Smaller SC pulley - LotusTalk - The Lotus Cars Community
Reply
 
LinkBack Thread Tools Display Modes
post #1 of 25 (permalink) Old 01-26-2015, 02:21 PM Thread Starter
Registered User
 
Join Date: Mar 2014
Location: Bryne Norway
Posts: 87
Smaller SC pulley

If i was to go from the std 3,3" pully, and down to a 3,1" , do i need a new belt for this, or will the tensioner pick up the extra play?
T.Lund is offline  
Sponsored Links
Advertisement
 
post #2 of 25 (permalink) Old 01-26-2015, 08:28 PM
Registered User
 
forkmeupscotty's Avatar
 
Join Date: Nov 2009
Location: Mountain View
Posts: 2,089
I could be wrong, but judging from the fact that the vendors are listing different belt for smaller pulley compared to the stock replacements, I think the tensioner isn't able to handle it and you need a different one.

Another thing to consider is whether the ECU will adjust accordingly without freaking out. It might throw a code later when it tries to compensate for increased air, and it ends up being out of its expected range.

Someone better educated should chime in...

2001 2JZ-GE
2008 N54B30
2008 2ZZ-GZE
2015 N63B44O1

http://www.youtube.com/forkmeupscotty
forkmeupscotty is offline  
post #3 of 25 (permalink) Old 01-26-2015, 09:26 PM
The Enforcer
 
oldmansan's Avatar
 
Join Date: Mar 2011
Location: Los Alamitos, CA
Posts: 6,471
In my experience I went to a smaller pulley, ECU tune, larger injectors and even a different airbox (Cup). I have the Blade 300 kit.

Send Phil at BOE an email or PM. He'll give you good advice. He's the type that will tell you you're wasting your money on something if it's not needed for your goals.

San

#8 Metric Allen Key, Plastic Carpet Buttons, Never Been on Fire
oldmansan is offline  
 
post #4 of 25 (permalink) Old 01-26-2015, 09:29 PM
Monaco Dreamin'
 
BCspeed34's Avatar
 
Join Date: Oct 2012
Location: Bellevue, WA
Posts: 459
I'm using the stock sized belt on a 3" pulley. No issues so far.

01 Mitsubishi Lancer Evo 6 TME
93 Lancia Delta Integrale Evo 2
65 Ford Mustang 289 5spd
BCspeed34 is offline  
post #5 of 25 (permalink) Old 01-27-2015, 10:42 AM Thread Starter
Registered User
 
Join Date: Mar 2014
Location: Bryne Norway
Posts: 87
Elise parts sells smaller pulleys, but only listing standard belt, that is why i am asking. I got an 2007 Exige S with a full 2bular exhaust (de-kat), TRD airbox, larger IC, and a Komo-tec S270 tune in it, and my guy that dynoed it, said that it should not have any problem handling a bit smaller SC pulley.
T.Lund is offline  
post #6 of 25 (permalink) Old 01-31-2015, 11:55 AM
Registered User
 
Motard's Avatar
 
Join Date: Feb 2010
Location: Knoxville, Tennessee
Posts: 1,445
Garage
I have 2.9 pulley

I went with Gates
Micro- V AT
K060755
6PK1918

13/16" X 76" OC
20mm X 1932mm OC

Seems to be up to the task.

L O T U S
Motard is offline  
post #7 of 25 (permalink) Old 01-31-2015, 12:04 PM
Registered User
 
sleepe's Avatar
 
Join Date: Jan 2007
Location: Rehoboth Beach, Delaware
Posts: 3,025
I swapped the stock 3.4" steel for a 3.0" AL pulley on my S240 and went with a smaller belt for good measure. It took a number of trips for the ECU to settle down. The supercharged engine is unchanged other than the pulley. I'm waiting for BOE to come out with a power package for the "black face" speedos.

-Robert

2006 Elise ST (someone else has it now . . . )
2008 Exige S240 ST
sleepe is offline  
post #8 of 25 (permalink) Old 01-31-2015, 12:13 PM
Registered User
 
sturgeongeneral's Avatar
 
Join Date: May 2011
Location: Sacramento, Ca.
Posts: 5,176
The biggest mistakes made are adding bolt on upgrades and not adding a tune. You make a little more HP but are leaving so much in performance and optimization on the table.


