2nd Generation Specific (1986-1992) 1986-1992 Discussion including performance modifications and technical support sections.
Sponsored by:

My dyno chart from this weekend.

Thread Tools
 
Search this Thread
 
Old 08-04-03, 08:46 PM
  #1  
Rotary Freak

Thread Starter
iTrader: (1)
 
1FastT2's Avatar
 
Join Date: Feb 2001
Location: Sinking Spring Pa.
Posts: 1,790
Likes: 0
Received 0 Likes on 0 Posts
My dyno chart from this weekend.

For everyone who hasnt seen it in the single turbo section.

Heres the specs of the run.

-15psi
-94 octane pump fuel
-8.5:1 rotors
-TO4B 60-1, P trim, 0.84 tang exhaust housing
-85deg and almost %100 humidity (very hot out!)

Overall im pretty please with the 405hp but was disapointed with the torque. Im thinking it had alot to do with the weather. Let me know what you think.

Thanks,
Brian

Old 08-04-03, 09:51 PM
  #2  
Full Member

 
turbo-rotary's Avatar
 
Join Date: Mar 2003
Location: New Orleans
Posts: 129
Likes: 0
Received 0 Likes on 0 Posts
Not too bad.
Old 08-04-03, 10:38 PM
  #3  
Rotary Motoring

iTrader: (9)
 
BLUE TII's Avatar
 
Join Date: Mar 2001
Location: CA
Posts: 8,217
Received 765 Likes on 507 Posts
Awsome HP!

Is that corrected for a turbo? If not, yes that weather would have quite an affect (standard correction is for NA and weather affects them MUCH less).

Nice #s, Ian

Glad it never gets over 65 deg here...
Old 08-05-03, 12:32 AM
  #4  
Turn up the boost
RX7Club Vendor
iTrader: (12)
 
Turblown's Avatar
 
Join Date: Dec 2001
Location: Twin Cities, MN
Posts: 7,067
Received 91 Likes on 77 Posts
Those are good #s
__________________
Rotary Performance Parts


Old 08-05-03, 12:33 AM
  #5  
Turn up the boost
RX7Club Vendor
iTrader: (12)
 
Turblown's Avatar
 
Join Date: Dec 2001
Location: Twin Cities, MN
Posts: 7,067
Received 91 Likes on 77 Posts
Those are good #s, stock ports?
__________________
Rotary Performance Parts


Old 08-05-03, 12:39 AM
  #6  
Open up! Search Warrant!

 
Project84's Avatar
 
Join Date: May 2002
Location: Kicking down doors in a neighborhood near you
Posts: 3,838
Likes: 0
Received 2 Likes on 2 Posts
Very nice. Whats the a/r trim, 1.15?
Old 08-05-03, 01:05 AM
  #7  
Open up! Search Warrant!

 
Project84's Avatar
 
Join Date: May 2002
Location: Kicking down doors in a neighborhood near you
Posts: 3,838
Likes: 0
Received 2 Likes on 2 Posts
Any idea what the rear wheel HP and Tq is? It says flywheel graph at the very top in small print.
Old 08-05-03, 06:07 AM
  #8  
Rotary Freak

Thread Starter
iTrader: (1)
 
1FastT2's Avatar
 
Join Date: Feb 2001
Location: Sinking Spring Pa.
Posts: 1,790
Likes: 0
Received 0 Likes on 0 Posts
Originally posted by BLUE TII
Awsome HP!

Is that corrected for a turbo? If not, yes that weather would have quite an affect (standard correction is for NA and weather affects them MUCH less).

