Crane 10308 spring kit for LT1s
06-01-2002, 10:29 AM
#1
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Join Date: Jul 1999
Location: Robinson, IL
Posts: 1,041
Crane 10308 spring kit for LT1s
For those who have installed the Crane Spring kit for alum headed LTs (W/ P/N 99893 dual springs), are they a direct install with no other modifications (i.e. seat change, machining)? I thought I heard a comment once that the seats/seals would need to be changed.
What has been your experience with these springs? Do you recommend them?
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HurstM6/CNC heads/11:1cr/SS 2”valves/Crower SS 1.6rr/HD rods/Crane2033 Cam/HPP+w/module & 160stat/52mm TB/SLPafpr/1LE bellows airfoil/G2 breather/aluminum valve covers/Magnecor 8.5mm wires/MSD Digital6+/SLP 1.75”ss coated hdrs/ss Y-pipe w/2 Random cats/LPE 3.5”shaft/pulleys/LT4km/ K&N/Torsen/poly stuff/ SLP pp, flywheel w/McLeod disc/GM3.73 gears/LS1 brakes/ HotchkisLCA&STB/348rwHP/348rwTQ-corrected
What has been your experience with these springs? Do you recommend them?
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HurstM6/CNC heads/11:1cr/SS 2”valves/Crower SS 1.6rr/HD rods/Crane2033 Cam/HPP+w/module & 160stat/52mm TB/SLPafpr/1LE bellows airfoil/G2 breather/aluminum valve covers/Magnecor 8.5mm wires/MSD Digital6+/SLP 1.75”ss coated hdrs/ss Y-pipe w/2 Random cats/LPE 3.5”shaft/pulleys/LT4km/ K&N/Torsen/poly stuff/ SLP pp, flywheel w/McLeod disc/GM3.73 gears/LS1 brakes/ HotchkisLCA&STB/348rwHP/348rwTQ-corrected
06-01-2002, 08:05 PM
#3
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Join Date: Jul 2001
Location: Wichita Falls,Texas
Posts: 718
Well the only issuses i have had with them were the seats. They just come with shims to replace the stock seats. But the problem is the shims let the spring walk around on the heads a high rpms. I had bought some seats for them and had them machined so i could sill achieve the right spring pressures. I would recomend you change the valve seals also just for some added insurance they are only $10. HTH
Joe
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94 Z M6
EGR! AIR! and some Sticky Tires!!!
[This message has been edited by Smoke T/A (edited June 03, 2002).]
Joe
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94 Z M6
EGR! AIR! and some Sticky Tires!!!
[This message has been edited by Smoke T/A (edited June 03, 2002).]
06-01-2002, 08:15 PM
#4
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Join Date: May 2001
Location: Rockledge, Florida USA
Posts: 159
I'm running the 10308 spring kit on stock heads. As previously mentioned, the stock seats are to be replaced with the 10308-supplied "seats" which are really "shims". Using these enabled me to obtain the correct installed height, but I really don't like the idea. They just seemed flimsy for "seats". I must admit that I haven't had any trouble with them, at least not that I can tell. As far as the springs "walking"...I'm not sure, but I'm not reving past the stock limits anyway.
Replacing the valve seals is definitely good advice. Also, make sure whatever spring compressor you plan to use will be able to grab and compress both springs in the 10308 kit. I had to mod the one I had so the inner spring wouldn't pop loose while compressed.
In addition, I had Crane 1.6 RRs and had to grind on them a bit. They were rubbing on the outer edge of the spring retainer. I hear some folks have this problem, while others don't.
Hope this helps,
RobY
95 Z28
Replacing the valve seals is definitely good advice. Also, make sure whatever spring compressor you plan to use will be able to grab and compress both springs in the 10308 kit. I had to mod the one I had so the inner spring wouldn't pop loose while compressed.
In addition, I had Crane 1.6 RRs and had to grind on them a bit. They were rubbing on the outer edge of the spring retainer. I hear some folks have this problem, while others don't.
Hope this helps,
RobY
95 Z28
06-02-2002, 08:03 PM
#5
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Join Date: Jul 1999
Location: Robinson, IL
Posts: 1,041
<font face="Verdana, Arial" size="2">Originally posted by ryaskovic:
I'm running the 10308 spring kit on stock heads. As previously mentioned, the stock seats are to be replaced with the 10308-supplied "seats" which are really "shims". Using these enabled me to obtain the correct installed height, but I really don't like the idea. They just seemed flimsy for "seats". I must admit that I haven't had any trouble with them, at least not that I can tell. As far as the springs "walking"...I'm not sure, but I'm not reving past the stock limits anyway.
Replacing the valve seals is definitely good advice. Also, make sure whatever spring compressor you plan to use will be able to grab and compress both springs in the 10308 kit. I had to mod the one I had so the inner spring wouldn't pop loose while compressed.
In addition, I had Crane 1.6 RRs and had to grind on them a bit. They were rubbing on the outer edge of the spring retainer. I hear some folks have this problem, while others don't.
