://www.megaupload.com/?d=7911I6NE


there are some close up shots of the front of the car...i think i scraped it against something, or it happened during the winter when i mighta had it hit a pile of snow...just let me know if that can be fixed..its a slight bend in the lower grill




EDIT: Fixed link.

 

[DeeezNuuuts83]

silly question but..if the exhaust is being reused to be pumped back into the engine...when does it finally come out the exhaust pipe?

The exhaust gas isn't really pumped back into the engine. In a normal car, the engine has headers that direct exhaust gas to the catalytic converter where it is made less toxic and then routed out through the exhaust pipes and out into the atmosphere. A turbo kit goes where the headers normally go. What is different is that there is a much shorter set of headers that feeds exhaust gas into the turbo, which propels the turbine (or the "fan" as some people call it). When it goes into the fan, it gets directed through the turbo housing then out through the catalytic converter(s). On the other side of the turbine is another one that spins at the same time, but this one sucks in fresh air through the air intake, which is connected to it. The intake air (not exhaust gas) that gets sucked in is routed through the intercooler then back into the intake manifold, then into the combustion chambers, then it becomes exhaust gas and the whole process repeats.

 

[tennis_dog]

oh ok....and this catylictic converter....im sure that's part of the reason why a car would fail an emission test right??? are there parts that can just naturally reduce the emission's toxicity, such as a better converter?

also, you take a look at the pics? it's 17 megs, i know, but just take a peek...

 

[DeeezNuuuts83]

oh ok....and this catylictic converter....im sure that's part of the reason why a car would fail an emission test right??? are there parts that can just naturally reduce the emission's toxicity, such as a better converter?

The catalytic converter, in most cases, is the reason why your car PASSES an emission test. However, in recent years, there has been a lot more "green technology" applied to car engines that makes them much cleaner, plus a couple cars don't even need a catalytic converter. High-performance engines, on the other hand, can have two or three since they are so high strung and made for maximum performance. However, some cars use high-flow cats (that are still quite effective but allow strong power gains due to less restrictive back pressure) or use race pipes (which are just straight pipes without any thing in them but aren't effective in terms of making the exhaust gas less harmful but allow huge gains). However, both of these are illegal in most states since tampering with the catalytic converter (unless it really needs replacement or has reached a certain mileage) is against the law; some states like California even require the replacement to be a completely stock one whereas some other states will allow an aftermarket one, as long as it still does the job.

 

[Jump Off]

Some of these questions had me rolling. But I'm glad you are understanding now. Props to everyone who is answering them, good answers so far.

 

[tennis_dog]

anyone dl the pics to tell me they were shitty? cuz i should them to someone else and they said they couldnt see a whole lot...so one dl and let me know so i can take em again...i need that fucking under-grill thingy fixed...

 

[DeeezNuuuts83]

anyone dl the pics to tell me they were shitty? cuz i should them to someone else and they said they couldnt see a whole lot...so one dl and let me know so i can take em again...i need that fucking under-grill thingy fixed...

Why don't you downsize your pics and upload them onto www.imageshack.us then link them here? It'd be a lot easier, I seriously doubt more than 2 people on this board bothered to download your pics.

 

[tennis_dog]

i tried uploading them, but they were too big...

does shrinking them in paint actually change the size?

 

[DeeezNuuuts83]

Paint is one of the worst programs you could possibly use. Try some other program. I don't know what you have, but right-click on the file, go to "open file with" and pick one of the suggested programs. One of them is bound to have a feature where you can downsize pictures.