Looking for a valve spring that...
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Looking for a valve spring that... Will preferably be a drop in spring that I can get a 170-180 lb seat pressure and 410-430 lb open from. The issue I see after looking at most of the drop in springs is that they only support .650" lift (.660 at most) and if I shim them I run into coil bind issues (.610ish lift).
I can machine the heads to accept a bigger spring (BBC), but was hoping to avoid that. Anyone know a good spring that will support what I need?
Dan
I can machine the heads to accept a bigger spring (BBC), but was hoping to avoid that. Anyone know a good spring that will support what I need?
Dan
Thread Starter
10 Second Club
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From: Cali/Bay Area
I'll check those out, they look promising with .700 lift, a little shiming and i can probably get the seat # I want.
Dan
Or These:
Patriot Performance
Patriot Dual 'Gold' Xtreme Springs
Same great quality as the Original Patriot Gold springs.
Max lift .660"
Recommended installed height 1.800".
Seat pressure 155 lbs
Open pressure 410 lbs @ open @ height of 1.140"
Set up for a drop-in application, no machining required. Will work with aggressive LSK lobe camshafts, includes titanium retainers, Super 7 Locks, machined bases, and viton seals.
Patriot Performance
Patriot Dual 'Gold' Xtreme Springs
Same great quality as the Original Patriot Gold springs.
Max lift .660"
Recommended installed height 1.800".
Seat pressure 155 lbs
Open pressure 410 lbs @ open @ height of 1.140"
Set up for a drop-in application, no machining required. Will work with aggressive LSK lobe camshafts, includes titanium retainers, Super 7 Locks, machined bases, and viton seals.
Thread Starter
10 Second Club
iTrader: (5)
Joined: Nov 2001
Posts: 3,412
Likes: 0
From: Cali/Bay Area
Or These:
Patriot Performance
Patriot Dual 'Gold' Xtreme Springs
Same great quality as the Original Patriot Gold springs.
Max lift .660"
Recommended installed height 1.800".
Seat pressure 155 lbs
Open pressure 410 lbs @ open @ height of 1.140"
Set up for a drop-in application, no machining required. Will work with aggressive LSK lobe camshafts, includes titanium retainers, Super 7 Locks, machined bases, and viton seals.
Patriot Performance
Patriot Dual 'Gold' Xtreme Springs
Same great quality as the Original Patriot Gold springs.
Max lift .660"
Recommended installed height 1.800".
Seat pressure 155 lbs
Open pressure 410 lbs @ open @ height of 1.140"
Set up for a drop-in application, no machining required. Will work with aggressive LSK lobe camshafts, includes titanium retainers, Super 7 Locks, machined bases, and viton seals.
Thanks for the input!
Dan
PM me if you are interested!
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I wouldnt put .700 lift on those springs,if you shim them enough to get 170 lbs your going to be at coil bind,you need at least .060 clearance from bind height
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Launching!
Joined: Jun 2007
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From: NC
At 1.760" you should be almost at 170 lbs with the PAC-1521. With your lift of .660" That will put you .060-.070" from coil bind.
Doesn't matter though since the only 1521s that I had were prototypes for my own test puposes. A couple sets were given out after I did my cycle testing and are being put in .700" lift LSXs right now for some dyno testing.
The production batch is a couple of months out.
fyi. The rate hemietr posted is a 100 lb/in off.
Thread Starter
10 Second Club
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From: Cali/Bay Area
.He was saying with his lift he could shim them up.
At 1.760" you should be almost at 170 lbs with the PAC-1521. With your lift of .660" That will put you .060-.070" from coil bind.
Doesn't matter though since the only 1521s that I had were prototypes for my own test puposes. A couple sets were given out after I did my cycle testing and are being put in .700" lift LSXs right now for some dyno testing.
The production batch is a couple of months out.
fyi. The rate hemietr posted is a 100 lb/in off.
At 1.760" you should be almost at 170 lbs with the PAC-1521. With your lift of .660" That will put you .060-.070" from coil bind.
Doesn't matter though since the only 1521s that I had were prototypes for my own test puposes. A couple sets were given out after I did my cycle testing and are being put in .700" lift LSXs right now for some dyno testing.
The production batch is a couple of months out.
fyi. The rate hemietr posted is a 100 lb/in off.
Dan