Hope this helps,
RobY
95 Z28</font>
I'm running the 10308 spring kit on stock heads. As previously mentioned, the stock seats are to be replaced with the 10308-supplied "seats" which are really "shims". Using these enabled me to obtain the correct installed height, but I really don't like the idea. They just seemed flimsy for "seats". I must admit that I haven't had any trouble with them, at least not that I can tell. As far as the springs "walking"...I'm not sure, but I'm not reving past the stock limits anyway.
Replacing the valve seals is definitely good advice. Also, make sure whatever spring compressor you plan to use will be able to grab and compress both springs in the 10308 kit. I had to mod the one I had so the inner spring wouldn't pop loose while compressed.
In addition, I had Crane 1.6 RRs and had to grind on them a bit. They were rubbing on the outer edge of the spring retainer. I hear some folks have this problem, while others don't.
Hope this helps,
RobY
95 Z28</font>
What brand spring compressor works with dual springs? I have a Lisle brand spring compressor. It worked ok with single spring and dampner, but I don't know about duals
Does anyone have a recommendation on brand/type of valve seal to use?
It sounds like you've had good experience with the Crane springs. I think I'll try them. Any other comments or advice?
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HurstM6/CNC heads/11:1cr/SS 2”valves/Crower SS 1.6rr/HD rods/Crane2033 Cam/HPP+w/module & 160stat/52mm TB/SLPafpr/1LE bellows airfoil/G2 breather/aluminum valve covers/Magnecor 8.5mm wires/MSD Digital6+/SLP 1.75”ss coated hdrs/ss Y-pipe w/2 Random cats/LPE 3.5”shaft/pulleys/LT4km/ K&N/Torsen/poly stuff/ SLP pp, flywheel w/McLeod disc/GM3.73 gears/LS1 brakes/ HotchkisLCA&STB/348rwHP/348rwTQ-corrected
06-02-2002, 08:16 PM
#6
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Join Date: May 2001
Location: Rockledge, Florida USA
Posts: 159
I'm not sure which brand spring compressor will work. I used whatever one I could find locally and modified it to work (out of despiration).
I used Crane valveseals. I hadn't ever had any problems with the stockers though.
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RobY
95Z28
I used Crane valveseals. I hadn't ever had any problems with the stockers though.
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RobY
95Z28
06-03-2002, 11:18 AM
#7
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Join Date: Jul 1999
Location: Robinson, IL
Posts: 1,041
Thanks, Rob. I might just try the Crane seals. I think I'll start a new thread on the spring compressor to get others comments.
Anyone else have experience with the Crane 10308 spring kit?
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HurstM6/CNC heads/11:1cr/SS 2”valves/Crower SS 1.6rr/HD rods/Crane2033 Cam/HPP+w/module & 160stat/52mm TB/SLPafpr/1LE bellows airfoil/G2 breather/aluminum valve covers/Magnecor 8.5mm wires/MSD Digital6+/SLP 1.75”ss coated hdrs/ss Y-pipe w/2 Random cats/LPE 3.5”shaft/pulleys/LT4km/ K&N/Torsen/poly stuff/ SLP pp, flywheel w/McLeod disc/GM3.73 gears/LS1 brakes/ HotchkisLCA&STB/348rwHP/348rwTQ-corrected
Anyone else have experience with the Crane 10308 spring kit?
------------------
HurstM6/CNC heads/11:1cr/SS 2”valves/Crower SS 1.6rr/HD rods/Crane2033 Cam/HPP+w/module & 160stat/52mm TB/SLPafpr/1LE bellows airfoil/G2 breather/aluminum valve covers/Magnecor 8.5mm wires/MSD Digital6+/SLP 1.75”ss coated hdrs/ss Y-pipe w/2 Random cats/LPE 3.5”shaft/pulleys/LT4km/ K&N/Torsen/poly stuff/ SLP pp, flywheel w/McLeod disc/GM3.73 gears/LS1 brakes/ HotchkisLCA&STB/348rwHP/348rwTQ-corrected
06-03-2002, 11:22 AM
#8
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Join Date: Jul 2001
Location: Wichita Falls,Texas
Posts: 718
<font face="Verdana, Arial" size="2">Originally posted by ryaskovic:
I'm not sure which brand spring compressor will work. I used whatever one I could find locally and modified it to work (out of despiration).
I used Crane valveseals. I hadn't ever had any problems with the stockers though.
</font>
I'm not sure which brand spring compressor will work. I used whatever one I could find locally and modified it to work (out of despiration).
I used Crane valveseals. I hadn't ever had any problems with the stockers though.
</font>
Later
Joe
06-03-2002, 10:52 PM
#10
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Join Date: Sep 1999
Location: Homer Glen, IL
Posts: 25
Don, I have 10308-1 springs. Do yourself a huge favor, and get stock L98 spring seats. They fit perfectly inside the inner spring, and prevent the 10308's from walking on the head. I have the L98 seats on my ride and ZERO spring walk. Plus, the seats are cheap.
These are far superior to the cheap-@ss shims supplied by Crane. It's a wonderful convenience the L98 seats work, and very well.
