Rotary Drag Racing The place to post your racing stories and info

Running a 9second pass..........

Thread Tools
 
Search this Thread
 
Old 07-27-08, 08:27 PM
  #26  
Living life 9 seconds at a time

Thread Starter
iTrader: (2)
 
ErnieT's Avatar
 
Join Date: Feb 2001
Location: Abingdon, Md
Posts: 6,541
Likes: 0
Received 0 Likes on 0 Posts
Originally Posted by 13B-RX3
How much does your car weigh Ernie?
2780lbs with me in it.
Old 07-27-08, 08:38 PM
  #27  
7s before paint!!!

iTrader: (2)
 
13B-RX3's Avatar
 
Join Date: Aug 2003
Location: Philly/Texas
Posts: 3,814
Likes: 0
Received 0 Likes on 0 Posts
Originally Posted by ErnieT
2780lbs with me in it.

Here are some guidelines. I would start around 12 PSI. My car seemed to work best around 11 psi, below that and it skated around on the big end. Are your rear shocks adjustable?

http://www.mickeythompsontires.com/tech.php?bulletin=s3
Old 07-27-08, 09:02 PM
  #28  
Living life 9 seconds at a time

Thread Starter
iTrader: (2)
 
ErnieT's Avatar
 
Join Date: Feb 2001
Location: Abingdon, Md
Posts: 6,541
Likes: 0
Received 0 Likes on 0 Posts
Originally Posted by 13B-RX3
Here are some guidelines. I would start around 12 PSI. My car seemed to work best around 11 psi, below that and it skated around on the big end. Are your rear shocks adjustable?

http://www.mickeythompsontires.com/tech.php?bulletin=s3

Thanks! I have 32 way adj. coilovers. I have the front almost full hard. I was playing with the rear Saturday. I started at 14 which is too hard, i know.
Im going to start out at full soft next time and work my way harder if it bottoms out.
Old 07-27-08, 09:09 PM
  #29  
7s before paint!!!

iTrader: (2)
 
13B-RX3's Avatar
 
Join Date: Aug 2003
Location: Philly/Texas
Posts: 3,814
Likes: 0
Received 0 Likes on 0 Posts
I don't know a tremendous amount about IRS cars but i would imagine you would want the front as soft as possible (rebound) and the rear stiff (dampen) to plant the tires and transfer the weight of the car onto the tires. I am sure someone will chime in and confirm or debunk this.


This is from the proper suspension setup thread.


Originally Posted by silvr94r2
Dan: With the Supra's we had to gradually stiffen the rear as we made more power. We didn't change the setting at all from 800-900rwhp but at 1000rwhp we were in big trouble. We switched to a stiff sidewall slick and set the rear up really stiff. That was fine until 1200rwhp.....at that point we lightened the car up a little and corner weighted it. Then put ballasts back in and slowly started stiffening it up. Our car weighs 1000 lbs more than yours and makes more power but it's all relative.

Have you corner weighted your car? Do you know the front to rear ratio? You could either try and lighten the rear of your car or add some stiffness. If you lighten the rear with a hatch or something you could then ballast it back where you need it and adjust the shocks accordingly.

You might already know all this so sorry if i'm outta line. It's late and i just got in from hanging out.

Last edited by 13B-RX3; 07-27-08 at 09:21 PM.
Old 07-27-08, 11:15 PM
  #30  
Eats, Sleeps, Dreams Rotary

iTrader: (1)
 
ultimatejay's Avatar
 
Join Date: Nov 2006
Location: California
Posts: 4,148
Likes: 0
Received 2 Likes on 2 Posts
Originally Posted by 13B-RX3
I don't know a tremendous amount about IRS cars but i would imagine you would want the front as soft as possible (rebound) and the rear stiff (dampen) to plant the tires and transfer the weight of the car onto the tires. I am sure someone will chime in and confirm or debunk this.


