SPEED PERF6RMANC3
SP63 Keyed Crankshaft For Mazda MZR-DISI - Mazdaspeed 3/6
SP63 Keyed Crankshaft For Mazda MZR-DISI Mazdaspeed3/6
SP63 Custom 50* VVT Kit | Mazda MZR DISI
Advancing the intake camshaft is common practice at lower RPM’s to help increase torque output of the engine where it is normally lacking. Advancing the intake camshaft shifts the valve opening time to begin earlier for the piston’s intake stroke which helps fill the cylinder with more air than it normally would without the advance. This increases low end torque and also spools the turbocharger faster. VVT Advance is normally set to maximum advance at low RPM’s and tapers down to 0 advance by midrange RPM (usually around 4500 to 5000 RPM) where the advance is no longer needed and would actually hurt power output. Vehicles with upgraded turbochargers that have noticeable lag benefit most from using maximum VVT advance in the lower RPM’s to get the turbocharger to spool up as quickly as possible especially for street driven vehicles.
Our upgraded VVT Actuator allows your Mazdaspeed vehicle to advance the camshaft up to 55 crankshaft degrees (25 camshaft degrees) along with a much stronger timing chain that is extremely robust and doesn’t stretch as easily as the OEM Mazda timing chain does! These additional 7 degrees of camshaft advance allows your larger turbos to spool up even faster and bring the torque curve in further to the left of the RPM Range. This improvement in low end response is best witnessed when running aftermarket camshafts with higher duration where low rpm power/torque is typically compromised for higher RPM power & efficiency. Being able to advance the intake camshaft to 55 crankshaft degrees helps bring back the lower RPM grunt & spool up that was lost due to upgraded camshaft profiles.
The OEM Mazda VVT Actuator allows the intake camshaft to advance up to a maximum of 36 crankshaft degrees. The OEM Mazda Actuator is mechanically limited to this amount of advance. Nothing else can be done through tuning to advance the camshaft any further even if you set the target VVT advance to more than 36 degrees. The ECU will attempt to achieve a higher value, but the OEM Actuator is mechanically maxed out from advancing any further.
Lastly, the improved chain design used in order to run this VVT actuator makes the job well worth it because this chain design is not prone to stretching easily as the OEM Mazda chain is. We have seen OEM Mazda chains stretch with as little as 20,000 miles on high power Mazdaspeed vehicles. With the stronger and beefier chain used in conjunction with this VVT, we have seen engines with 80,000 miles making 700+ WHP that are still running the original chain and have not stretched.
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You may return most new, unopened items within 30 days of delivery for a full refund. We'll also pay the return shipping costs if the return is a result of our error (you received an incorrect or defective item, etc.).
You should expect to receive your refund within four weeks of giving your package to the return shipper, however, in many cases you will receive a refund more quickly. This time period includes the transit time for us to receive your return from the shipper (5 to 10 business days), the time it takes us to process your return once we receive it (3 to 5 business days), and the time it takes your bank to process our refund request (5 to 10 business days).
If you need to return an item, simply login to your account, view the order using the "Complete Orders" link under the My Account menu and click the Return Item(s) button. We'll notify you via e-mail of your refund once we've received and processed the returned item.
We can ship to virtually any address in the world. Note that there are restrictions on some products, and some products cannot be shipped to international destinations.
When you place an order, we will estimate shipping and delivery dates for you based on the availability of your items and the shipping options you choose. Depending on the shipping provider you choose, shipping date estimates may appear on the shipping quotes page.
Please also note that the shipping rates for many items we sell are weight-based. The weight of any such item can be found on its detail page. To reflect the policies of the shipping companies we use, all weights will be rounded up to the next full pound.
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