Reply to thread

See what others are reading now! Try Forums > Current Activity

Message: <blockquote data-quote="TE27levin" data-source="post: 414443" data-attributes="member: 713">why some ppl run adjustable pulley at 20v run faster? how we make our car run faster?20v is a high rev engine, to make it run faster we need to push all the power band according to the engine's habits. this taken from http://turbomagazine.com/tech/0304tur_chart/""Powerband IdentificationWhen you're driving your car in a spirited fashion, what's the engine doing? When you shift, where does the tach needle fall? Using our Project Code Name SE-R (the project car formerly known as SE-Rious Sentra) as an example, let's get a rundown on the revving habits of its SR20DE.This is pretty straightforward. Get on the throttle until 7000 rpm and shift. Eyeing the tach, we observed the needle drop to 5100 rpm. Shifting at 6500 rpm netted a drop to 4900 rpm. So our engine's "sweet spot" is in the 5000-rpm to 7000-rpm range. This fact is proven on the dyno, where we see the power curve develop a real aggressive arc at this point in the pull.Parts Have Power Targets Now that you understand the habits of your engine, you need to know what to expect from the parts you add-not just how much power they generate, but where in your engine's powerband this power will be realized.For instance, there are what can be called efficiency parts like intakes, headers, high-flow cats and exhaust systems that address restrictions in the OEM components they replace. This type of component should impact top-end power. Since a restriction becomes more apparent the higher the engine revs, these performance parts see gains in the mid to high ranges.Cams are a different animal. The design of a cam's lobes dictate where in the powerband the bumpstick will make power. A more aggressive grind translates into a cam that delivers the goods higher in the rev range. Looking to get cams for your street car? A set of race cams designed to make power from 7500 rpm to 9000 rpm would be a disaster.Talk to the manufacturer about where its cams will make power and be sure the bumpsticks you buy match your engine's behavior.Power pulleys make power constantly. By virtue of weighing less, their reduction of rotating inertia is evident at all engine speeds, so the curve is merely bumped up in a proportionally equal amount throughout the measurable powerband. This proportional phenomenon can also be seen in some ECU ROM tunes that optimize the performance of a collection of components.Turbos make power everywhere, but turbine housing size and wheel trim will affect how quickly the peak is reached. The maximum boost and efficiency of the compressor wheel will also affect the ultimate power produced by the system.Factors such as intercooling efficiency, fuel enrichment capabilities and tuning will also be felt on the bottom line. The dyno graph allows the tuner to see how quickly the boost is being made, how much power is being made so he can make changes to A/R ratios, compressor wheels or entire turbos to realize the correct power curve for a given engine.</blockquote>

Verification

The Marketplace Latest

Mugen MS-C Full Bucket Seat Civic Type R FL5 FK8
- Started by aycy
- Engine and Performance
Boost Logic Boostlogic Oil Cooler Kit R35 GTR GTR35
- Started by aycy
- Engine and Performance
Linney IHI 800WHP Turbo Kit R35 GTR35 GTR
- Started by aycy
- Engine and Performance
Varis R35 GTR GTR35 Front Bumper
- Started by aycy
- Exterior and Body
HKS Spec R Titanium Exhaust with Y pipe R35 GTR GTR35
- Started by aycy
- Engine and Performance
2016 BMW 120i LCI M Sport F20 1.6 Auto
- Started by aycy
- Cars for sale
GR Yaris H&R Front Rear Anti Roll Bar
- Started by aycy
- Chassis and Wheels
BBS RI-A 10J God Spec FK8 FL5 Honda Civic Type R...
- Started by aycy
- Chassis and Wheels
Rays Gram Lights 57CR GR Yaris Subaru Impreza Rim...
- Started by aycy
- Chassis and Wheels
2019 Toyota FORTUNER 2.4 VRZ 4X4 (A) Diesel
- Started by aycy
- Cars for sale

Posts refresh every 5 minutes

Satria Neo CPS vandalised with Aerosol spray paint - Solutions Please

http://img24.imageshack.us/img24/2198/img00188201105070653.jpg

My car has been vandalised with spray paint just this morning. and its barely 1 month old!! :bawling: