RX7 vs. MSP

What I was going to say: "Like I said I would, I retract my statement. But just to let you know, I've worked on about 8 FD's and countless FC's, I've dealt with every minor and major issue they've had and helped several people tune their cars. I've, almost always, seen the hp/torque numbers withen about 5% or each other, except on a few FC's(including mine) where the HP is about 14% greater then the torque numbers.

I'd almost be willing to say that you've got a problem with your 2nd turbo. That HP number should be WAYYY higher, even stock.

Like I said, the stock computer is NOT capable of that unless you already have a piggy-back or Power FC...something your not telling us?"

Now what I'm going to say: That dyno chart is REALLY ****** up and it is A)Either not for your car or B) Someone is ******* with the data.

First, thing that sticks out is that your hp/torque lines DO NOT CROSS at 5252rpms. That is the laws of physics, YOU CANNOT CHANGE THAT. Here's why: horsepower is a deriviative of torque. Here the equation "HP = Torque x RPM 5252". At 5252, horsepower will ALWAYS be the same as torque...ALWAYS. I don't care what anyone told you, that is messed up. It is possible the torque reading on that graph is exactly double what it is suposed to be.

If that torque curve was accurate then at 6400rpms you'd be making 426hp. At 4400rpms you'd be making 330hp. If you half those numbers then at 4400rpms you'd be making 165...which is EXACTLY what the HP curve says. At 6400rpms you'd be making 213hp...again EXACTLY HALF of what your HP measurment reads.

Second, you would have blown your engine on that run. No two ways about it. At 6000rpms you would have blown at least one or two apex seals. There is NO way around that. Even if you didn't blow your engine, ignoring the fact that you'd have detonation, you torque curve would severly change at that point. It would NOT be that flat with that signifigant of a change.

Also, just to let you know, turbo FC's are just as fickle as FD's. They have most of the same problems. No, there's arn't as many vaccuum lines, but the ones that are there break just as often, as well as many other things on the car. They're just not as expensive to fix when the time comes.

One more thing: This proves my point. With the torque being halved the hp and torque peak numbers are almost the same. Withen a few percent. I AM correct on this one.
 
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what the hell was i thinkin of? oh, a supra i think.

what is bhp compared to hp anyhow? sorry for the newb q but i never bothered to find out.
 
Matthew said:
what the hell was i thinkin of? oh, a supra i think.

what is bhp compared to hp anyhow? sorry for the newb q but i never bothered to find out.


BHP refers to "brake horsepower", or the horsepower at the crank. This is the same as SAE net horsepower now-a-days, I think.

SAE net horsepower is at the crank with all accesories on the motor. BHP I think might not have the accesories on the motor. I forget but that's pretty much it.

HP is just horsepower in general and can refer to any one of the many more specific "horsepower" terms.
 
Black Majik MSP said:
Maybe I'm being unfair, but if it's not turbo, I don't really consider it an RX-7...the only place a NA rotary belongs is in the RX-8.
A N/A is'nt a rotary that is silly, my 86 N/A FC is the best car i have ever owned It run's a 14.8 in the 1/4 and tears it up on a road corse. And it runs every single day, i love it.
 
Flat Black said:
Its not called an FB its called an SA.

Not exactly.. SA's (coming from the starting vin characters, SA22C) are 79-80 first generation RX-7s. The FBs are 81-85 first generation RX-7s. So, his club car, being an 83, is an FB. Most people say FB and mean all first gen rx-7s.

~brian
 
conekiller said:
Not exactly.. SA's (coming from the starting vin characters, SA22C) are 79-80 first generation RX-7s. The FBs are 81-85 first generation RX-7s. So, his club car, being an 83, is an FB. Most people say FB and mean all first gen rx-7s.

~brian
Thank you for explaining...and Yes, I do know the difference. Both of our clubs RX7's where FB's and my 1st gen is an FB(81, 83 and 85 being mine)

The reason why I said FB instead of SA22C in general is because they have many differences in design. Most parts are not interchangable between the SA's and FB's.
 
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Do you have a V8 conversion? My friend goes to clemson and has a second gen vert. He said something about most of the first gens are V8'd down there. He might join the car club. If I come down and visit him we should all meet up and go for a drive. Gotta love states that allow radar detectors :)

~brian
 
You guys crack me up!:p I have been told that I get a prize when I buy a 3rd gen due to my having alphabet soup. SA, FB, FC... Been there, done that.:D


JDuncan <---- Thinking that the RX-8 was very undeserving of the FE designation...
 
conekiller said:
Do you have a V8 conversion? My friend goes to clemson and has a second gen vert. He said something about most of the first gens are V8'd down there. He might join the car club. If I come down and visit him we should all meet up and go for a drive. Gotta love states that allow radar detectors :)

~brian

HAHA! That would be Rob Summers. No, I concider a V8 in a RX7 blaphemy...but accept it as I do free speech. There are 2 or 3 V8 '7s around...not all that many, but they do seem rather common.

JDuncan <---- Thinking that the RX-8 was very undeserving of the FE designation...

Have you drove an RX8 yet? Quite an amazing machine. I enjoyed the hour or so I had in the car and would buy one straight up if I had the money.
 
I have driven a couple of RX-8's. I truly like them, but I would have preferred something more along the lines of the car they took away from us. The least they could have done was save the FE designation for the next 2 seater and gave the RX-8 its own vin code.

I just can't make myself fall in love with the rear pillar. That and the "minivan" window pops on the rear windows.

Not bashing it... Just not loving it...
 
Oh, but just think, that'll make the next gen RX-7 the "FF" just like the "Fast and the Furious"!!


HAHA!!
 
Just to let you know, the "FB", "FC" and "FD" terms we've all come to know and love are chassis designations, not models. Example: FC3S is the chassis, not the model. In other words the new RX7 will be on the FE chassis.
 
Actually I'm pretty sure they come from the vin numbers.... That's why there was the change from SA22C to JM1FB, the govt made vin numbers standardized or something like that.
 

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