more horsepower and torque?
01-09-2007 | 01:21 AM
#1
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more horsepower and torque?
has anyone tried to do light weight fly-wheel and underdive pulley's? if so, was it worth it, did you feel the difference. if i do the flywheel i am going to also do a stage 2 clutch by competition or center force
01-09-2007 | 01:28 AM
#2
Senor Carnegrande
Joined: Jul 2003
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01-09-2007 | 01:41 AM
#3
Originally Posted by CHomeview
has anyone tried to do light weight fly-wheel and underdive pulley's? if so, was it worth it, did you feel the difference. if i do the flywheel i am going to also do a stage 2 clutch by competition or center force
read around.. you need a stage 2 clutch why..
http://www.albinoblacksheep.com/flash/posting.php
beers
01-09-2007 | 02:01 AM
#4
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cuz in the long run it will be better because my clutch already slip a little and it will save me money in labor later on when i need to get a new clutch anyways. and i also have a subaru wrx with a stage 2 clutch and love the way it grips, it just wants to go.
01-09-2007 | 02:03 AM
#5
Originally Posted by CHomeview
has anyone tried to do light weight fly-wheel and underdive pulley's? if so, was it worth it, did you feel the difference. if i do the flywheel i am going to also do a stage 2 clutch by competition or center force
OH MY GOD YOU ARE A GENIOUS!!!!
No, in the almost 4 years this car has been out no one has had the idea to do a lightweight pulley and flywheel. That must be what the community is missing. 300whp with these mods, i can feel it. If only we had thought of this sooner....
01-09-2007 | 02:05 AM
#6
Originally Posted by CHomeview
cuz in the long run it will be better because my clutch already slip a little and it will save me money in labor later on when i need to get a new clutch anyways. and i also have a subaru wrx with a stage 2 clutch and love the way it grips, it just wants to go.
I havent heard of anyone having problems with the stock clutch on this car, that actually knew what they were doing.
01-09-2007 | 02:10 AM
#7
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well i was thinking that its only a 1.3 liter and not like a v8, so i should prolly start with taking dome weight off the actual motor first. i read on this wbsite that this guy did greddy exhaust, high flow cat, light weight flywheel, and underdrive pulleys and he dyno the car 37 HP more, but he said he got a lot of torque out of it which is what i want.
01-09-2007 | 02:17 AM
#9
peterisurhero
Joined: Mar 2006
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From: cerritos, CA
Originally Posted by CHomeview
well i was thinking that its only a 1.3 liter and not like a v8, so i should prolly start with taking dome weight off the actual motor first. i read on this wbsite that this guy did greddy exhaust, high flow cat, light weight flywheel, and underdrive pulleys and he dyno the car 37 HP more, but he said he got a lot of torque out of it which is what i want.
i really doubt he got 37 hp out of that. pulleys dont give you any hp. its been proved on a dyno. highflow cat give about 8?? light weight around 8-10?? exhaust like 5?? hahaha if you want power, juss go F/I. mazsport stage II!!
01-09-2007 | 02:21 AM
#11
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what does that stage 2 have to it? i didnt mean just the pulleys at 37 HP, i meant like all that, and u might be right, for all i know its just some number this guy pulled out of no where, but it could be a ballpark. m y friend just got a light flywheel in his civic and i deffinately felt a difference in his revs.
01-09-2007 | 04:58 AM
#13
Rotary Genius...
Joined: Nov 2006
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From: TX
its not that the RX8 cant hold more than 5psi, its that the fuel injectors and the fuel pump can only hold till around 300 hps which is aproximetly 5 to 7 psi, if running more than that the car would run dry. but to fix that ypu would have to install a fuel pump and regulator, that would do the trick, ahhh it depends on the size of the turbo 2 if its a little turbo dont expect to run more than 7psi.
01-09-2007 | 06:52 AM
#14
It depends on which turbo a person is running as well since a larger turbo can push a larger volume of air at a lower psi. 