Nice #s, Ian

Glad it never gets over 65 deg here...
Im not sure what the correction factor was at.
Old 08-05-03, 06:07 AM
  #9  
Rotary Freak

Thread Starter
iTrader: (1)
 
1FastT2's Avatar
 
Join Date: Feb 2001
Location: Sinking Spring Pa.
Posts: 1,790
Likes: 0
Received 0 Likes on 0 Posts
Originally posted by 1Revvin7
Those are good #s, stock ports?
No, I have a pretty big street port.
Old 08-05-03, 06:09 AM
  #10  
Rotary Freak

Thread Starter
iTrader: (1)
 
1FastT2's Avatar
 
Join Date: Feb 2001
Location: Sinking Spring Pa.
Posts: 1,790
Likes: 0
Received 0 Likes on 0 Posts
Originally posted by Project84
Any idea what the rear wheel HP and Tq is? It says flywheel graph at the very top in small print.
Those #'s are wheel HP and TQ readings.
Old 08-05-03, 07:12 AM
  #11  
...

 
Ryde _Or_Die's Avatar
 
Join Date: Aug 2001
Location: Tampa, FL
Posts: 7,539
Likes: 0
Received 0 Likes on 0 Posts
Is that as high as your going to go? I'd love to see it turned up to like 20psi
Old 08-05-03, 07:28 AM
  #12  
Rotary Freak

Thread Starter
iTrader: (1)
 
1FastT2's Avatar
 
Join Date: Feb 2001
Location: Sinking Spring Pa.
Posts: 1,790
Likes: 0
Received 0 Likes on 0 Posts
Originally posted by Ryde _Or_Die
Is that as high as your going to go? I'd love to see it turned up to like 20psi
Nope, im going to keep adding boost and tweak the tuning till Im right about at 20psi. The run was just to see what my car would do with pump gas.
Old 08-05-03, 08:57 AM
  #13  
Rotary Enthusiast

 
projekt's Avatar
 
Join Date: Apr 2003
Location: NW Arkansas
Posts: 757
Likes: 0
Received 0 Likes on 0 Posts
smaller ports would up your torque, as would more pressure. remember torque = displacement.
Old 08-05-03, 09:06 AM
  #14  
W. TX chirpin Monkey

 
fastrotaries's Avatar
 
Join Date: Sep 2001
Location: Mesquite, TX
Posts: 2,684
Likes: 0
Received 0 Likes on 0 Posts
was the turbo chocking up top, hence the large margin between the two. I don't know the specs, so i'm just guessing.
Old 08-05-03, 09:14 AM
  #15  
Rotary Freak

Thread Starter
iTrader: (1)
 
1FastT2's Avatar
 
Join Date: Feb 2001
Location: Sinking Spring Pa.
Posts: 1,790
Likes: 0
Received 0 Likes on 0 Posts
Originally posted by fastrotaries
was the turbo chocking up top, hence the large margin between the two. I don't know the specs, so i'm just guessing.
There were no signs that the turbo was choking at all. The specs are in the 1st post.
Old 08-05-03, 10:59 AM
  #16  
Currently Winning

 
$150FC's Avatar
 
Join Date: May 2002
Location: Birmingham, AL
Posts: 2,438
Likes: 0
Received 0 Likes on 0 Posts
I fear your turbo lag, as your setup is a lot like mine :P

Great HP, but what's up with the Torque? Even with the weather I would have expected ~315ish, at least that high up in the revs.
Have you thought about going to maybe 8500 rpm? It doesn't look like your power is dropping off at all. The torque peaks at ~7000 or 7500, but since your torque figures are kinda out of wack to begin with for whatever reason, they may peak a little higher, too.

Check your PMs a little later tonight, too. I've got some questions for you.
Old 08-05-03, 11:07 AM
  #17  
Brother of the Rotary

iTrader: (2)
 
eViLRotor's Avatar
 
Join Date: Jun 2001
Location: Arkham Asylum
Posts: 5,781
Likes: 0
Received 1 Like on 1 Post
With a .84 A/R turbine, he shouldn't be lagging too much at all
Old 08-05-03, 11:36 AM
  #18  
Da Monee Pit

