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-   -   6.97@197mph Sporty Motorsports 13B RX7 (https://www.rx7club.com/rotary-drag-racing-167/6-97%40197mph-sporty-motorsports-13b-rx7-710623/)

RXHEAVEN_WA 11-18-08 06:42 PM

:lol:

13B-RX3 11-18-08 06:52 PM


Originally Posted by crispeed (Post 8731687)
You have a PM!


:dunno:

Gorilla RE 11-18-08 07:08 PM


Originally Posted by auricomXL (Post 8731194)
So what makes it beneficial to do so much compression of the fluid (air) using a rotodynamic pump, and so little with the positive displacement pump? When you say "Low!" I am guessing somewhere around 7.5:1? And they are running something like 50 psi boost, right?

So that’s a pressure ratio of 3.3:1 as the fluid passes the compressor, then exchanging heat with the intercooler, then pressurizing an additional 7.5:1, making the total compression ratio with respect to atmospheric 25:1 (7.5*3.3=25). Why not just run 12.5:1 compression ratio rotors (if they existed) and a boost pressure of 15psi (PR=2:1). Your air charge would still be 25:1 (12.5*2=25). Or for that matter why not run 25:1 compression ratio rotors with no turbocharger at all. You would no longer build up the total pressure ratio progressively as you wait for the turbo to spool up.

I think I know the answer to these questions, and I think it has to do with adiabatic efficiencies and PV=mRT and the act of INTER-cooling, but I would like to hear other peoples answers.

Also, does anyone know what type of transmission Sporty is using? What engine series?

Are you for real?? How sure are you about your mathematics and theory? I'll bet you're not sure enough to build it. And I bet you're not sure enough to build it and then compete in the same series that sporty races..... Why? Because you wouldn't be competitve....at all. You're missing a few big things in your thinking......oh but I'm sure you knew that and you just wanted to see what everyone else had to say huh?

-J

mannyvidal 11-18-08 07:17 PM


Originally Posted by 13B-RX3 (Post 8731736)
:dunno:

^^^^^ after reading all the other nonsense i feel smart again :Wconfused i think :lol: but hey thanks for nothings you sexual bastards and yes allen agree drifting is for homos :lol: drifters are frustrated dragracers that cant keept their car goin straight :icon_no2:

crispeed 11-18-08 09:10 PM


Originally Posted by 13B-RX3 (Post 8731736)
:dunno:

Cunt
It was meant to be funny in reply to the below statement.

''I am sure a few contributors in the threads that you hold dear will PM you ''

mannyvidal 11-18-08 09:13 PM


Originally Posted by crispeed (Post 8732202)
Cunt
It was meant to be funny in reply to the below statement.

''I am sure a few contributors in the threads that you hold dear will PM you ''

:rlaugh: :rlaugh: :rlaugh: TUNA called you a stinky hay filled cunt :rlaugh: :rlaugh:

13B-RX3 11-18-08 09:25 PM

So you want to know how to please a man too Chris :lol: :lol: :lol:



Originally Posted by mannyvidal (Post 8732209)
TUNA called you a stinky hay filled cunt


:hahaha: :hahaha: :hahaha:

RoTaRyBoYz 11-18-08 09:37 PM


Originally Posted by mannyvidal (Post 8732209)
:rlaugh: :rlaugh: :rlaugh: TUNA called you a stinky hay filled cunt :rlaugh: :rlaugh:

Even I understood what the word "PM" was implying :icon_no2:

There i thought "W" was the only slow Taxan...looks like i'm wrong :rlaugh:

13B-RX3 11-18-08 09:40 PM


Originally Posted by RoTaRyBoYz (Post 8732278)
Even I understood what the word "PM" was implying :icon_no2:


It was wishful thinking :crying: I was hoping for some good news.

crispeed 11-18-08 09:43 PM


Originally Posted by 13B-RX3 (Post 8732242)
So you want to know how to please a man too Chris :lol: :lol: :lol:

:hahaha: :hahaha: :hahaha:

That's easy when you're the 'Mother' of all 'Cunts"

:hahaha: :hahaha: :hahaha:

crispeed 11-18-08 09:44 PM


Originally Posted by 13B-RX3 (Post 8732295)
It was wishful thinking :crying: I was hoping for some good news.

Don't worry.
Me and Edgar had a long talk about you today! :)

13B-RX3 11-18-08 09:48 PM


Originally Posted by crispeed (Post 8732308)
Don't worry.
Me and Edgar had a long talk about you today! :)


Uh oh, am i going to have to stay after class :scratch:

crispeed 11-18-08 10:00 PM


Originally Posted by 13B-RX3 (Post 8732322)
Uh oh, am i going to have to stay after class :scratch:

Much more severe than that. :)

RoTaRyBoYz 11-18-08 10:13 PM


Originally Posted by 13B-RX3 (Post 8732295)
It was wishful thinking :crying: I was hoping for some good news.

Haven't i taught you anything? Patents young one :rlaugh:

U just got your good news :rock:

ultimatejay 11-18-08 10:16 PM


Originally Posted by RoTaRyBoYz (Post 8732383)
Haven't i taught you anything? Patents young one :rlaugh:

U just got your good news :rock:

Hey thread bashers, take it to the pitwall you bunch of homo's. :)

13B-RX3 11-18-08 10:19 PM

Oh shit, i thought this was the pit wall

mannyvidal 11-18-08 10:39 PM


Originally Posted by 13B-RX3 (Post 8732399)
Oh shit, i thought this was the pit wall

its getting better :facepalm:

Originally Posted by crispeed (Post 8732305)
That's easy when you're the 'Mother' of all 'Cunts"

:hahaha: :hahaha: :hahaha:

mama cunt :jump:

mad20b 11-18-08 11:17 PM


Originally Posted by RXHEAVEN_WA (Post 8731556)
Lower comp = less power all other variables being the same.

