mrick101

Im running the hotcam with the lt4 heads and intake manifold. Also the 1.6 rockers. I want to start pushing more rpm say 6000to6200 what springs can i use that are direct swaps where i can reuse the seats and locks. Pac 1212x or something to that nature. Thanks guys

KW Baraka

iTrader: (7)

Crane Spring kit 10308-1.

I suppose you could just get the springs and not the whole kit......

http://www.jegs.com/InstallationInst...70-10308-1.pdf

KW

lt1-xjs

Howards 98215 springs, just pull the damper out.

350 groundpounder

iTrader: (5)

Pac 1218 or 1518's springs. Read about PAC springs, great track record!

Casey96SS

I have a set of PSI 1511 Springs with 600 miles on them sitting in my garage I would let go for a good price. Not sure if they would work for your application but they had good reviews as far as beehive springs go.

mrick101

Howard looks good but some say they have to clearance lt1 heads although i have lt4 heads may be different.pac1218. List as a ls1 drop on spring

350 groundpounder

iTrader: (5)

Pac 1218's are like the comp cams 918's but a better quality. Mine dropped right on my stock lt1 heads without any machine work and will work good for .533 lift cam like mine, or the .525 lift hotcam. If Lloyd uses them on his heads you know they are good springs.

BALLSS

I know the Crane spring mentioned, 10308-1, is plug & play install for Aluminum heads LT1/4. May not be the cheapest spring one could use. I have set of the "10309" on my iron head Carburetor LT1

The Crane kit does come with retainers and new locks although you could re-use the stock 7 degree locks.

https://www.summitracing.com/parts/c...08-1/overview/

IDK if you can just buy the springs themselves and if the retainers of the LT4 spring are the same size. If your intent is to try and re-use your LT4 retainers/locks than you will need a spring with the same ID

I have heard good reports on Howards, PAC & Alex springs but never run those

I have the Lunati 73925K5 kit which is a VERY nice spring but may be more spring than you need for the Hot cam. Got them from lloyd elliott

lt1-xjs

The Howard spring is a drop in using the stock hardware. That's why you remove the damper.
The Pac springs are beehives so you will need retainers also.
Cranes 10308-1 is a double spring and would require the kit.
I have the Comp 26918 on my car with the 787 retainer, stock spring seats and stock locks.

mrick101

Thanks guys that why i come here.

BALLSS

so did I....but at 20k mi I found this (pic) which is why I changed to the Lunati doubles. Unfortunately for me the Comp 918 joined several others who had them break. Fortunately I had no engine/valve train carnage as a result. The retainer held the spring together until I removed it to check it just as a precautionary check at 20k mi. Hope yours work out better.

FWIW the 26918 were spec on my cam card. I used the 918 specific locators, retainers and new 7 degree locks. Heads did have spring pockets machined down to allow a 1.800" (spec) installed height. Cam lift .570 int/.565 exh.

joelster

Call Comp and make sure you tell them the batch number. I had a set of 918's and 1 of them broke. They sent out 2 replacements. Maybe they can do the same for you? My springs were from 2007 or so.

pantera_efi

iTrader: (1)

Hi, I too have many broken Comp valve springs, ones from engines brought here for freshening.

I have my own springs made for this LT-4 use.
This spring kit can be had with a "TiT" upgrade.
The Spring Kit has a very fair price.

Just send me an E-Mail, RFQ.

Lance

BALLSS

I did call Comp when my spring broke. I had receipt and the box with batch # (I posted the pic). Comp said my springs were no longer under any warranty due to the length of time I had them, not the miles on the spring even though my batch # had been reported many times as having issues.

I had already made the decision to replace them with the Lunati kit and did not know one spring was in fact broken until I removed them for the swap

Generally when a bee hive (single) spring does break it causes significant, if not fatal, engine damage. I was fortunate to discover my issue before that happened. If my spring had broken further down....boom on my motor.

Now having double springs (and way better ones IMHO) if one should break the inner spring should hold the valve up from hitting the piston.

When I was discussing spring options with Lloyd Elliott he advised he won't use Comp bee hives at all. He has seen to many of them break

Is every motor running the 918's in LT1 motors going to fail, no. But IMHO a significant amount of them compared to other brands/types of springs seems to be clear there is a larger proportion of 918 failures