L-46 hp upgrade
Melting Slicks
Joined: Apr 2009
Posts: 2,632
Likes: 112
From: Great Plains Iowa
Drifting
Joined: Oct 2005
Posts: 1,615
Likes: 150
From: Forth Worth TX
At a minimum you will need to change the heads (to up the compression and for bigger valves, better flow), change the cam and intake manifold (to compliment the heads) and install headers.
Last edited by Revi; Jun 6, 2015 at 09:12 AM.
Le Mans Master
Joined: Apr 2011
Posts: 6,284
Likes: 1,171
From: Hermosa
To get 420 HP reliably out of a base l-48 you are going to need to bore and stroke it to a 383. Complete overhaul to do this.
Different everything except the block, oil pump, distributor maybe, HEI would be better, and a carb of around 700 CFM or better, probably 750 CFM, if it has the q-jet that would suffice.
Trying to get 420 HP with stock components is only a recipe for a blown up engine.
Different everything except the block, oil pump, distributor maybe, HEI would be better, and a carb of around 700 CFM or better, probably 750 CFM, if it has the q-jet that would suffice.
Trying to get 420 HP with stock components is only a recipe for a blown up engine.
