I need a little help here deciding on what to do. I'm concerned that my spring pressure will not be enough and was wondering what the best option is to do. I have the following combo going into a 20ft circle race boat that will be used as a lake rocket. I'd like to keep my RPMs to 6500.
Merlin II block 4.6" bore.
Crower 4.25" crank.
Lunati 6.8" Pro-billet rods.
JE pistons.
CR = 8.68:1.
Pro-topline 360CC heads.
Pistons, chambers and exhaust ports coated.
1071 BDS Blower
Whipple Intercooler
2 x 1150 dominators (gas)
Cam is a custom roller 283/292 @ 0.050, 0.799/0.765 on 114 centres
1.7 Roller lifters
Isky toolroom springs 9955
With the springs and the cam I will have around 285-295lbs seat pressure and around 700lbs open.
Also, there is only 0.060 clearance before coilbind.
There is a Comp Cams spring that will give me 305 / 830 lbs and over 0.100 before binding.
Should I:
a) See how the current springs go.
b) Get the new springs
c) Get a smaller lift cam
Thanks
Paul