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-   -   How fast would a 700hp RX7 FD be (https://www.rx7club.com/v-8-powered-rx-7s-299/how-fast-would-700hp-rx7-fd-979152/)

c0reylen 12-04-11 02:43 AM

How fast would a 700hp RX7 FD be
 
Ok so how fast would a 700 horsepower RX7 be with a racing built naturally aspirated 700hp 440CI 7.2L LS7 block as the engine retaining same weight stats in a quarter mile...

and MORE IMPORTANTLY...what kind of time would it get on the nurburgring, given the suspension is good enough to handle the power?

would it in fact beat a corvette ZR1 on the ring, given lower weight and more power?

I know the v8 swap is possible, they have kits for it, they have shops willing to do turn key builds for it with your LSx and T56 tranny. don't even bother flaming be about the v8, it's better than the rotary for torque purposes, sounds better, and it's more reliable.

http://www.golenengineservice.com/en...n-short-block/ in fact CAN get 700+ and they claim up to 750hp naturally aspirated with the proper heads and cams

Blackadde/// 12-04-11 02:50 AM

http://2.bp.blogspot.com/-hgnPp9PZBv...f-trolling.jpg

2RotorsNaDream 12-04-11 02:53 AM

I see mods deleting this soon.

c0reylen 12-04-11 02:57 AM

why would the mods delete this when it's a very specific question, in the right place, within forum rules...? I'm only gunna get flamed by people, I'm not trolling or starting anything with others. it's a question I'm genuinely curious about and has great impact on whether or not I invest in a v8 swap later

edit:

by the way,

http://www.hinsonsupercars.com/p-32-turnkey-builds.aspx

obviously it's a very viable scenario, do not insult my intelligence because I said v8 in a rotary car.

Ryan95 12-04-11 03:24 AM

It would run the ring in under 6 minutes.
Unfortunately Germany doesn't allow V8 RX-7s. They've been illegal since 1992 when Henry Reisendorf killed himself in one on turn 9.

2RotorsNaDream 12-04-11 03:27 AM

You think people here dont know you can do V8 swaps?? I actually like the V8 swap, I wouldnt do it to my car but it is nice to drive around , so dont think thats the reason anyone is insulting your intelligence. We're insulting your "intelligence" because this is just a very dumb set of questions.

estevan62274 12-04-11 03:38 AM


Originally Posted by c0reylen (Post 10886515)
Ok so how fast would a 700 horsepower RX7 be with a racing built naturally aspirated 700hp 440CI 7.2L LS7 block as the engine retaining same weight stats in a quarter mile...

and MORE IMPORTANTLY...what kind of time would it get on the nurburgring, given the suspension is good enough to handle the power?

would it in fact beat a corvette ZR1 on the ring, given lower weight and more power?

I know the v8 swap is possible, they have kits for it, they have shops willing to do turn key builds for it with your LSx and T56 tranny. don't even bother flaming be about the v8, it's better than the rotary for torque purposes, sounds better, and it's more reliable.

http://www.golenengineservice.com/en...n-short-block/ in fact CAN get 700+ and they claim up to 750hp naturally aspirated with the proper heads and cams


Meh,... 700hp is so 2008 :)

BLUE TII 12-04-11 03:43 AM

Reminds me of Sport Compact Cars Ultimate Street Car Challenge in 2006 when they had a 500+ rwhp 427 FD.

Best 1/4mile ET it managed was a 15second run. Almost took out the K-rail on its 1st run.

It takes more than a lot of power to make a car fast...even in a straight line.

jplecas 12-04-11 03:43 AM

Lemme just go punch this all into my modified car track time simulator..


Originally Posted by c0reylen (Post 10886522)
why would the mods delete this when it's a very specific question,

the problem is that its too specific. Its extremely unlikely that you will find someone with a 700hp LS fd who has driven it at its limits on the ring, to post here and tell you the numbers. and whether or not that was faster than a zr1.

you may be able to get an idea for the quarter mile time on the v8 forum. But even the smell of another LS vs Rotary bitch fight in this part of town will get closed up real quick.

kensin 12-04-11 04:09 AM

Yes it will beat it ... Next question ?

