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Old 08-14-2012, 11:17 AM   #1
Sleeper_RS
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Default Aftermarket valve springs?

Have an 05 RS. I'm building some sohc heads, pnp, delta 1500 cams, gasket matched manifolds, and I need to upgrade my valve springs. Where can I get heavier valve springs that are good? Anyone have experience with super tech? Help me out please I'm at a standstill on my build.
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Old 08-14-2012, 04:41 PM   #2
STi Guy 69er
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I got my springs and retainers from techworks engineering. I think i paid $500.
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Old 08-14-2012, 05:04 PM   #3
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The ej253 from the 06 and up 2.5i is reported to have a slightly stiffer spring.

http://www.rs25.com/forums/f5/t15739...vesprings.html
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Old 08-14-2012, 05:56 PM   #4
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Quote:
Originally Posted by STi Guy 69er
I got my springs and retainers from techworks engineering. I think i paid $500.
Holy crap!
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Old 08-14-2012, 08:04 PM   #5
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Prolly a little overkill on the springs but they weigh next to nothing and that included shipping as well.
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Old 08-14-2012, 08:05 PM   #6
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Quote:
Originally Posted by STi Guy 69er
Prolly a little overkill on the springs but they weigh next to nothing and that included shipping as well.
Valve seals were included as well i think. I cant remember what i paid for the valves. I got a budle deal when i built my heads.
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Old 08-14-2012, 09:31 PM   #7
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Supertech has dual valve springs and cost less.
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Old 08-14-2012, 09:33 PM   #8
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Sounds like an interesting build!
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Old 08-14-2012, 10:36 PM   #9
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I authored the RS25.com thread. Those springs are a great upgrade over the stock EJ251 springs. Roughly 10% higher seat pressure and rate with no additional cost over new stock springs.

I don't like the Supertech kit for the SOHC heads simply because of the 9mm shims that must be placed under them in order to work. It screams "designed for something else".

The Delta 1500 grind is not necessarily aggressive enough to require upgraded springs, unless you're spending a lot of time at the top of the rpm range or are raising it well over 6500.
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Old 08-15-2012, 12:31 AM   #10
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I've talked to ken at delta, and they recommend upgrading valve springs with the 1500s. I am going to be moving my rev limiter to around 6800 so I believe I need them. I don't wanna take any chances. Btw my motor is an ej253 not a 251
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Old 08-15-2012, 12:39 AM   #11
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Quote:
Originally Posted by Nate_1990
Sounds like an interesting build!
Thanks!
My build:
Sohc ej253 heads (stock heads)
Port&polish
Delta 1500 cams
Valve springs ( opinions?)
Injen CAI
Obx EL headers
18" resonator to borla muffler no cats
2.25" exhaust
Stage 1 clutch from gripforce
Cobb crank pulley
Opensource tune

Hoping for 170+ whp.. We will see what happens
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Old 08-15-2012, 07:30 AM   #12
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Quote:
Originally Posted by Sleeper_RS View Post
I've talked to ken at delta, and they recommend upgrading valve springs with the 1500s. I am going to be moving my rev limiter to around 6800 so I believe I need them. I don't wanna take any chances. Btw my motor is an ej253 not a 251
Where did you get your info that you have a 253? Almost 99% sure our 05s still received the 251 but with maf.
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Old 08-15-2012, 10:07 AM   #13
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Hmmm..... I swear I was 253.... Maybe not. The 253 sohc heads will fit my block if I'm 251 right?
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Old 08-15-2012, 10:08 AM   #14
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Not tryin to be rude I'm just clarifying. Lol
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Old 08-15-2012, 11:38 AM   #15
colorfull
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EJ253 in my 05 RS.
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Old 08-15-2012, 12:14 PM   #16
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Quote:
Originally Posted by Sleeper_RS View Post
Hmmm..... I swear I was 253.... Maybe not. The 253 sohc heads will fit my block if I'm 251 right?

well does your 253 heads have avcs?

if so you will need to find a way to always keep the higher rpm lobe engaged. i think with no input from the selonoid this is already the case but im not 100% sure. they bolt up fine, its just the avcs that posses the problem
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Old 08-15-2012, 12:15 PM   #17
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Quote:
Originally Posted by colorfull View Post
EJ253 in my 05 RS.
you sure about that? the 253 didnt have anything done interally to the motor, the only real difference was the avcs in the heads. the 05 DOES NOT have avcs.

so like said, im 99% sure we got the 251 engine package.
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Old 08-15-2012, 12:48 PM   #18
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Apparently there are 2 versions of the 253? One from '99 and the modern 2.5i.
http://www.rs25.com/forums/f5/t17173...-vs-ej253.html

This thread shows the difference in pistons from the 2.5i block and the 251.
http://www.rs25.com/forums/f5/t16730...k-w-i-avl.html
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Old 08-15-2012, 01:16 PM   #19
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Yes I'm sure as it is written on the block in raised letters.
And no, I don't have variable lift. But I do have the 32bit ECU and DBW.

Quote:
Originally Posted by revin-it02 View Post
you sure about that? the 253 didnt have anything done interally to the motor, the only real difference was the avcs in the heads. the 05 DOES NOT have avcs.

so like said, im 99% sure we got the 251 engine package.
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Old 08-15-2012, 02:05 PM   #20
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Anyways, back to valve springs.... Opinions?
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Old 08-15-2012, 02:19 PM   #21
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Anyone have any advice for me?
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Old 08-15-2012, 02:41 PM   #22
chadr111
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Well regardless of the # on your block, if you don't have the AVLS heads then the AVLS spring are an upgrade and a bargain. That's what I'll be going with when the time comes.

Last edited by chadr111; 08-16-2012 at 01:36 PM.
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Old 08-15-2012, 05:55 PM   #23
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Will avcs springs hold 6600 rpm? If So then I will probably buy them for cheaper than a set of aftermarket ones.
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Old 08-15-2012, 07:21 PM   #24
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Quote:
Originally Posted by Storm View Post
I authored the RS25.com thread.
He also built this motor with those springs.

http://forums.nasioc.com/forums/show....php?t=2362779

Peek power at 6600, red line at 7200 and a much more aggressive cam. While I have zero first hand knowledge (yet), I think you'll be fine. I would like to see some more documented builds with them. Please let us know what you wind up doing and how it works out.
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Old 08-15-2012, 07:48 PM   #25
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Will do man. Where can I find these valve springs? Point me in a direction?
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