[88Hatch331]

OK, I have searched but there is too much info Im needing to find out for sure what I'm needing to know. I figured it would be easier to ask and some of the more experienced to come and answer for me. Im planning a build so Im trying to figure out a money plan.

1)Stroking the motor out 331vs347. I need to know the pro's and con's. Im looking for a realiable/strip car if that makes since. Want to have fun at the track and be reliable on long trips if needed.

2)What heads are the best for a forced induction application? I have searched and came across a few but didnt determine which were better.

3)Which intake manifolds are best? Again, I have come up with multiple findings.

Thanks in advance.

[ryans88gt]

1) 347
2) There are a lot, 61-64+ cc combustion chambers are nice for forced induction
3) TFS R, Holley sytemax 2, victor 5.0, etc...

[White Thunder]

Originally Posted by ryans88gt 1) 347 2) There are a lot, 61-64+ cc combustion chambers are nice for forced induction 3) TFS R, Holley sytemax 2, victor 5.0, etc...

this guys knows alot more than me so

+1

[88Hatch331]

Originally Posted by ryans88gt 1) 347 2) There are a lot, 61-64+ cc combustion chambers are nice for forced induction 3) TFS R, Holley sytemax 2, victor 5.0, etc...

1) ok, but I wanted pro's and con's on each
2) certain names to look for? or are they about the same?
3)Are they about equal in power, just different designing and pricing?

[White Thunder]

tomorrow my dear sir.....

[ryans88gt]

1) 331
pros: its bigger than a 302
Cons: smaller than a 347

347
pros: bigger than a 302
cons: not as big as a 408

No real difference between a 331 and 347 stroker other than the 16 cubic inches and about 20 hp. Also the compression will be a bit higher with a 347, so something to keep in mind if you are planning forced induction

2) Canfield, TFS, edelbrock all make great heads. AFRs might have too small of combustion chambers without some CNC work for forced induction...depends on how much boost you want to run

3)Holley systemax tends to produce the most power NA, but forced induction has a tendency to equalize similarly matched intakes.

[88Hatch331]

Originally Posted by ryans88gt 1) 331 pros: its bigger than a 302 Cons: smaller than a 347 347 pros: bigger than a 302 cons: not as big as a 408 No real difference between a 331 and 347 stroker other than the 16 cubic inches and about 20 hp. Also the compression will be a bit higher with a 347, so something to keep in mind if you are planning forced induction 2) Canfield, TFS, edelbrock all make great heads. AFRs might have too small of combustion chambers without some CNC work for forced induction...depends on how much boost you want to run 3)Holley systemax tends to produce the most power NA, but forced induction has a tendency to equalize similarly matched intakes.

Thanks! Im planning on running the procharger d1 just as an fyi. Also I just read an article about different intake manifolds and it seems that edelbrock victor 5.0 had the best hp #'s but lower tq than the gt40 as well as the other names. here is the article even though you may not need to read it since your already so inclinded.Super Intake Shootout - Muscle Mustangs and Fast Fords

[Stangzilla]

Originally Posted by ryans88gt 1) 331 pros: its bigger than a 302 Cons: smaller than a 347 347 pros: bigger than a 302 cons: not as big as a 408 No real difference between a 331 and 347 stroker other than the 16 cubic inches and about 20 hp. Also the compression will be a bit higher with a 347, so something to keep in mind if you are planning forced induction 2) Canfield, TFS, edelbrock all make great heads. AFRs might have too small of combustion chambers without some CNC work for forced induction...depends on how much boost you want to run 3)Holley systemax tends to produce the most power NA, but forced induction has a tendency to equalize similarly matched intakes.

+151442 except the compression part. You can get what ever compression you want in a 347 just like a 331..

[ryans88gt]

Originally Posted by Stangzilla +151442 except the compression part. You can get what ever compression you want in a 347 just like a 331..

To clarify, using the same type piston a 347 will have higher compression than a 331. There are many choices, but most builders only offer a couple, depending on what parts they prefer.

BTW, seeing stangzilla post on here reminded me that the spyder intake might also be a good choice for a forced induction 347.

[ryans88gt]

Originally Posted by 88Hatch331 Thanks! Im planning on running the procharger d1 just as an fyi. Also I just read an article about different intake manifolds and it seems that edelbrock victor 5.0 had the best hp #'s but lower tq than the gt40 as well as the other names. here is the article even though you may not need to read it since your already so inclinded.Super Intake Shootout - Muscle Mustangs and Fast Fords

Thanks, but I read that article years ago, it is a decent comparo. You should note that the GT-40 lower was ported in that comparo. The lower isn't great, especially the #1 and #5 runners. I you want to run a GT-40, lower porting is highly recommended.

[Speedstang302]

i would quote something and +1 it ryan but that all was great..couldnt have done it better myself..except does anyone run brodix heads on small block ford strokers?

[1slo5.0]

Originally Posted by Speedstang302 i would quote something and +1 it ryan but that all was great..couldnt have done it better myself..except does anyone run brodix heads on small block ford strokers?

Yep. Brodix is a popular head.

[86_Notch]

dss claims that a 331 will make more power then a 347, they claim that the 347 suffers from more frictional losses something about the additional stroke causing the bottom of the piston to come out of the bore and being pushed more against the cylinder wall instead of up the bore. they claim the 331 to be worth some 30 more hp and advise that the 347 should be mainly used in heavier cars with autos and less gear. personally i'd save for a windsor swap, much better block, better head sealing, bigger head bolts, more room to grow, more torque

[1slo5.0]

Originally Posted by 86_Notch dss claims that a 331 will make more power then a 347, they claim that the 347 suffers from more frictional losses something about the additional stroke causing the bottom of the piston to come out of the bore and being pushed more against the cylinder wall instead of up the bore. they claim the 331 to be worth some 30 more hp and advise that the 347 should be mainly used in heavier cars with autos and less gear. personally i'd save for a windsor swap, much better block, better head sealing, bigger head bolts, more room to grow, more torque

We did this comparison years ago with two identical engines with the only difference being 331 vs 347. DSS is wrong. If that was true 454 Chevy engines would be behind the 8 ball from the factory and all big inch strokers would suffer these frictional horsepower losses because as you increase the stroke you increase the angle of the connecting rod to the cylinder wall. Draw it out on paper and it will make sense.

[ryans88gt]

Originally Posted by 86_Notch dss claims that a 331 will make more power then a 347, they claim that the 347 suffers from more frictional losses something about the additional stroke causing the bottom of the piston to come out of the bore and being pushed more against the cylinder wall instead of up the bore. they claim the 331 to be worth some 30 more hp and advise that the 347 should be mainly used in heavier cars with autos and less gear. personally i'd save for a windsor swap, much better block, better head sealing, bigger head bolts, more room to grow, more torque

Well, myself, I would always go with a 408 given the choice. The price is similar and you get a lot more for your money. I'm not sure about better head sealing, but it is a stronger block for sure.

As for a 331 making more power, I have talked to the guys at DSS many times and even visited their facility a couple times. I've never heard them say anything about a 331 making more power than a 347. If they did say that, I'd laugh and ask to see the dyno numbers. By that logic a 306 makes more power than a 331, so why go with a stroker kit at all. A lot of people go the 331 route because it produces lower compression numbers without having to have a huge dish which typically promotes detonation. While they might put a little less side load on the piston than a 347, I don't think it makes a difference longevity wise.