460 Compression ratio and power - Ford Forums - Mustang Forum, Ford Trucks, Ford Focus and Ford Cars
Ford Forum Ford Forum

» Auto Insurance
» Featured Product
ยป Wheel & Tire Center

Go Back   Ford Forums - Mustang Forum, Ford Trucks, Ford Focus and Ford Cars > The Garage - Tech Forums > Engine Specific Tech > 429-460 Tech
Register Home Forum Active Topics Photo Gallery Auto Loans Garage Mark Forums Read Auto Escrow

FordForums.com is the premier Ford Forum on the internet. Registered Users do not see the above ads.
Reply
 
LinkBack Thread Tools Display Modes
Old 05-18-2007, 09:59   #1 (permalink)
Registered User
 
Join Date: May 2007
Posts: 5
460 Compression ratio and power

Hello

Couple questions for the people that have built a few 460's. I have built a 547 ci storker for my 69 mustang fastback and would like to know what kind of hp I can expect to get. I started with a 1986 truck engine bored it .40 over with kb 402 pistons, these show to give 9.4 cr with 97cc heads! I used the stock heads off the 86 with stock valve size. I cleaned up all the ports and removed the smog bumps from exhaust port. I milled all the towers and installed screw in studs and added roller tipped rockers! I do all my own head work so no money wasted, just time! I plan to add better heads later that is why I used the stock heads. I have aftermarket 6.7" I beam rods with 4.5" stroke. Engine was balanced. I am going to use a Edelbrok performer intake toped with a 850cfm demon carb. Cam is by Comp Cams 34-341-4 Magnum solid with these specs

Camshaft Specification Table
Part Number 34-341-4
Engine 1968-1994 Ford
429ci-460ci
8cyl.
Grind Number FF 282S-10
Description

--------------------------------------------------------------------------------

Intake Exhaust
Valve Adjustment 0.022 0.022
Gross Valve Lift 0.57 0.57
Duration At 0.015 Tappet Lift 282 282

--------------------------------------------------------------------------------

Valve Timing At 0.015
Open Close
Intake 35 67
Exhaust 75 27

--------------------------------------------------------------------------------

These Specs Are For The Cam Installed At 106 Intake CL
Intake Exhaust
Duration At 0.05 236 236
Lobe Lift 0.33 0.33
Lobe Separation 110

I know the heads are the cork in the engine right now, how much HP and torque do you think and how much do you think I am giving up with these heads? Is the 9.4 cr about right on these engines for pump gas on a street car?

Thanks
bsoutlaw32 is offline   Reply With Quote
Sponsored Links
Advertisement
 
Old 05-22-2007, 00:32   #2 (permalink)
429/460 Fanatic
 
Paul Kane's Avatar
 
Join Date: Sep 2004
Location: San Francisco Bay Area
Posts: 548
cool Re: 460 Compression ratio and power

These big engines need a lot of air to breathe, and increased compression ratio helps this part of the equation a lot.

I'm going to take a wild guess and estimate 500HPas-is, but I think that your motor has more potential with a bigger cam, bigger carb, and well ported iron heads...all of which could add 80HP or more.

Paul
__________________

We're on the web; click below:
High Flow Dynamics
Performance Components for the 429/460 Engine Family
Paul Kane is offline   Reply With Quote
Sponsored Links
Advertisement
 
Reply

  Ford Forums - Mustang Forum, Ford Trucks, Ford Focus and Ford Cars > The Garage - Tech Forums > Engine Specific Tech > 429-460 Tech



Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not 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


Powered by vBadvanced CMPS v3.2.2

All times are GMT -7. The time now is 21:23.



Powered by vBulletin® Copyright ©2000 - 2014, Jelsoft Enterprises Ltd.
Content Relevant URLs by vBSEO 3.6.0
Garage Plus vBulletin Plugins by Drive Thru Online, Inc.