Question about compression ratio?

nonosstang

Founding Member

Nov 9, 2001

142

0

0

Newark, CA

May 15, 2005

#1

• May 15, 2005

• #1

Hello,

I would like to add a supercharger sometime in the future and had a question.

I'm planning on changing my pistons to drop my compression down to 8.5:1 and change to a blower cam so that I would be able to add forced induction in the future.

My question is, how would the car drive on the street without the blower? Currently, it's a '66 mustang with a 347 stroker with around 500hp.

Thanks.

 

H

HuKares

New Member

Nov 19, 2002

90

0

0

Canton, Ohio

May 16, 2005

#2

• May 16, 2005

• #2

This is not is answer as to how well it would work with your combo, but an 8.5:1 compression engine can still perform well without FI. I 'm running just under 8.5:1 in the engine listed below and haven't put the supercharger belt on yet. I haven't moved the car anywhere but around the driveway but it seems to perform well.

 

rbohm

Founding Member

Apr 12, 2002

6,698

550

204

tucson,az

May 16, 2005

#3

• May 16, 2005

• #3

depending on your current compression ratio, you may or may not feel a loss of torque on the low end. drivability wont suffer much if at all, depending on your cam grind. overall you shouldnt have any problems that cant be sovled with a little tuning.

 

65ShelbyClone

Founding Member

Sep 9, 2000

4,675

38

119

Antelope Valley, SoCal

May 16, 2005

#4

• May 16, 2005

• #4

If your 347 is a truly honest 500hp, you wouldnt want a blower. The early blocks are a tad stronger than the late rollers, but they still split around 500-600hp.

To answer the question, your engine will feel softer than before, but drivability will be unaffected.