Andrew,
To make 200hp reliably, you will need the comp up around 11:1. To run 11:1
reliably you will need forgies. All the heads I have seen making around
200hp on L series are using approx 40mm inlet ports with 44mm inlet valves.
Exhaust ports are taken out to the max with the humps completely removed
and a smooth radius on the upper port surface. Use 36mm exhaust valves. The
valves are usually one piece 214N S/Steel, stellite tipped, tuliped & swirl
polished.
Port profiles on the inlet side are the key to making the power. Not only
do you open the port sizes but shape the floor of the port into a D laid on
its flat. This gives the largest flow for the port size.
The next step would be to fit an injection system eg Wolf Motec etc. You
wont make much if any more at the top end, but it will make it smoother and
more grunty out of corners.
My two bobs worth anyway.
Cheers
Feral Errol
----------
From: Andrew Kubenk <[EMAIL PROTECTED]>
To: [EMAIL PROTECTED]
Subject: 200hp L20 on tha cheap
Date: Monday, August 07, 2000 10:51
ive got a mate with a fairly tough L20 in a stanza and we were discussing
freshening
up the old donk.
so
i need a few suggestions on making about 200 flywheel hp fairly reliably.
we are starting with, 2x45 webers, datrally manifold, fairly ported head,
larger
valves, flat tops.
please advise as to how far the head (port, polish, valve size) and
block(pistons?
balancing etc) needs to go as well as possible upgrades to induction
without
too many electronic gizmos.
please advise and thanking in advance.
andrew
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