Notices
Series I Major Horsepower Upgrades This is the place to discuss Super Chargers and Turbos, Nitrous, Porting, etc

The 383 RX8...Youtube video's 500hp/tq

Thread Tools
 
Search this Thread
 
Rate Thread
 
Old 09-12-2010, 09:39 PM
  #1  
outinnowhere3193
Thread Starter
iTrader: (2)
 
outinnowhere3193's Avatar
 
Join Date: Oct 2008
Location: Hymera, Indiana
Posts: 165
Likes: 0
Received 1 Like on 1 Post
The 383 RX8...Youtube video's 500hp/tq

Like it says...a couple video's...anyways the car is still for sale if anyone is interested...but just so everyone knows it has a 383 that's fully built. The block is Iron...yes I know but everything else is aluminum so engine weight isn't that big of a difference between the lsx and my 383.

Anyways the tires are Nitto 295/45's......YES I got that big of a tire on there. Had to actually lift the car to fit it. But it's the only way you can really use the power this motor has.

First video......
http://www.youtube.com/watch?v=VW8R9CP2pOo

I spin first and second and all I do is shift to third...didn't accelerate or anything.

Video two is just more less a burn out and a turn around but you get to hear it decently idle and everything.

http://www.youtube.com/watch?v=nIyQ77QFzDA


and of course here is the idle and rev sitting still

http://www.youtube.com/watch?v=_5t_VyAelMs

Last edited by outinnowhere3193; 09-12-2010 at 09:48 PM.
Old 09-12-2010, 10:07 PM
  #2  
whines all the way home
iTrader: (2)
 
Rotr8's Avatar
 
Join Date: Oct 2004
Location: Towson/Baltimore, MD
Posts: 7,402
Likes: 0
Received 2 Likes on 2 Posts
between the lifting and the sound, ehhhh just doesnt do anything for me...
Old 09-12-2010, 10:25 PM
  #3  
outinnowhere3193
Thread Starter
iTrader: (2)
 
outinnowhere3193's Avatar
 
Join Date: Oct 2008
Location: Hymera, Indiana
Posts: 165
Likes: 0
Received 1 Like on 1 Post
Originally Posted by Rotr8
between the lifting and the sound, ehhhh just doesnt do anything for me...

Good....ehhhh your not my type.
Old 09-12-2010, 10:47 PM
  #4  
Asshole for hire
iTrader: (1)
 
paulmasoner's Avatar
 
Join Date: Jun 2006
Location: Colfontaine, Belgium
Posts: 3,214
Likes: 0
Received 3 Likes on 3 Posts
4x4 truck anyone?

ugh
Old 09-13-2010, 01:09 AM
  #5  
Registered
 
cptpain's Avatar
 
Join Date: May 2004
Location: Killeen, TX
Posts: 74
Likes: 0
Received 0 Likes on 0 Posts
why not run a smaller rim with a tall tire?

Slicks?
Old 09-13-2010, 02:17 AM
  #6  
I divide by zero
 
Mawnee's Avatar
 
Join Date: Aug 2007
Location: Spring Hill, FL
Posts: 1,192
Likes: 0
Received 0 Likes on 0 Posts
I still say your guessed HP/TQ is very very optimistic. While a 383 CAN make 500hp it takes a HUGE cam(yours isnt), expensive CNC heads(yours arent), a quality set of longtubes(heh) and full 3" exhaust. The bigs boys making over 500hp have $8-10k under the hood. Even well built moderate budget 383 setups are usually just over 400hp. I'd love to see you put this on a dyno and prove me wrong, but I bet you would be very suprised with the results.

