03-31-2013, 12:20 PM
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#1
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I am my own mechanic....
Join Date: Feb 2013
Location: Salt Lake City, UT
Posts: 3,432
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First step to increase low-end torque?
What's first? My B'ster is stock. 3.2.
It is like a rocket over 3k but it would be nice to get more power off the line or at lower speeds.
__________________
'04 Boxster S 50 Jahre 550 Spyder Anniversary Special Edition, 851 of 1953, 6-sp, IMS/RMS, GT Metallic silver, cocoa brown leather SOLD to member Broken Linkage.
'08 VW Touareg T-3 wife's car
'13 F150 Super Crew long bed 4x4 w/ Ego Boost
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03-31-2013, 12:28 PM
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#2
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Registered User
Join Date: Jun 2012
Location: Frederick MD
Posts: 658
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Quote:
Originally Posted by Timco
What's first? My B'ster is stock. 3.2.
It is like a rocket over 3k but it would be nice to get more power off the line or at lower speeds.
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Interesting. I have an 02 S, and I think it has one of the flattest power bands of any car I've driven. If anything, I would like more poke in the upper rev range. Yours becomes a rocket above 3k huh. Mine is flat from ~1800 all the way up with a very slight "step" at around 4500rpm. It's plenty fast, it just doesn't feel fast until you look at the speedo...
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03-31-2013, 01:30 PM
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#3
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I am my own mechanic....
Join Date: Feb 2013
Location: Salt Lake City, UT
Posts: 3,432
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Quote:
Originally Posted by shadrach74
Interesting. I have an 02 S, and I think it has one of the flattest power bands of any car I've driven. If anything, I would like more poke in the upper rev range. Yours becomes a rocket above 3k huh. Mine is flat from ~1800 all the way up with a very slight "step" at around 4500rpm. It's plenty fast, it just doesn't feel fast until you look at the speedo...
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60-120 is WAY faster than 0-60. I would say it has twice the pickup over 3k than below. 1st does 45 or so, 2nd is like 75, and 3rd is well over 100. 2nd & 3rd are much faster than 1st.
__________________
'04 Boxster S 50 Jahre 550 Spyder Anniversary Special Edition, 851 of 1953, 6-sp, IMS/RMS, GT Metallic silver, cocoa brown leather SOLD to member Broken Linkage.
'08 VW Touareg T-3 wife's car
'13 F150 Super Crew long bed 4x4 w/ Ego Boost
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03-31-2013, 03:20 PM
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#4
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Registered User
Join Date: Nov 2008
Location: Massachusetts
Posts: 4,810
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Exhaust, exhaust, exhaust !!
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Don't worry … I've got the microfilm.
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03-31-2013, 04:21 PM
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#5
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Registered User
Join Date: Jun 2012
Location: Frederick MD
Posts: 658
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Quote:
Originally Posted by Timco
60-120 is WAY faster than 0-60. I would say it has twice the pickup over 3k than below. 1st does 45 or so, 2nd is like 75, and 3rd is well over 100. 2nd & 3rd are much faster than 1st.
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Timco, while gear ratios are relevant to acceleration, it has nothing to do with HP/torque, only how at hp/torque is applied to the road. I don't see how you top speed in every gear is even relevant.
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03-31-2013, 05:34 PM
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#6
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I am my own mechanic....
Join Date: Feb 2013
Location: Salt Lake City, UT
Posts: 3,432
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Quote:
Originally Posted by shadrach74
Timco, while gear ratios are relevant to acceleration, it has nothing to do with HP/torque, only how at hp/torque is applied to the road. I don't see how you top speed in every gear is even relevant.
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I understand this, but was saying that 2nd, 3rd, and so on feel much faster. Yes, top speed is irrelevant. Wrong way to say it. I'm talking 3k and under, or off the line power. Small add ons or upgrades are great, but I'm not swapping my exhaust quite yet!
__________________
'04 Boxster S 50 Jahre 550 Spyder Anniversary Special Edition, 851 of 1953, 6-sp, IMS/RMS, GT Metallic silver, cocoa brown leather SOLD to member Broken Linkage.
'08 VW Touareg T-3 wife's car
'13 F150 Super Crew long bed 4x4 w/ Ego Boost
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03-31-2013, 05:48 PM
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#7
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Track rat
Join Date: Nov 2006
Location: Southern ID
Posts: 3,701
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Low end torque?? 4.0L motor. 
