Ran this up yesterday, came out pretty damn good.
The brief was as much HP as possible while remaining streetable & not requiring excessive maintenance.
We made 654hp @ 7100rpm & 532lb at 5400rpm on pump E85.
670.5hp @ 7200rpm & 538lb @ 5300rpm on VP C85.
Motor has OEM block & iron heads.
Block converted to 4 bolt, grouted, oiling mods & good machining.
Scat steel small journal crank
Callie's compstar 5.85" small journal rods
SRP pro pistons
Heavily ported but not max effort 'VT' iron heads with 2.06/1.6" Ferrera comp plus valves.
Valve train is custom grind comp solid roller, 268/274 on 109 centres, .438/.420" endurance racing lobes (the old crane lobes). .700/.670" valve lift with Yella Terra plantinum 1.65 ratio rockers.
BAM bushed lifters
Crow .110" wall 5/16" pushrods
Isky RAD-9000 springs, Manley TS retainers & Ti locks, Manley spring seats.
Rollmaster gold timing kit.
Modified RTS oil pan with external pickup
Moroso single stage oil pump/vac pump combo on a custom mount, moroso BBC drive mandrel on custom adaptor, moroso remote filter, moroso vac relief valve.
All plumbing is Aussie made speed flow fittings & line
TP pro paw intake, match ported & runner entries raised & tidied, custom tapered 2" spacer, pro systems 950 E85 carb.
MSD pro billet distributor, 6AL ignition & blaster coil, MSD 8.5mm leads.
Off the shelf hurricane headers, 1 7/8" primary tri Y with 2" secondarys & 3" collectors.
Compression is a conservative 12.4:1 to allow for variable pump E85 quality & we tuned it on the safe side.
It'll race on C85.
It's the highest power I've seen from a streetable iron head engine that's not set on kill.
Another 383 Holden street/strip engine
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KnightEngines
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Another 383 Holden street/strip engine
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KnightEngines
- Guru
- Posts: 2690
- Joined: Fri Jan 09, 2009 8:51 pm
- Location: Australia