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1994 Formula, Black, Ported stock heads with Manley race flow valves, and Crane 10308-1 springs, CC Xtreme 224/230/112 cam, TPIS 1-3/4 headers, Moroso CAI, Hooker cat-back, GM 4.10s, Hurst, short stick, blackouts, Polished WS6 wheels, ASPulley, Talyor wires over-the-valve covers, 1LE elbow, Clutchnet disc, LT4 PP, 285/40/17 SZ50s on 4 corners
These are far superior to the cheap-@ss shims supplied by Crane. It's a wonderful convenience the L98 seats work, and very well.
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1994 Formula, Black, Ported stock heads with Manley race flow valves, and Crane 10308-1 springs, CC Xtreme 224/230/112 cam, TPIS 1-3/4 headers, Moroso CAI, Hooker cat-back, GM 4.10s, Hurst, short stick, blackouts, Polished WS6 wheels, ASPulley, Talyor wires over-the-valve covers, 1LE elbow, Clutchnet disc, LT4 PP, 285/40/17 SZ50s on 4 corners
06-04-2002, 06:38 AM
#12
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Thread Starter
Join Date: Jul 1999
Location: Robinson, IL
Posts: 1,041
<font face="Verdana, Arial" size="2">Originally posted by Ed_H:
Don, I have 10308-1 springs. Do yourself a huge favor, and get stock L98 spring seats. They fit perfectly inside the inner spring, and prevent the 10308's from walking on the head. I have the L98 seats on my ride and ZERO spring walk. Plus, the seats are cheap.
These are far superior to the cheap-@ss shims supplied by Crane. It's a wonderful convenience the L98 seats work, and very well.
</font>
Don, I have 10308-1 springs. Do yourself a huge favor, and get stock L98 spring seats. They fit perfectly inside the inner spring, and prevent the 10308's from walking on the head. I have the L98 seats on my ride and ZERO spring walk. Plus, the seats are cheap.
These are far superior to the cheap-@ss shims supplied by Crane. It's a wonderful convenience the L98 seats work, and very well.
</font>
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HurstM6/CNC heads/11:1cr/SS 2”valves/Crower SS 1.6rr/HD rods/Crane2033 Cam/HPP+w/module & 160stat/52mm TB/SLPafpr/1LE bellows airfoil/G2 breather/aluminum valve covers/Magnecor 8.5mm wires/MSD Digital6+/SLP 1.75”ss coated hdrs/ss Y-pipe w/2 Random cats/LPE 3.5”shaft/pulleys/LT4km/ K&N/Torsen/poly stuff/ SLP pp, flywheel w/McLeod disc/GM3.73 gears/LS1 brakes/ HotchkisLCA&STB/348rwHP/348rwTQ-corrected
06-04-2002, 09:44 PM
#14
Registered User
Join Date: Sep 1999
Location: Homer Glen, IL
Posts: 25
I personally didn't have problems with spring walk because the L98 seats were installed right off the bat. Many people have been successful with the shims, many haven't. The L98 seats, with their lip that fits perfectly into the inner spring of the 10308-1, is cheap insurance. I don't have the GM part number anymore, sorry.
DaveW might be able to give you some first-hand experience. I know this was discussed in detail about 2 years ago - when I installed my cam / heads.
Anyone else have info for Don??
DaveW might be able to give you some first-hand experience. I know this was discussed in detail about 2 years ago - when I installed my cam / heads.
Anyone else have info for Don??
06-10-2002, 10:09 AM
#15
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Join Date: Jul 1999
Location: Robinson, IL
Posts: 1,041
<font face="Verdana, Arial" size="2">Originally posted by Ed_H:
I personally didn't have problems with spring walk because the L98 seats were installed right off the bat. Many people have been successful with the shims, many haven't. The L98 seats, with their lip that fits perfectly into the inner spring of the 10308-1, is cheap insurance. I don't have the GM part number anymore, sorry.
DaveW might be able to give you some first-hand experience. I know this was discussed in detail about 2 years ago - when I installed my cam / heads.
Anyone else have info for Don??</font>
I personally didn't have problems with spring walk because the L98 seats were installed right off the bat. Many people have been successful with the shims, many haven't. The L98 seats, with their lip that fits perfectly into the inner spring of the 10308-1, is cheap insurance. I don't have the GM part number anymore, sorry.
DaveW might be able to give you some first-hand experience. I know this was discussed in detail about 2 years ago - when I installed my cam / heads.
Anyone else have info for Don??</font>
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HurstM6/CNC heads/11:1cr/SS 2”valves/Crower SS 1.6rr/HD rods/Crane2033 Cam/HPP+w/module & 160stat/52mm TB/SLPafpr/1LE bellows airfoil/G2 breather/aluminum valve covers/Magnecor 8.5mm wires/MSD Digital6+/SLP 1.75”ss coated hdrs/ss Y-pipe w/2 Random cats/LPE 3.5”shaft/pulleys/LT4km/ K&N/Torsen/poly stuff/ SLP pp, flywheel w/McLeod disc/GM3.73 gears/LS1 brakes/ HotchkisLCA&STB/348rwHP/348rwTQ-corrected