306 vs 347

8

87stang306

New Member

Nov 20, 2005

8

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0

Jan 19, 2006

#1

• Jan 19, 2006

• #1

i have a 306 with vitor jr intake, 650 speed demon carb,afr185 heads,1.6 roller rockers,comp cam XE274. i was wondering on how much horsepower and torque difference a 347 with this same setup would make. i am gonna bolt this setup on and am just wondering how much the horsepower and torque numbers would change. thanks

 

3

304billet

Member

Sep 16, 2005

315

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16

Jan 19, 2006

#2

• Jan 19, 2006

• #2

about 50rwhp and 50rwtq.

 

QDRHRSE

New Member

Dec 31, 2002

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Palmdale, CA

Jan 19, 2006

#3

• Jan 19, 2006

• #3

Inches always help. I't hard to say how much though unless you have your own dyno...or experience.

 

88Stangboy

Banned

Dec 12, 2005

342

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0

Greenville, SC

Jan 19, 2006

#4

• Jan 19, 2006

• #4

ditto....50hp, 50trq.....not enough to justify the money and work in my opinion. If i were you, id start from scratch and build 393 or 408. You'd definitly be pleased. That should be plenty enough room to grow into just about anything you want to do.

 

3

304billet

Member

Sep 16, 2005

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Jan 20, 2006

#5

• Jan 20, 2006

• #5

The only reason u s/b considering doing a 347 was if ur 306 needed refreshed. There r plenty of ways to make their power and beyond. Go nitrous 150 shot.

 

mytight95

Active Member

Apr 11, 2003

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46

Dothan,Al

Jan 20, 2006

#6

• Jan 20, 2006

• #6

sorry to intrude in the thread, but say price versus power which one is more economic, a budget 347 or a 306.... which one would last longer?



subscribing btw


jason

 

90mustangGT

I felt sorry for girls because

Founding Member

Jan 15, 2002

2,773

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89

Dallas, GA

Jan 21, 2006

#7

• Jan 21, 2006

• #7

It depends. Is the 347 going to have the same compression and such? Saying everything else is the same, the only difference is the cubes, I would say you'll pick up some horse, and especailly a much wider, stronger torque curve. AFR 185's and a Victor Jr. intake is kind of big on a 306 unless your running some RPM. If you need a new motor, the 347 is definatly the best bet, but if your just trying to get some more power, there are other ways.