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347 Stroker |
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Regul8r 
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 Topic: 347 StrokerPosted: 15-February-2010 at 3:49AM |
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First let me start with this...
I am not looking to make a monster HP drag strip killer.
I am looking to have a decent dependable driver that has some cool/wow factors to it when it is done.
I am now the owner of a 347 SCAT Stroker Kit with .030 over Keith Black pistons to go in my 72 302 block. Also going on the motor is an Offenhauser Dual Quad intake with twin 450cfm Carbs. Also have a timing GEAR SET that came with it all(not sure about that, but the cool/wow factor goes up with the noise and being able to say you have it) Already running the stock 1988 Mustang GT headers on the motor and will stay with them.
I need some info and advice. Again NOT looking for some 500hp beast!
What is the CC and valve sizes on the stock '72 302 heads?
Will the stock heads work decent with the stroker kit?
What cam should I use for an all around driver hot rod, IF it has a good hot rod idle and lope to it... WAY COOL!
Do I use the stock push rods?
Stock heads and springs... what ratio roller rockers or even exactly which ones should I use and why?
I think THAT will start the conversation!
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Carl
3 Formalroofs (2x72, 1x73), 72 GTS 90 T-Bird SC, 3.8l SUPERCHARGED 97 Dakota 2WD,Ext cab, 5.2L 97 Suzuki Intruder 1400 Thats just my stuff! You should see the wife's "HER STUFF" list! |
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Regul8r
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Moderator Joined: 27-December-2007 Location: Ft Riley, KS Status: Offline Points: 2982 |
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Posted: 15-February-2010 at 4:00AM |
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OH, I forgot!
What will the compression ratio be with the stock heads and .030 over bored with KB pistons?
What SHOULD it be to be able to run on pump gas with NO ISSUES!
9:1, 9.5:1, 10....you get the picture!
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Carl
3 Formalroofs (2x72, 1x73), 72 GTS 90 T-Bird SC, 3.8l SUPERCHARGED 97 Dakota 2WD,Ext cab, 5.2L 97 Suzuki Intruder 1400 Thats just my stuff! You should see the wife's "HER STUFF" list! |
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302ford
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Joined: 25-February-2008 Location: vancouver Status: Offline Points: 155 |
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Posted: 28-February-2010 at 9:56AM |
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Because you are using a 347 I would recommend using aftermaket heads. An entry level edelbrock performer head or better yet, something along the lines of a trickflow t/w will see substantial gains. I would probably run a decent sized hyd flat tappet cam with something along the lines of 230* at .050 and .550 total lift. 1.6 roller rockers. I would also consider dropping both the gear drive and go with a simple double roller chain as well as rethinking your choice on runnning dual carbs. I dont have the calculations for what your comp ratio would be, but I would shoot for a 10:1 (what size dish are the pistons)
A simple 302 with a tiny cam and edelbrock performer heads ran 14's in my 4000 car. With a decent 347 you should see 13's running street tires and have good drivablitity.
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79 LTD II 408/TKO/3.7's
12.53 116.2mph. street tires |
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Regul8r
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Moderator Joined: 27-December-2007 Location: Ft Riley, KS Status: Offline Points: 2982 |
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Posted: 17-November-2010 at 2:42AM |
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New twist on all of this...
I am picking up an 87 Mercury Marquis 5.0 injected Roller motor.
The 347 stuff will all work if I bore the block, no issues there.
HERE is my question...
I have an opportunity to get a NON ROLLER Cam/lifter set up.
Can I just pull the roller cam/lifters out and replace with a non roller performance cam/lifter kit?
Pushrod length the same? Lifter bore same size? What about rockers and valve geometry? Spring tension?
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Carl
3 Formalroofs (2x72, 1x73), 72 GTS 90 T-Bird SC, 3.8l SUPERCHARGED 97 Dakota 2WD,Ext cab, 5.2L 97 Suzuki Intruder 1400 Thats just my stuff! You should see the wife's "HER STUFF" list! |
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madmaxtorino
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Joined: 05-August-2010 Location: Dunn Tn Status: Offline Points: 187 |
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Posted: 17-November-2010 at 3:58AM |
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You will need longer pushrods. Springs need to be matched to the cam specs. everything else should be the same.