This is from the proper suspension setup thread.
Yes, you want softer shocks up front so the weight transfers to the rear.
Old 07-27-08, 11:46 PM
  #31  
Rotary Enthusiast

 
Boostn7's Avatar
 
Join Date: Feb 2001
Location: Union, NJ
Posts: 867
Likes: 0
Received 0 Likes on 0 Posts
Originally Posted by 13B-RX3
I don't know a tremendous amount about IRS cars but i would imagine you would want the front as soft as possible (rebound) and the rear stiff (dampen) to plant the tires and transfer the weight of the car onto the tires. I am sure someone will chime in and confirm or debunk this.


This is from the proper suspension setup thread.
Yes, I completely agree.
Need to allow the front end to go up transfering that weight over to the rear helping with traction.

How much boost are you getting with anti-lag in 1st gear?

JD

Last edited by Boostn7; 07-28-08 at 12:02 AM.
Old 07-28-08, 12:36 AM
  #32  
Rotary Freak

iTrader: (3)
 
Jay7 Nyc's Avatar
 
Join Date: Feb 2004
Location: NYC - SFL
Posts: 1,696
Likes: 0
Received 0 Likes on 0 Posts
Congrats Ernie, you sure are one persistant ****. I top my hat off to you, i'm glad you haven't given up. You're bound to hit those single digit E.T's soon!!!

Jay7...

Last edited by Jay7 Nyc; 07-28-08 at 12:54 AM.
Old 07-28-08, 05:51 AM
  #33  
Living life 9 seconds at a time

Thread Starter
iTrader: (2)
 
ErnieT's Avatar
 
Join Date: Feb 2001
Location: Abingdon, Md
Posts: 6,541
Likes: 0
Received 0 Likes on 0 Posts
Originally Posted by Boostn7
Yes, I completely agree.
Need to allow the front end to go up transfering that weight over to the rear helping with traction.

How much boost are you getting with anti-lag in 1st gear?

JD
John,
Depends on how long Im on it. Usually around 14psi. If I on it less it will build less.
Old 07-28-08, 06:02 AM
  #34  
B O R I C U A

iTrader: (14)
 
KNONFS's Avatar
 
Join Date: Mar 2001
Location: VA
Posts: 5,480
Received 35 Likes on 29 Posts
CONGRATS Enie!

Once you sort out the bugs, not only you will run a single digit pass, but it will be an IMPERSIVE one too
Old 07-28-08, 07:46 AM
  #35  
Senior Member

 
timemachines's Avatar
 
Join Date: Jun 2006
Location: miami fl
Posts: 494
Likes: 0
Received 0 Likes on 0 Posts
beautiful runs the 9's r right there,,,hopefuffuly u get everything adjusted so u get what ur looking for,,,good luck
Old 07-28-08, 08:42 AM
  #36  
_________________________

iTrader: (3)
 
zinx's Avatar
 
Join Date: Jul 2002
Location: Indianapolis
Posts: 1,723
Likes: 0
Received 1 Like on 1 Post
I know this may sound like blasphemy in this section, but have you thought about turning the power down a bit to get your launching sorted out? You've got the MPH for a mid-low 9s pass, so if you turn it down a bit, get it sorted out at that power, and then turn it up slowly it may yield better results.

Also, I can't remember what EMS you are running, but does it allow for any boost-by-gear, or boost-by-time settings?
Old 07-28-08, 09:29 AM
  #37  
Will work for horsepower

 
Busted7's Avatar
 
Join Date: Mar 2006
Location: Springfield, MO
Posts: 1,865
Likes: 0
Received 1 Like on 1 Post
Ernie your probley getting tired of getting advice from guys like me that dont run as fast but were pulling for you and trying to help!

The 11.5 et slowed down my 60 becouse i dont have the torque you have so they should help, soften up the front to get the transfer and i would keep the rear about 3/4 stiff to start, and if you can stage the wastegate and bring all that power on latter in the run then it would be more manageable.

From there its seat time and what the setup tells you it wants!
You will get there becouse your determined and not quitting which is probley why you can afford to keep trying!