I suspect most inexpensive bolt-on mods will leave you highly unsatisfied. Good luck in your search.
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2009 Cayman 2.9L PDK (with a few tweaks)
PCA-GPX Chief Driving Instructor-Ret.
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04-06-2013, 04:21 PM
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#8
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Registered User
Join Date: Nov 2009
Location: mass
Posts: 731
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you should at very least delete your secondary cats . that and a BMC air filter gave me a good boost in power and much more so in the upper revs. I did not notice much gain with the pulley. believe it or not but replacing my rear wheel bearings gave me a good boost .
Quote:
Originally Posted by Timco
I understand this, but was saying that 2nd, 3rd, and so on feel much faster. Yes, top speed is irrelevant. Wrong way to say it. I'm talking 3k and under, or off the line power. Small add ons or upgrades are great, but I'm not swapping my exhaust quite yet!
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03-31-2013, 08:04 PM
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#9
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Registered User
Join Date: Nov 2010
Location: DFW
Posts: 381
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Quote:
Originally Posted by Timco
60-120 is WAY faster than 0-60....
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If I was a gambler, I'd bet big money here and now that this is wrong.
Let's say that your Boxster does 0-60 in 5.8, or 6 seconds or even 7 seconds.
According to a gps verifiable system, a stock Panamera TT does 10.14 in a 60 to 130 run.
Same car with an ecu tune does 60-130 in 8.28 seconds.
Even if you take into consideration the extra 10mph and the time required, do you think any Boxster will beat their 0-60 time going 60-120?
Oh, get the underdrive pulley for the best gain and it saves your power steering pump too.
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03-31-2013, 08:19 PM
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#10
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I am my own mechanic....
Join Date: Feb 2013
Location: Salt Lake City, UT
Posts: 3,432
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Quote:
Originally Posted by DFW02S
If I was a gambler, I'd bet big money here and now that this is wrong.
Let's say that your Boxster does 0-60 in 5.8, or 6 seconds or even 7 seconds.
According to a gps verifiable system, a stock Panamera TT does 10.14 in a 60 to 130 run.
Same car with an ecu tune does 60-130 in 8.28 seconds.
Even if you take into consideration the extra 10mph and the time required, do you think any Boxster will beat their 0-60 time going 60-120?
Oh, get the underdrive pulley for the best gain and it saves your power steering pump too. |
Interesting. I'll time this tomorrow. I'm just going by feel.
What is an underdrive pulley? Any brand names? Common part or special order?
__________________
'04 Boxster S 50 Jahre 550 Spyder Anniversary Special Edition, 851 of 1953, 6-sp, IMS/RMS, GT Metallic silver, cocoa brown leather SOLD to member Broken Linkage.
'08 VW Touareg T-3 wife's car
'13 F150 Super Crew long bed 4x4 w/ Ego Boost
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03-31-2013, 09:09 PM
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#11
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Registered User
Join Date: Dec 2012
Location: Jackson Hole, Wyoming
Posts: 800
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04-01-2013, 11:10 AM
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#12
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Homeboy981
Join Date: Jan 2012
Location: Sherman, TX
Posts: 663
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Quote:
Originally Posted by DFW02S
If I was a gambler, I'd bet big money here and now that this is wrong.
Let's say that your Boxster does 0-60 in 5.8, or 6 seconds or even 7 seconds.
According to a gps verifiable system, a stock Panamera TT does 10.14 in a 60 to 130 run.
Same car with an ecu tune does 60-130 in 8.28 seconds.
Even if you take into consideration the extra 10mph and the time required, do you think any Boxster will beat their 0-60 time going 60-120?
Oh, get the underdrive pulley for the best gain and it saves your power steering pump too. |
All spoken like a TRUE RACER! DFW02S SHOULD KNOW - he has been to every track around here testing!
BTW - Cold Air Intake was the cheapest bang for me! Less than $100 - built my own - there's a thread on it somewhere here (you can pay $200-$500 for one - so be aware).
UD Pulley (a good one like RSS) is $200. Be careful filing down the boss. And make sure to include a new crankshaft bolt, another $10.
For $250 you could have a nice-sounding exhaust with reasonable grunt in the low end. Combine that with a Cat Back system (around $150) and you are off!
