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Hi ratio rockers on a boosted engine
aintgotitmusthaveit - January 24th, 2010 at 08:30 AM

Ok guys, after a stint working os, and other distractions I'm back to finish the super charger install on the replica.
I have a 1916 with a 110cam (appRently), going to replace the rocker shafts with solid ones, question is though should I fit rockers with more lift on a boosted engine?

Joel - January 24th, 2010 at 09:13 AM

hey Nick, glad to here your back at it

just be aware W series cams can only run 1.25s at the most so no 1.4s
but seeing as its a force fed engine anyway ratio rockers probably wont give as much bang fo buck as they would on an N/A motor

funbug - January 24th, 2010 at 12:32 PM

Quote:
Originally posted by aintgotitmusthaveit
Ok guys, after a stint working os, and other distractions I'm back to finish the super charger install on the replica.
I have a 1916 with a 110cam (appRently), going to replace the rocker shafts with solid ones, question is though should I fit rockers with more lift on a boosted engine?

I ran 1.25 ratio rockers on my blow thru 2110. It ran well from low revs to about 6000rpm, although the stroker crank would have helped with torque at low revs. Make sure you have sufficient deck height to avoid valve contact with the pistons.

vw54 - January 24th, 2010 at 03:36 PM

it will keep the valve open longer so more fuel in is good use the 1.4s

greedy53 - January 24th, 2010 at 04:57 PM

you may find that getting air to a motor that big will be a problem fuel is easy i have noted that with the smaller blower a 12 is a bit small but the 14 should do a better job
have a look at the amount of air that can be shoved through a pair of webbers or caddies big holes
just a thought

jsheppard64 - January 26th, 2010 at 02:56 AM

just a question on my personal interest...
how much lift (@valve) can a standard head sustain?
cheers