Keep in mind that not all underdrive pulleys are equal.
Swapping out the clutch while you are in there is a good idea if you are going to forced induction in the future. Otherwise the stock clutch is sufficient.
Keep in mind that not all underdrive pulleys are equal.
Swapping out the clutch while you are in there is a good idea if you are going to forced induction in the future. Otherwise the stock clutch is sufficient.
01-09-2007 | 10:43 AM
#15
RotoRocks Powered
Joined: May 2006
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From: Delray Beach, FL
Originally Posted by 4 years to Supercharge
It depends on which turbo a person is running as well since a larger turbo can push a larger volume of air at a lower psi.
.
.
No it cant. No matter how big a turbo you have, in order to push more air through the intake ports you need to raise the pressure.
The difference is that larger turbo can simply flow more air (maintain the set pressure easily, and not over-spin at high RPM)
01-09-2007 | 11:21 AM
#16
Originally Posted by rotorocks
Ah?? What?
No it cant. No matter how big a turbo you have, in order to push more air through the intake ports you need to raise the pressure.
The difference is that larger turbo can simply flow more air (maintain the set pressure easily, and not over-spin at high RPM)
No it cant. No matter how big a turbo you have, in order to push more air through the intake ports you need to raise the pressure.
The difference is that larger turbo can simply flow more air (maintain the set pressure easily, and not over-spin at high RPM)
01-09-2007 | 11:28 AM
#17
This should clear any confusion:
First of all let's clear it all u by ditching CFM. Replace it with "MASS". This will the gas by it's weight. Next lets get the molecule thing over with because this in itself tells you why you have pressure period.
The mols themselves stay the same size, they just speed up and slow down. If the get hot they speed up therefore hitting each other and the container around them with greater force. Thus more pressure. Colder is the oposite.
They tell us that if there was no heat at all meaning absolute zero the moles would be still. Then sound would not travel at all. Therefore the moles are traveling at the speed of sound. Gets clearer now right?
The analagy about the flow and pressure doesn't work right either as the pressure you see at the turbo is the same as you see in the manifold once they are conected. If it takes x psi to put y mass into a given engine at z temp then that is that. You can adjust these things around the efficeincy and particulars of the installation but fact is fact.
So that's why you are right and wrong. Sure a given compressor map shows xxx compressor flows 400 cfm at zz psi you can't just say my engine will make more power with that comp then with one that flows less with that psi.
You are already starting with the biggest compressor in the world. Said comp will put unlimited cfm into your engine at 14.7 psi. Guess what? it already does, it's Mother Nature. You can't get a more eff comp with more capacity. It's the best and the biggest. If the engine would take more mass just because the compressor can produce it then the first engine would be using it all and we would all be sucked into said engine with it.
An engine will take so much more depending the resistence of itself. The only way to get more mass with the same pressure is to have it cooler. The only way to get it coller is better efficeincy. Remember anything that gets hot used energy to get there.
Now for some lab work. We have here a box that has around it a water jacket. There is a pressure gauge and temp gauge in the chamber. First we clamp the lid on and there is zero psi by gauge. We now pressurize the chamber to 10 psi while filling the jacket with crushed ice. So there is 10 psi at 32f. Next boil the ice at 212f and we have without opening or changing a thing 19 psi. BUT THE SAME MASS IS IN THERE.
Next fixture has a chamber that can vary in size with say a piston sliding in it. We again start with the ice filled jacket and find 10 cu ft in the chamber. with a given pressure of say 1psi. Boil the ice to 212f and in order to keep the same 1psi the piston must slide out to develop 13.6 cu ft in the chamber.
THE SAME MASS IS IN THERE.
It's all down to that little mole. There is no free lunch. A good install is a lot of work. You must understand the science first, then be a good fabricator. My best advice to most of you is to buy a well engineered kit and tune it like it should be then leave it alone. Beware, there are a lot of people building kits that don't have all the resorces that they should have. I don't mean facilities, I mean brain trust.
