Valve Springs and Cams that work

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Antifreeze2
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Posts: 112
Joined: October 15th, 2011, 6:33 pm
Stroker Displacement: 280 ci
Vehicle Year: 1997
Vehicle Make: Jeep
Vehicle Model: Wrangler
Location: Central Illinois

Re: Valve Springs and Cams that work

Post by Antifreeze2 »

It works!!! At least I hope. Should be fine, ya?

53021676ab averaged about .630 ID, .890 OD, 9 grams
The comp spring has a .650 ID(top), 1.013 OD (top), 47.5 grams


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Retlaw01XJ
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Posts: 307
Joined: November 23rd, 2011, 10:40 pm
Stroker Displacement: 4.6
Vehicle Year: 2001
Vehicle Make: Jeep
Vehicle Model: Cherokee

Re: Valve Springs and Cams that work

Post by Retlaw01XJ »

I take it those aren't Jeep valves?
My 2001 has the 3 groove keepers, I'm not familiar with what the earlier single-groove ones look like.
Jeeps have 8 degree keepers, correct? ...and you're using 10 degree for those valves? What are they from?

I like the beehive option. But I'm past the point of sending the head back out to have it machined for springs.

It appears performance cams require more seat pressure than stock to keep the valve from bouncing off the seat. I'd guess cams with faster open/close rates like the Comp extreme series need more pressure than a milder cam.
Open pressure appears to be related to preventing valve float at high rpm's. Valve train weight comes into play as well..... heavier components need more spring pressure to keep things under control.
Would you guys agree with those statements?
Walt K
Eastern Pa
2001 Cherokee 4.6 stroker 90 day build
Buick GS's and Saab turbos for other days...
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Antifreeze2
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Posts: 112
Joined: October 15th, 2011, 6:33 pm
Stroker Displacement: 280 ci
Vehicle Year: 1997
Vehicle Make: Jeep
Vehicle Model: Wrangler
Location: Central Illinois

Re: Valve Springs and Cams that work

Post by Antifreeze2 »

I would agree. I'm using a 93 7120 head, which came with single groove keepers. The valves I am using are aftermarket Magnum oversize 2.020/1.620. They are a bit longer than the stock ones for my 97, but I threw away the original valves so I can't compare. The keepers are 8* Mopar (bought them blind on ebay for $12) which work with the hemi retainer.
604rail_king
I made it to triple digits!
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Joined: November 27th, 2011, 9:24 pm
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Re: Valve Springs and Cams that work

Post by 604rail_king »

Good work. Now it's time to get the new setup installed in the head and measure up the cc to see how it's changed (if any)
JeepFamily
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Stroker Displacement: 4.7
Vehicle Year: 1997
Vehicle Make: Jeep
Vehicle Model: ZJ
Location: Butte Montana

Re: Valve Springs and Cams that work

Post by JeepFamily »

I've been participating in the thread with great interest and am suprised how many options there are and even more suprised there isn't a solution from one of the cam suppliers :banghead:. Mopar Performance provides springs that would work but at $250. In my search, I reread Dino's site and found he had switched back to the stock cam and was able to generate 200 HP at the rear wheels or 5 ponies more than the original engine, pretty good. what might happen if an OEM cam was used while increasing the rocker ratio from stock of 1.6 to 1.7? lift would be increased allowing this beast to breath better. I would still be within the range of $6-$7 dollar ea springs P4529214 or P4529215 Image. This would increase the intake from 0.408" to 0.434" and exhaust from 0.414" to 0.440". Based on the Mopar chart we should be fine, right? Thoughts anyone on whether this would work or even provide benefit?
JeepFamily (Rob)
1997 ZJ 4.7 Stroker
2000 WJ Limited (Totaled)
2002 WJ Limited 4.7HO (Sold)
2003 WJ Overland 4.7HO
2005 WK Limited (sold)
1997 ZJ Orvis 5.2 Up Country(48K miles)
1997 ZJ Laredo (parting out)
1998 ZJ Limited 5.9
Wrangler Want-ta-get-one
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