Gringo Grande 12-04-11 04:29 AM

I'm with Black.

IBTL.

PS: Forza...amirite?

crzyone 12-04-11 05:07 AM

Without upgrading brakes and the lack of driver aids on an RX7 such as traction control it would be a handfull. I have no doubt a ZR1 designed for that much power would be quicker around the ring. As for drag, again, putting that much power down is going to be a problem on all but a tubbed out slick running drag machine.

I think a 400whp LS FD would be a hell of a lot more fun. More usable power and less drivetrain issues.

Nakd n Fearless 12-04-11 07:04 AM

this is why ur question angers people: what is this fascination with the nurburgring? who would spend that much cheddar on a seven to get a euro race reg 700rwhp lsx setup, pay for passports, ship it across the Atlantic, truck it across Europe, and hire a pro Italian driver crazy enough to put a time down?

but to answer ur question, it would most likely go plaid and reach ludicrous speed

arghx 12-04-11 11:21 AM

the chassis is simply not meant to handle that kind of power and torque

RotaryEvolution 12-04-11 12:15 PM


Originally Posted by BLUE TII (Post 10886546)
Reminds me of Sport Compact Cars Ultimate Street Car Challenge in 2006 when they had a 500+ rwhp 427 FD.

Best 1/4mile ET it managed was a 15second run. Almost took out the K-rail on its 1st run.

It takes more than a lot of power to make a car fast...even in a straight line.

this

this is why people are flaming you for the ignorant questions.

how fast can a 2000 horsepower RX7 go? probably slower than a stock one because you won't make it to the finish line in one piece or will be limping it around.

sure there's a number of 7's running around that horsepower level but mainly they are drag cars at that level. no one drives a track course on drag radials...

MOBEONER 12-04-11 01:21 PM

U know ...... U can just buy your self a vette and save your self a thousands and much labor of work trying to transform a FD into a vette.....

SPENT-IT 12-04-11 01:36 PM

It would be about this fast.

http://www.youtube.com/watch?v=kzlg3...layer_embedded

It makes the car front and top heavy.

Another example of physics and something a vette will NEVER be able to do.

http://www.youtube.com/watch?annotat...zd0&feature=iv



Sure they could make another 50-100HP but no need. If you are not familiar with this type of racing it's Group B. It was banned for a long time. The cars have the acceleration rate of F1 cars and not a V8.

Not trying to flame you but with the question you asked, it seems you do not have a understanding of physics.

Power is useless without control.

Montego 12-04-11 02:12 PM


Originally Posted by Nakd n Fearless (Post 10886604)
go plaid and reach ludicrous speed


:awesome:

http://www.ladyofthecake.com/mel/spa...ges/plaid2.jpg

https://www.motifake.com/image/demot...1211230621.jpg

SPENT-IT 12-04-11 02:46 PM

Couple more videos.
http://www.youtube.com/watch?v=cV0XJePUitI
http://www.youtube.com/watch?v=3fFs_...eature=related

Yes I could make my 7000lb. truck faster than your car but don't see the point of it. I don't need to haul lumber that fast.

Drag racing logic...The more you spend on your vehicle the less you drive...




Pictures saved^^favorite movie of all time...Thank you.

c0reylen 12-04-11 03:04 PM


Originally Posted by SPENT-IT (Post 10886901)
It would be about this fast.

http://www.youtube.com/watch?v=kzlg3...layer_embedded

It makes the car front and top heavy.

Another example of physics and something a vette will NEVER be able to do.

http://www.youtube.com/watch?annotat...zd0&feature=iv



Sure they could make another 50-100HP but no need. If you are not familiar with this type of racing it's Group B. It was banned for a long time. The cars have the acceleration rate of F1 cars and not a V8.

Not trying to flame you but with the question you asked, it seems you do not have a understanding of physics.

