Nabdrill

iTrader: (19)

Inst HT Press Rate/inch
1.775 140 367
1.725 158
1.675 177 0.100
1.625 195
1.575 213 0.200
1.525 232
1.475 250 0.300
1.425 268
1.375 287 0.400
1.325 305
1.275 324 0.500
1.225 342
1.175 360 0.600
1.125 379
1.075 397 0.700
1.025 415 Coil Bind

Had the Patriot Spring kit(.660") installed on my 317's this week. FOr those interested... here are the pressures for your enjoyment.

Kurtomac

iTrader: (5)

are these the newer PRC springs? EHT .650s? I run the .675 EHT PRC springs on my TFS heads with good results with a aggressive cam, YT rockers, and 3/8 pushrods

Nabdrill

iTrader: (19)

https://www.patriot-performance.com/...0&cat=0&page=1

This is the kit on my heads

Sales2@Texas-speed

iTrader: (5)

Those are not the .675" lift EHT springs...they are a standard .650" lift spring.

Nabdrill

iTrader: (19)

Well, after running around the horn 3 or 4 times today, I discovered that this is actually a Patriot Spring Kit that's on my heads... Found out because of the valve locks that you have to get specifically from Patriot.
https://www.patriot-performance.com/...0&cat=0&page=1
Sorry for the confusion.

We should change the title of this post

Jenson

iTrader: (32)

Where can one find the specs on the EHT .675's? I need to replace my manley's and at $100 cheaper these sound like a good option

Sales2@Texas-speed

iTrader: (5)

http://www.texas-speed.com/shop/item...=1013&catid=48

There's their web page...what all do you want to know? I can get you whatever you need on these springs

Nabdrill

iTrader: (19)

You can find Patriot spring rates on their website. The guys at Texas Speed could prob hook you up on the info you're looking for.

Jenson

iTrader: (32)

Yea I was looking for this type of info on the PRC EHT .675's. I got the PRC's and patriots confused, sorry.

Patriot .660"s
Install Height: 1.800"
Max. Valve Spring Lift: 0.660"
Spring Pressure Closed: 155 lbs. @ 1.800"
Spring Pressure Open: 410 lbs. @ 1.140"
Coil Bind: 1.090"

Currently running Manley's
Lift:660"
OD:1.295"
ID:.676"
Install Closed pressure:155 @ 1.810
Open pressure:405 @ 1.150
Rate:379
CB:1.100"

Sales2@Texas-speed

iTrader: (5)

PRC EHT 675's
Install Height: 1.800"
Max Valve Spring Lift: 0.675"
Spring Pressure Closed: 157 lbs. @ 1.800"
Spring Pressure Open: 483 lbs. @ 1.125" (.675" Valve Lift)
Spring Pressure Open: 476 lbs. @ 1.140" (.660" Valve Lift)
Coil Bind: 1.060"
Spring Rate: 483lbs/in

Jenson

iTrader: (32)

I think I'll have to give those a try and see how much longer they last.

End