DSP... check in! - Page 18

racerjon1 · 12-12-2010, 09:31 AM

Quote:

Originally Posted by solo-x

Latest update on the DSP ITR. I've finally upgraded the stock diff to an OS Gikken. This should solve the wheelspin issues I was having, and should help the car come off corners better.

Wonderful. Cause we needed you to come out of corners (and off the line faster...

Quote:

Originally Posted by solo-x

ps. Jon, I'm going to be seriously disappointed if you don't make any Pros next year.

I am pretty sure there is no way I can make any pros. The closest one is Blytheville and it's during One Lap of America. The NJ Pro is May 21, and I will have to be in Savannah that Friday.. and being that I was 3 hours late for a Pro Solo that was 100 miles closer, I don't even think I will try.

I also have a team who is waiting on some final word for us to run the entire Redline Series, which kills other events, so unless SCCA allows a 0-eventer to register for the Finale, it isn't happening.

I will probably throw a bar in the car and run 3-4 Hillclimbs instead, but I am really upset about this year's pro schedule.

Jon

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solo-x · 12-13-2010, 09:54 AM

Power is no good if you can't put it to the ground... I doubt I'll see much improvement off the line though. That's a fundamental drive train layout issue.

racerjon1 · 12-13-2010, 02:42 PM

Quote:

Originally Posted by solo-x

I doubt I'll see much improvement off the line though. That's a fundamental drive train layout issue.

I would bet you see a little - in my experience the LSD behaving better should help with grip over curface changes, which you will see on the Pro Solo launch areas with different times of the event/track widths/aggregate-clean surface mix all coming into play. Sure the drivetrain layout is "wrong" but the better LSD will help with those factors.

I know it does in RWD/AWD so I can't see why you wouldn't see an improvement in FWD, if nothing else consistancy through changing conditions.

Jon

WastingTime · 02-09-2011, 11:30 PM

To give an update on my little car, I finally have almost everything figured out. I have a lot of parts to put on the car to get it to the limit of DSP but the main ones include

Moore Performance NA Header
Hydra 2.5RS EM
OBX Front LSD

Now my only problem will be my gearing, as some of you run into running the 15s. My first gear is short as fuq and in 2nd I'm almost always hitting rev limit. I realize I will gain a bit of gear with bumping up my red line, but that can only do some much.

I have talked with some guys locally and they have suggested to jump up in tire size... 17s or possibly even 18s. Have any of you gone that big? If not, do you see any huge drawbacks if I can keep the tire/wheel weight down?

Jarrett

madlib · 02-10-2011, 03:15 AM

yeah...I run 18's. I chose 18's because the 285/30/18 is shorter than any wide size on 17's.
Also, it is shorter than the OE size so that is also a plus. I tried 275/35/15 tires and I still prefer the 18's.

racerjon1 · 02-10-2011, 09:49 AM

I chose the 15s and then spin the engine to 7200. The problem is we can't really make any more power after 6550 or so, so it's just more of a "use it in a pinch" situation.

There is a final drive ud/bd change I am considering to make the gear taller, and I have been on 17s/18s and it takes away a lot of what the car does right, especially the feel of the car and making it nimble and quick.

What I want is a 255/35/15.. but I don't see that happening.

In the end it's all a compromise (as with anything you do to your car) and you have to find which works best. Ideal world I would have a setup for the 18s and longer courses, and 15s for shorter courses, or 245-17s for airport transition courses, etc..

racerjon1 · 02-10-2011, 09:54 AM

Also...

there are a couple things for us in the Street Perpared works.

1) They are working on approving the master cyl brace that attaches to the shock tower/keeps the firewall from flexing under braking.

2) I have written for a clarification that could have some interesting implications. SPAC hasn't voted on it yet and I feel the letter I did get is vague, so I will hold off on details for now.

WastingTime · 02-10-2011, 02:32 PM

Quote:

Originally Posted by racerjon1

I chose the 15s and then spin the engine to 7200. The problem is we can't really make any more power after 6550 or so, so it's just more of a "use it in a pinch" situation.

There is a final drive ud/bd change I am considering to make the gear taller, and I have been on 17s/18s and it takes away a lot of what the car does right, especially the feel of the car and making it nimble and quick.

What I want is a 255/35/15.. but I don't see that happening.

In the end it's all a compromise (as with anything you do to your car) and you have to find which works best. Ideal world I would have a setup for the 18s and longer courses, and 15s for shorter courses, or 245-17s for airport transition courses, etc..

Thanks for the input Jon. What is the ud/bd change that gives you a taller gear?

