marshall12395

im building an all motor b20 vtec right now i have skunk 2 tuner series stage 2 with alpha springs and retainers and ferra valves my friend has a set of skunk 2 pro series stage 2 with Rocket Motorsports SL duel valve springs i never heard of these springs and could find anything on them im wondering if anybody has any info on these springs also wondering if this would be a good upgrade from the tuner series he also wants to sell me skunk2 lma
parts list
b20b block
eagle rods
arp rod bolts
cp 12.9.1 pistons
head 1997 type r
skunk 2 stage 2 cams
skunk 2 valve springs
ferra valves
skunk 2 intake
skunk 2 74mm tb port matched
aem fuel rail
aem fpr
walbro fuel pump
grams 750cc injectors
skunk 2 headers
custom 2.5 exhaust
bwr ls vtec conversion
power driven catch can

93egSLEEPER

The rocket SL are 85lb seat pressure if I'm not mistaken. Same as the standard Supertechs, I'm not sure about the tuner specs.

wunfstgsr

pro 2 is big! id deff stick with the tuner 2 cams.

93egSLEEPER

Pro 2 would work well with his setup though. Kill the tuner everywhere actually.

marshall12395

thanks for the input might i also have set wiseco piston 10.6.1 might put these back in the block

93egSLEEPER

Don't go less compression unless you think you want to boost it. Compression is how you make power NA

GIZZ - EXV

I wouldn't buy a used set of springs. But if they are there for the taking and you have access to some equipment I'd check them all for pressure and coil bind then compare to what you are running now.

devious_yeti

If you keep the ferrea valves, make sure to use their keepers. The location they machine the groove for the keepers is different than stock, so using oem keepers will change your springs installed height, possibly causing retainer-valve seal contact. At least in my past experience with the 5000 series valves with sk2 tuner 2s