Easy way to increase HP on stock truck 390 before install - Ford Muscle Forums : Ford Muscle Cars Tech Forum
 
LinkBack Thread Tools
post #1 of 15 (permalink) Old 11-12-2006, 08:02 PM Thread Starter
Registered User
 
Join Date: Nov 2006
Posts: 4
Easy way to increase HP on stock truck 390 before install

I bought a descent garage rebuilt truck 390 but want to add a little hp. The stock 76 motor should have about 200hp. But I'm putting my better 64 heads and 4bbl stock intake w/ stock '64 650cfm carb. This all goes into the 64 Galaxie convertible.

Any idea how much that would increase and how much I could get with a better cam and maybe some 64 style pistons w/ the flat top. Since it is still sitting in the garage I wanted to go ahead and do the easy stuff now like swapping out the stock cam and maybe the pistons if that makes sense. I think the flat top pistons would make the comp ratio about 9.5:1

Any other ideas are appreciated too. Looking to spend just a couple hundered extra which might get me a new cam & pistons.
df0rster is offline  
Sponsored Links
Advertisement
 
post #2 of 15 (permalink) Old 11-12-2006, 10:19 PM
Premium Member
 
Join Date: Sep 2004
Location: Sunny Arid Desolate Port Orchard WA
Posts: 34,827
Easy way to increase HP on stock truck 390 before install

A cam can give you LOTS of HP by changing the dynamics of things etc...

The 4V intake and 64 heads might get you about 20-25 horse in my guessing range.

FE
FEandGoingBroke is offline  
post #3 of 15 (permalink) Old 11-13-2006, 04:15 AM
Registered User
 
Join Date: Nov 2003
Location: Las Vegas
Posts: 2,502
Easy way to increase HP on stock truck 390 before install

Headers or Exuast Manifolds? I say clean up the ports somewhat and if you haev manifolds clean those up a bunch and that should be good
dbu8554 is offline  
 
post #4 of 15 (permalink) Old 11-13-2006, 07:31 AM
Premium Member
 
Join Date: Sep 2004
Location: Sunny Arid Desolate Port Orchard WA
Posts: 34,827
Easy way to increase HP on stock truck 390 before install

Definitely work the ports on the heads and port match the manifolds...
FEandGoingBroke is offline  
post #5 of 15 (permalink) Old 11-13-2006, 07:59 AM
Registered User
 
Join Date: Jan 2004
Posts: 579
Easy way to increase HP on stock truck 390 before install

The stock cam has got to go. 76s were smog engines and the cams were machined retarded to meet emmision standards. Shop around for a good aluminum intake, if you can get the compression up in the 9.5-10 range , the combination of intake, cam, headers and about a 650 CFM carb should put you in the 350-375 HP range with gobs of low end torque.

_________________
Tony P.

<font size=-1>[ This Message was edited by: UTRY on 11/13/06 11:01pm ]</font>
UTRY is offline  
post #6 of 15 (permalink) Old 11-13-2006, 08:19 AM
Registered User
 
Join Date: May 2005
Location: Great Falls, Montana
Posts: 1,506
Easy way to increase HP on stock truck 390 before install

FE Exhaust manifolds are the worst! Atleast the ones I took off my '64 were. Go headers from FPA and an Edelbrock performer RPM manifold and if possible financially add the RPM heads and cam. Put you over 400 hp.


64 Galaxie 500 XL Hardtop (constantly morphing)
FE 431 Stroker, C-6
64 Galaxie 514 XL Convertible (WIP)
514 Stroker, AOD
gbeeler is offline  
post #7 of 15 (permalink) Old 11-13-2006, 08:34 AM
Premium Member
 
Join Date: Sep 2004
Location: Sunny Arid Desolate Port Orchard WA
Posts: 34,827
Easy way to increase HP on stock truck 390 before install

Hedders WILL add some kick to it! OEM were restrictive....
FEandGoingBroke is offline  
post #8 of 15 (permalink) Old 11-13-2006, 06:27 PM
Registered User
 
Join Date: Nov 2003
Location: Las Vegas
Posts: 2,502
Easy way to increase HP on stock truck 390 before install

From the way I understand it seemed like this was maybe a budget build so I was trying to give him cheap idea's maybe I was wrong?
dbu8554 is offline  
post #9 of 15 (permalink) Old 11-13-2006, 10:36 PM
Registered User
 
Join Date: Sep 2006
Location: Eureka, Wisconsin
Posts: 718
Easy way to increase HP on stock truck 390 before install

The biggest bang for your buck will be in ridding that great motor of the TERRIBLE exhaust manifolds and camshaft. Be careful when selecting a replacement camshaft however. Too much camshaft is not a good thing at all. Low end power, driveability, fuel economy can all be lost, if you go too big on the cam. Proper camshaft selection depends on a lot of factors, number one being what you want to use the car for. Gear ratio, exhaust and intake combinations, torque converter stall speed (if your running an automatic transmission) vehicle weight, RPM limitations of the motor, and the size of your wallet all need to be considered when selecting the camshaft. With proper combinations of exhaust and intake components, with a good cam, 350 to 400 horse would be acheivable. The real horseower gains after that are in the cylinder heads. That is where horsepower is really made. The better it can breathe, the more power it will make. You're doing the right thing by asking people how to go about it. Performance parts are not exactly cheap for FE motors, and I always hate to see some having to throw good money after bad.

