+4hp w/ Arqray dual muffler SS exhaust: dyno results - LotusTalk

Modern Wedgie · 06-27-2005, 09:35 AM

Hey guys,

I just took my car for some exercise on the dyno. Came up with some pretty cool results. Below is a copy of one of the printouts. I'll have more info later.

Test conditions:

Stock Exhaust:
1lapdubin1_439.drf: 6/21/2005 6:32:52 PM 89.56 °F, 28.92 in-Hg, SAE: 1.04
1lapdubin1_440.drf: 6/21/2005 6:33:19 PM 89.39 °F, 28.92 in-Hg, SAE: 1.04
1lapdubin1_438.drf: 6/21/2005 6:32:20 PM 89.71 °F, 28.91 in-Hg, SAE: 1.04

Arqray exhaust:
1lapdubin1_436.drf: 6/21/2005 5:04:00 PM 93.29 °F, 28.94 in-Hg, SAE: 1.04
1lapdubin1_437.drf: 6/21/2005 5:04:31 PM 93.49 °F, 28.92 in-Hg, SAE: 1.05
1lapdubin1_435.drf: 6/21/2005 5:03:31 PM 93.01 °F, 28.94 in-Hg, SAE: 1.04

Paul MD · 06-27-2005, 09:38 AM

"Very interesteeeing Meeeester Bond"

Now please go buy an ITG and put that debate to rest too!!!

Dro · 06-27-2005, 09:46 AM

Cool! I have that exhaust too! Thanks for posting the dyno results.

darkSol · 06-27-2005, 09:52 AM

Quote:

Originally Posted by Modern Wedgie

Hey guys,

I just took my car for some exercise on the dyno. Came up with some pretty cool results. Below is a copy of one of the printouts. I'll have more info later.

Nice results Lillie!... can you get a printout with RPM's and with better smoothing? Someone lend her a QS2 to test!

Modern Wedgie · 06-27-2005, 09:55 AM

Car on dyno w/ Arqray exhaust. Isn't she so pretty

ekological · 06-27-2005, 10:02 AM

The car was modded from aftermarket back to stock? That would be what is suggested by the time stamps in the dyno results.

Ancient Wedgie · 06-27-2005, 10:03 AM

Quote:

Originally Posted by Modern Wedgie

Car on dyno w/ Arqray exhaust. Isn't she so pretty

Well, of course!
After you color shifted to make her appear Lightning Yellow, she surely looks spectacular.

jac · 06-27-2005, 10:03 AM

Car looks great. Still no 2nd stripe?

Modern Wedgie · 06-27-2005, 10:04 AM

Quote:

Originally Posted by darkSol

Nice results Lillie!... can you get a printout with RPM's and with better smoothing? Someone lend her a QS2 to test!

I'm trying to get an RPM printout. As soon as I do I will post the results. The test was done in 4th gear, so you can manually do the conversion, and we all know where 6K happens

I'll post the best runs from each exhaust alone too so you can see it better.

Too bad I dont have my own dyno program or I'd have all sorts of cool graphs for you. Remember I used to be a scientist, so creating useful and pretty graphs is my specialty

Paul MD · 06-27-2005, 10:04 AM

Quote:

Originally Posted by ekological

The car was modded from aftermarket back to stock? That would be what is suggested by the time stamps in the dyno results.

Dope... she had it in reverse gear

Modern Wedgie · 06-27-2005, 10:11 AM

Quote:

Originally Posted by ekological

The car was modded from aftermarket back to stock? That would be what is suggested by the time stamps in the dyno results.

Yes, that is correct. I am running the stock exhaust on the car right now. It looks very pathetic, yet is proving a funny point. When people see it, I ask them not to laugh...its a stock exhaust system. When they realize that is the POS they have on their car, it helps create more sales

I plan to put the Arqray back on next week.

P.S. Oops, instead of hitting quote, I hit edit and originally placed this message in ekological's post. I have to be careful with my moderator abilities. I swear I didnt change any of his post if you see the edited by Modern Wedgie under his post.

TimMullen · 06-27-2005, 10:18 AM

What are you attaching the tie downs to?

Modern Wedgie · 06-27-2005, 11:21 AM

Quote:

Originally Posted by TimMullen

What are you attaching the tie downs to?