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 Fuel Injected 429
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302ford
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Posted: 17-November-2010 at 5:28AM |
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Why would you like to go non-roller? Is it a large savings? In my opinion it would be much more benificial if you kept it a roller
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79 LTD II 408/TKO/3.7's
12.53 116.2mph. street tires |
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Regul8r
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Moderator Joined: 27-December-2007 Location: Ft Riley, KS Status: Offline Points: 2982 |
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Posted: 17-November-2010 at 2:09PM |
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yes it is better to keep the roller motor but have a GREAT deal on non roller engine kit with cam and lifters. I guess I'll pick that one up and use it on the 72 302 that is still in my 72 in the driveway.
Right now, I just found out the motor and tranny I am picking up today is still bolted together!
SO... engine degreaser and the car wash... then Paint and install in the Power Tour 72 Torino.
87 Marquis motor with 40,000 miles... reliable and gas MPG should be good. Actually looking at staying with a 2bbl just for MPG Economy. Just put together a good running reliable car!
Rather have something nice to drive than a POS sitting in the driveway with big dreams!
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Carl
3 Formalroofs (2x72, 1x73), 72 GTS 90 T-Bird SC, 3.8l SUPERCHARGED 97 Dakota 2WD,Ext cab, 5.2L 97 Suzuki Intruder 1400 Thats just my stuff! You should see the wife's "HER STUFF" list! |
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Regul8r
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Moderator Joined: 27-December-2007 Location: Ft Riley, KS Status: Offline Points: 2982 |
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Posted: 28-November-2010 at 4:30AM |
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Which Cam and WHY?
Stock 87 5.0 heads and valve springs, 347 stroker kit bored .030 over.
I am not a cam understanding guy!
Duration, lift, separation bla bla bla!!!
ALL GREEK TO ME!
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Carl
3 Formalroofs (2x72, 1x73), 72 GTS 90 T-Bird SC, 3.8l SUPERCHARGED 97 Dakota 2WD,Ext cab, 5.2L 97 Suzuki Intruder 1400 Thats just my stuff! You should see the wife's "HER STUFF" list! |
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Blueoval76
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Member of the Stroker Club Joined: 20-February-2010 Location: Sussex WI Status: Offline Points: 600 |
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Posted: 28-November-2010 at 9:06AM |
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A little advice on this setup before even thinking about a cam. The 347 is great and with dual quads should be fine. However the stock heads are Really going to choke the living breath out of a 347 stroker. Sorry but to run two 450 carbs and a 347 through coffee stir sticks is not going to work well. THe biggest improvement you can make on a 302 is the heads. The 347 is already asking for a 185cc head flow and I would recomend at least the Trick Flow 170 twisted wedge heads. I was just about to buy these heads on Friday morning but Black Friday got the best of me and I have to put them off for a few months now. The biggest kicker is that these heads are on sale till the 30th at $1012 Shipped from Summit and regularly sell for $1300! I just cant resist the black fri deals
 
Anyways I feel IMHO that you are going to have problems due to lack of flow in the heads.
Jesse
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1975 Gran Torino 347/C6/4.56
1997 Ford Expedition 4X4 3.73LSD |
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Regul8r
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Moderator Joined: 27-December-2007 Location: Ft Riley, KS Status: Offline Points: 2982 |
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Posted: 28-November-2010 at 4:01PM |
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The 302/247 is not getting the Dual Quads anymore.
Will get a single 4BBL
Heck this whole project might get scrapped and just throw the stock 87 5.0 in it.
Will pull the heads, clean them, replace valve seals and check the cylinder walls.
Supposedly this motor has 40,000 original miles, should look good in there.
And NO WAY I am spending that much on heads!
I am just not a big money spender.
IF I find another set of good used GT40 heads... THAT would send me to the 347 kit without question.
I know a mild/good cam will wake it up alot. IF i reach in the exhaust ports and grind out the humps it will help too!
