All Small Six 200 valve springs
- Thread starter alwill923
- Start date
This relates to all small sixes
Wouldn't the Crower 68147 springs which have a 1.00" ID fit the stock retainers?
fast64ranchero
Well-known member
I have them on my alum head, but I have extended length valves and my installed height is now 1.8"
Engine Fan
Well-known member
Last edited:
Engine Fan
Well-known member
The 66 200 head I tried one with the mopar retainer and ford locks.
The base of the spring fit the locator in the head perfectly and the 200 locks appear to fit the mopar retainer good.
The base of the spring fit the locator in the head perfectly and the 200 locks appear to fit the mopar retainer good.
Last edited:
What's the part number for the mopar retainer?
Engine Fan
Well-known member
Mopar retainer: 4483745
Mopar spring: 4483859
These part #'s are listed for 1990 to 2000 3.3v6
Last edited:
Would an umbrella valve stem seal fit under the beehive top or is a vitton seal a must?
Inspired by this thread, I ordered two beehive versions from rockauto, the 4781588AC and the ERV2498. The have the same dimensions, but do not fit on an unmodified log head. The inner diameter of the base is 0.831” as stated in the datasheet, so the beehive spring that Egine Fan postet a picture of has to be a different one. To fit these springs the spring seat would need to be machined.
I also got a valve spring pressure tester and tested some springs I have at home for future reference. All springs are out of the box and unused. I measured 3 pieces of each spring, in the table you see the average numbers. The measurements at 1.67“ and 1.28“ are my specific installed and open height on my cylinder head.
These are the numbers I measured:
VALVE SPRING | Manufacturer reference | Spring force (measured) | Spring rate (calculated) | Weight (measured) | Retainer with weight |
Sealed Power 6513-1 (single spring) | B6A-6513-A | installed height 1.67 --> 92 lbs installed height 1.28 --> 183 lbs | ~234 lbs/in | 0.165 lbs | Ford E6TZ-6A536-A 0.052 lbs |
Comp Cams 903 (single spring) | SKU 903-12 | installed height 1.67 --> 89 lbs installed height 1.28 --> 193 lbs | ~267 lbs/in | 0.166 lbs | Ford E6TZ-6A536-A 0.052 lbs |
Mopar 4781588AC | 4781588AC | installed height 1.67 --> 81 lbs installed height 1.28 --> 167 lbs | ~221 lbs/in | 0.121 lbs | Mopar 4781090AA 0.024 lbs |
Enginetech ERV2498 | ERV2498 | installed height 1.67 --> 83 lbs installed height 1.28 --> 177 lbs | ~241 lbs/in | 0.115 lbs | Enginetech VSR705 0.024 lbs |
Melling VS-1282 | VS-1282 | installed height 1.67 --> 79 lbs installed height 1.28 --> 177 lbs | ~251 lbs/in | 0.156 lbs | 4483745 0.026 lbs |
I will report back on installed height of the normal one piece retainer to the beehive retainer, if it changes the installed height.
Last edited:
It looks like I opened a can of worms. I actually measured my installed height and it is 1.592. I do not plan on cutting the head for a greater installed height. Yes, I could use a +50 retainer if available. I appreciate all the responses. The problem is getting the springs, retainers and keepers all from the same company. The part numbers exist but the items are not available. comp cams 903 spring would work well but comp does not have a retainer for them. I plan on using the springs listed above that I measured for now. Again thanks for all the replies.
Hey alwill923, the claysmith one piece retainer (SKU: 8617-12) will work with the compcams 903 springs, I also test fitted them. They are slightly heavier than the Ford E6TZ-6A536-A but still lighter than the original retainer assembly.
Just for your information if you want to go with the 903 springs...
Just for your information if you want to go with the 903 springs...
The Comp 903 spring will have a 111 lb seat pressure at 1.592" and 234 lbs open at .420" valve lift.
The Comp 903 spring is the stock replacement spring for the 240/300 six and fits the stock 240/300 retainer.
That's why Comp doesn't supply a retainer for the 903 spring.
I think that in the end the Crower 68147 springs with the stock retainers that you already have are the cheapest way to go even at $100.
Last edited:
Engine Fan
Well-known member
Mopar changed the valve springs and retainers starting in 2001. My apologies for the misinformation. The 1990 to 2000 springs and retainers will fit.
I have updated my previous posts on these springs(4483859)or (melling VS-1282), and retainer (4483745)
The Melling spring is listed with some specs at Summit Racing
Last edited:
I just got the right beehive springs (Melling VS-1282), they do fit perfectly onto the cylinder head. The top part of the spring has a slightly greater inner diameter than the Enginetech ERV2498, so the Mopar 4781090AA retainer and Enginetech VSR705 retainer fit a bit loose. I'm still waiting on the 4483745 retainer to see if this one sits tighter on the spring top.
I updated the table in post #31 with the Melling VS-1282 numbers...
Last edited:
The 4483745 retainer fit the valve locks perfectly, but the result in a .078" lower installed heigth of the beehive valve spring compared to the normal spring.
My installed height with Ford E6TZ-6A536-A retainer and conventional spring: 1.67"
My installed height with the 4483745 retainer and the Melling VS-1282 beehive spring: 1.59"
PS: I added the weight of the 4483745 retainer in the table in post #31
My installed height with Ford E6TZ-6A536-A retainer and conventional spring: 1.67"
My installed height with the 4483745 retainer and the Melling VS-1282 beehive spring: 1.59"
PS: I added the weight of the 4483745 retainer in the table in post #31
Last edited:
interesting
