[68WarDog]

Who's running the titanium vs Pacaloy valve springs ? And how often are you changing the titanium out? Other than weight ,what are the advantage of titanium
I have always ran titanium retainers with pacaloy vs. Because I do a lot of street miles per year , considering changing over to titanium valve springs with the hardened tips on next cycle( usually around 4/5 years).
This is for guys with solid rollers on the street. Thanks

[mgarblik]

Interesting article about higher end valve springs: https://www.enginelabs.com/engine-te...y-performance/

We have run PAC, Manley, and Ferrea triple springs, pacaloy, and other proprietary clean metal alloys at seat pressures from 260-450 lbs. 7500-8500 RPM's for drag racing only. Very few spring issues but we pay close attention to coil bind as well as not having too much coil space with valve open. Titanium springs were beyond our budget with a good triple steel spring set closing in on $600.00 a set. We typically had to change them once a year. If you end up using titanium springs, report back how they work in your application. BTW, we always ran TI valves with hard tips , no lash caps on the intake and Superalloy steel exhaust valves with the "Lash Locks" described in the article. TI exhaust valves couldn't withstand the heat. Good luck with the new build

[68WarDog]

Originally Posted by mgarblik

Interesting article about higher end valve springs: https://www.enginelabs.com/engine-te...y-performance/

We have run PAC, Manley, and Ferrea triple springs, pacaloy, and other proprietary clean metal alloys at seat pressures from 260-450 lbs. 7500-8500 RPM's for drag racing only. Very few spring issues but we pay close attention to coil bind as well as not having too much coil space with valve open. Titanium springs were beyond our budget with a good triple steel spring set closing in on $600.00 a set. We typically had to change them once a year. If you end up using titanium springs, report back how they work in your application. BTW, we always ran TI valves with hard tips , no lash caps on the intake and Superalloy steel exhaust valves with the "Lash Locks" described in the article. TI exhaust valves couldn't withstand the heat. Good luck with the new build

Very interesting and informative article. What really stood out is the information regarding fatigue titanium valve breakage, sending metal particles throughout the engine
Steel fatigue will show up in changes in lash setting

[grandville455]

Originally Posted by mgarblik

Interesting article about higher end valve springs: https://www.enginelabs.com/engine-te...y-performance/

We have run PAC, Manley, and Ferrea triple springs, pacaloy, and other proprietary clean metal alloys at seat pressures from 260-450 lbs. 7500-8500 RPM's for drag racing only. Very few spring issues but we pay close attention to coil bind as well as not having too much coil space with valve open. Titanium springs were beyond our budget with a good triple steel spring set closing in on $600.00 a set. We typically had to change them once a year. If you end up using titanium springs, report back how they work in your application. BTW, we always ran TI valves with hard tips , no lash caps on the intake and Superalloy steel exhaust valves with the "Lash Locks" described in the article. TI exhaust valves couldn't withstand the heat. Good luck with the new build

How close did u run your springs to CB? .060?

[mgarblik]

Originally Posted by grandville455

How close did u run your springs to CB? .060?

Ran about .060" on the TI intakes. About .090" on the exhaust because they were so long and heavy and was concerned they would continue to compress at high RPM's, (loft). Over 6" long in the billet heads. 1.800" diameter, 3/8" stem. We started with 11/32" stems but they would warp and bend from the incredible heat and the loose clearance we had to run. .004". Intake was never an issue with the smaller stems.