The turbo on my Rx8 was 'capable' of making 400rwhp. But I didnt go around saying "400hp Rx8"!
Old 09-13-2010, 02:39 AM
  #7  
WENTGERMAN
iTrader: (6)
 
shadycrew31's Avatar
 
Join Date: Apr 2008
Location: Burbs,PA
Posts: 5,806
Received 31 Likes on 22 Posts
I would have cut the fenders to lower the car... Or put some dirt tires on and make a rally car.
Old 09-13-2010, 06:05 PM
  #8  
outinnowhere3193
Thread Starter
iTrader: (2)
 
outinnowhere3193's Avatar
 
Join Date: Oct 2008
Location: Hymera, Indiana
Posts: 165
Likes: 0
Received 1 Like on 1 Post
Originally Posted by Mawnee
I still say your guessed HP/TQ is very very optimistic. While a 383 CAN make 500hp it takes a HUGE cam(yours isnt), expensive CNC heads(yours arent), a quality set of longtubes(heh) and full 3" exhaust. The bigs boys making over 500hp have $8-10k under the hood. Even well built moderate budget 383 setups are usually just over 400hp. I'd love to see you put this on a dyno and prove me wrong, but I bet you would be very suprised with the results.

The turbo on my Rx8 was 'capable' of making 400rwhp. But I didnt go around saying "400hp Rx8"!

As far as the work I have done...all my parts are name brand and are top of the line... As far as cost in the engine not sure what my total dollar is. But I do know my heads and cam together is about 2500 alone. In the whole build not including the tires and rims I have 8 or 9k in it easy. IDK I have receipts I could easily add it up for ya. But anyways I know what I had running turbo as well and the tires I had on the car was decent and they grabbed decently...with this motor there wasn't any traction.

When I was boosting... I dyno'd at 306 whp at 8psi. later on I started tuning and was boosting at 15psi I never knew what my total output was but I do know there was a huge difference between 8 and 15 so I always assumed I was around the 400whp.

Actually anyone know what Cam at pettit racing's supercharged hp is? I could pull it and leave it sitting without a problem.

Anyways I know it's a hell of a lot faster with this motor then when I was turbo'd


and as far as why not run a smaller rim with a tall tire?

Slicks?


Small rim and taller tire you end up say a 15 that's taller would match the 18's stock low profile. Now saying that you end up with the same traction which isn't near enough.

Only way to get traction without going taller would be to go wide and I went wider but I didn't want the tires sticking way out
Old 09-13-2010, 06:12 PM
  #9  
Registered
 
SPHINX144's Avatar
 
Join Date: Apr 2009
Location: Houston, Tx
Posts: 646
Likes: 0
Received 1 Like on 1 Post
is that supposed to be a rally rx8? I wonder who will buy this.
Old 09-13-2010, 07:01 PM
  #10  
Registered
iTrader: (4)
 
zenrx8's Avatar
 
Join Date: Jun 2007
Posts: 456
Likes: 0
Received 0 Likes on 0 Posts
I'm surprised, I like it. No, it's not the same as an '8 with a rotary, but it still has its own appeal. I guess the only thing that makes my blood boil more than a boosted 13B at full song is a cammed V8. One thing it's got that no rotary's got is torque, torque, torque, especially if it's a stroker. Nice job, there's somebody out there who's got a nut for this.

Don't let the haters get you down.
Old 09-13-2010, 07:16 PM
  #11  
angeljoelv
 
angeljoelv's Avatar
 
Join Date: Apr 2007
Location: Florida
Posts: 1,635
Likes: 0
Received 1 Like on 1 Post
^^^ I dont know about you, but I wouldnt be so sure about rotaries not having torque torque torque. this looks good to me. Nothing compared to a v8 ( with work done ofcourse) but certainly enough to make you jeeze in your pants
http://www.youtube.com/watch?v=b7ozT...layer_embedded
And theres a 1st gen with 1002 HP around. Im guessing that has plenty of torque too

Last edited by angeljoelv; 09-13-2010 at 07:18 PM.
Old 09-13-2010, 07:22 PM
  #12  
Registered
iTrader: (4)
 
zenrx8's Avatar
 
Join Date: Jun 2007
Posts: 456
Likes: 0
Received 0 Likes on 0 Posts
Well, 3 rotors, yeah, that helps. I was still thinking 13B, even with FI, struggles to keep up with a stroked V8 - the e-shaft to rotor face length is limited and the peritrochoidal motion (I love that word) doesnt' have the same energy transfer as a straight con rod. But I agree with your point, 20Bs and 4 rotors definitely cna be a match for a V8; last I checked, it would take a stroked, cammed 454 to match the 3 rotor in your video.
Old 09-13-2010, 10:42 PM
  #13  
I divide by zero
 
