Supercharged 306, 331, or 347

9

98blkcnvrt

Member

Oct 17, 2003

62

0

6

santa rosa california

Apr 27, 2005

#1

• Apr 27, 2005

• #1

I am preparing to build a motor I am trying to decide what to build that would be the biggest bang for the buck, I am going to run Trickflow heads a motorsport F cam, and a Trickflow intake. I already have the s trim supercharger.

WHAT SHOULD I DO? HELP ME OUT GUYS!!

 

Q

qplk11

New Member

Feb 8, 2004

82

0

0

Maryland

Apr 28, 2005

#2

• Apr 28, 2005

• #2

From what I understand, if you are going to drive it a lot, get the 331. If not, go for the 347. The F cam is a great SC cam. Good luck!

 

Blk91stang

Member

Jan 3, 2003

607

0

16

North Brunswick, NJ

Apr 28, 2005

#3

• Apr 28, 2005

• #3

I am also going the 331 S-trimmed route which should make 550+rwhp easily. Unless you plan on making more than that, I'd stay with a 331 for the most reliability.

 

Stroked91

New Member

Jan 15, 2004

25

0

0

Apr 28, 2005

#4

• Apr 28, 2005

• #4

I've got a S-Trimmed 331. Decided on a 331 over the 347 because of the reliability as well. I asked a lot of questions and did some reading and from what I could dig up, a 347 lasts about 60K -vs- 150K with the 331.

 

B

BaXTeR3221

Member

Jan 12, 2004

917

0

16

Orange County, NY

Apr 28, 2005

#5

• Apr 28, 2005

• #5

Go w. a custom cam.

 

Grn92LX

Fidanza Man!

Founding Member

Jan 14, 2001

6,819

64

129

New York

Apr 28, 2005

#6

• Apr 28, 2005

• #6

If your putting this on a stock block, go with a 306. If your using a good block, go 347. Anyone who tells you a 331 is more reliable than a 347 doesn't know a thing about this stuff. You can hit 500rwhp with the 306, but i'd tone it down. With a stroker your nuts putting that stuff in a stock block.

 

Ranchero5.0

The Voice of Reason

Jan 1, 1999

5,306

0

76

Hagerstown MD

Apr 28, 2005

#7

• Apr 28, 2005

• #7

Ditto on the stock block blown strokers, plus the F cam isn't a very good cam for a street puter governed car because it lays an egg until it hit's about 3200rpm and you are half way out of R'rs. Been there, unhappy with that on a customers car. Not a very good combo unless you like the lopy idle and a lot of noise comming out the back while you go nowhere fast...

A good mild torque cam, long runner intake and a mild blower and you will be running a big block at WOT, but cruising a small block to the gas pumps.

Jamie

 

$uperstang

New Member

Jul 20, 2004

476

1

0

Detroit, MI

Apr 28, 2005

#8

• Apr 28, 2005

• #8

Go with a 331 stock block is fine unless you plan on driving full throttle all the time. Just make sure you get it magnefluxed, boiled and use a main girdle you will be fine.

 

N8Miller

I need NOS....make it 2 of the big ones

Founding Member

Jul 26, 2000

2,661

0

0

Kingston, PA, USA

Apr 28, 2005

#9

• Apr 28, 2005

• #9

Grn92LX said:

If your putting this on a stock block, go with a 306. If your using a good block, go 347. Anyone who tells you a 331 is more reliable than a 347 doesn't know a thing about this stuff. You can hit 500rwhp with the 306, but i'd tone it down. With a stroker your nuts putting that stuff in a stock block.

Click to expand...

hes right. if you go too much with a stock block your already gonna have 1 hand in the fire. if you want to do a stroker motor, look into any aftermarket block and then (basicly) your power is endless as to what you can throw at it.

 

W

WhiteHeat306

Member

Nov 28, 2004

283

1

16

Philadelphia Suburbs

Apr 28, 2005

#10

• Apr 28, 2005

• #10

Grn92LX said:

If your putting this on a stock block, go with a 306. If your using a good block, go 347. Anyone who tells you a 331 is more reliable than a 347 doesn't know a thing about this stuff. You can hit 500rwhp with the 306, but i'd tone it down. With a stroker your nuts putting that stuff in a stock block.

Click to expand...

Anyone wanna send me a supercharger for my 306? I'll beat the ***** outta the car and we'll see how long it lasts.

 

9

98blkcnvrt

Member

Oct 17, 2003

62

0

6

santa rosa california

Apr 29, 2005

#11

• Apr 29, 2005

• #11

Blk91stang said:

I am also going the 331 S-trimmed route which should make 550+rwhp easily. Unless you plan on making more than that, I'd stay with a 331 for the most reliability.

Click to expand...

Are you using a stock block, What cam are you going with?

 

9

98blkcnvrt

Member

Oct 17, 2003

62

0

6

santa rosa california

Apr 29, 2005

#12

• Apr 29, 2005

• #12

qplk11 said:

From what I understand, if you are going to drive it a lot, get the 331. If not, go for the 347. The F cam is a great SC cam. Good luck!

Click to expand...

It's just a weekend car street/strip car not a daily driver.

 

Rick 91GT

Mustang Master

Nov 29, 1999

9,692

95

99

PA

Apr 29, 2005

#13

• Apr 29, 2005

• #13

There is no reliabilty issues with a 347 vs a 331, you can not predict how long each will last, built correctly you will not have any issues.

I suggest a 331, you can get a more blower friendly compression ration with a shelf piston over the 347. Also unless you go with a 5.315" rod based 347 you get a slightly taller compression height piston with the 331.

I build a lot of both, you will not have any issues. If you are going to put better then stock internals in the motor definitly go with the stroker. If you are using a stock block, you'll break the block before you hurt a good cast crank, forged rod, forged piston combo. If you are planning on moving up to a DART SPortsman $1800 or Iron Eagle $2100 then I would suggest going with a Forged crank so you can have a near bullet proof assembly, with a rod bolt upgrade you can take the HP rating from about 800 to 1100+.

 

Modular2v

Founding Member

Jun 30, 2002

3,222

23

99

oklahoma

Apr 29, 2005

#14

• Apr 29, 2005

• #14

so far so good on my 331 build....just got everything fitted last night...now i have to notch the skirts and re-vat the block! Like rick said...BUILT RIGHT one is not going to be more reliable than the other