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Summit Racing® Pro LS Turbo Camshafts SUM-8706

Summit Racing SUM-8706 - Summit Racing® Pro LS Turbo Camshafts
Made in the USA
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Stage 2 Pro LS Turbo Cam. 226/230 Dur., 113+4, .600/.575 Lift, 3-bolt, 5.3, 5.7, 6.0, 6.2, 7.0, Vortec Truck, LS1 LS2 LS6 LS3 LS7 LQ4 LQ9 LS9, Each

Estimated Ship Date: ...Loading Tuesday 5/26/2020
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  • Order this item and get free delivery and handling on your entire order! Offer excludes truck freight and oversize fees. Valid on orders shipped in the contiguous United States.

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Brand: Summit Racing

Manufacturer's Part Number: SUM-8706

Part Type: Camshafts

Product Line: Summit Racing® Pro LS Turbo Camshafts

Summit Racing Part Number: SUM-8706

UPC: 190861218376

Cam Style: Hydraulic roller tappet

Basic Operating RPM Range: 3,000-7,000

Intake Duration at 050 inch Lift: 226

Exhaust Duration at 050 inch Lift: 230

Duration at 050 inch Lift: 226 int./230 exh.

Advertised Intake Duration: 275

Advertised Exhaust Duration: 283

Advertised Duration: 275 int./283 exh.

Intake Valve Lift with Factory Rocker Arm Ratio: 0.600 in.

Exhaust Valve Lift with Factory Rocker Arm Ratio: 0.575 in.

Valve Lift with Factory Rocker Arm Ratio: 0.600 int./0.575 exh.

Lobe Separation (degrees): 113

Camshaft Gear Attachment: 3-bolt

Computer-Controlled Compatible: Yes

Valve Springs Required: Yes

Camshaft Manufacturers Description: The Summit Stage 2 Turbo cam is specifically developed for turbocharged applications. It will spool quickly and minimizes reversion caused by high turbine inlet pressures. It also works well as a high-lift version of the SUM-8714 Stage 4 truck cam. It has state-of-the-art lobe designs stable to well over 7000 rpm with as little as 150 lbs. of seat pressure.

Quantity: Sold individually.

Notes: Not for AFM or VVT equipped engines. Summit Pro LS cams are designed for engines swapped into pre-pollution controlled vehicles. They are not for use in registered emissions-controlled vehicles operated on public highways and roads. 3-bolt camshaft, computer tuning required.

In-Store Pickup: Choose In-store pick-up (OH, NV, GA, TX) on our web site.

The Summit Racing Pro LS Turbo cams are affordable and specifically designed to optimize cam timing with turbochargers. The lobes are stable up to 7,000-plus rpm with the exhaust lobes opening softly against high cylinder pressure for reduced stress on the valve train. Overlap has also been reduced in order to prevent reversion, which is typically seen with higher turbine inlet pressures. They come in distinct stages that give you the idle, spool, and power characteristics that match your engine and turbocharger. Starting with American bearing steel, they are precision machined on a Landis 3LB CNC grinder with CBN diamond wheels for unmatched quality. The lobes have been designed for stability at high rpm with the spring pressures found in commonly available quality spring packs.


Questions & Answers Ask a Product Question

Does this camshaft require a front cam sensor or the stock rear of block common on Gen III engines?

Asked by JOHN on December 23, 2018


Thank you for your question. SUM-8706 has the correct notch in the rear for a Gen. 3 cam pickup. If you are using an early Gen. 4 with a 24X computer, you’ll need a 3 bolt 1X (pole) upper gear p/n NAL-12576407. With a 58X ECM, you can use a 4x (pole) 3-bolt upper gear p/n NAL-12586481. If using Gen. 4 front cover in an early Gen. 3 application, a harness adapter like ICB-WECAM30-48 can be used.

Summit RacingSummit Racing Answer - September 18, 2019

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What is the base circle dimension of this cam?

Asked by ROBERT on April 14, 2020


Thank you for your question. Whole cam cards are located under Charts and Guides on the overview tab.


Summit RacingSummit Racing Answer - April 15, 2020

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Is it ok to run this cam N/A until I get my turbo kit and install it? It might take the better part of a year.

Asked by SHAWN on November 08, 2019


Thank you for your question. The SUM-8706 Stage 2 turbo cam is identical to the Stage 2 automotive N.A. cam except the exhaust closing point has been pulled back 5 degrees to reduce overlap. The exhaust lobe's intensity is a little lower to reduce stress on the valvetrain. This cam will work very well until the turbo kit is installed and even better afterwards.

Summit RacingSummit Racing Answer - December 02, 2019

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Asked by MARK on October 11, 2019


Thank you for your question. A Mark IV hydraulic roller cam similar in duration would be a HRS-120245-12. Due to many differences between engines and usage, please give Summit a call to help you dial in a cam to your needs.

Summit RacingSummit Racing Answer - December 02, 2019

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Some parts are not legal for use in California or other states with similar laws / regulations

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