cam and timing chain on a 87 460 - Pirate4x4.Com : 4x4 and Off-Road Forum
 
Pirate4x4.Com : 4x4 and Off-Road Forum  

Go Back   Pirate4x4.Com : 4x4 and Off-Road Forum > Brand Specific Tech > Ford
Notices

Reply
 
Share Thread Tools Display Modes
Old 02-08-2011, 05:17 PM   #1 (permalink)
Registered User
 
Join Date: Jan 2008
Member # 107491
Location: lacrescenta ca
Posts: 150
cam and timing chain on a 87 460

sooooo. im going to change the chain to a early TDC chain and figured it wouldn't be that much more work to change the cam as well. I talked to a machine shop and they recommend...


ISKY 311256/262
Best overall cam for towing. Trucks, Vans, R.V., etc. Broad torque
band. Good vacuum. 3.55-4:10 axle ratio. 9.5:1 compr. Computer
compatible. Smooth idle.



or

#249-34-231-4
COMP Cams Xtreme 4x4 Hydraulic Flat Camshaft
Lift .514"/.514"
Duration 256/262
RPM Range 1000-5000

along with a performer intake and a 750 carb, cloyes 220-9-1122 timing chain.


Has anyone run a similar combo before? Will their be enough torque to pull another full size truck? Or will i be disappointed.

Last edited by dezertsub; 02-09-2011 at 08:39 AM.
dezertsub is offline   Reply With Quote
Old 02-08-2011, 06:51 PM   #2 (permalink)
Rock God
 
82F100SWB's Avatar
 
Join Date: Nov 2002
Member # 15263
Location: Dryden, Canada
Posts: 2,150
Send a message via ICQ to 82F100SWB Send a message via AIM to 82F100SWB Send a message via MSN to 82F100SWB Send a message via Yahoo to 82F100SWB
I have that Xtreme 4x4 grind in my wheeling pig, with a performer RPM topped with a performer 750, headers, straight up timing set, and about 9.5:1 compression.
It is extremely snappy and there are mountains of low end torque, enough that I can actually drive the horribly mismatched combo of 4.10 gears and 4.10's in high range without hating life, 80% of peak torque is in play by 2000 rpm, and the peak at 4000 is around the 500 mark, hp is nothing to write home about, around 325 but, thats where not porting the heads bites me in the ass, engine anylizer and a well known porter point to about a 75 hp loss there.
With my old 38.5's it was quite impressive.
In a reasonably stock truck with 33's or smaller, it would be fun, and theres no shortage of torque.
__________________
96 F350 XL CC PSD/5 speed 4x4... Family hauler in the making
92 W250 LE, CTD/5 speed 4x4, tow pig/DD/snow pushin pig
86 F250... 460/T19/1345/D60/welded 10.25, 44 Boggers, reg cab, some junk... Build

Last edited by 82F100SWB; 02-08-2011 at 06:52 PM.
82F100SWB is offline   Reply With Quote
Sponsored Links
Old 02-08-2011, 07:01 PM   #3 (permalink)
Registered User
 
Join Date: Jan 2008
Member # 107491
Location: lacrescenta ca
Posts: 150
Quote:
Originally Posted by 82F100SWB View Post
I have that Xtreme 4x4 grind in my wheeling pig, with a performer RPM topped with a performer 750, headers, straight up timing set, and about 9.5:1 compression.
It is extremely snappy and there are mountains of low end torque, enough that I can actually drive the horribly mismatched combo of 4.10 gears and 4.10's in high range without hating life, 80% of peak torque is in play by 2000 rpm, and the peak at 4000 is around the 500 mark, hp is nothing to write home about, around 325 but, thats where not porting the heads bites me in the ass, engine anylizer and a well known porter point to about a 75 hp loss there.
With my old 38.5's it was quite impressive.
In a reasonably stock truck with 33's or smaller, it would be fun, and theres no shortage of torque.
thanks for the reply mine has 4.10 gears with a 4 spd on 37" good years, it does ok as far as rpm/mph on the highway. Now will the stock valve springs handle the lift of .514??? or should i be changing the springs also?
dezertsub is offline   Reply With Quote
Old 02-08-2011, 08:41 PM   #4 (permalink)
55 in a 75
 
Dr.Danger's Avatar
 
Join Date: Sep 2010
Member # 168243
Location: College Station, TX
Posts: 1,934
I have heard stock valve springs will handle that but it's cheap insurance to go ahead and change them out now.

Also, stock new springs are one thing, stock used springs are another. Food for thought.
__________________
-Dave
Dr.Danger is offline   Reply With Quote
Old 02-09-2011, 11:16 PM   #5 (permalink)
Registered User
 
Join Date: Aug 2007
Member # 97378
Posts: 49
What has been done to the internals of the motor?


Dont go BIG carb, the motor can only pull so much and going to a bigger cfm carb will just cost you at the pump. Put a stock 429 gear an chain set into it set the timing at 32-36 tt and top it with a 650 OLD style Holley.