Dave66Galaxie is offline  
post #10 of 15 (permalink) Old 11-16-2006, 12:42 PM
Subscriber
 
Join Date: Jan 2004
Location: Omaha, NE
Posts: 3,540
Easy way to increase HP on stock truck 390 before install

Listen to the exhaust comments.

My experience
1 - Headers and an efficient exhaust
2 - Recurved distributor
3 - 4 barrel and a good dual plane intake
4 - Cam and headwork

_________________
70 Sportsroof, 427 FE/489 cid, 10.4:1,Stage 2 Edelbrock heads, RPM intake, 1000 Holley HP, TKO-600, 3.70's, A/C
71 F100 4x4 shortbed 390 hot rod
02 F250 Powerstroke 4x4, chipped, exhaust, trailer puller
07 HD Street Glide, 96 inch 6 speed, vivid black

<font size=-1>[ This Message was edited by: My427stang on 11/17/06 3:51am ]</font>
My427stang is offline  
post #11 of 15 (permalink) Old 06-10-2017, 12:50 PM
Not Confirmed
 
Join Date: Jun 2017
Posts: 1
Re: Easy way to increase HP on stock truck 390 before install

i have a 66 galaxie w/ 390 and 4 seed..... what would you say a good cam would be?
80fordmaniac is offline  
post #12 of 15 (permalink) Old 06-11-2017, 04:48 PM
Subscriber
 
Join Date: Jun 2006
Location: Houston
Posts: 5,221
Re: Easy way to increase HP on stock truck 390 before install

Realize there is no cam best for everything. If there was, there would be only one choice.
If you want torque and speed in town, 0-60 mph get a street cam (and maybe a 3.25 rear end). If you want horsepower at high end speed like 100+ mpg at the end of a quarter mile race, get a high performance cam, and the headers and intake and carburation and stall tranny that goes with all that.
Personally I think the former approach is more daily fun and is also cheaper while the latter, no matter what you invest, your wife's 2009 Infiniti will leave you and your hi-performance Galaxie in her rear view mirror. But everyone has a different goal with their Gals.

To every man upon this earth
Death cometh soon or late.

Putts drives a 1965 Galaxie. Rebuilt 390, 4100 on a Performer, MX, AC, PS, PB w Scarebird front discs on Cragar 17" S/S.
puttster is offline  
post #13 of 15 (permalink) Old 06-14-2017, 01:51 PM
Registered User
 
Join Date: Aug 2015
Location: Anaheim CA
Posts: 204
Re: Easy way to increase HP on stock truck 390 before install

The stock 390GT cam is cheap and effective. The 390GT was rated at 320 HP back then with parts like you are using. MAKE SURE you use headers like others have suggested. They are the biggest increase you can do for the least amount of $$$s.

Experimental Ford parts collector.
GT350HR is offline  
post #14 of 15 (permalink) Old 06-15-2017, 05:36 AM
Subscriber
 
Join Date: Jun 2006
Location: Houston
Posts: 5,221
Re: Easy way to increase HP on stock truck 390 before install

If you only want to spend a couple hundred you are not going for 6000 rpm so I would skip the headers. Ford thought enough about its manifolds they put them on thr 428, and that was in the middle of the muscle car duels with Chevy, so I would think they would do fine with any street cam you put in a 390. Seems to me rpm should be the determining factor. Flattop Pistons seem like a good idea especially if you don't have any yet. I've only built one engine though, so my suggestion is based in what I've read, not experience.

To every man upon this earth
Death cometh soon or late.

Putts drives a 1965 Galaxie. Rebuilt 390, 4100 on a Performer, MX, AC, PS, PB w Scarebird front discs on Cragar 17" S/S.
puttster is offline  
post #15 of 15 (permalink) Old 06-15-2017, 11:24 AM
Registered User
 
Join Date: Aug 2015
Location: Anaheim CA
Posts: 204
Re: Easy way to increase HP on stock truck 390 before install

Ford exhaust manifolds are notorious for "eating up" horsepower. Headers are a BIG improvement on a Ford regardless of which factory manifold was used. The best was arguably the '63-65 427 Galaxie. Steel tube , long headers put them to shame as well.

Experimental Ford parts collector.
GT350HR is offline  
Sponsored Links
Advertisement
 
Reply

Quick Reply
Message:
Options

Register Now



In order to be able to post messages on the Ford Muscle Forums : Ford Muscle Cars Tech Forum forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.

User Name:
Password
Please enter a password for your user account. Note that passwords are case-sensitive.

Password:


Confirm Password:
Email Address
Please enter a valid email address for yourself.

Email Address:
OR

Log-in









Human Verification

In order to verify that you are a human and not a spam bot, please enter the answer into the following box below based on the instructions contained in the graphic.




Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page



Posting Rules  
You may post new threads
You may post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On

 
For the best viewing experience please update your browser to Google Chrome