Nst pulley kit & DC Header - Page 3 - Scion iM Forum
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post #21 of 33 Old 04-03-2017, 12:52 PM
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I have had the NST crank pulley installed for over 3 months... zero issues. Never had the car dyno'd but at least 5-7 whp gain from the pulley alone. It's free horsepower. Doesn't hurt the engine in any way it simply frees up rotating mass. One of the cheapest safest ways to gain power on just about any vehicle and doesn't require a retune... the only time I could see a tune being needed for pullys are maybe belt driven supercharged engines, but not N\A or Turbo charged vehicles.

Performance Mods: Custom full exhaust (scuba removed), Injen Cold Air intake, NST Pulley, DC Sports Header, TB Performance traction bar & mid brace, GodSpeed Mono SS Coilolvers.
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post #22 of 33 Old 04-12-2017, 01:24 AM
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I have had the NST crank pulley installed for over 3 months... zero issues. Never had the car dyno'd but at least 5-7 whp gain from the pulley alone. It's free horsepower. Doesn't hurt the engine in any way it simply frees up rotating mass. One of the cheapest safest ways to gain power on just about any vehicle and doesn't require a retune... the only time I could see a tune being needed for pullys are maybe belt driven supercharged engines, but not N\A or Turbo charged vehicles.

Performance Mods: Custom full exhaust (scuba removed), Injen Cold Air intake, NST Pulley, DC Sports Header, TB Performance traction bar & mid brace, GodSpeed Mono SS Coilolvers.
Did you use the stock belt after changing the pulley?
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post #23 of 33 Old 05-03-2017, 08:41 PM
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I have had the NST crank pulley installed for over 3 months... zero issues. Never had the car dyno'd but at least 5-7 whp gain from the pulley alone. It's free horsepower. Doesn't hurt the engine in any way it simply frees up rotating mass. One of the cheapest safest ways to gain power on just about any vehicle and doesn't require a retune... the only time I could see a tune being needed for pullys are maybe belt driven supercharged engines, but not N\A or Turbo charged vehicles.

Performance Mods: Custom full exhaust (scuba removed), Injen Cold Air intake, NST Pulley, DC Sports Header, TB Performance traction bar & mid brace, GodSpeed Mono SS Coilolvers.
Did you use the stock belt after changing the pulley?
Which pulley and can you post a link of the site you bought it on ? Also did you need to get a new belt?
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post #24 of 33 Old 05-08-2017, 05:11 AM
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Which pulley and can you post a link of the site you bought it on ? Also did you need to get a new belt?
I think Nick bought the pulley for the Scion xD. I bought the one for the Corolla S and didn't need a new timing belt, but did need the alternator moved forward. It requires drilling another hole into the alternator bracket. Here is the link for the one I bought: http://www.shopnonstoptuning.com/sto...NST08010_.html
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post #25 of 33 Old 07-26-2017, 04:01 PM Thread Starter
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Which pulley and can you post a link of the site you bought it on ? Also did you need to get a new belt?
I think Nick bought the pulley for the Scion xD. I bought the one for the Corolla S and didn't need a new timing belt, but did need the alternator moved forward. It requires drilling another hole into the alternator bracket. Here is the link for the one I bought: http://www.shopnonstoptuning.com/sto...NST08010_.html
I actually have yet to install mine also the same pulley as you/I linked/posted.. But To have the alternator moved forward? Can you provide pictures and reason to why you had to move it forward? Or would buying a new belt be better? Thanks!
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post #26 of 33 Old 09-29-2017, 08:47 PM
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Thanks for the input or your opinions guys.

Although imho & experiences I'm not too worried about the LW Pulley as when they say Harmonic dampers (usually in older engines) the pulley would have this hard rubber in the middle of the pulleys.

In our newer engines that are usually now internally balanced/tuned (No rubber in the middle of our pulleys for "harmonic dampening effects) is to why I'm not too worried. This issue was also brought up in the older 1zzs in other forums that reported
Minor issues. Like dimming lights or not strong enough a/c etc. But we're later fixed.. From my past understanding it frees up HP that the engine already has from being LW rather then you gaining & Usually those people who report bad things are because they beat on their vehicles & don't drive/maintain them well.
From experiences with fam/friends doing n/a mods I can say that yes it may not be alot but like every penny.. That little HP counts.

I can say the same HP wise for the DC headers & exhaust system.. Yes the exhaust is key to the header other wise you'll just gain sound & like 1-4 hp like the 1Zs from past experiences lol. Some reported porting their headers showed same/better to no results then getting a aftermarket header.

Anyway I don't want this to turn into a debate. I just wanted opinions and or if anyone has an opinion who HAS already installed them.
Here is a picture on my 2009 Corolla S with the same engine and you can easily see that the pulley itself has no dampening design like you were pointing out. Looks to be all metal and internally balanced/dampened as you pointed out. I bought one of these LW NST pulleys for my 2009 Corolla S but when I decided to turbocharge it I figured it wasn't needed so I was going to sell it. Good thing I never did! Now I can use it on my iM. Several people that installed them on their 10th Gen Corollas liked the HP that they freed up giving the engine more response. Every HP matters!