And I agree on having two sets of tires for different courses, but the money that would require and hauling two sets of tires to every race would be a major pain

racerjon1 · 02-10-2011, 03:31 PM

Quote:

Originally Posted by WastingTime

Thanks for the input Jon. What is the ud/bd change that gives you a taller gear?

And I agree on having two sets of tires for different courses, but the money that would require and hauling two sets of tires to every race would be a major pain

I forget off the top of my head right now which transmission it is, (I am blessed with being around some really in-depth Subaru geeks) but one of the ones has the 3.90 final drive I believe vs the 4.11 with the same gearsets otherwise. I think it moves 2nd gear from 57mph to 61mph with the 275/35/15s on it.

As far as the other sets, I bring the "narrow" set to courses I know are going to be mainly transitions. I have the set of 18s on the car but are currently used for rains, so with a truck or trailer for the larger events it wouldn't be hard to bring sets of tires as gearing.

Jon

WastingTime · 02-10-2011, 04:07 PM

3.545 / 2.111 / 1.448 / 1.088 / 0.780 / 3.900FD - '96-'01 USDM Impreza L/OBS
3.545 / 2.111 / 1.448 / 1.088 / 0.825 / 3.900FD - '95 USDM Impreza 1.8L

Those are only two 3.9 final drive ratios that I can find that aren't turbo'd. Can we ud/bd with an L or OBS? and would I have to swap the entire driveline??

Storm · 02-10-2011, 04:53 PM

Look beyond 04-05 for 3.90 final drives.

Jay

BAN SUVS · 02-10-2011, 06:36 PM

My recollection is that all '02+ 2.5i/RS/TS have 3.90 except the '05 RS Sport/Pro package that came with the upgraded seats and stuff.

Murphy2012 · 02-11-2011, 10:21 AM

Hey everyone, I have been prepping a DSP 01 RS for local autocrossing and hillclimbs up here in NH. I am looking at getting the Diamond 15x10's and am wondering which backspacing you use as well as the center bore size. I have front WRX calipers on the car now, so it would have to clear those as well as my custom inverted coils which I don't think is going to be an issue. From measuring I am thinking a 6" or 5.5" backspace should work fine and reading through this thread it appears most go with a 6". Any help/insight would be great! Thanks a lot.

Terry

racerjon1 · 02-11-2011, 10:54 AM

iirc when I ordered mine I mentioned Patrick by name/the car and they just duplicated his order. I want to say it was 6.5" backspace though. (but man I have done a lot of info on wheels and it all drifts together)

Jon

BAN SUVS · 02-11-2011, 02:55 PM

Quote:

Originally Posted by Murphy2012

Hey everyone, I have been prepping a DSP 01 RS for local autocrossing and hillclimbs up here in NH. I am looking at getting the Diamond 15x10's and am wondering which backspacing you use as well as the center bore size. I have front WRX calipers on the car now, so it would have to clear those as well as my custom inverted coils which I don't think is going to be an issue. From measuring I am thinking a 6" or 5.5" backspace should work fine and reading through this thread it appears most go with a 6". Any help/insight would be great! Thanks a lot.

Terry

Searching here (possibly in this thread) may turn up the answer, but like Jon said just call them and tell them you have a DSP Subaru Impreza and you want what the other autocrossers got.

Murphy2012 · 02-16-2011, 04:23 PM

Thanks for the help. Believe me I spent some time searching and ultimately just called up Diamond Racing and told them I wanted Patrick's wheels but in a 6.5" BS to clear the WRX front calipers. I am really looking forward to this project after I spent the last 4/5 of the last seasons racing my WRX in SM class and last year racing a stock Solstice GXP (yes, its a very fun autox car) in Stock Class. Thanks again, good luck to all this year.

WastingTime · 02-24-2011, 04:04 AM

Quote:

Originally Posted by Storm

Look beyond 04-05 for 3.90 final drives.

Jay

Thanks Jay.. I'll probably look into that gearing change next year, doubt i'll have time to change it this year.

solo-x · 03-29-2011, 11:58 AM

Damn, DSP is looking mighty thin for the NJ Pro! Skeered of the Type-R are we?

Storm · 03-29-2011, 12:48 PM

They all got new magnets and registered for FSP....

My car is nowhere near ready to run.
Jay

racerjon1 · 03-29-2011, 12:55 PM

Quote:

Originally Posted by solo-x

Damn, DSP is looking mighty thin for the NJ Pro! Skeered of the Type-R are we?

Nah... just got better things to do than drive 1,400 mile round trip for a series I am not running in.