Anyway good luck and have fun!
Old 07-28-08, 12:31 PM
  #38  
Rotary Enthusiast

 
Boostn7's Avatar
 
Join Date: Feb 2001
Location: Union, NJ
Posts: 867
Likes: 0
Received 0 Likes on 0 Posts
Originally Posted by ErnieT
John,
Depends on how long Im on it. Usually around 14psi. If I on it less it will build less.
Sorry, I meant overall boost in 1st gear before going into 2nd.

I'm sure with the anti-lag you get boost instantly and possibly getting higher boost in 1st gear over no anti-lag.

JD
Old 07-28-08, 01:13 PM
  #39  
Rotary Freak

 
Join Date: Jan 2002
Location: l.a.
Posts: 1,640
Likes: 0
Received 0 Likes on 0 Posts
just take off in 2nd gear. barring any breakage, you'll hit your 9 instantly.
Old 07-28-08, 01:37 PM
  #40  
Boost

 
Torque South's Avatar
 
Join Date: Oct 2007
Location: Florida
Posts: 498
Likes: 0
Received 0 Likes on 0 Posts
Originally Posted by fdracer
just take off in 2nd gear. barring any breakage, you'll hit your 9 instantly.
That works real well for me in video games.
Seriously is that an option? I did highly recommend it to a customer with a 450 hp SSR that has ridiculously unnecessary 4.56 gears and consistently running crap times.

Congrats Ernie, you're already there for all intents and purposes. But your camera man SUCKS!
Old 07-28-08, 02:32 PM
  #41  
'Tuna'

 
crispeed's Avatar
 
Join Date: Feb 2001
Location: Miami,Fl,USA
Posts: 4,637
Likes: 0
Received 3 Likes on 3 Posts
Originally Posted by zinx
I know this may sound like blasphemy in this section, but have you thought about turning the power down a bit to get your launching sorted out? You've got the MPH for a mid-low 9s pass, so if you turn it down a bit, get it sorted out at that power, and then turn it up slowly it may yield better results.

Also, I can't remember what EMS you are running, but does it allow for any boost-by-gear, or boost-by-time settings?
Probably the best advice if Ernie will listen.
ET streets in my opinion don't belong on a car at that level in my opinion.
Put some slicks on it and figure out how much power it needs to launch safely without bogging or breaking. I don't know anyone with a true 7-9sec rotary that needs antilag to leave the line. On a proper setup you can make more boost than the tires could handle just on the two step.
The rest have to do wth the driver's right but more so left foot clutch control!

Last edited by crispeed; 07-28-08 at 02:37 PM.
Old 07-28-08, 02:40 PM
  #42  
Rotary Enthusiast

 
showoff's Avatar
 
Join Date: Feb 2004
Location: New york
Posts: 1,391
Likes: 0
Received 0 Likes on 0 Posts
ernie iam just curious what did you change between this video http://youtube.com/watch?v=HZ3HTrQ-WEo
till now??? because your launch and 1-2shift on the old video looks alot better then your present situation.. u still spun some, but it looked like you were doing much better out the hole then where you are right now, if you paired that launch with the way your car is running now you'd be in the 9s for sure! goodluck hopefully you knock down that 9sec barrier soon, u deserve it
Old 07-28-08, 06:45 PM
  #43  
Living life 9 seconds at a time

Thread Starter
iTrader: (2)
 
ErnieT's Avatar
 
Join Date: Feb 2001
Location: Abingdon, Md
Posts: 6,541
Likes: 0
Received 0 Likes on 0 Posts
Thanks for the help guys. That last vid posted, Ray let me borrow his Koni drag shocks that Peter had made, but they are getting re-valved for his Time Attack car. Im considering the the HKS Drag Coilovers. Right now I have the HKS Hipermax coilovers.
Im ordering the slicks.
Old 07-28-08, 07:35 PM
  #44  
_________________________

iTrader: (3)
 
zinx's Avatar
 
Join Date: Jul 2002
Location: Indianapolis
Posts: 1,723
Likes: 0
Received 1 Like on 1 Post
Awesome, I think in your case, slicks will make a tremendous difference.

