Finally broke in 383 LT4

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Oct 1, 2005 | 04:24 PM

boulderlt4

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Safety Car

Joined: Jun 2004

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From: lafayette co

Finally broke in 383 LT4

Have about 1,500 miles on the new engine. Still not running syn but able to get some dyno runs and a tune.

Here is the dyno sheet...

This is on a Mustang Dyno.

Something is up with the HP as it just tops off at the end. Not sure why.

Things pulls hard as hell now. Fun to drive! Can't wait to get to the track next Wednesday to see how much time I'll gain.

EDIT: built to a 10:1 compression.

Last edited by boulderlt4; Oct 1, 2005 at 07:12 PM.

Oct 1, 2005 | 05:15 PM

FELNGR8

Melting Slicks

Joined: May 2002

Posts: 2,670

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From: Severna Park MD

Quote:

Originally Posted by boulderlt4

Have about 1,500 miles on the new engine. Still not running syn but able to get some dyno runs and a tune.

Here is the dyno sheet...

My HP curve does not flatten out like yours does at 5200-6000. This indicates a limitation on something, what size TB do you have? What cam do you have?

Of course the pieces that do not restrict a 350 could restrict a 396

Oct 1, 2005 | 06:38 PM

redbullapril23

Drifting

Joined: Aug 2004

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From: atlanta Georgia

prob the heads!
it says hes got a 58 mm tb.

also he doesnt have a tune yet!

Last edited by redbullapril23; Oct 1, 2005 at 06:40 PM.

Oct 1, 2005 | 06:46 PM

FD2BLK

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From: Charleston SC

I think you can do alittle work on the upper RPM range but over all it looks great. You have the typical 383/396 wide flat TQ curve and all and all it looks great. Congrats on getting it running again

Oct 1, 2005 | 07:12 PM

boulderlt4

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From: lafayette co

Quote:

Originally Posted by boulderlt4

EDIT: built to a 10:1 compression.

Oct 2, 2005 | 01:12 PM

BRICHC4

Pro

Joined: Jan 2005

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From: Denver Colorado

sweet, that's makes me want to go to dragon that much more. we need to go hit those curves again, of course i'll probably need some more power to keep up

Oct 2, 2005 | 01:37 PM

PLRX

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From: Riverside County Southern California

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Quote:

Originally Posted by FELNGR8

Oct 2, 2005 | 04:01 PM

boulderlt4

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From: lafayette co

Quote:

Originally Posted by BRICHC4

sweet, that's makes me want to go to dragon that much more. we need to go hit those curves again, of course i'll probably need some more power to keep up

Missed you guys today. It was a nice cruise. Only 5 of us.