351C cam upgrade
Thread Starter
|
Freshman User
Joined: Jul 2009
Posts: 27
Likes: 0
351C cam upgrade
hey everybody got some decent numbers out of the mustang last weekend 14.1@ 99.8. still working on som carb issues,think i have it a little under cammed. basically its a 351C .030" over, flat tops compression is 10.7:1 with 4v closed chamber heads. torker intake. cam is .530/.530...247*/252* @.050" 108 lsa. pulls 2500-6500. thinkin about going to a .608/.608... 252*/261* @.050" 102 lsa pulls 3000-7500. im runnin a 4 speed manual, with 4.56's. i have the compression and gear to support the bigger cam. open to any input or info... thanks
Freshman User
Joined: Apr 2009
Posts: 42
Likes: 0
From: Toronto Ontario Canada
sounds like an awesome build......just wondering is the cam hydrolic or mech. flat tappet........I had the same set up in my 78 mustang cobra......the cam I used was a comp. 589-615 256-266@50 ( 108 ) mech flat tappet the car ran 11.70's all day long and I drove it on the street everyday to work I had a 5spd in mine and 4:62 gears with spool.....
Thread Starter
|
Freshman User
Joined: Jul 2009
Posts: 27
Likes: 0
mr.mischief...have not done a desktop dyno how would i go about doing that? posi is weak and the clutch is slipping a bit. the cam is 4* advanced if im not mistaken, and i run 10.5* adv at idle and a total adv of 34*. thanks for the help
Junior User
Joined: Sep 2009
Posts: 68
Likes: 0
From: Pasadena, Tx
i downloaded the program from a file sharing network, but you put in the important information, (head flow rates are very helpful, as well as valve opening/closing degrees) & basically 'build' your engine in a computer program.
i wouldn't get too hung up on the horsepower numbers, they're a little exaggerated, but it can help with cam/ignition timing & lets you tweak things like compression ratio or whatever on the fly...
do you have the valvesprings/bottom end to pull off 7500rpm runs?
i wouldn't get too hung up on the horsepower numbers, they're a little exaggerated, but it can help with cam/ignition timing & lets you tweak things like compression ratio or whatever on the fly...
do you have the valvesprings/bottom end to pull off 7500rpm runs?
Lead Driver
Joined: Mar 2004
Posts: 8,922
Likes: 153
Why the 4 speed ? I know they are fun on the street but in a race car they are a waste of time, literally.
Trending Topics
Posting Guru
Joined: Dec 2002
Posts: 2,003
Likes: 2
From: chicago burbs
what's 'streetable' varies from one person to another, spools are for going straight. maybe a locker style center is what you need? there are true Detroit locker carriers and then there are retrofit center kits that you can install into your Trac-Loc carrier. the retrofit kits are said to hold up very well.
as far as the cam swap, there's a lot to look at. you can try a set of 1.8 rockers to see if more lift actually helps at all before biting the bullet. chances are the heads will need to be checked for spring bind, retainer/guide interference, piston clearance and all that good stuff.
i'd work out the known issues like the carb you mentioned before sidestepping them and possibly creating more
as far as the cam swap, there's a lot to look at. you can try a set of 1.8 rockers to see if more lift actually helps at all before biting the bullet. chances are the heads will need to be checked for spring bind, retainer/guide interference, piston clearance and all that good stuff.
i'd work out the known issues like the carb you mentioned before sidestepping them and possibly creating more
FTE Stories
Ford Trucks for Ford Truck Enthusiasts
Rezvani's Latest Post-Apocalytic Monster Is a Ford F-150 Raptor Underneath
Verdad Gallardo
Top 10 Most Expensive Ford Trucks Ever Sold on Bring a Trailer
Joe Kucinski
2027 Ford Super Duty Buyer's Guide (Every Model, Engine, & Package)
Brett Foote
Top 10 Ford Truck Tragedies
Joe Kucinski
AEV FXL Super Duty - the Super Duty Raptor Ford Doesn't Make
Brett Foote
Lobo Vs Lobo: Proof the F-150 Lobo Should Be Even Lower!
Michael S. Palmer
Ford's 2001 Explorer Sportsman Concept Looks For a New Home
Verdad Gallardo
10 Best Ford Truck Engines We Miss the Most!
Joe Kucinski
2026 Shelby F-150 Off-Road: Better Than a Raptor R?
Brett Foote
Lead Driver
Joined: Mar 2004
Posts: 8,922
Likes: 153
You can play around with cams but the fact remains the ex port is crap in them. Back in their day you couldn't find a prostocker without ex port plates. I'd be just as concerened with opening and closing points as lift, dur, ctr line. It would help in selecting a cam if you had your heads flowed. Did you degree in the cam ?
What carb is on it ?
What carb is on it ?
Freshman User
Joined: Apr 2009
Posts: 42
Likes: 0
From: Toronto Ontario Canada
Well boss351 Spools are fun in all but a good posi is the best way to go....I was younger and I didn't care about ride quality back then but in todays tech stuff a spool is very old school for the street....nice conversation piece when you pull into a hangout or show but not as fun to drive today.....my heads were pretty much stock....just a little bowl work stock valves no porting....the heads do flow 300 intake. 170-180 ex. out of the box.. The heads I have now frow 357 intake and 220 ex. with very mild clean up and bowl work.....mainly just unshrouding. run a good distributor......good wires and make sure you're not loosing volts as rpm start getting up there that would cause missfire top end. check valve springs and binding.........installed hight with clev. are mim, 1.850 - 1.900 with just about anything up to 650 lift. match springs to cam and it all should be good.....run about 12-14 in. timing and no more that 36 total.....
Thread Starter
|
Freshman User
Joined: Jul 2009
Posts: 27
Likes: 0
i downloaded the program from a file sharing network, but you put in the important information, (head flow rates are very helpful, as well as valve opening/closing degrees) & basically 'build' your engine in a computer program.
i wouldn't get too hung up on the horsepower numbers, they're a little exaggerated, but it can help with cam/ignition timing & lets you tweak things like compression ratio or whatever on the fly...
do you have the valvesprings/bottom end to pull off 7500rpm runs?
i wouldn't get too hung up on the horsepower numbers, they're a little exaggerated, but it can help with cam/ignition timing & lets you tweak things like compression ratio or whatever on the fly...
do you have the valvesprings/bottom end to pull off 7500rpm runs?
Thread Starter
|
Freshman User
Joined: Jul 2009
Posts: 27
Likes: 0
You can play around with cams but the fact remains the ex port is crap in them. Back in their day you couldn't find a prostocker without ex port plates. I'd be just as concerened with opening and closing points as lift, dur, ctr line. It would help in selecting a cam if you had your heads flowed. Did you degree in the cam ?
What carb is on it ?
What carb is on it ?
Thread Starter
|
Freshman User
Joined: Jul 2009
Posts: 27
Likes: 0
just what came with the car. i drive it every other day or so, so its not just a track car. not really looking for consistency just a quick street car and weekend racer
Thread
Thread Starter
Forum
Replies
Last Post
SteelArmadillo
1980 - 1986 Bullnose F100, F150 & Larger F-Series Trucks
20
Oct 10, 2014 05:34 PM
cjrupp
Small Block V8 (221, 260, 289, 5.0/302, 5.8/351W)
8
Apr 12, 2013 07:05 PM
Rusty_S
Small Block V8 (221, 260, 289, 5.0/302, 5.8/351W)
44
May 18, 2010 10:23 PM