On the other hand there are a lot of homemade one off installs that work just fine.
Moral of the story is to know as much as you can before you buy. Take advantage of other peoples screw ups. Don't believe everthing you read in ads. For that matter read between the lines of magazine reports.
Originally Posted by Richard Paul
First of all let's clear it all u by ditching CFM. Replace it with "MASS". This will the gas by it's weight. Next lets get the molecule thing over with because this in itself tells you why you have pressure period.
The mols themselves stay the same size, they just speed up and slow down. If the get hot they speed up therefore hitting each other and the container around them with greater force. Thus more pressure. Colder is the oposite.
They tell us that if there was no heat at all meaning absolute zero the moles would be still. Then sound would not travel at all. Therefore the moles are traveling at the speed of sound. Gets clearer now right?
The analagy about the flow and pressure doesn't work right either as the pressure you see at the turbo is the same as you see in the manifold once they are conected. If it takes x psi to put y mass into a given engine at z temp then that is that. You can adjust these things around the efficeincy and particulars of the installation but fact is fact.
So that's why you are right and wrong. Sure a given compressor map shows xxx compressor flows 400 cfm at zz psi you can't just say my engine will make more power with that comp then with one that flows less with that psi.
You are already starting with the biggest compressor in the world. Said comp will put unlimited cfm into your engine at 14.7 psi. Guess what? it already does, it's Mother Nature. You can't get a more eff comp with more capacity. It's the best and the biggest. If the engine would take more mass just because the compressor can produce it then the first engine would be using it all and we would all be sucked into said engine with it.
An engine will take so much more depending the resistence of itself. The only way to get more mass with the same pressure is to have it cooler. The only way to get it coller is better efficeincy. Remember anything that gets hot used energy to get there.
Now for some lab work. We have here a box that has around it a water jacket. There is a pressure gauge and temp gauge in the chamber. First we clamp the lid on and there is zero psi by gauge. We now pressurize the chamber to 10 psi while filling the jacket with crushed ice. So there is 10 psi at 32f. Next boil the ice at 212f and we have without opening or changing a thing 19 psi. BUT THE SAME MASS IS IN THERE.
Next fixture has a chamber that can vary in size with say a piston sliding in it. We again start with the ice filled jacket and find 10 cu ft in the chamber. with a given pressure of say 1psi. Boil the ice to 212f and in order to keep the same 1psi the piston must slide out to develop 13.6 cu ft in the chamber.
THE SAME MASS IS IN THERE.
It's all down to that little mole. There is no free lunch. A good install is a lot of work. You must understand the science first, then be a good fabricator. My best advice to most of you is to buy a well engineered kit and tune it like it should be then leave it alone. Beware, there are a lot of people building kits that don't have all the resorces that they should have. I don't mean facilities, I mean brain trust.
On the other hand there are a lot of homemade one off installs that work just fine.
Moral of the story is to know as much as you can before you buy. Take advantage of other peoples screw ups. Don't believe everthing you read in ads. For that matter read between the lines of magazine reports.
01-09-2007 | 02:28 PM
#18
RotoRocks Powered
Joined: May 2006
Posts: 1,236
Likes: 6
From: Delray Beach, FL
Originally Posted by 4 years to Supercharge
Not if the smaller turbo restricts the exhaust and heats the air up more.
"An engine will take so much more depending the resistence of itself. The only way to get more mass with the same pressure is to have it cooler. The only way to get it coller is better efficeincy. Remember anything that gets hot used energy to get there." ^^
01-10-2007 | 08:30 PM
#19
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hey acclaim, which turbo did u end up doing to push 10 lbs. i didnt know about the fuel pump and injectors and all that. the main problem i have heard is that some seal around the rotor or something like that cant hold all the pressure. i dont know if thats true or not, but this guy that i ran into had an rx7 2nd gen.
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