 
West TX RX-7's Avatar
 
Join Date: Dec 2001
Location: Littlefield, Texas
Posts: 843
Likes: 0
Received 0 Likes on 0 Posts
Nice numbers but your right the torque looks a bit low. Have you ever run on that dyno before?
Old 08-05-03, 12:03 PM
  #19  
Full Member

 
OPEC's Avatar
 
Join Date: Aug 2001
Location: FL
Posts: 92
Likes: 0
Received 0 Likes on 0 Posts
Nice numbers.. I hope to get mine up there sometime in the near future. But first I have to change out some parts.
Old 08-05-03, 12:20 PM
  #20  
Professional Lurker

 
Turbo Timmy's Avatar
 
Join Date: Feb 2001
Location: Orlando
Posts: 722
Likes: 0
Received 0 Likes on 0 Posts
That's wild how it jumps 30hp in the last 800 rpm...
Old 08-05-03, 01:39 PM
  #21  
BDC
BDC Motorsports

 
BDC's Avatar
 
Join Date: Jun 2002
Location: Grand Prairie, TX
Posts: 3,667
Likes: 0
Received 6 Likes on 6 Posts
Originally posted by 1FastT2
No, I have a pretty big street port.
It might be you've got the primary ports too large which will kill the mid-range a bit. The turbo itself is setup pretty well although I would vote for going to a larger hotside.

Good horsepower; the torque is shy about 50ft/lbs of where it should be.

B
Old 08-05-03, 02:17 PM
  #22  
Lives on the Forum

 
RETed's Avatar
 
Join Date: Feb 2001
Location: n
Posts: 26,664
Likes: 0
Received 16 Likes on 15 Posts
How big are the exhaust ports?&nbsp If the exhaust port has been moved extensively up or down, this'll kill torque.&nbsp Early exit of the exhaust gases decreases the time the combustion charge can "work" on the "crank" (or e-shaft) - very early opening of the exhaust port causes drastic drops in torque.

For example, I run a very early opening exhaust port (almost 1" lower than stock), which killed my torque numbers.&nbsp My car dyno'd 253.9hp at the wheels, but only making 207lb-ft of torque on that particular run.&nbsp I run these very large exhaust ports for top end power only.&nbsp For a broader power band (i.e. keep torque high), I wouldn't port the exhuast port as heavily...


-Ted
Old 08-05-03, 02:47 PM
  #23  
Rotary Freak

Thread Starter
iTrader: (1)
 
1FastT2's Avatar
 
Join Date: Feb 2001
Location: Sinking Spring Pa.
Posts: 1,790
Likes: 0
Received 0 Likes on 0 Posts
Originally posted by RETed
How big are the exhaust ports?&nbsp If the exhaust port has been moved extensively up or down, this'll kill torque.&nbsp Early exit of the exhaust gases decreases the time the combustion charge can "work" on the "crank" (or e-shaft) - very early opening of the exhaust port causes drastic drops in torque.

For example, I run a very early opening exhaust port (almost 1" lower than stock), which killed my torque numbers.&nbsp My car dyno'd 253.9hp at the wheels, but only making 207lb-ft of torque on that particular run.&nbsp I run these very large exhaust ports for top end power only.&nbsp For a broader power band (i.e. keep torque high), I wouldn't port the exhuast port as heavily...


-Ted
My exhaust ports open approx 3/8" earlier then a stock port but close at the same as stock.
Old 08-05-03, 08:41 PM
  #24  
Full Member

 
1nastyturboII's Avatar
 
Join Date: Aug 2003
Location: NYC
Posts: 198
Likes: 0
Received 0 Likes on 0 Posts
pretty decent numbers
Old 08-05-03, 08:42 PM
  #25  
Lives on the Forum

 
RETed's Avatar
 
Join Date: Feb 2001
Location: n
Posts: 26,664
Likes: 0
Received 16 Likes on 15 Posts
Hmmm...that's not an especially wild port.&nbsp You did a recent compression test?


-Ted


Quick Reply: My dyno chart from this weekend.



All times are GMT -5. The time now is 01:43 AM.