The picture is funny. It looks like the tie downs are attached to the diffuser or nothing at all

He tied around the suspension arms without any problems.

TurboXS_Nathan · 06-27-2005, 11:22 AM

Thanks for posting the results. I especially appreciate the fact that you posted multiple runs for each exhaust system as well as the SAE and weather center data.

About the only other additional information that someone could ask for would be ignition timing curves from a data-logger and an AFR plot from each run.

-Nathan

Modern Wedgie · 06-27-2005, 11:30 AM

I dont have the torque curves in a digital file yet. I'll have them as soon as possible. For the meantime, here are the maximum values:

Stock Exhaust:
1lapdubin1_439.drf: Max Torque: 116.74
1lapdubin1_440.drf: Max Torque: 116.55
1lapdubin1_438.drf: Max Torque: 115.93

Arqray exhaust:
1lapdubin1_436.drf: Max Torque: 120.53
1lapdubin1_437.drf: Max Torque: 119.40
1lapdubin1_435.drf: Max Torque: 119.65

scottyb · 06-27-2005, 12:11 PM

Lillie,

How dificult was it to replace the exhaust? Is there any welding needed? How much loader is it over stock? Will it intefere with hearing the stereo?

Just curious.

shay2nak · 06-27-2005, 02:04 PM

cool! I hope the gains are the same for the Ti dual grill exiting exhaust also. I'm sure you'd gain a little more if you had the sport cat also.

fitfan · 06-27-2005, 02:09 PM

Quote:

Originally Posted by Modern Wedgie

The picture is funny. It looks like the tie downs are attached to the diffuser or nothing at all

He tied around the suspension arms without any problems.

??? i thought that was a big no no?

Modern Wedgie · 06-27-2005, 02:49 PM

You might be right. People say not to do that when towing the vehicle. However, I dont know any other option on the dyno. It has to be strapped down. I dont see any damage. If anyone knows another way I'd like to hear it.

Modern Wedgie · 06-27-2005, 02:52 PM

Quote:

Originally Posted by scottyb

Lillie,

How dificult was it to replace the exhaust? Is there any welding needed? How much loader is it over stock? Will it intefere with hearing the stereo?

Just curious.

The stock exhaust comes off, and the Arqray bolts straight on. Very easy. No welding necessary. I'm not sure what the weight savings is from stock, but it is lighter. The exhaust note is beautiful. Under normal cruising you dont really hear it. No drone. But when you're on the gas, it sounds real perty. It even girgles

I miss it tremendously. I must get it back on soon

06-27-2005, 09:35 AM	#1 (permalink)
Modern Wedgie elise groupie Join Date: Mar 2003 Location: Geneva, Switzerland Posts: 2,743	+4hp w/ Arqray dual muffler SS exhaust: dyno results Hey guys, I just took my car for some exercise on the dyno. Came up with some pretty cool results. Below is a copy of one of the printouts. I'll have more info later. Test conditions: Stock Exhaust: 1lapdubin1_439.drf: 6/21/2005 6:32:52 PM 89.56 °F, 28.92 in-Hg, SAE: 1.04 1lapdubin1_440.drf: 6/21/2005 6:33:19 PM 89.39 °F, 28.92 in-Hg, SAE: 1.04 1lapdubin1_438.drf: 6/21/2005 6:32:20 PM 89.71 °F, 28.91 in-Hg, SAE: 1.04 Arqray exhaust: 1lapdubin1_436.drf: 6/21/2005 5:04:00 PM 93.29 °F, 28.94 in-Hg, SAE: 1.04 1lapdubin1_437.drf: 6/21/2005 5:04:31 PM 93.49 °F, 28.92 in-Hg, SAE: 1.05 1lapdubin1_435.drf: 6/21/2005 5:03:31 PM 93.01 °F, 28.94 in-Hg, SAE: 1.04 Attached Images __________________ Long live the

06-27-2005, 09:38 AM	#2 (permalink)
Paul MD 2nd Timer Join Date: Aug 2003 Location: Back in Sunny Maryland Posts: 732	"Very interesteeeing Meeeester Bond" Now please go buy an ITG and put that debate to rest too!!! Last edited by Paul MD : 06-27-2005 at 09:54 AM.

