You will have to seriously de-tune that 383 to make only 300-325 hp.
My 383 project is mild and will make roughly 425hp and 450ft.lbs. of torque
at 4500 rpm, if the TBI came off a 350 cid motor it will run the 383 but
may have some severe driveability issues.
I am building a long-rod stroker that won't see anything over 5500 rpm
using a hydraulic single-pattern roller cam and 1.6:1 roller rockers with
heads, 1 5/8" hedders, Torker intake and 750cfm Edelbrock Performer Carb.
Keep in mind that my engine is mild because i'm utilizing the stock torque
converter and has the potential to make over500hp on pump gas.
I believe you're underestimating the potential of that motor by a wide
do your homework brother, this is my 2nd big money Chevy i've built and i
learned the hard way that it's very easy to build a motor that is
when using a hydraulic flat-tappet cam with 312 degrees of duration and
.528" of lift.
This hydraulic street-roller cam only has 270 degrees of duration but will
.500" of lift using 1.6:1 rockers........easy on the duration, heavy on the
"pedro" < email@example.com> wrote in message
Thanks for the info, but my only question is, will the stock TBI
system supply enough CFM to feed a 383 CI. I am still happy with TBI
system, I will be adding a Edelbrock intake manifold, Edelbrock
aluminum heads, my current JBA Headers. Where I live most of the time
we can only get 87 OCT, the tranny is the 700 E and the rear end is a
10 bolt. Don't need or want 500 HP But thanks for your feed back.
On 12 Jan 2004 18:07:52 -0800, firstname.lastname@example.org (pedro) wrote:
the injectors from the 454 (7.4l) should flow plenty of fuel, if they
are marginal (for your application) you can also use and adjustable
fuel pressure regulator and bump up the pressure..... more pressure more fuel flow.
The injectors can flow all the fuel the throttle body can handle for
it's CFM rating. If you aren't going to get enough fuel, then you aren't
going to get enough air, either. So putting the entire higher CFM unit
from the big block would be the way to go if that's what's needed.
What I would suggest the original poster do is look up the horsepower
and CFM specs for the Edelbrock and Holley aftermarket units. If they
are higher in CFM than the stock units, you may want to consider the
larger TB. Intake manifold may now become an issue in terms of flow, but
I know Edelbrock has an aftermarket manifold for the TBI's.
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