Take a look at this. Making bc springs stiffer!

[srdub-t]

so after debating for a long time and researcing about spending the extra cash for supertech dual springs or staying with the bc springs i already have. I came across this info that i got from the guys at brian crowers shop:The tech that works there said that he would recommend shimming the valve spring install height to 1.500” which would give you 105 lbs valve closed and 235 lbs valve open.

What are your guys thoughts on this? Sounds apealing to me. Supertech springs put like 116 lbs on the seat.

[srdub-t]

no one has thought on this?

[codyace]

Run stock springs with JWT cams and save the headache

[srdub-t]

hah yea but this is for a 500 hp build. Im using high lift cams 270 with 12.5 lift. Possibly revving to 9K so.... U guys think that the bc spring will do it with this shimming proccess

[inkslingers13]

not to thread jack, but could you shim stock spring to do the same thing? free bump!

[srdub-t]

i see in your sig that you need injectors i got deatchwerks 650cc for sale with only like 250 miles on them pretty much bran new

[codyace]

500 hp?

Get the JWT spring and retainer kit, and their C series race cams. You'll be happy

Also with that 9k, are you going with a Solid valvetrain? Maybe want to ensure that the upped seat pressure will be koesher with the SLA's....

[inkslingers13]

500 hp?

Get the JWT spring and retainer kit, and their C series race cams. You'll be happy

Also with that 9k, are you going with a Solid valvetrain? Maybe want to ensure that the upped seat pressure will be koesher with the SLA's....

very good point

[srdub-t]

im goin wi supertech dual springs and retainers, tomei 270 270 cams, with solid lifters.

[DrifterProdigy85]

I run BC Springs (no shimming), Tomei 270 Solid Cams, and Tomei Solid Lifters and rev to 8500rpm without a problem. Ive hit 9300rpm in 1st gear not paying attention a handful of times.