These people are only glorified mechanics so you cant expect them to know what they are talking about :lol: let alone explain it to you :lol:

I literally laughed my arse off when someone said it has "more volume and hence will make more power" :hahaha: :lol: :lol: :lol: Does anyone know why the 13B is rated at 654cc? regardless of compression ratio? smart people do, none of them are into drag racing or make products for it :lol:

It does sound like pete! Except he would have said a 13b is rated at 2600cc... LOL

Anyway... You get your rotor & lower the compression (by removing material from the rotor face) & do a before & after with your grains of salt or whatever you are using to see how much more air & fuel you can now cram into that chamber you have now enlarged in the rotor face (even more under pressure).

You have taken material out out of the rotor face & Air Fuel mixture will now fill that gap!

Sorry - but thats about as simple as I can get it for you keyboard warriers!! LOL

neit_jnf 11-18-08 11:56 PM

-in any otto cycle engine, rotary included, the compression is considered adiabatic, meaning no heat exchanged from the gas/air mixture to the surroundings so by the gas equation of state (gas law) since the volume is reduced both temperature and pressure increase.

-the higher the static compression ratio, the higher the temperature and pressure of the mixture at the end of compression

-an external compression device (turbo/sc) followed by an intercooler takes a lot of the heat out of the compressed mixture

-this allows a lower compression engine to achieve the same final compression but at lower temperatures and pressures compared to the higher compression engine

-lower temps and pressures make tuning better/easier (reduce detonation)

makes sense?

blitzboy 11-19-08 03:44 AM

^^^^^ correct :D,
as to the previous posts on this thread, you guys are funny laughed me arse off or should that be cunt ahahahahahah

RXHEAVEN_WA 11-19-08 04:13 AM


Originally Posted by mad20b (Post 8732563)
It does sound like pete! Except he would have said a 13b is rated at 2600cc... LOL

Anyway... You get your rotor & lower the compression (by removing material from the rotor face) & do a before & after with your grains of salt or whatever you are using to see how much more air & fuel you can now cram into that chamber you have now enlarged in the rotor face (even more under pressure).

You have taken material out out of the rotor face & Air Fuel mixture will now fill that gap!

Sorry - but thats about as simple as I can get it for you keyboard warriers!! LOL

:squint: :wallbash: :rofl:

auricomXL 11-19-08 11:47 AM


Originally Posted by internal comsucktion engi (Post 8731778)
Are you for real?? How sure are you about your mathematics and theory? I'll bet you're not sure enough to build it. And I bet you're not sure enough to build it and then compete in the same series that sporty races..... Why? Because you wouldn't be competitve....at all. You're missing a few big things in your thinking......oh but I'm sure you knew that and you just wanted to see what everyone else had to say huh?

-J

"How sure are you about your math theory?"
The only math “theory” I went into was multiplying compression ratios, and I'm pretty sure my multiplication is correct. I also mentioned the equation PV=mRT, which is in fact a real equation many people would recognize.

"you're not sure enough to build it"
Build what, my hypothetical 25:1 compression ratio engine? No I don't currently have the tooling to build those rotors, nor would I want to. Although I’m still not clear about what I am supposed to be “sure enough” of.

"...then compete in the same series..."
I didn't mention anything about competition.

Regarding the remainder of your post after that point...

Do you talk to people in real life like this? :icon_tup:

Gorilla RE 11-19-08 07:31 PM


Originally Posted by auricomXL (Post 8733529)
"How sure are you about your math theory?"
The only math “theory” I went into was multiplying compression ratios, and I'm pretty sure my multiplication is correct. I also mentioned the equation PV=mRT, which is in fact a real equation many people would recognize.

"you're not sure enough to build it"
Build what, my hypothetical 25:1 compression ratio engine? No I don't currently have the tooling to build those rotors, nor would I want to. Although I’m still not clear about what I am supposed to be “sure enough” of.

"...then compete in the same series..."
I didn't mention anything about competition.

Regarding the remainder of your post after that point...

Do you talk to people in real life like this? :icon_tup:

If you are going to quote me please quote me correctly.... I said: "mathematics *AND* theory". Don't get it twisted bud, I know what equations you did.

My point is, the reason you wouldn't build it "nor would you want to" is that it's pointless to do so and be competitive on sportys level.

The reason I compared the two engines and being competitive is because YOU said you don't see the point in running all that boost when all you have to do is raise the compression ratio of the rotors and you'll get the same resualt. And I'm telling you you're wrong.

This isn't "real life"? Huh....strange...I'm pretty sure I'm sitting here at my REAL shop sitting at my REAL desk typing this on my REAL laptop.

-J

RXHEAVEN_WA 11-19-08 07:52 PM

Imagine the "Displacement" on 2:1 compression ratio :icon_tup:

^ More CC's yo ! :rofl: :rofl: :rofl: :rofl: :rofl: :rofl: :rofl: :rofl: :rofl:

*dumb arse*

You know that for the retarded there is Internetz yo! and you can make up for your lack of formal qualifications by reading what some geek has copied and pasted from actual people with qualifications and brains :lol:

Reducing compression ratio dose not increase performance due to "increased volume" yo! only a total fucking retarded cunt with no education would type that shit, let alone say it to anyone who has a basic education or understanding of mechanical engineering.

ultimatejay 11-19-08 10:50 PM

^ Yeah, it's Pete alright. I recognize that foul mouth of his anywhere.:lol: :lol:


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