PONTIAC SLP

iTrader: (3)

hey , i bought MS4 but i am puzzled between PAC springs 650 lift and patriot gold springs what of those two springs is better ? and i am planning for 150 spray i will buy 42 injectors , do i need fuel pump or not necessary

thanks

98mysticZ

iTrader: (11)

i had svo 42lbers in mine and had a 150 shot but are you going wet or dry.... i also bought the spring kit from texas-speed that they reccomend with the cam.. and u will need a fuel pump mine is the walbro in tank 255

smokinponcho73

iTrader: (6)

i think it is the patriot gold extremes you will need

PONTIAC SLP

iTrader: (3)

wet with tnt f1 , how about yours wet or dry ? what valve springs is yours ? i ordered from LS1SPEED gold springs and they said they will ship in 1 week , is the fuel pump is necessary or not

PONTIAC SLP

iTrader: (3)

thanks , lets see another posts

skyhighsami

iTrader: (8)

He said that you would need a pump and that he had a Walbro 255

98mysticZ

iTrader: (11)

i used the prc springs and i was on a dry shot

Prerun4fun13

iTrader: (6)

I have the Patriot Dual golds. I like them because they come with Super 7 locks which are twice the size of the PRC locks.

dankl

iTrader: (1)

might not need the fuel pump, but most likely you will. So might as well get it done and outta the way. I needed a fuel pump with much less cam than the MS4...

sidewayz28

iTrader: (24)

patriot golds, Racetronix plug and play, 39# injectors...wet shot

Jason 98 TA

iTrader: (4)

We use the PRC platinum spring kits with the MS4 combos that ship from this shop. You have to be pretty careful picking a spring kit because not every spring kit is the same. We build the PRC retainers & seats in the U.S. While that doesn't sound important, it really is. A lot of the imported seats being used by other manufacturers have varied by .030"+ on install height from one valve job to another!!

This could really cause a huge problem when your trying to run a cam near the max useable lift of a valve spring.

dankl

iTrader: (1)

^^^very true. Good point for the OP

miller456

iTrader: (36)

Im not sure if you ever stated if you are m6 or a4? with a spring only rated at a .650 lift and with the info Jason just provided you will be pushing that spring to the max. I hope that if you are manual you never mechanically over rev and if you are auto your shift points are set to the T. I would go with the PRC kit since it seems to be the most commonly used with the ms4 combos. I personally run the PRC kit while it may be a little pricey, it cost much less than a spun rod bearing or other problems like a spring failing and ptv slap.

Oh and Jason your car has some sick dyno number's especially from a mustang dyno, that thing has to be a lot of fun

dankl

iTrader: (1)

+1 on that. Jealous of the Twin Turbo Vette

PONTIAC SLP

iTrader: (3)

thanks guys and special thanks for u jason , i'll talk to Bryan at ls1speed about the valve springs .

PONTIAC SLP

iTrader: (3)

i talked with Bryan @ LS1SPEED he said i should run with patriot extreme springs for MS4

LSWNDR

sidewaysz-28 said it my friend for sure