© Copyright 1995 thru 2008 - The Mustang Works™. All Rights Reserved.
MustangWorks.com is designed and hosted by Aero3 Media.
MustangWorks.com is designed and hosted by Aero3 Media.
|
01-03-2003, 03:35 AM | #1 |
Mustangs
Join Date: Jul 2000
Posts: 1,938
|
pushrod length question/adjusting valve train preload
I just recieved my B303 cam and i'm going to be putting it on my 302 with my 1.7:1 Cobra roller rockers and GT40 heads.
I was wondering, will i have to change pushrod length or put shims underneath the pedestal mount rocker arms. I read in a ford manual that you use shims after milling the heads (or get shorter pushrods) and i've heard people put different length pushrods with different cams, but i'm not sure what i need to do in my case. I'll have a total of .510" lift and i'm using new Ford hydraulic roller lifters. I appreciate any input, thanks, Rick
__________________
2005 Suzuki Hayabusa GSX1300-R 1980 Ford Thunderbird - 255 V8 ported heads, 5.0L ported stock headers, O.R. H-pipe and Flowmaster 2-chambers, dual roller timing chain hi-po Mack Truck hood emblem 1985 Mustang GT 5.0L T5, F-303, GT40p, headers, off-road h, flowmasters, MSD stuff, etc. Sold 02/06/04 1989 Mustang GT ET: 13.304@102.29 mph (5-24-03) Sold - 1998 Mustang Cobra coupe, 1/4 mile - street tires: 13.843@103.41 (bone stock) |
01-03-2003, 05:07 AM | #2 |
Junior Member
Join Date: Mar 1999
Location: Ventura, California
Posts: 8,981
|
You just need the standard 7.6" pushrods. The rockers should have come with shims, just in case you need them.
__________________
Webmaster: Rice Haters Club Jim Porter Racing Peckerwoods Pit Stop Support Your Local
RED & WHITE! |
01-03-2003, 12:29 PM | #3 |
Registered Member
Join Date: Mar 1999
Location: Amarillo, Texas, USA
Posts: 780
|
FYI. . . I installed an F303 last year with Ford Racing's roller rockers and didn't have to use any of the shims and havent' had any problems with it yet.
__________________
1986 four-eyed LX coupe, 358 Cleveland, Tremec TKO600/centerforce clutch, dish cut Probe forged pistons, comp cams hyd.roller cam, .579/.588@224/230, Edel.performer, 670 holley street avenger, CPR custom built long tubes, ported and polished 4bbl heads, manley valves, beehive springs, MSD peo-billet dist/MSD6AL, fluidamper, 5 lug conv. with 17x8 bullits there's more but it's still not finished yet. Oh, and the oldest boy is turning his 89 GT into a FFR cobra this next summer. |
01-03-2003, 12:35 PM | #4 |
Being stroked is great
Join Date: Oct 1998
Location: Alberta, Canada
Posts: 772
|
You may have to use shims based on the travel of the rocker arm across the valve stem. If the B303 has a smaller base circle than the stock cam, you may have to use a different length pushrod also. The best way to find out is to assemble it (correctly), and then turn the engine over by hand and watch the path of the rocker across the valve. You want as little movement as possible across the valve. It sounds tedious but if you do it right the first time, you won't have problems.
|
01-03-2003, 03:59 PM | #5 |
Mustangs
Join Date: Jul 2000
Posts: 1,938
|
awesome, thanks guys! I have no problem spending extra time making sure it's correct, i'd rather do it right the first time than to screw around and break stuff.
__________________
2005 Suzuki Hayabusa GSX1300-R 1980 Ford Thunderbird - 255 V8 ported heads, 5.0L ported stock headers, O.R. H-pipe and Flowmaster 2-chambers, dual roller timing chain hi-po Mack Truck hood emblem 1985 Mustang GT 5.0L T5, F-303, GT40p, headers, off-road h, flowmasters, MSD stuff, etc. Sold 02/06/04 1989 Mustang GT ET: 13.304@102.29 mph (5-24-03) Sold - 1998 Mustang Cobra coupe, 1/4 mile - street tires: 13.843@103.41 (bone stock) |
|
|
Similar Threads | ||||
Thread | Thread Starter | Forum | Replies | Last Post |
Pushrod Length help | BLACK85GT | Windsor Power | 3 | 02-04-2004 10:27 AM |
pushrod length? which one?? | DemonGT | Windsor Power | 0 | 07-06-2003 03:51 AM |
AFR 165 pushrod length question. | JaxMustang50 | Windsor Power | 2 | 04-13-2003 11:39 PM |
Valve train 'a knocken,oil pressure blues | robertwigton | Windsor Power | 4 | 12-04-2001 06:27 PM |
Stock Pushrod Length | StreetRacin89Stang | Windsor Power | 4 | 04-17-2001 04:12 PM |