Individual results may vary!
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2002 Porsche Boxtser S - Silver & Chrome - Died from IMS failure AFTER IMS was replaced!
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04-05-2013, 05:49 AM
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#13
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Registered User
Join Date: Nov 2008
Location: Atlanta
Posts: 188
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Quote:
Originally Posted by shadrach74
Interesting. I have an 02 S, and I think it has one of the flattest power bands of any car I've driven. If anything, I would like more poke in the upper rev range. Yours becomes a rocket above 3k huh. Mine is flat from ~1800 all the way up with a very slight "step" at around 4500rpm. It's plenty fast, it just doesn't feel fast until you look at the speedo...
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You forget he's rocking 264hp to your measley 250. 
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2004 50 Years of 550 Spyder Anniversary Edition
(worst name for a car EVAH)
2002 996TT X50 Artic Silver, Natural Grey (which is black)
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04-05-2013, 03:51 PM
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#14
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Registered User
Join Date: Jun 2012
Location: Frederick MD
Posts: 658
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Quote:
Originally Posted by NoGaBiker
You forget he's rocking 264hp to your measley 250. |
Yes and according to Porsche, no "discernable" difference in performance... 2002 S shows tested 0-60s ranging from 5.3 to 5.7secs. 2004 550 5.2 to 5.7secs. My 02 makes 85% of max torque by 2000rpm. Low end torque is not the issue with the 3.2s, however some additional top end poke would make the cars feel more Porsche like in my opinion.
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03-31-2013, 03:28 PM
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#15
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Registered User
Join Date: Jul 2004
Location: Houston, Texas
Posts: 7,243
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Underdrive pulley?
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03-31-2013, 03:54 PM
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#16
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Registered User
Join Date: Nov 2008
Location: Massachusetts
Posts: 4,810
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The LWUP is probably the best bang for the buck. However, my experience has been that a thorough and comprehensive approach to upgrading the exhaust system is where the power gets unleashed. Ex$pensive though !
__________________
Don't worry … I've got the microfilm.
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03-31-2013, 05:31 PM
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#17
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I am my own mechanic....
Join Date: Feb 2013
Location: Salt Lake City, UT
Posts: 3,432
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Quote:
Originally Posted by RandallNeighbour
Underdrive pulley?
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What is this??
__________________
'04 Boxster S 50 Jahre 550 Spyder Anniversary Special Edition, 851 of 1953, 6-sp, IMS/RMS, GT Metallic silver, cocoa brown leather SOLD to member Broken Linkage.
'08 VW Touareg T-3 wife's car
'13 F150 Super Crew long bed 4x4 w/ Ego Boost
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04-05-2013, 06:17 AM
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#18
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Registered User
Join Date: Nov 2012
Location: Maine
Posts: 52
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According to the above link: chetah****
"Horsepower increases should be up to 15hp at the crank, and this estimate has been verified from dyno results with other similar pulleys. This pulley is intended to work with any Porsche that has a stock pulley number of 996.102.115.63. "
That's a tall order... Not sure I'm buying that?
bc
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1999 Boxster Base Ocean Blue Metallic 5 speed with hardtop
2015 Porsche Macan Turbo
2021 Mini Cooper S Convertible, Black Leather, 5 speed The Misses car
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04-05-2013, 03:52 PM
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#19
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Registered User
Join Date: Dec 2008
Location: Queensland, Australia
Posts: 1,522
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I spoke to Jake Raby a few years ago regarding Flat6's underdrive pulley. He says that the pulley was good for 10hp above the standard item and after fitting mine I would tend to agree.
The improvement is felt in the lower to mid range revs, just were we drive most. Its not a difficult or expensive replacement and after 3 years of operation I still believe its the best cost effective mod I've invested in.....
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2001 Boxster S (triple black). Sleeping easier with LN Engineering/Flat 6 IMS upgrade, low temp thermostat & underspeed pulley.
2001 MV Agusta F4.
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04-06-2013, 04:32 PM
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#20
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Registered User
Join Date: Nov 2012
Location: Maine
Posts: 52
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Interesting. I may give it a try
Pup
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1999 Boxster Base Ocean Blue Metallic 5 speed with hardtop
2015 Porsche Macan Turbo
2021 Mini Cooper S Convertible, Black Leather, 5 speed The Misses car
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