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Carl
3 Formalroofs (2x72, 1x73), 72 GTS 90 T-Bird SC, 3.8l SUPERCHARGED 97 Dakota 2WD,Ext cab, 5.2L 97 Suzuki Intruder 1400 Thats just my stuff! You should see the wife's "HER STUFF" list! |
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Blueoval76
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Member of the Stroker Club Joined: 20-February-2010 Location: Sussex WI Status: Offline Points: 600 |
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Posted: 28-November-2010 at 5:45PM |
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Ok I am glad you decided to not use the dual quads and I would look for a set of GT40 heads at least for the 347 and yes if you know how to port then I stand corrected on buying new heads. Dont pick your cam until you know exactly what you are going to use. I am goint to be running a freshened stock 302 with a stock bore, Trick Flow 170 heads, and I am going to have a custom cam ground by Jay Allen. He is one of the top notch grinders out there for a SBF. I won't recommend him to you as its a steep $450 chunk of change just for a cam
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1975 Gran Torino 347/C6/4.56
1997 Ford Expedition 4X4 3.73LSD |
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Regul8r
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Moderator Joined: 27-December-2007 Location: Ft Riley, KS Status: Offline Points: 2982 |
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Posted: 11-December-2010 at 2:20AM |
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Killing this thread after I get some last piece of info...
Specs and differences between the B303 vs E303 roller cams
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Carl
3 Formalroofs (2x72, 1x73), 72 GTS 90 T-Bird SC, 3.8l SUPERCHARGED 97 Dakota 2WD,Ext cab, 5.2L 97 Suzuki Intruder 1400 Thats just my stuff! You should see the wife's "HER STUFF" list! |
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Blueoval76
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Posted: 11-December-2010 at 3:02AM |
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Ford Racing #397-M-6250-B303
Duration'': 224°/224° @ .050'' Lift: .480''/.480'' Notes: Fair Idle, Good Low-End Torque, Significant Top-End Power Above 4,000 RPM Ford Racing #397-M-6250-E303 Duration: 220°/220° @ .050'' Lift: .498''/.498'' Notes: Good Idle, Excellent Low- and Mid Range Torque, Great for superchargers. |
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1975 Gran Torino 347/C6/4.56
1997 Ford Expedition 4X4 3.73LSD |
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Regul8r
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Moderator Joined: 27-December-2007 Location: Ft Riley, KS Status: Offline Points: 2982 |
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Posted: 11-December-2010 at 3:16AM |
Think for my street runner doing alot of highway 1500-3000 rpm running I should run the E303?
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Carl
3 Formalroofs (2x72, 1x73), 72 GTS 90 T-Bird SC, 3.8l SUPERCHARGED 97 Dakota 2WD,Ext cab, 5.2L 97 Suzuki Intruder 1400 Thats just my stuff! You should see the wife's "HER STUFF" list! |
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madmaxtorino
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Posted: 11-December-2010 at 3:18AM |
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yes
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Fuel Injected 429
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Regul8r
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Moderator Joined: 27-December-2007 Location: Ft Riley, KS Status: Offline Points: 2982 |
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Posted: 20-December-2010 at 1:25AM |
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Sold/traded the Stroker kit so letting this thread DIE for the time being!
Thanks for all the info!
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Carl
3 Formalroofs (2x72, 1x73), 72 GTS 90 T-Bird SC, 3.8l SUPERCHARGED 97 Dakota 2WD,Ext cab, 5.2L 97 Suzuki Intruder 1400 Thats just my stuff! You should see the wife's "HER STUFF" list! |
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inenidok
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Posted: 09-October-2011 at 6:43AM |
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well i am going the 347 stroker kit for sure, the local machine shop said he could do it for 1300 to 3000.00 depends on block work and what kit. i am planning on running dual quad setup and possible running nos in a few months so i am looking for a set of 70 cc heads to lower the compression, and good lowend torque cam. i am setting a goal of 450 to 500 hp, just like to have hp engine that fits todays new engines
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Blueoval76 wrote: