Ok..........that's what I was thinking, just needed to confirm my suspicions
on that.
basically what we have planned is a 3.9 with a true 9.5:1 compression ratio,
measured and corrected deck height, (piston set .020 below deck thru decking
the block) and milling of the heads to the required chamber cc to achieve it
with a .038-.042
Fel-Pro head gasket, a reworked stock crank
that's machined for a better set of rods, rebalanced,
and set up with a lighter rotating mass,(Eagle,Erson, Manley, etc connecting
rod, and a set of KB sil-vo-lite, or Diamond racing pistons) , studded
mains, moly piston rings, cylinder head studs, ported and polished
heads.............generally a 3.9 built to live a long and healthy life of
street and strip performance.
and one of Speedtweak's 3310 Comp Cams bump sticks and the required valve
spring set's.
I figure it should have a nice 225-250 hp and around 275-300 lb/ft
torque..........and rev very nice and smooth!!.........This 3.9 will go down
in Gary Hedlin's
'98 Dakota Sport 2wd.........should make a nice daily driver and weekend
warrior at the strip once in a while.
Ron- '01 Dakota Sport 3.9 Supercharged
website: www.scsilverdak.com
e-mail: scsilverdak@hotmail.com
----- Original Message -----
From: "Bernd D. Ratsch" <bernd@texas.net>
To: <dakota-truck@dakota-truck.net>
Sent: Friday, September 20, 2002 11:31 PM
Subject: DML: RE: Magnum Engine Mods
>
> If you're changing the cam over to something with more overlap ("Lumpy"
> sounding cam)...9.5:1 is fine and won't mess with the PCM. 10:1 is a
> bit high and will also (definitely) require Super Unleaded (maybe some
> custom programming as well). Of the three 408's we've helped out with
> (or built)...9.5:1 is perfect.
>
> - Bernd
>
> -----Original Message-----
> From: owner-dakota-truck@bent.twistedbits.net
> [mailto:owner-dakota-truck@bent.twistedbits.net] On Behalf Of
> scsilverdak
> Sent: Friday, September 20, 2002 7:22 PM
> To: dakota-truck@dakota-truck.net
> Subject: DML: Magnum Engine Mods
>
>
>
> Has anyone done a engine build and increased the compression ratio to
> say 9.5 or 10.0 to 1 on a natually-aspirated performance build up in a
> late model computer-controlled EFI vehicle? I'm betting the PCM will not
> care one way or the other, as long as the engine stays out of
> detonation. Are the 408 STROKER style engines left at the standard
> 8.5-9.0 ratio or are they increased?
>
> Ron- '01 Dakota Sport 3.9 Supercharged
> website: www.scsilverdak.com
> e-mail: scsilverdak@hotmail.com
>
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