Mawnee's Avatar
 
Join Date: Aug 2007
Location: Spring Hill, FL
Posts: 1,192
Likes: 0
Received 0 Likes on 0 Posts
Originally Posted by outinnowhere3193
As far as the work I have done...all my parts are name brand and are top of the line... As far as cost in the engine not sure what my total dollar is. But I do know my heads and cam together is about 2500 alone. In the whole build not including the tires and rims I have 8 or 9k in it easy. IDK I have receipts I could easily add it up for ya. But anyways I know what I had running turbo as well and the tires I had on the car was decent and they grabbed decently...with this motor there wasn't any traction.
The parts you listed in your build thread are far from top of the line. Top of the line heads like AFRs cost 2k bare(no valves, springs, ect). The cams for big power are in excess of .600" lift with durations in the 260s. Yours is barely more than a gm hotcam. Not bashing, just saying realistically with your parts I would say you are making closer to 400hp.

Even if you are only making 400hp its gonna pull alot harder than a 400hp turboed Renesis because you have more power at 2k rpm than it will make at 6k. The beauty of a V8
Old 09-14-2010, 05:15 AM
  #14  
Registered
iTrader: (4)
 
zenrx8's Avatar
 
Join Date: Jun 2007
Posts: 456
Likes: 0
Received 0 Likes on 0 Posts
I still say respect. I'd bet that stroker is a hell of a lot easier to tune than my car

That being said, the rotary disease is still in my blood, and I don't see an antidote any time soon.
Old 09-14-2010, 04:52 PM
  #15  
outinnowhere3193
Thread Starter
iTrader: (2)
 
outinnowhere3193's Avatar
 
Join Date: Oct 2008
Location: Hymera, Indiana
Posts: 165
Likes: 0
Received 1 Like on 1 Post
Originally Posted by zenrx8
I still say respect. I'd bet that stroker is a hell of a lot easier to tune than my car

That being said, the rotary disease is still in my blood, and I don't see an antidote any time soon.
Yes it's a hell of a lot easier to tune...tuned within like 20 minutes lol...not max tuned but tuned. Timing got set to a max of 36 degree's with a static of 16 and then from there...adjusted my idle mixture and then for the drive I increased the fuel pressure just a little to get a good steady 11.5 -12 AFR

As far as cams I'm not going to argue about any of it. I had help putting the pieces together. As far as RHS vs AFR my flow rates are a lot higher then the AFR 190's I have like .650 in lift on my valves....it's actually like .64 something but close enough to .650 which was the max lift for those heads.

Yes it's going to feel different cause I have power from the get go...and the rotary was fun...don't get me wrong...but lets see no power till your turbo spools and then it's still not the as good as the v8.

I like to play slide a corner here and there..and with the V8 I just stomp on the gas and let the motor throw me sideways....the turbo was like hit the throttle then turn the wheel hoping that the turbo spooled just right and it kicked sideways just right.

Of course when I was turbo'd it took a bit to spool mine but when it did it was there. So I'd go from stock power to pressed in the seat or smoking the tires. It was a great feeling hearing the turbo and feeling it with the rotary. But for play matters if you wasn't already in high rpm's where the turbo would spool almost right away it wasn't idea for me.

Nothing sucks more then someone pulling up beside ya and wanting to run ya and you both shift down and hit it and he pulls you and you lose cause by the time your turbo spooled it was just enough for you to lose.

Personally I don't think you can go wrong with the V8...

Oh and the video isn't a stock motor either...it's fully built with a turbo. That's a 20k plus motor in that car.... Hell if I had 20k to drop in I'd have a 505 supercharged in my car doing insanely stupid numbers.

