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Competition Cams 7138 Keyway Adjustable Review

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Average

Revainrating 3.5 out of 5  
Rating 
3.3
🚀 Engines & Engine Parts, 🏎️ Performance Car Parts & Accessories

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Description of Competition Cams 7138 Keyway Adjustable

Premium Quality Gears - COMP Cams Keyway Adjustable Timing Sets are built using high end materials. Both the camshaft gear and crankshaft gear are constructed from from induction hardened billet steel. Adjustable - Designed to help ensure the best performance, COMP Cams Keyway Adjustable Timing Sets feature 9 keyways on the crankshaft sprocket. The middle keyway installs the camshaft with zero degrees of advance, while the other eight allow for 8 degrees advance or retard, in two degree incrememnts. The Best Chain - Pre-stretched from the factory then heat-treated, this true double roller chain is designed to handle street and race applications without loosening up.With a heavy-duty large pin design, our chains ensure timing accuracy for the life of your engine. Plus, the chains are available separately!. Tight Tolerances - COMP's Keyway Adjustable Timing Sets are all dynamically balanced before they get to our customers. We ensure that all sets are quality checked and held to the tightest tolerances in the industry for "run-out". Race Ready -Keyway Adjustable Timing Sets are ready to handle the high load race conditions. Thanks to their quality construction, adjustability, pre-stretched chain and tight quality control tolerances, the COMP Cams Keyway Adjustable series timing sets are among the best available. Fits '65-'88 Ford 289-351W (Requires 1 Piece Fuel Pump Eccentric). See 3030 for replacement chain. Made in USA.

Reviews

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Type of review

Revainrating 3 out of 5

Useless Adjustable Keyway for Engine

Based on my observations, this product is a complete disappointment .The installation was difficult, and even after adjusting the keyway, there was no significant change in performance. The only good thing I can say about it is that it looks nice on my engine. However, the lack of results outweighs any aesthetic appeal..

Pros
  • Allows for precise timing adjustments to improve engine performance.
Cons
  • Requires technical knowledge and skill to install correctly.

Revainrating 4 out of 5

You need to machine the cam pressure plate.

You must machine the cam pressure plate to use countersunk bolts. The mechanic did it for me for $5, which was less than what it would have cost to do it myself. You may also need to remove a few thousandths from the cam pressure plate to get the correct cam endplay.

Pros
  • Fits Ford 289-351W '65-'88 (requires 1 fuel pump cam)
Cons
  • Security