happy 400

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Mar 12, 2005 | 10:17 AM

entwizard

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Joined: Aug 2004

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happy 400

i rebuilt my 81 f350 4x4 400
all surfaces decked
.040 over stock compression pistons
double roller timing - straight-up
crane energizer 288 dual pattern cam
exhaust porting
much better valve springs!
edelbrock streetmaster 400 intake
carter afb 650
recurved dist.
dual 2 1/2" into one magnaflow 3" out

4 speed (wish i had a 5 speed with o/d. future swap)
4.10 grars. swapped in a sterling rear . still has the dana 50 ifs
\
runs great on mid octane fuel

help with horsepower/torque estimates appreciated

cant believe my fuel mileage... driving 60-65 hwy 16mpg
still sucks around town though! (heavy foot) 8-10 mpg

Mar 16, 2005 | 04:51 PM

bigredtruck

More Turbo

Joined: Dec 1999

Posts: 582

Likes: 5

From: New Orleans United States

How does it sound with a single 3" exhaust? I was considerign this for my truck also.

Mar 17, 2005 | 07:41 AM

entwizard

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Joined: Aug 2004

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sounds just like full duals. the 3" after the magnaflow deepend the sound. plus it acts as the crossover. the 2 1/2 dual part goes to where the stock muffler goes. then the single 3 from there. luckily my truck is non-cat!

Mar 17, 2005 | 02:58 PM

F150daniel

Posting Guru

Joined: Mar 2003

Posts: 1,253

Likes: 2

From: spartanburg, SC

exactly
353.605 hp @ 5245 rpm
423.244 tq @ 2623 rpm

300-350 Hp
375-450 tq

Mar 17, 2005 | 07:23 PM

entwizard

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thank you for the numbers! much appreciated.

Mar 18, 2005 | 05:58 PM

MBDiagMan

Cargo Master

Joined: Dec 2004

Posts: 2,232

Likes: 3

From: NE Texas

That's alot of cam. Does it idle okay and does it have any low end torque?

Have a great day,
Doc

Mar 19, 2005 | 08:15 AM

entwizard

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Joined: Aug 2004

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it idles fine. has a lope to it but not too much. torqes there. i sacrificed some though deliberetly. i only have 33" tires ands with 4:10 gears and the stick it is reving often. i relied on cubic inches for the torque. i like the powerband where it is. at 3000 there's alot!