Rankins is flying up and co-driving in a stock-class 370z, I will either stay home and run/test for less cash, or go sit on my butt and watch Indy 500 qualifying.

WHAT · 04-06-2011, 09:42 AM

I am in for DSP for the NJ Pro... but it is my first Pro so I am not expecting much and to add to that I am still not 100% used to my car. I am getting there and felt really comfortable in it at an early season run at the Philly region Dover event.

Storm · 04-07-2011, 08:54 AM

I don't think my car will be ready for NJ..... Wouldn't be DSP anyway, but still. I'll keep plugging away and hope to make something happen this year.

Jay

WastingTime · 04-11-2011, 08:56 PM

Gentlemen of DSP... another small question for you. I read that I can bore my stock Throttle body within an inch to more or less port match. Am I allowed to use a WRX throttle body instead? If so, is it DSP legal to bore that as well?

BAN SUVS · 04-11-2011, 09:24 PM

As part of the intake manifold, the TB can be modified or replaced freely. Heck, you technically don't even have to have one- ITBs are legal.

racerjon1 · 04-11-2011, 09:57 PM

Quote:

Originally Posted by BAN SUVS

Heck, you technically don't even have to have one- ITBs are legal.

Why yes they are.

02-16-2011, 04:23 PM	#441
Murphy2012 Scooby Newbie Member#: 225326 Join Date: Sep 2009 Chapter/Region: NESIC Location: Belmont, NH	Thanks for the help. Believe me I spent some time searching and ultimately just called up Diamond Racing and told them I wanted Patrick's wheels but in a 6.5" BS to clear the WRX front calipers. I am really looking forward to this project after I spent the last 4/5 of the last seasons racing my WRX in SM class and last year racing a stock Solstice GXP (yes, its a very fun autox car) in Stock Class. Thanks again, good luck to all this year. Last edited by Murphy2012; 03-27-2011 at 04:44 PM.

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12-13-2010, 09:54 AM	#427
solo-x Scooby Specialist Member#: 37624 Join Date: May 2003 Chapter/Region: NESIC Location: Doesn't drive a scooby....	Power is no good if you can't put it to the ground... I doubt I'll see much improvement off the line though. That's a fundamental drive train layout issue.

02-09-2011, 11:30 PM	#429
WastingTime Scooby Specialist Member#: 181927 Join Date: Jun 2008 Chapter/Region: MAIC Location: Pittsburgh Vehicle: 99 RS - RBP 10 DSP	To give an update on my little car, I finally have almost everything figured out. I have a lot of parts to put on the car to get it to the limit of DSP but the main ones include Moore Performance NA Header Hydra 2.5RS EM OBX Front LSD Now my only problem will be my gearing, as some of you run into running the 15s. My first gear is short as fuq and in 2nd I'm almost always hitting rev limit. I realize I will gain a bit of gear with bumping up my red line, but that can only do some much. I have talked with some guys locally and they have suggested to jump up in tire size... 17s or possibly even 18s. Have any of you gone that big? If not, do you see any huge drawbacks if I can keep the tire/wheel weight down? Jarrett

02-10-2011, 03:15 AM	#430
madlib Scooby Newbie Member#: 16149 Join Date: Mar 2002 Vehicle: 2001 impreza 2.5RS blue	yeah...I run 18's. I chose 18's because the 285/30/18 is shorter than any wide size on 17's. Also, it is shorter than the OE size so that is also a plus. I tried 275/35/15 tires and I still prefer the 18's.

02-10-2011, 09:49 AM	#431
racerjon1 Scooby Specialist Member#: 43612 Join Date: Sep 2003 Location: Columbia, SC	I chose the 15s and then spin the engine to 7200. The problem is we can't really make any more power after 6550 or so, so it's just more of a "use it in a pinch" situation. There is a final drive ud/bd change I am considering to make the gear taller, and I have been on 17s/18s and it takes away a lot of what the car does right, especially the feel of the car and making it nimble and quick. What I want is a 255/35/15.. but I don't see that happening. In the end it's all a compromise (as with anything you do to your car) and you have to find which works best. Ideal world I would have a setup for the 18s and longer courses, and 15s for shorter courses, or 245-17s for airport transition courses, etc..

02-10-2011, 09:54 AM	#432
racerjon1 Scooby Specialist Member#: 43612 Join Date: Sep 2003 Location: Columbia, SC	Also... there are a couple things for us in the Street Perpared works. 1) They are working on approving the master cyl brace that attaches to the shock tower/keeps the firewall from flexing under braking. 2) I have written for a clarification that could have some interesting implications. SPAC hasn't voted on it yet and I feel the letter I did get is vague, so I will hold off on details for now.