Not to get off topic, but i was reading your sig. What is the IRS RX-7 Record?
Old 07-28-08, 07:43 PM
  #45  
Banned. I got OWNED!!!
 
680RWHP12A's Avatar
 
Join Date: Aug 2002
Location: chatsworth,Ca.
Posts: 4,666
Likes: 0
Received 1 Like on 1 Post
dont put the slicks on with the fd tranny, carnige will follow.. not to mention you will get used to how the car drives on slicks then when yor competing with the et streets you will have to re-learn how to drive the car ...when i used to run the et streets(reqd for the street class) i would launch on 10 psi with the tires @ 12 psi.. it netted in the foot time range.the car weighed in @ 2,800 with driver ..

your getting there i think your right around carl's times arent you? anyways nice #'s T-DAWG
Old 07-28-08, 07:43 PM
  #46  
ari
Sponsor
RX7Club Vendor
 
ari's Avatar
 
Join Date: Feb 2007
Location: Texas, USA
Posts: 123
Likes: 0
Received 0 Likes on 0 Posts
Hey Ernie.

I don't get on the forum as much as I should... Congratulation on the weekend, I'm sure you'll make it happen next time out. I can already see it, you and lee going back and forth... hahahah funny!



And by the way everyone's signatures are looking...

IRS record is coming to a new home!!
__________________


http://WWW.RX7.COM
Garland, TX
USA
330-7-ROTARY (330)776-8279
Old 07-28-08, 07:46 PM
  #47  
ari
Sponsor
RX7Club Vendor
 
ari's Avatar
 
Join Date: Feb 2007
Location: Texas, USA
Posts: 123
Likes: 0
Received 0 Likes on 0 Posts
I remember the street class days... which car did you have that came in at 2800lbs???



Originally Posted by 680RWHP12A
dont put the slicks on with the fd tranny, carnige will follow.. not to mention you will get used to how the car drives on slicks then when yor competing with the et streets you will have to re-learn how to drive the car ...when i used to run the et streets(reqd for the street class) i would launch on 10 psi with the tires @ 12 psi.. it netted in the foot time range.the car weighed in @ 2,800 with driver ..

your getting there i think your right around carl's times arent you? anyways nice #'s T-DAWG
__________________


http://WWW.RX7.COM
Garland, TX
USA
330-7-ROTARY (330)776-8279
Old 07-28-08, 08:05 PM
  #48  
7s before paint!!!

iTrader: (2)
 
13B-RX3's Avatar
 
Join Date: Aug 2003
Location: Philly/Texas
Posts: 3,814
Likes: 0
Received 0 Likes on 0 Posts
Originally Posted by crispeed
ET streets in my opinion don't belong on a car at that level in my opinion.

Hmmmmm, at what level should the ET streets be removed?
Old 07-28-08, 08:19 PM
  #49  
Banned. I got OWNED!!!
 
680RWHP12A's Avatar
 
Join Date: Aug 2002
Location: chatsworth,Ca.
Posts: 4,666
Likes: 0
Received 1 Like on 1 Post
Originally Posted by 13B-RX3
Hmmmmm, at what level should the ET streets be removed?
i was wondering that too.. i know guys running mid 7's on drag radials .unlimited drag radial class in the psca to be exact
Old 07-28-08, 09:57 PM
  #50  
Senior Member

 
timemachines's Avatar
 
Join Date: Jun 2006
Location: miami fl
Posts: 494
Likes: 0
Received 0 Likes on 0 Posts
Originally Posted by zinx
Awesome, I think in your case, slicks will make a tremendous difference.

Not to get off topic, but i was reading your sig. What is the IRS RX-7 Record?
8.84 e.t. http://videos.streetfire.net/video/t...884_157450.htm
but we really wish him the best in the getting it it b nice if the competition stays here in the U.S


Quick Reply: Running a 9second pass..........



All times are GMT -5. The time now is 10:00 PM.