Really Light Stuff - Supercharger Pulleys - LotusTalk

Thomasio · 11-03-2009, 04:12 PM

Since the other thread has been deleted, I will be recreating the thread here. Pardon the work in progress...

RLS Supercharger Overdrive Pulleys

Available in 3.1", 3.0", 2.9", and 2.8" diameters.

We recommend engine tuning for anything beyond the 3.1" pulley. Make sure you have a wideband AFR to keep an eye on things.

$98 plus shipping.

LotusLaw · 11-03-2009, 07:11 PM

What is the stock diameter on an 08 s240?

how noticeable is the change to a 3.1"? how much more boost? HP?

Thomasio · 11-03-2009, 08:40 PM

Quote:

Originally Posted by LotusLaw

What is the stock diameter on an 08 s240?

how noticeable is the change to a 3.1"? how much more boost? HP?

Stock on '07 Exige S is 3.28".

My car already had an RLS Intercooler when I switched form 3.28" to 3.1". There was about a 0.5 psi increase in boost, about 14 HP. The dyno is posted on LT in one of the intercooler threads. The intercooler was about a 14 HP increase over the stock intercooler, and the pulley was another 12 HP on top of that. These #'s are from memory, I'll try to find the dyno in the other thread and link to it.

I have not dyno'd stock intercooler + 3.1" pulle.

Stock 2007 Exige S, plus RLS Intercooler: +6.5% horsepower gain. Stock 2007 Exige S, plus RLS Intercooler, plus RLS 3.1" Pully: +14.5% horsepower total.

Yes, it was noticeable. Enough to make me smile.

shay2nak · 11-04-2009, 09:13 AM

found 'em.
top: RLS intercooler only
bottom: RLS intercooler and 3.1 (IIRC) pulley.

shay2nak · 11-04-2009, 09:15 AM

how long does it take to install a pulley?

Dave · 11-04-2009, 10:24 AM

Quote:

Originally Posted by shay2nak

how long does it take to install a pulley?

Less than an hour, I can do one easily now in 45 minutes.

Jack car
Remove RR wheel and liner
Remove pulley bolt (note remove bolt before belt or it will turn the shaft)
Pry tensioner and slide belt off pulley
Remove/replace pulley (will take a few extra minutes with a stock as it's on tight)
Reverse order.

I have used Thomasio's 3.1 and 3.0 on the 240...they are good quality and a substantial rotational mass savings.

onthebeach · 11-04-2009, 10:32 AM

Thomasio, where do you measure the diam of the pulley? In the middle?

Westrock · 11-05-2009, 12:37 AM

Quote:

Originally Posted by Dave

Less than an hour, I can do one easily now in 45 minutes.

Haha! Probably not on your first time though

Hell it took me longer then that just to figure out how the tensioner worked! But now that I know how everything works, ya you can change a belt out in like 15-20 minutes....taking the wheel off & on probably takes most of the time.

Thomasio · 11-05-2009, 06:13 AM

Quote:

Originally Posted by shay2nak

found 'em.
top: RLS intercooler only
bottom: RLS intercooler and 3.1 (IIRC) pulley.

Good find! I was looking everywhere, almost had to get out my old hard drive.

Thomasio · 11-05-2009, 06:16 AM

Quote:

Originally Posted by Westrock

Haha! Probably not on your first time though

Hell it took me longer then that just to figure out how the tensioner worked! But now that I know how everything works, ya you can change a belt out in like 15-20 minutes....taking the wheel off & on probably takes most of the time.

You can do it without removing the wheel & liner. I always use a helper to put torque on the tensioner to loosen the belt. BE CAUTIOUS here... if you strip the six point hex casting on the tensioner, you are in for trouble.

HKFEVER · 11-05-2009, 07:14 AM

So, I should have 270hp with RLS cooler + 3.1" pulley?

Without ECU retune?

Thomasio · 11-05-2009, 09:04 AM

Quote:

Originally Posted by HKFEVER

So, I should have 270hp with RLS cooler + 3.1" pulley?

Without ECU retune?

The original Exige S does fine with the 3.1" without a tune, and there are people running the 3.1" on the S 240 without a tune. I recommend carefully monitoring your wideband AFR to make sure you aren't getting into trouble.

It is easy enough for you to try the 3.1" and dyno it...

Thomasio · 11-05-2009, 09:04 AM

Over the last couple of weeks certain pulleys were out of stock, but 2.8", 2.9", 3.0", and 3.1" pulleys are all back in stock now.

LotusLaw · 11-05-2009, 06:11 PM

Quote:

Originally Posted by Thomasio

Stock on '07 Exige S is 3.28".

My car already had an RLS Intercooler when I switched form 3.28" to 3.1". There was about a 0.5 psi increase in boost, about 14 HP. The dyno is posted on LT in one of the intercooler threads. The intercooler was about a 14 HP increase over the stock intercooler, and the pulley was another 12 HP on top of that. These #'s are from memory, I'll try to find the dyno in the other thread and link to it.

I have not dyno'd stock intercooler + 3.1" pulle.

Stock 2007 Exige S, plus RLS Intercooler: +6.5% horsepower gain. Stock 2007 Exige S, plus RLS Intercooler, plus RLS 3.1" Pully: +14.5% horsepower total.

