LS3 Valve Spring Upgrade (drop in)
LS3 Valve Spring Upgrade (drop in) I'm looking for a Valve spring with a 130# on the seat, and around 320# open, that will drop right into my stock ls3 heads. It's not a very aggressive cam, and these are the spring pressures it calls for.
I'm just curious if anyone here has ever used the Trickflow Racing (by PAC) spring # TFS-16918-16. Summit sells them for $140ish and according to this document, they fit the stock retainer and locks.
https://static.summitracing.com/glob...s-16801-32.pdf
And according to the Trickflow website.
https://www.trickflow.com/parts/tfs-16918-16
They fit inside the stock seats, which if i remember correctly, are the valve seals themselves. Its a seat/seal deal. Right?
Can I buy just these springs and slap them into my LS3 head?
I'm just curious if anyone here has ever used the Trickflow Racing (by PAC) spring # TFS-16918-16. Summit sells them for $140ish and according to this document, they fit the stock retainer and locks.
https://static.summitracing.com/glob...s-16801-32.pdf
And according to the Trickflow website.
https://www.trickflow.com/parts/tfs-16918-16
They fit inside the stock seats, which if i remember correctly, are the valve seals themselves. Its a seat/seal deal. Right?
Can I buy just these springs and slap them into my LS3 head?
PAC 1218 Beehives are drop in replacements. They are 130 lbs at 1.800" and 318 lbs at 1.200" and have a max lift of .600".
Comp 918s are drop in as well. They are 125 lbs at 1.800" and 367 at 1.150" and have a max lift of .625".
Trickflow Springs are made by PAC Racing and the springs you listed from Trickflow are the PAC 1218's. A good price for the PAC 1218's is $139 which is what I paid for mine. Very good springs for a smaller cam under .580" lift for good spring life.
Stock seals have a built in seat. I recommend changing the intake and exhaust seals with new OEM seals while your in their since they are cheap.
Comp 918s are drop in as well. They are 125 lbs at 1.800" and 367 at 1.150" and have a max lift of .625".
Trickflow Springs are made by PAC Racing and the springs you listed from Trickflow are the PAC 1218's. A good price for the PAC 1218's is $139 which is what I paid for mine. Very good springs for a smaller cam under .580" lift for good spring life.
Stock seals have a built in seat. I recommend changing the intake and exhaust seals with new OEM seals while your in their since they are cheap.
Last edited by 07NBSChevy; Jan 4, 2017 at 10:37 PM.
