Valve Springs
Valve Springs So I was thinking with the 150k miles on my engine, it might be a good time to freshen up the valve springs. Car is a 93 Z28. I have no issues, but I want to also do the valve seals, so I figure why not new springs and keepers? Is it ok to run LT4 springs on the engine as it sits?
Thanks!
Thanks!
LT4 springs work with the stock retainers and are a good replacement for high mile stock springs. If you went to the dealer for new LT1 springs they would give you LT4 springs.
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LT4 springs were designed for lighter, sodium filled, LT4 valves. IMHO given the effort it takes to swap springs I would go with a better spring. Crane 10308-16 would be plug & play
The LT4 spring "new" may be slightly better than "old" LT1 springs...but with the heavier LT1 valves not a long term "upgrade"
The LT4 spring "new" may be slightly better than "old" LT1 springs...but with the heavier LT1 valves not a long term "upgrade"
Yes, I would use those in a heartbeat if you're sticking with the stock cam.
I've used them on a couple of engines with ZZ3/ZZ4 cam revving to 6000.
For your application, they're as good of quality as you'll get from ANY aftermarket source.
No need to replace retainers and keepers.
Here....$42 shipped: http://www.ebay.com/itm/like/141383895366?lpid=82
I've used them on a couple of engines with ZZ3/ZZ4 cam revving to 6000.
For your application, they're as good of quality as you'll get from ANY aftermarket source.
No need to replace retainers and keepers.
Here....$42 shipped: http://www.ebay.com/itm/like/141383895366?lpid=82
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Verdad Gallardo No. Anything beyond the stock cam with an LT1 intake manifold will need to rev more than 6000 to fully utilize the cam's powerband. I wouldn't try to use those springs over 6k with stock weight valves.
Ok, thanks again!! Got a line on a set of used headers and a Y.... TPIS brand from a forum member...once we work something out, Im ordering the springs and seals. Just thinking its better to do everything at once. I have the fitting/ air hose kit for the spark plug bores, so Ill do them on the car.
One poster got into discussing the LT1 valves being heavier than LT4 and that is true but is really only relevant when we are explaining why not to use LT4 springs with the HOT cam on an LT1.
As most have said the LT4 springs are great for an LT1 cam.
Far as future upgrades, valvesprings are a wear item, never buy springs to use now when looking to cam in the future.
As most have said the LT4 springs are great for an LT1 cam.
Far as future upgrades, valvesprings are a wear item, never buy springs to use now when looking to cam in the future.
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Joined: Apr 2008
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another option people have used is the Alex spring kit for AL heads
http://www.alexsparts.com/lt1-valve-...rs-locks-cups/
if just sticking with a stock cam, tune and rockers and $ are a concern than the GM LT4 springs are fairly cheap
http://www.summitracing.com/parts/na...5494/overview/
use a Viton full jacket valve stem seal. FelPro has them as does Alex on his site. Note he also sells them individually as you can tear them sometimes accidently on install so having one or two extra may come in handy for just a few $
Thanks a million guys. I kinda like the LT1 springs. $123.00 for the springs,retainers,locks and seals seems very reasonable to me. I spend much more on my LS6 springs when I bought those...seals alone were like $55.00 for that engine...
I am sure the Alex parts are quality springs BUT they have way more pressure than needed which is wasted power, and LT4 springs would reuse the stock retainers, locks etc saving a lot of money.
Like I said, don't buy springs for future upgrades as they are a wear item with aftermarket cams.
Like I said, don't buy springs for future upgrades as they are a wear item with aftermarket cams.