But lets look at this...V8 running off pump gas with nothing to go wrong. Just drive the damn thing...no let it warm up...or watching your oil, or coils going out...The rotary is very costly and takes a lot of care that's why I went with the V8...build it, drop it in and drive the HELL outta it.
Old 09-14-2010, 05:06 PM
  #16  
Bigus Rotus
iTrader: (3)
 
Nemesis8's Avatar
 
Join Date: Jun 2004
Location: Missouri
Posts: 8,573
Likes: 0
Received 1 Like on 1 Post
Back in the day, I had a .515 lift with 302 duration in my 351 Cleveland, and it would light up my L60's with ease. Of coarse the Holley 850 double pumper and Edelbrock manifold helped a bit.. LOL

You need to paint that thing like the General Lee dude
Old 09-14-2010, 07:18 PM
  #17  
Registered
 
Rote8's Avatar
 
Join Date: Oct 2007
Location: Boosted...
Posts: 1,574
Likes: 0
Received 2 Likes on 2 Posts
Originally Posted by outinnowhere3193
Actually anyone know what Cam at pettit racing's supercharged hp is? I could pull it and leave it sitting without a problem.
t
330 RWHP for the "big" pulley at 15 PSI; with a sane tune.
I am guessing 380 RWHP at 15PSI with a WAY too lean tune and methanol/ntromethane injection.
(RIP @ 15 to 1 A/F ratio 10K RPM)

Now I am around 300 RWHP with low compression rotors and a tune that would (probably) run 87 octane at 10 PSI....
Old 09-19-2010, 12:33 AM
  #18  
It's a Cavalier
 
YaXMaNGTO's Avatar
 
Join Date: May 2007
Location: Austin, TX
Posts: 1,926
Likes: 0
Received 5 Likes on 2 Posts
Hey thanks for posting the videos!

I was wondering about the gearing... what mph do you get redlining in 1st gear?
Is the transmission a T56? what's it out of? have you change the diff gearing?

How do you feel the rest of the stock drivetrain bits are taking the power? Any problems yet?
Old 09-19-2010, 09:29 AM
  #19  
outinnowhere3193
Thread Starter
iTrader: (2)
 
outinnowhere3193's Avatar
 
Join Date: Oct 2008
Location: Hymera, Indiana
Posts: 165
Likes: 0
Received 1 Like on 1 Post
Originally Posted by YaXMaNGTO
Hey thanks for posting the videos!

I was wondering about the gearing... what mph do you get redlining in 1st gear?
Is the transmission a T56? what's it out of? have you change the diff gearing?

How do you feel the rest of the stock drivetrain bits are taking the power? Any problems yet?
I already had the 3.90 gears from when I went turbo'd the the T56 is out of the Camaro...the first one that was built that has the higher gearing...I think 94 was when they started it and mine is a 95. My 6th gear is like .50 or something. Plus the taller tires...but anyways I'm not sure what my 1st gear tops out at. I haven't drove the car on the street much. I never messed with hooking up with the

But according to a calculator my speed in first at 6000rpm would be 50mph...My motor should climb 6500 but of course I try not to push it that hard.

Which explains why I have to drive 50 in 5th and can't use 6th....lol

2000rpm drives me at 87 mph....which give me a top end speed of 261 mph at 6000rpm....

When I built this I did it all like this on purpose. Still have the low end power to play and have great take offs...but yet the perfect final gears that would get me gas mileage.

In 5th gear 60mph is at about 2050rpm or 2100 somewhere in that neighborhood.

I can drive 60 in 6th but you can tell the rpm's are rather low and that the engine on hills and such struggles but straight road she just floats the 60 mph in 6th without any problems.

I guess 5th is a highway gear and 6th is my interstate gear

I love the gearing.


Top speed at 6000rpm

First 50mph
Second 73mph
Third 100mph
Forth 130mph
Fifth 176mph
Six 261mph
Old 09-26-2010, 09:51 PM
  #20  
Registered User
 
rx25det's Avatar
 
Join Date: Mar 2010
Posts: 7
Likes: 0
Received 0 Likes on 0 Posts
props here. sounds too beast to not recognize
Related Topics
Thread
Thread Starter
Forum
Replies
Last Post
galognu
Rotary Swaps
138
11-16-2020 05:20 AM
LB2739
New Member Forum
5
07-09-2019 02:25 AM
zoom44
General Automotive
10
09-29-2015 09:56 PM
tommy26Germany
Series I Trouble Shooting
11
09-29-2015 10:33 AM
Irvinb16
New Member Forum
5
09-11-2015 10:27 PM



You have already rated this thread Rating: Thread Rating: 0 votes,  average.

Quick Reply: The 383 RX8...Youtube video's 500hp/tq



All times are GMT -5. The time now is 10:44 PM.