RX-8 into RX7
03-05-05, 08:18 AM
#1
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RX-8 into RX7
i know im going to get stupid comments for this but here it goes.
The rx8 hp is 230 right.
the rx7 hp is 255 right.
ok to the point.
If we can install some of the rx8 parts (like the LIGHTER ROTORS from the 8 into the 7, Brand new rotor housing.. or anthying else that would benefit the 13b-re into the rx7. wouldnt that help put out more horsepower or even reliability?
OK start with the bad comments.
The rx8 hp is 230 right.
the rx7 hp is 255 right.
ok to the point.
If we can install some of the rx8 parts (like the LIGHTER ROTORS from the 8 into the 7, Brand new rotor housing.. or anthying else that would benefit the 13b-re into the rx7. wouldnt that help put out more horsepower or even reliability?
OK start with the bad comments.
03-05-05, 10:35 AM
#7
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im just talking about using the lighter rotors from the rx8 into the 7. which will give the engine more horsepower. plus the rotors will be brandnew (from a brandnew engine).
the FC offered lighter rotors in 87 and racingbeat offers them also. I was just thinking that when the rebuild comes (easier to get in the engine then) it would be a benefit to have these for more power.
the FC offered lighter rotors in 87 and racingbeat offers them also. I was just thinking that when the rebuild comes (easier to get in the engine then) it would be a benefit to have these for more power.
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03-05-05, 10:49 AM
#8
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why don't you just do that? just find someone that makes racing rotors for our engines?
msp and rew are different enough that parts are probably not as interchangeable as you think. for one, the exahaust ports are on the side and that probably affected the design of the rotors as to not work in other 13b's
anyone knows why racing beat doesn't make lightened rotors for our engines?
msp and rew are different enough that parts are probably not as interchangeable as you think. for one, the exahaust ports are on the side and that probably affected the design of the rotors as to not work in other 13b's
anyone knows why racing beat doesn't make lightened rotors for our engines?
03-05-05, 11:15 AM
#11
Originally Posted by darkphantom
im just talking about using the lighter rotors from the rx8 into the 7. which will give the engine more horsepower. plus the rotors will be brandnew (from a brandnew engine).
the FC offered lighter rotors in 87 and racingbeat offers them also. I was just thinking that when the rebuild comes (easier to get in the engine then) it would be a benefit to have these for more power.
the FC offered lighter rotors in 87 and racingbeat offers them also. I was just thinking that when the rebuild comes (easier to get in the engine then) it would be a benefit to have these for more power.
They were in even lighter in '89, but they didn't change for the FD.
Lighter for the FE, but higher compression ratio.
The side housing won't work without huge modifications since they side port the exhaust, all other rotaries have peripheral exhaust ports.
03-05-05, 11:16 AM
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You're talking about two different set-ups, literally and figuratively.
Sure, they maybe the same in nature, but the housings probably won't work in an FD without a lot of custom work. The exhaust-ports are the the side.
You may be able to swap rotors and stuff, but you also need to take into consideration the fact that the 13BREW is a lower compression rotor, than the Renesis is.
As far as the two motors go they're entirely different. The 13BREW was made with a turbo-charging system in mind, and the Renesis was not.
So the answer to your question I would say is mostly "No."
Sure, they maybe the same in nature, but the housings probably won't work in an FD without a lot of custom work. The exhaust-ports are the the side.
You may be able to swap rotors and stuff, but you also need to take into consideration the fact that the 13BREW is a lower compression rotor, than the Renesis is.
As far as the two motors go they're entirely different. The 13BREW was made with a turbo-charging system in mind, and the Renesis was not.
So the answer to your question I would say is mostly "No."
03-05-05, 11:16 AM
#13
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but how much power increase you think from ligher racing rotors. bout the same hp increase as porting?
FD dave nice 7 BTW.
FD dave nice 7 BTW.
03-05-05, 12:35 PM
#14
Originally Posted by darkphantom
but how much power increase you think from ligher racing rotors. bout the same hp increase as porting?
https://www.rx7club.com/3rd-generation-specific-1993-2002-16/lightweight-rotors%3Dless-torque-379771/
03-05-05, 01:03 PM
#17
Originally Posted by darkphantom
thanks for the link mahjik. i just would thought that a lighter rotor would act like a lighter flywheel.
Yes, less load on the engine therefore less drag during the rev. Disadvantage is poor acceleration out of the hole for a launch, ie Drag racing. You need the inertia of the heavy flywheel because we lack torque, and since you don't produce much boost from a standing start, maybe 4 or 5 psi, the inertia from the flywheel spinning at high rpm helps to keep the engine from bogging out of the hole. The benefit on a road course is the flywheel is light and since you are slowing and accelerating rapidly the engine can recover the power faster if it doesn't have to work as hard to spin the flywheel to get the power to the ground!
03-05-05, 01:19 PM
#19
Originally Posted by darkphantom
there will always be something out there to make more power. we just have to search for it.
Unless you get extreme with some Bridge/Peripheral Porting, there's not a whole lot to be done to the engine (which is cost effective). If you read through the threads of people making a lot of power, rarely will you see any serious internal engine changes/modifications other than seals (maybe oil & coolant passage mods but those don't necessarily directly produce more power).
03-05-05, 10:20 PM
#21
You can put RX-8 rotors into a RX-7 but why would you ? The RX-8 rotors would have to been milled/machined to fit RX-7 apex seals cause the stock apex seal does not do well when boosted . That means more money throw to something that will does minimal power increase .
03-06-05, 12:16 AM
#22
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Originally Posted by darkphantom
there will always be something out there to make more power. we just have to search for it.
Its called supercharging, he he.
03-06-05, 03:08 AM
#24
Displacement > Boost
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Bwahahahahaha, lysholm superchargers give you the feel of the stock twins without the vacuum nightmare, heat incinerator under the hood, and charge density limitation. That's right it's about desire, and lack of suffering. Stock twins = instant power, stock twins = a whole lotta stuff to maintain and repair. Supercharger = belt driven boost with the feel of stock twins and only one vacuum line, oh yeah.
*edit* who wants exponential unpredictable power or extreme boost? Not me. If 500 hp is what I desire, I'll take the easy way there, the middle path, the LS1. All I want is a 12 second street car that gets up and moves like a cat at the drop of my foot. V8's feel great, just face it, they don't hesitate.
*edit* who wants exponential unpredictable power or extreme boost? Not me. If 500 hp is what I desire, I'll take the easy way there, the middle path, the LS1. All I want is a 12 second street car that gets up and moves like a cat at the drop of my foot. V8's feel great, just face it, they don't hesitate.
Last edited by 88IntegraLS; 03-06-05 at 03:10 AM.
03-06-05, 08:13 AM
#25
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BUT HOW MUCH BOOST COULD YOU INCREASE USING a SUPERCHARGER 
i mean i thought after you install a supercharger then thats it!
i mean i thought after you install a supercharger then thats it!