Hi ratio rockers on a boosted engine

aintgotitmusthaveit Officially Full-On Dubber

295 posts · joined Jun 2006 · 24 Jan 2010, 8:30 am

#759071

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 Now containing 100\% E-Wang

9,368 posts · joined Feb 2006 · 24 Jan 2010, 9:13 am

#759078

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 Seriously Crusin Dubber

135 posts · joined May 2006 · 24 Jan 2010, 12:32 pm

#759107

aintgotitmusthaveit wrote: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 Administrator Always Waiting 4 Friday

16,723 posts · joined Aug 2002 · 24 Jan 2010, 3:36 pm

#759129

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

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greedy53 Bishop of Volkswagenism

3,062 posts · joined Mar 2006 · 24 Jan 2010, 4:57 pm

#759135

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

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jsheppard64 Officially Full-On Dubber

323 posts · joined Mar 2008 · 26 Jan 2010, 2:56 am

#759404

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