02-10-2011, 04:07 PM	#435
WastingTime Scooby Specialist Member#: 181927 Join Date: Jun 2008 Chapter/Region: MAIC Location: Pittsburgh Vehicle: 99 RS - RBP 10 DSP	3.545 / 2.111 / 1.448 / 1.088 / 0.780 / 3.900FD - '96-'01 USDM Impreza L/OBS 3.545 / 2.111 / 1.448 / 1.088 / 0.825 / 3.900FD - '95 USDM Impreza 1.8L Those are only two 3.9 final drive ratios that I can find that aren't turbo'd. Can we ud/bd with an L or OBS? and would I have to swap the entire driveline??

02-10-2011, 04:53 PM	#436
Storm Scooby Guru Member#: 5218 Join Date: Mar 2001 Chapter/Region: MWSOC Location: SAUL'S Motorsports Vehicle: 96L Most Over- Developed Beater	Look beyond 04-05 for 3.90 final drives. Jay

02-10-2011, 06:36 PM	#437
BAN SUVS Scooby Specialist Member#: 28685 Join Date: Nov 2002 Location: Reno, Nevada Vehicle: 2004 FXT 4EAT very STi'd	My recollection is that all '02+ 2.5i/RS/TS have 3.90 except the '05 RS Sport/Pro package that came with the upgraded seats and stuff.

02-11-2011, 10:21 AM	#438
Murphy2012 Scooby Newbie Member#: 225326 Join Date: Sep 2009 Chapter/Region: NESIC Location: Belmont, NH	Hey everyone, I have been prepping a DSP 01 RS for local autocrossing and hillclimbs up here in NH. I am looking at getting the Diamond 15x10's and am wondering which backspacing you use as well as the center bore size. I have front WRX calipers on the car now, so it would have to clear those as well as my custom inverted coils which I don't think is going to be an issue. From measuring I am thinking a 6" or 5.5" backspace should work fine and reading through this thread it appears most go with a 6". Any help/insight would be great! Thanks a lot. Terry

02-11-2011, 10:54 AM	#439
racerjon1 Scooby Specialist Member#: 43612 Join Date: Sep 2003 Location: Columbia, SC	iirc when I ordered mine I mentioned Patrick by name/the car and they just duplicated his order. I want to say it was 6.5" backspace though. (but man I have done a lot of info on wheels and it all drifts together) Jon

03-29-2011, 11:58 AM	#443
solo-x Scooby Specialist Member#: 37624 Join Date: May 2003 Chapter/Region: NESIC Location: Doesn't drive a scooby....	Damn, DSP is looking mighty thin for the NJ Pro! Skeered of the Type-R are we?

03-29-2011, 12:48 PM	#444
Storm Scooby Guru Member#: 5218 Join Date: Mar 2001 Chapter/Region: MWSOC Location: SAUL'S Motorsports Vehicle: 96L Most Over- Developed Beater	They all got new magnets and registered for FSP.... My car is nowhere near ready to run. Jay

04-06-2011, 09:42 AM	#446
WHAT Scooby Specialist Member#: 19399 Join Date: May 2002 Chapter/Region: Tri-State Location: Lansdale Vehicle: 2013 LRPE M3/Touareg Orange/Black	I am in for DSP for the NJ Pro... but it is my first Pro so I am not expecting much and to add to that I am still not 100% used to my car. I am getting there and felt really comfortable in it at an early season run at the Philly region Dover event.

04-07-2011, 08:54 AM	#447
Storm Scooby Guru Member#: 5218 Join Date: Mar 2001 Chapter/Region: MWSOC Location: SAUL'S Motorsports Vehicle: 96L Most Over- Developed Beater	I don't think my car will be ready for NJ..... Wouldn't be DSP anyway, but still. I'll keep plugging away and hope to make something happen this year. Jay

04-11-2011, 08:56 PM	#448
WastingTime Scooby Specialist Member#: 181927 Join Date: Jun 2008 Chapter/Region: MAIC Location: Pittsburgh Vehicle: 99 RS - RBP 10 DSP	Gentlemen of DSP... another small question for you. I read that I can bore my stock Throttle body within an inch to more or less port match. Am I allowed to use a WRX throttle body instead? If so, is it DSP legal to bore that as well?

04-11-2011, 09:24 PM	#449
BAN SUVS Scooby Specialist Member#: 28685 Join Date: Nov 2002 Location: Reno, Nevada Vehicle: 2004 FXT 4EAT very STi'd	As part of the intake manifold, the TB can be modified or replaced freely. Heck, you technically don't even have to have one- ITBs are legal.