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post #27 of 33 Old 09-29-2017, 09:07 PM
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I gained throttle response and (admittedly subjectively) a little bit more torque even just with a TRD axleback exhaust (obviously no ECU tuning). I accept I could be imaging it but I don't think I am. If there is any more power though I wouldn't think it more than a few hp at the very most - probably more like 2. But it was more the throttle response that I really liked about that modification.


But for a serious gain I agree with what you say. Here in Australia we have a production Toyota 86 Racing Series and the cars are remarkably similar to showroom stock. They obviously have to have significant modifications related to safety and the brakes are upgraded but so far as the drivetrain is concerned, the only mods are the exhaust (from headers all the way back) plus an ECU upgrade. The intake including air filter is 100% stock. It was explained that the two upgrades (ECU and exhaust) had to go hand in hand and if they didn't, it just wouldn't work at all. The competition cars in this configuration have 179 kw flywheel output 7,500 versus the stock output of 147 kw at 7,000. Torque is also considerably raised lower down - up to 246 nm from 205 nm.


Granted the 1.8 Corolla engine is not the 86 engine but it is still a normally aspirated current model Toyota and I think the same would apply in that to get the maximum out of a new exhaust, an ECU tune is necessary.
I had my 2009 Corolla S numbers check on the dyne before I turbocharged it. In stock form it is rated at 132 HP at the crank and 112 HP at the wheels. I had a Takeda SRI, Borla axle back exhaust but no headers or ECU tune. With these mods I was at 147 crank HP and 125 wheel HP. Thats a healthy gain of 15 HP at the crank and 13 at the wheels. I knew it helped but until I did the dyne test I didn't know how much. I had all kinds of people telling me it wouldn't make a difference but it did. With a tune it would be even better. After my turbo install with a mild tune I'm currently at 230 crank HP and 195 wheel HP/175 ft/lb of torque.

I've seen many people use the same AEM FIC on the 1st Gen xB with headers, exhaust and intake and produce some nice power with a tune. I've been thinking of doing that too on my 2006 xB.

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17 Corolla iM CSM 6MT/ 17 RAV4 XLE MGM
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Last edited by SuperchargedMR2; 09-29-2017 at 09:20 PM.
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post #28 of 33 Old 09-30-2017, 01:50 AM
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Originally Posted by SuperchargedMR2 View Post
I had my 2009 Corolla S numbers check on the dyne before I turbocharged it. In stock form it is rated at 132 HP at the crank and 112 HP at the wheels. I had a Takeda SRI, Borla axle back exhaust but no headers or ECU tune. With these mods I was at 147 crank HP and 125 wheel HP. Thats a healthy gain of 15 HP at the crank and 13 at the wheels. I knew it helped but until I did the dyne test I didn't know how much. I had all kinds of people telling me it wouldn't make a difference but it did. With a tune it would be even better. After my turbo install with a mild tune I'm currently at 230 crank HP and 195 wheel HP/175 ft/lb of torque.

I've seen many people use the same AEM FIC on the 1st Gen xB with headers, exhaust and intake and produce some nice power with a tune. I've been thinking of doing that too on my 2006 xB.
Impressive uptick
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post #29 of 33 Old 11-14-2017, 09:57 PM
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Performance Mods: Custom full exhaust (scuba removed), Injen Cold Air intake, NST Pulley, DC Sports Header, TB Performance traction bar & mid brace, GodSpeed Mono SS Coilolvers.
**** dude! Those are some mods! How does the car drive in its current form vs stock? Also, 6mt? I love a lot of things about this car, but I miss being modded, I remember putting the SRI, cat back, and upgraded clutch on my Integra made a huge difference in the feel of the car. I think mod-wise I'll probably follow in your footsteps, I just need to find some more aggressive aero.. I'm a little disappointed that there is hardly any exterior mods for this car.

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post #30 of 33 Old 11-16-2017, 11:59 AM
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Originally Posted by Nick Prescott View Post
Performance Mods: Custom full exhaust (scuba removed), Injen Cold Air intake, NST Pulley, DC Sports Header, TB Performance traction bar & mid brace, GodSpeed Mono SS Coilolvers.
**** dude! Those are some mods! How does the car drive in its current form vs stock? Also, 6mt? I love a lot of things about this car, but I miss being modded, I remember putting the SRI, cat back, and upgraded clutch on my Integra made a huge difference in the feel of the car. I think mod-wise I'll probably follow in your footsteps, I just need to find some more aggressive aero.. I'm a little disappointed that there is hardly any exterior mods for this car.

Sent from my Moto G (5) Plus using Tapatalk

I agree, mods are awesome for basic bolt ons without adding anything crazy (like a turbo) I just installed my HPS short ram with a heat shield about 2 days ago and I can feel a little difference in the response but not enough. I want to upgrade the headers / exhaust next then maybe the pully. But to go off of what you said about the aero, can we please start an exterior mod forum. I want something that's close to the concept look!!
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