Yes, it was noticeable. Enough to make me smile.

Whats the stock diameter on the 08 s 240?

sleepe · 11-05-2009, 07:40 PM

what is the diameter of the VF2 SC kit pulley?
-Robert

Do you know the weight saving between the oem mp62 steel pulley and rls if we say the size is 3.0?

-Robert

EricH · 11-05-2009, 08:00 PM

Quote:

Originally Posted by LotusLaw

Whats the stock diameter on the 08 s 240?

Same as the '07 S.

Thomasio · 11-06-2009, 01:07 AM

Quote:

Originally Posted by sleepe

what is the diameter of the VF2 SC kit pulley?
-Robert

Do you know the weight saving between the oem mp62 steel pulley and rls if we say the size is 3.0?

-Robert

Argh, it was in the original thread that got "lost." I think it was on the order of 2/3 lb, but it could have been less.

shay2nak · 11-07-2009, 11:54 AM

Quote:

Originally Posted by sleepe

what is the diameter of the VF2 SC kit pulley?
-Robert

VF2 is 2.9" IIRC.

Thomasio · 11-09-2009, 01:37 PM

2.8", 2.9", 3.0" and 3.1" pulleys are all in stock now. Other sizes are available, PM me.

HKFEVER · 11-14-2009, 07:54 AM

Quote:

Originally Posted by Dave

Remove pulley bolt (note remove bolt before belt or it will turn the shaft)
.

Which shaft do you mean?

11-03-2009, 04:12 PM	#1 (permalink)
Thomasio really light stuff Join Date: Jul 2003 Posts: 3,503	Really Light Stuff - Supercharger Pulleys Since the other thread has been deleted, I will be recreating the thread here. Pardon the work in progress... RLS Supercharger Overdrive Pulleys Available in 3.1", 3.0", 2.9", and 2.8" diameters. We recommend engine tuning for anything beyond the 3.1" pulley. Make sure you have a wideband AFR to keep an eye on things. $98 plus shipping. Attached Images __________________ 07 SY Exige S Really Light Stuff Intercooler . RLS Tubes . RLS Water/Methanol Injection . RLS 3.0" Pulley . RLS Wing Plates . RLS CF Window Panel Last edited by Mr. Know : 11-05-2009 at 11:16 PM.

11-04-2009, 09:13 AM	#4 (permalink)
shay2nak I <3 chicken, I <3 liver Join Date: Dec 2003 Location: Land of da 1000 Oaks, CA Posts: 15,053	found 'em. top: RLS intercooler only bottom: RLS intercooler and 3.1 (IIRC) pulley. Attached Images __________________ 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

11-04-2009, 09:15 AM	#5 (permalink)
shay2nak I <3 chicken, I <3 liver Join Date: Dec 2003 Location: Land of da 1000 Oaks, CA Posts: 15,053	how long does it take to install a pulley? __________________ 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

11-05-2009, 07:14 AM	#11 (permalink)
HKFEVER Registered User Join Date: Jan 2009 Location: Hong Kong Posts: 314	So, I should have 270hp with RLS cooler + 3.1" pulley? Without ECU retune? __________________ 2008 Exige S Sport in HK (S240) almost stock.

11-05-2009, 09:04 AM	#13 (permalink)
Thomasio really light stuff Join Date: Jul 2003 Posts: 3,503	Over the last couple of weeks certain pulleys were out of stock, but 2.8", 2.9", 3.0", and 3.1" pulleys are all back in stock now. __________________ 07 SY Exige S Really Light Stuff Intercooler . RLS Tubes . RLS Water/Methanol Injection . RLS 3.0" Pulley . RLS Wing Plates . RLS CF Window Panel

11-03-2009, 07:11 PM	#2 (permalink)
LotusLaw Registered User Join Date: Jul 2009 Location: NJ/Miami Beach Posts: 21	What is the stock diameter on an 08 s240? how noticeable is the change to a 3.1"? how much more boost? HP?

11-04-2009, 10:32 AM	#7 (permalink)
onthebeach Registered User Join Date: May 2009 Posts: 26	Thomasio, where do you measure the diam of the pulley? In the middle?

11-05-2009, 07:40 PM	#15 (permalink)
sleepe Registered User Join Date: Jan 2007 Location: Rehoboth Beach, DE Posts: 1,049	what is the diameter of the VF2 SC kit pulley? -Robert Do you know the weight saving between the oem mp62 steel pulley and rls if we say the size is 3.0? -Robert __________________ Elise'06ST:RAC/r888-Ultradiscs-Larini 8"-Braille-Saikou Michi cans-Nitron sportpro-RTVbrace-widened undertrays-manly's motor inserts-FF engine damper VF2

11-09-2009, 01:37 PM	#19 (permalink)
Thomasio really light stuff Join Date: Jul 2003 Posts: 3,503	2.8", 2.9", 3.0" and 3.1" pulleys are all in stock now. Other sizes are available, PM me. __________________ 07 SY Exige S Really Light Stuff Intercooler . RLS Tubes . RLS Water/Methanol Injection . RLS 3.0" Pulley . RLS Wing Plates . RLS CF Window Panel

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