Quote:
Originally Posted by forkmeupscotty View Post
I could be wrong, but judging from the fact that the vendors are listing different belt for smaller pulley compared to the stock replacements, I think the tensioner isn't able to handle it and you need a different one.

Another thing to consider is whether the ECU will adjust accordingly without freaking out. It might throw a code later when it tries to compensate for increased air, and it ends up being out of its expected range.

Someone better educated should chime in...

05 Elise
56 VW Dune Buggy

GGLC-Sacramento Chapter Membership and Recruiting
[email protected]
sturgeongeneral is offline  
post #9 of 25 (permalink) Old 01-31-2015, 12:39 PM
Registered User
 
Motard's Avatar
 
Join Date: Feb 2010
Location: Knoxville, Tennessee
Posts: 1,445
Garage
Wow...

I am really starting to feel for you 08 guys... I have had Torque 300 for more than a year or so. I does honestly rock the free world.

L O T U S

Last edited by Motard; 02-01-2015 at 06:18 AM.
Motard is offline  
post #10 of 25 (permalink) Old 01-31-2015, 08:53 PM
Registered User
 
ArizonaExige's Avatar
 
Join Date: Sep 2011
Posts: 321
Quote:
Originally Posted by Motard View Post
Wow...I am really starting to feel for you 08 guys... I have had Torque 300 for more than a year or so.
Ahhhh........you have no idea how painful it's been waiting for the Torque 300 for my '08 black dash S240.

08 Exige S240 - Chrome Orange
ArizonaExige is offline  
post #11 of 25 (permalink) Old 02-01-2015, 06:14 AM
Registered User
 
Motard's Avatar
 
Join Date: Feb 2010
Location: Knoxville, Tennessee
Posts: 1,445
Garage
It's hard not to ask the technical question of what the actual ECU difference is? I would be almost wanting to buy a 07 ECU just for that tune. If I had a 08...

I used to rub it in cause I figured like the Russians developing nuclear weapons in the 1950s you would have the same thing in months.

approx 280whp with oem SC and engine is no joke FUN...

L O T U S
Motard is offline  
post #12 of 25 (permalink) Old 02-01-2015, 07:14 AM
Registered User
 
Join Date: May 2012
Posts: 70
Been running the Torque 300 too since last summer with a 2.9"
Soon to put on PPE header - that I am wondering if I will need a re-tune. I should have put everything in one shot
clarionguy is offline  
post #13 of 25 (permalink) Old 02-01-2015, 08:03 AM
Registered User
 
Gunpilot's Avatar
 
Join Date: Jun 2012
Location: Enterprise AL
Posts: 4,098
Email Thomas at RLS, he sells the pulleys and should know.

2012 Evora 2+0 IPS.
2007 Exige mental track toy.
2005 Elise.
1982 Brunette.

"Listen up, I ain't Captain Walker. I'm the guy who carries Mr. Dead in his pocket."

"CHARLIE DON'T SURF"
Gunpilot is offline  
post #14 of 25 (permalink) Old 02-01-2015, 08:11 AM
Me!
6.94915254 lbs/hp
 
Me!'s Avatar
 
Join Date: Aug 2006
Location: Nashville
Posts: 1,731
Quote:
Originally Posted by Motard View Post
Wow...

I am really starting to feel for you 08 guys... I have had Torque 300 for more than a year or so. I does honestly rock the free world.
+1 My car has been running perfectly for over a year now! ...And it moves faster than stink, having no problem keeping up with my friends slightly modified C5 Z06 in a straight line!

2007 Storm Titanium Exige S w/ sunvisor delete
Me! is offline  
post #15 of 25 (permalink) Old 02-01-2015, 09:37 AM
Registered User
 
Motard's Avatar
 
Join Date: Feb 2010
Location: Knoxville, Tennessee
Posts: 1,445
Garage
I installed my 2bular header after torque 300 install. I asked Phil if I needed to have the tune tweaked. He said not necessary.

