SKILMATIC
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scottyz said:I'm thinking of efficiency in terms of a turbo being driven by exhaust gas.
O ok. Yes in terms of mixing exhaust gases with the intake charge it is very efficient. But thats the only thing the turbo is more efficient at.
Well guys, he has a 1997 Honda Civic. I Think, I know it's a Honda. I know I'm gonna have to do the bulk of the work, I'll probably charge him, because I have to work on cars at work, I really don't want to do it in my spare time. I already know the basics of how these things operate. But unfortunately, there usually not contained in OEM vehicles, as their quite expensive, so I would think that they raise the sticker price, so I don't have the chance on working on many of them.
What trim is it? The reason I ask is becasue if you have the EX, LX, or SI that motor is already equipped with v-tec. If its not then it is a non v-tec motor. However, if you are going to do any FI application to a civic. I would highly recommend doing at least a head swap to a GSR or a typeR head. Reason why is the head flow and cams are more turbo friendly than any other heads for civics. However, to get the most power you could use the following motors: B18, B20, F22, H22, even the K20. I know alot about civics as I used to work on many of them in the dawn of the tuner era becasue everyone in the mother had a civic.
Really? I thought blowers usually produce more boost pressure at low speeds than turbochargers. But, a supercharger uses engine power to make the boost, so dosen't it put more stress on the internal parts? I don't think he wants to race it,per sae, he's young, around 21, so, you know how these kids like their cars. No offense Skilly. Uniwiper, rims, etc.
Blowers, like I said before are more efficient and hold hp throughout the entier rpm's. However, it only is limitied to the type of pulley you put on the car. Becasue all blowers are pulley(or belt) driven the only way to negate boost in a supercharger is to change the size of the pulley. The smaller the pulley the higher the boost. Usually a supercharger can only peak to about 20psi. And thats pushing your motor. If going over 15psi on a blower I would rewcommend a full motor rebuild to forged goodies.
On the other hand, a turbo(altough succumbed to lag) the boost is insurmountable. You can negate the boost 2 different ways. Through a mechanical boost controller or a electronical boost controller(best way to go). The best boost contrioller IMO is the Profec EO1. I use it and its just beautiful. I have tried almost 7 different others and mine is the best one by far. Now on turbos it is exhaust driven which ca mean tons and tons of power. On a civic bottom end if exeeding over 14psi on the stock block I would do either a motor swap of swaping to forged goodies. Now if you were to get a B18 you wouldnt need to do either casue the block is actually built to handle 20psi on the stock block and head. I know becasue I use to own a B18 SI '98. Also I thought you were my age? How old are you? And I am by no definition the average kid. You should see my cars. I do them right.
Yea, that's what I thought. I know superchargers usually act more like fans, hence the name blowers. Isn't turbo lag the time period between the boost and no boost periods? I know a turbo is operated by exaust gasses, so I guess the amount of boost depends on the engines speed? I would think a turbocharger is more effiecient.
Both act like fans. If you look at them they both have fans. However, the difference lies how they are driven and manipulated. I know the efficiency becasue I tune my dads blown 05 GT mustang. He was the first to have a blown 05 GT and we are making break throughs. I can tell you through pure experience and from tuning both applications that superchargers are much more effieceint in every aspect(except mixing the exhaust gases) than turbos. Now boost is negated through boost controllers and rpm's. Engines speed doesnt really have anything to do with boost other than the rpm's. I can get more boost in 2nd gear going 80 @ 7800rpm's than going 100 in 4th gear @ 3000 rpm's.
I haven't really discussed with him his budget, I'm pretty sure of his expectations though, I think he just wants a fast car,and wants it too look pretty. Yea, I can write pages of pages on this subject too.
Well he needs to lay down a budget for his project. Fast is a definition that varies amongst many. It is purely self perception. What I may think is slow your friend may think its fast. I would recommend a good motor setup with a turbo kit that is making around 300hp. In my expreience I made that with my civic and it costed me about 3500. Maybe a little less. And with that setup you can put the beat on any stock V8 vehicle in a quarter mile. You can also beat many semi built 4bangers.