06-27-2005, 09:55 AM	#5 (permalink)
Modern Wedgie elise groupie Join Date: Mar 2003 Location: Geneva, Switzerland Posts: 2,743	Car on dyno w/ Arqray exhaust. Isn't she so pretty Attached Images __________________ Long live the

06-27-2005, 10:02 AM	#6 (permalink)
ekological Registered User Join Date: Jan 2004 Location: Brooklyn, NY Posts: 1,548 Images: 13	The car was modded from aftermarket back to stock? That would be what is suggested by the time stamps in the dyno results. Last edited by Modern Wedgie : 06-27-2005 at 10:08 AM.

06-27-2005, 10:18 AM	#12 (permalink)
TimMullen Moderator Join Date: Jun 2003 Location: Chantilly, VA Posts: 11,382 Images: 19	What are you attaching the tie downs to? __________________ Tim Mullen --- There is no such thing as Touring suspension or Touring wheels. I love being married. It's so great to find that one person that you want to annoy for the rest of your life. - Rita Rudner Chantilly, VA http://members.cox.net/elans4/ 05 Lotus Elise - Chrome Orange - No Touring - No LSS - No Hardtop - Lotus Driving Lights - Lotus "Chin Guards" - plain and simple. 94 Miata R Package - Black 72 Lotus Elan Sprint - Colorado Orange/Cirrus White

06-27-2005, 09:46 AM	#3 (permalink)
Dro The Original Dro Join Date: Feb 2005 Location: Centreville, VA Posts: 838	Cool! I have that exhaust too! Thanks for posting the dyno results.

06-27-2005, 10:03 AM	#8 (permalink)
jac Registered User Join Date: Aug 2004 Location: back in upstate ny Posts: 869	Car looks great. Still no 2nd stripe?

06-27-2005, 11:22 AM	#14 (permalink)
TurboXS_Nathan Registered User Join Date: Jun 2005 Posts: 217	Thanks for posting the results. I especially appreciate the fact that you posted multiple runs for each exhaust system as well as the SAE and weather center data. About the only other additional information that someone could ask for would be ignition timing curves from a data-logger and an AFR plot from each run. -Nathan __________________ -Nathan www.turboxs.com

06-27-2005, 11:30 AM	#15 (permalink)
Modern Wedgie elise groupie Join Date: Mar 2003 Location: Geneva, Switzerland Posts: 2,743	I dont have the torque curves in a digital file yet. I'll have them as soon as possible. For the meantime, here are the maximum values: Stock Exhaust: 1lapdubin1_439.drf: Max Torque: 116.74 1lapdubin1_440.drf: Max Torque: 116.55 1lapdubin1_438.drf: Max Torque: 115.93 Arqray exhaust: 1lapdubin1_436.drf: Max Torque: 120.53 1lapdubin1_437.drf: Max Torque: 119.40 1lapdubin1_435.drf: Max Torque: 119.65 __________________ Long live the

06-27-2005, 12:11 PM	#16 (permalink)
scottyb Registered User Join Date: Dec 2004 Posts: 3,683	Lillie, How dificult was it to replace the exhaust? Is there any welding needed? How much loader is it over stock? Will it intefere with hearing the stereo? Just curious.

06-27-2005, 02:04 PM	#17 (permalink)
shay2nak I <3 chicken, I <3 liver Join Date: Dec 2003 Location: Land of da 1000 Oaks, CA Posts: 15,053	cool! I hope the gains are the same for the Ti dual grill exiting exhaust also. I'm sure you'd gain a little more if you had the sport cat also. __________________ save ~10 lbs gain 1 hp EQ: Y=(190X) / (1984-X) where Y is (HP) and X is (lbs) '07 EXIGE S * MY CAR ** VIDEOS! '08 ACURA TSX 6-speed http://www.makeNYNYagain.com

06-27-2005, 02:49 PM	#19 (permalink)
Modern Wedgie elise groupie Join Date: Mar 2003 Location: Geneva, Switzerland Posts: 2,743	You might be right. People say not to do that when towing the vehicle. However, I dont know any other option on the dyno. It has to be strapped down. I dont see any damage. If anyone knows another way I'd like to hear it. __________________ Long live the

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