I really need to start turning a wrench and get my machine back on the road and maybe a new dyno run.

I was at 271whp prior to header install. I guess you would expect approx 10hp from header more or less?

L O T U S
Motard is offline  
post #16 of 25 (permalink) Old 02-01-2015, 08:31 PM
shay2nak
 
shay2nak's Avatar
 
Join Date: Dec 2003
Location: Calipornia
Posts: 24,900
Quote:
Originally Posted by Motard View Post
I installed my 2bular header after torque 300 install. I asked Phil if I needed to have the tune tweaked. He said not necessary.

I really need to start turning a wrench and get my machine back on the road and maybe a new dyno run.

I was at 271whp prior to header install. I guess you would expect approx 10hp from header more or less?
at least 15whp. IIRC, with a decat I gained 20-25whp.

** save ~10 lbs gain 1 hp ** EQ: Y=(190*X) / (1984-X) where Y is (HP) and X is (lbs)

'07 Lotus Exige S310


WTC 2
shay2nak is offline  
post #17 of 25 (permalink) Old 02-03-2015, 01:01 PM Thread Starter
Registered User
 
Join Date: Mar 2014
Location: Bryne Norway
Posts: 87
Quote:
Originally Posted by shay2nak View Post
at least 15whp. IIRC, with a decat I gained 20-25whp.
I got 22 hp to the wheels extra, with the 2bular headers, and de-kat muffler.
T.Lund is offline  
post #18 of 25 (permalink) Old 02-03-2015, 01:24 PM
purveyor of lightness
 
darkSol's Avatar
 
Join Date: Feb 2004
Location: Leawood, KS
Posts: 4,059
Garage
I am the same boat kinda. I'm swapping my old 70mm (2.75") pulley down to a 65mm one (2.55") on my REV400. According to the math I'll need 8.3mm shorter belt length (190 degree pulley arc). I'm going to try and keep my existing belt and see...

.
d.a..v...i....d

David Thomas Stewart - [email protected]
2005 Midnight Silver Lotus Elise (www.darksol.com) 388hp (342whp) BOE RevX 1736lbs.
2018 Midnight Silver Tesla Model 3 Performance
2016 Machine Gray Metallic Mazda CX-9
darkSol is offline  
post #19 of 25 (permalink) Old 02-03-2015, 06:07 PM
Registered User
 
Motard's Avatar
 
Join Date: Feb 2010
Location: Knoxville, Tennessee
Posts: 1,445
Garage
Didn't I actually list the belt to use in post #6 ? Assuming Gates is good enough brand?

I am just messing, but when I went to 2.9" I did my homework and that belt is what was indicated. I can handle feedback if the answer is more of " it depends" than I am giving it.

L O T U S
Motard is offline  
post #20 of 25 (permalink) Old 02-03-2015, 08:05 PM
shay2nak
 
shay2nak's Avatar
 
Join Date: Dec 2003
Location: Calipornia
Posts: 24,900
Quote:
Originally Posted by T.Lund View Post
I got 22 hp to the wheels extra, with the 2bular headers, and de-kat muffler.
Sounds right. Now I remember, with the sport cat it was +15 and the decat gave me an additional +10whp.

** save ~10 lbs gain 1 hp ** EQ: Y=(190*X) / (1984-X) where Y is (HP) and X is (lbs)

'07 Lotus Exige S310


WTC 2
shay2nak is offline  
Sponsored Links
Advertisement
 
Reply

  LotusTalk - The Lotus Cars Community > Lotus Discussions > Lotus Exige

Quick Reply
Message:
Options

Register Now



In order to be able to post messages on the LotusTalk - The Lotus Cars Community forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.

User Name:
Password
Please enter a password for your user account. Note that passwords are case-sensitive.

Password:


Confirm Password:
Email Address
Please enter a valid email address for yourself.

Email Address:
OR

Log-in











Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page
Display Modes
Linear Mode Linear Mode



Posting Rules  
You may post new threads
You may post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On

 
For the best viewing experience please update your browser to Google Chrome