Power is useless without control.

an rx7 FD with an LS1 which has an engine weight of 500 lbs has a 51/49 weight distrobution, same as the Viper ACR. don't give me the physics speech when the damn weight distribution will STILL BE THE SAME. turbo manifolds weigh a LOT, which makes the 13B just as heavy. hold on bro...


http://www.youtube.com/watch?v=b7bahoGlL0A

http://www.youtube.com/watch?v=OtfkfsbZcMw

give me your physics lesson now mr professor. this isn't control? oh btw I'm not a huge fan of drifting, but it shows how well the car can handle, now go learn more physics and realize that the car handles perfectly with a v8 in it. not "OH GAWD YOU NOW HAS A 70/30 WEIGHT DISTROBUTION LULZ"

before you try to make me out to be an idiot, at least back up what you claim, instead of giving me replies of videos of cars crashing. I want to know what it would get on the nurburgring because it's my personal benchmark of how good a car is, quarter miles are nothing more than acceleration, while a useful thing to know, it does little to nothing to actually tell you how well a car performs. The ring is the perfect benchmark of how well a car will perform. if you don't wanna tell me what it'd get on the ring, try Laguna Seca? :D


Originally Posted by MOBEONER (Post 10886889)
U know ...... U can just buy your self a vette and save your self a thousands and much labor of work trying to transform a FD into a vette.....

Hmmm... rx7 FD shell - $3,000
racing built LS7 with 700hp naturally aspirated - round $10,000
T56 tranny - $2,000
v8 conversion kit - $3,800

total so far - $18,800. less than a 2010 v6 mustang, and more power than a ZR1, which costs WELL OVER 5 times the price... wanna bet?

SPENT-IT 12-04-11 03:15 PM

Yes it's top/front heavy and will help kick the rear end out and that's what you want for drifting. I would like to see under the hood, id bet it's tucked into the firewall to help with the weight ratio.

It's sliding all over.. the control is in the driver and steering.

c0reylen 12-04-11 03:18 PM

but...but...but, people weighing their LSx RX7's and S2000's are all claming around 50/50 weight distribution :3 and yes the engine is crammed in there lol

http://www.jagsthatrun.com/Pages/ima...7-LS1-1591.jpg

LSx engines are really small for a v8, it's a wonder how you can get 7.2L of engine in that space :3

1QWIK7 12-04-11 03:19 PM

So wait you don't want a lesson in car control, physics, v8 swap costs, weight distribution etc from anybody in this thread yet you wanna know how will a 700hp ls7 will perform at the ring?

Lol talk about trolling. You're trying anxiously to start a rotary vs v8 war.

Mods delete this crap.

c0reylen 12-04-11 03:31 PM


Originally Posted by 1QWIK7 (Post 10887021)
So wait you don't want a lesson in car control, physics, v8 swap costs, weight distribution etc from anybody in this thread yet you wanna know how will a 700hp ls7 will perform at the ring?

Lol talk about trolling. You're trying anxiously to start a rotary vs v8 war.

Mods delete this crap.

no I'm not trying to make a v8 vs rotary war, that'd be you.


Originally Posted by Keith Tanner (Post 14323266)

FROM LS1TECH

Thanks for the kind words, guys. It's pretty close to done from a mechanical standpoint, but I still have to do the bodywork and sort out some handling. And yes, this would have been a lot easier with a bead-blasted shell on a rotisserie. But you work with what you have. The garage spot where it was built measures 16'6" x 8', and that includes tool storage and my welding bench!

While I had the car at work on a lift, I dropped it on the scales. The car's in full street trim, including an (almost) full tank of gas, interior and even a spare tire. Looks like my estimate a year ago for a 2400 lb weight wasn't far off. 51.9/48.1 front/rear distribution's pretty darn good and the cornerweights are bang-on.
http://www.slowcarfast.com/MG/images_lrg/img_7213.jpg

http://www.slowcarfast.com/MG/images_lrg/img_7100.jpg

that would be THIS CAR. you really think the weight would be off in an rx7 FD? I couldn't find actual scales pics of any rx7 FD's so this will have to do.

SPENT-IT 12-04-11 03:46 PM

Yes, thank you 1QWIK7...
Look at my posts I never said anything about V8 vs rotary. I was just answering your question. No one on this forum really has to say what's better they just know.

If that's what you want to do go for it...just make your questions more specific...If you want examples just check out youtube.

We are just helping answer your question. That's what this community is about.


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