Last edited by tboy111; 02-09-2011 at 11:29 PM.
tboy111 is offline   Reply With Quote
Old 02-09-2011, 11:32 PM   #6 (permalink)
Registered User
 
Join Date: Aug 2007
Member # 97378
Posts: 49
Before I forget, WATCH out for Mallory distributors, I had one in my boat and the F-ing thing came apart and forced the replacement of a new motor.
tboy111 is offline   Reply With Quote
Old 02-10-2011, 12:24 AM   #7 (permalink)
Registered User
 
Join Date: Mar 2008
Member # 111010
Posts: 125
Will the straight up timing set cause problems with smog testing? Currently looking into almost the same combo.
8d3toy is offline   Reply With Quote
Old 02-10-2011, 02:14 AM   #8 (permalink)
Registered User
 
Join Date: Feb 2011
Member # 182215
Posts: 16
I do believe all the EFI 460's had straight up 0 degree chain and gears
460power is offline   Reply With Quote
Old 02-10-2011, 01:20 PM   #9 (permalink)
Registered User
 
Join Date: Mar 2008
Member # 111010
Posts: 125
They do, forgot to mention I am building an 86 F350 and am worried about putting a straight up timing set and possibly failing smog, where I think on EFI the timing is not checked by the smog tech.
8d3toy is offline   Reply With Quote
Old 02-11-2011, 12:13 AM   #10 (permalink)
Rock God
 
82F100SWB's Avatar
 
Join Date: Nov 2002
Member # 15263
Location: Dryden, Canada
Posts: 2,150
Send a message via ICQ to 82F100SWB Send a message via AIM to 82F100SWB Send a message via MSN to 82F100SWB Send a message via Yahoo to 82F100SWB
Changing the cam timing doesn't change your ignition timing, both are timed to the crank, so, while you have moved the position of the cam, 10 degrees of ignition timing is still the same in relation to the position of the crankshaft. I can't vouch for how it may or may not effect the actual exhaust emissions though.

As for .514 lift with stock springs, that is what I am running, but, my springs are low mile. If your springs are of unknown age and/or factory, I'd change them for piece of mind alone.
__________________
96 F350 XL CC PSD/5 speed 4x4... Family hauler in the making
92 W250 LE, CTD/5 speed 4x4, tow pig/DD/snow pushin pig
86 F250... 460/T19/1345/D60/welded 10.25, 44 Boggers, reg cab, some junk... Build

Last edited by 82F100SWB; 02-11-2011 at 12:15 AM.
82F100SWB is offline   Reply With Quote
Old 02-11-2011, 03:58 PM   #11 (permalink)
Registered User
 
Join Date: Jan 2008
Member # 107491
Location: lacrescenta ca
Posts: 150
thanks alot guys and i am going to change the springs cc p# 249-926-16 $84
dezertsub is offline   Reply With Quote
Old 02-17-2011, 12:03 PM   #12 (permalink)
Registered User
 
Join Date: Jan 2008
Member # 107491
Location: lacrescenta ca
Posts: 150
so i get the cam and chain set yesterday and i decide to try to get the exhaust manifold gasket changed because it had a good leak. After the heat shield came off i noticed one of the bolts were MIA. So i get the penetrating oil and try to get the rest of them off. Now i have 6 out of 8 broken in the head.
I pulled the head and took it to a machine shop this morning. Should be done by the end of the day. Still missing the chain cover gaskets and valve springs, they are on there way.
dezertsub is offline   Reply With Quote
Old 02-17-2011, 08:48 PM   #13 (permalink)
Registered User
 
just4cuz's Avatar
 
Join Date: Aug 2007
Member # 98655
Location: Alta Loma, Ca.
Posts: 2,046
The cam timing retard was about 4 degrees on the cam as I recall, thats 8 crank degrees. With a newer smog profiled cam and set to straight up, the way the newer cams are designed to run, it should not cause any emissions problems. If you stayed with a stock cam and your timing called for 4 degrees BTDC and you set it at 4 degrees BTDC it would run like it was at 12 degrees BTDC.
just4cuz is offline   Reply With Quote
Old 02-18-2011, 12:27 PM   #14 (permalink)
Registered User
 
Join Date: Jan 2008
Member # 107491
Location: lacrescenta ca
Posts: 150
just got the head back and he charged me $30 a time-cert.
dezertsub is offline   Reply With Quote
Old 06-28-2011, 06:45 PM   #15 (permalink)
Registered User
 
just4cuz's Avatar
 
Join Date: Aug 2007
Member # 98655
Location: Alta Loma, Ca.
Posts: 2,046
So what happened with this thing? You still out flogging the Chevy?
just4cuz is offline   Reply With Quote
Reply

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



All times are GMT -7. The time now is 06:59 PM.


Powered by vBulletin® Version 3.8.6
Copyright ©2000 - 2014, Jelsoft Enterprises Ltd.
Search Engine Optimization by vBSEO 3.6.0 ©2011, Crawlability, Inc.