On the lookout for a bit stronger valvesprings for my Ecotec head (Z22SE/Saab) and noticed Dilbert also makes a set:
http://www.dbilas-sh...16V-Z22SE::7189
Anybody know their quality? Single spring 93Kp, but not much more info.
Supertech 78lb is the common choice, but looking for some alternatives...
Dbilas Valve Springs Z22Se
Started by
Exmantaa
, Mar 15 2012 07:58 PM
12 replies to this topic
#2
slindborg
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Posted 15 March 2012 - 08:33 PM
Are the dilbert ones a grand? Lol
#3
Exmantaa
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#4
smiley
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Posted 15 March 2012 - 10:45 PM
It's Dimitri 
#5
vocky
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Posted 16 March 2012 - 12:47 PM
you MUST grind the roller rockers if you plan on using the supertech spring kit, they changed the design and the clearance between the roller rocker and valve spring retainer becomes a major issue 
#6
Exmantaa
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Posted 16 March 2012 - 03:43 PM
Yes, I know the clearance issue with the Supertech Ti retainers...
Those DBilas are single spring, direct fit and standard retainers. Supposedly good for 8000rpm, but need more info on coil bind and installed seat pressure as the 93kp (= lb?) seems a tad high for my non-race engine...
(Edit; is it anyway possible to shim the std springs for a higher seat pressure? Need to do some measurements.)
Edited by Exmantaa, 16 March 2012 - 03:45 PM.
#7
Steffen
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Posted 16 March 2012 - 03:53 PM
I have them, together with another cam.
Works fine.
#8
Exmantaa
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Posted 16 March 2012 - 04:48 PM
I have them, together with another cam.
Works fine.
Sounds good, but I see you ride a Turbo so I assume that has a different spring kit fitted.
The Z22SE Ecotec does have a bit of a clearance issue...
#9
vocky
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Posted 16 March 2012 - 04:50 PM
dbilas turbo kit on a z22se 
#10
2-20
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Billy No Mates
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Posted 16 March 2012 - 05:24 PM
ZZPerformance also sell a single spring at 78 lbs
#11
Taz6622
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Posted 16 March 2012 - 07:16 PM
I have a dbilas turbo kit on a z22se and yes it is:)
#12
slindborg
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Posted 16 March 2012 - 08:30 PM
dbilas turbo kit on a z22se
Only dilbert can make webCON look cheap lol
#13
Exmantaa
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Posted 01 April 2012 - 07:33 PM
Found a bit more info regarding the DBilas springs, but can someone confirm the REAL install height of the standard Ecotec valvesprings?
On the net and also in the GM buildbook this height is said to be 1.210" (30.7mm).
We did some measurements today on installed springs on a Saab head and found 35.2 to 35.4mm total height (varies). Top retainer is ~1.9mm and bottom seal-dish is 0.9mm. So worst case the install height is 35.2 - 1.9 - 0.9mm = 32.4mm.
This is the same as the spec I now got from DBilas:
- Closed seat pressure 35Kp (77lbs) @ 32.5mm.
- 86Kp (190lbs) @ 11mm lift.
- Coil bind/block length 20,5mm.
Sounds like a decent set of springs if you don't intend to run very high lift cams.
On the net and also in the GM buildbook this height is said to be 1.210" (30.7mm).
We did some measurements today on installed springs on a Saab head and found 35.2 to 35.4mm total height (varies). Top retainer is ~1.9mm and bottom seal-dish is 0.9mm. So worst case the install height is 35.2 - 1.9 - 0.9mm = 32.4mm.
This is the same as the spec I now got from DBilas:
- Closed seat pressure 35Kp (77lbs) @ 32.5mm.
- 86Kp (190lbs) @ 11mm lift.
- Coil bind/block length 20,5mm.
Sounds like a decent set of springs if you don't intend to run very high lift cams.
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