| FAQ |
| Members List |
| Social Groups |
| Calendar |
| Search |
| Today's Posts |
|
#1
12-05-2006, 04:11 PM
|
|||
|
|||
Valve Springs
I am needing some information on which valve springs will be best for my application. I have a 1968 pontiac gto with a 400. It is currently an automatic and will be driven as an automatic for about a year, but will be a 4 speed in the future(I have most of the parts collected). It is non A.C., I have an edelbrock intake, edelbrock 750 carb, Summit K2801 cam (summit recommended a crane single spring, which I have heard is junk (#28308-1)), #16 heads, converted to the GM HEI. I am running taylor 8mm plug wires. I also have 3.36 gears in rear. I will be using the car as a street driver that will see a few car shows. I don't want to buy some $200-$300 valve spring kits. My stock ones are weak and I would prefer to go with stock springs again. I saw year one had some valve springs (part #VS6658) However, it shows it for Automatic Transmission. Did they install different valve springs for manual cars? Also, since I got a bigger cam, would it be a good idea to run the H.O. valve springs from year one (Part #AB73) Any ideas. thanks, Justin
|
|
#2
12-07-2006, 05:52 AM
|
|||
|
|||
|
I would use the Crower 68404 springs. They are a good quality, dual spring, designed for the Pontiac stock installed height of 1.600", used by a lot of engine builders. They are also good for 0.550+" lift, if you decide to upgrade to a higher lift cam. There were minor differences in manual/auto engine valve spring specs, but the 68404's will cover a wide range of street cams.
|
|
#3
12-07-2006, 11:20 AM
|
|||
|
|||
|
crower springs
I saw a set of crower springs (68404) from summit for $133. not bad, but I will still probably have to purchase retainers ($66) plus valve stem locks ($45). Or will the stock retainers and valve stem locks work? probably not, but I thought I would ask. thanks, Justin
|
|
#4
12-07-2006, 11:33 AM
|
||||
|
||||
|
Locks will work, retainers not sure?
__________________
Derek B. Current best: 11.97@110 1.65-60' !!! '74 ventura,  (Fired july 14/06) '74 462 4-bolt (9.5-1), SCAT, Ross, T-II w/850DP (shaker455), TH350, Conti 10'' 3800, Supercomps, Magnaflow, 3'' Pypes, 3.73's, 28x13.5-15 ET streets.1970 Beismeyer 17' flatbottom vdrive, 11.8:1 455P, ported heads, dual Qjet tunnel ram. 
|
|
#5
12-10-2006, 05:36 AM
|
|||
|
|||
|
Yes, stock retainers & locks will work with the 68404 springs.
|
|
#6
12-10-2006, 09:02 AM
|
|||
|
|||
|
Like Geoff said, the stock retainers and locks work with no problems. BTW, I've ran 0.560 lift with 68404's and stock retainers/locks for awhile. I believe coil bind on those springs is rated to 0.950. Bryan
|
| Reply |
|
|
The PY Online Forums is the largest online gathering of Pontiac enthusiasts anywhere in the world. Founded in 1991, it was also the first online forum for people to gather and talk about their Pontiacs. Since then, it has become the mecca of Pontiac technical data and knowledge that no other place can surpass.
Linear Mode
