im seeing two different part numbers for Supertech valvesprings for a BVTEC.

H1002D - 70lbs
H1000DR - 85lbs

setup is going to be a B18C in the sub 400whp range, running P72/GSR or CTR cams. and probably wont be reved higher than 8500rpms.

i would assume since im not running high lift cams or high RPMs i would want a lower seat pressure to lessen the wear/stress on the rest of the valvetrain. but im seeing the 85lbs springs listed as "turbo" springs?

 

i would get the 85lbs and run it to 9k why not? I have stock GSR's and i run them to 84

 

no need to rev that high. wont make power there. also i might be running an 89mm crank.

 

i bet you will with those ctr cams and an efficient set up especially with an 89mm

 

I run 85lbs and so do most others but thats on a boosted motor.

 

is it a must to run the 85lb springs on boost? i was inaware of the 2 different spring rates when i oredered mine, how much boost can i run on the 70lb springs? i wont b going over 8500 rpm

 

You'll be fine man, don't worry!

 

sweet man! i been stressin bout it ever since i looked at this thread haha! the supertech sales guy never even asked me what ones i wanted so i never knew till now dammit.. im spendin too damn much to have a 150 dollar set of springs screw me over

 

whats the spring pressure on ITR/CTR springs?