331 with afr 165cc

A

ac09lude

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Jun 17, 2005

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Long Island, N.Y.

Nov 18, 2005

#1

• Nov 18, 2005

• #1

i want to build a 331 within the next 3 months but was wondering if i can still use my afr 165? i plan on using all the parts in my sig, but the cam, i would like to go custom. what should i do? get 185 or keep my 165. i would like to make 350-375 rwhp with the new motor. i'm currently making 300 to the wheels.
Thanks

 

SQUEEZE&STROKE

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Jun 24, 2005

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SOUTHERN CA

Nov 18, 2005

#2

• Nov 18, 2005

• #2

Too small IMO, upgrade to 185's or even a victor jr (What I run on my 331)

Upgrade those injectors and fuel pump and get a custom cam.

The 185's and that intake should work well together...if you really want power go with the vic jr's with the TFS R or RPM2

 

maverick0716

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Nov 18, 2005

#3

• Nov 18, 2005

• #3

You could still make a ton of power with the 165's but the 185's would be better.

 

S

Sicarius428

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Jan 6, 2004

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Nov 18, 2005

#4

• Nov 18, 2005

• #4

185s would be ideal but 165s will work. You shouldn't have too much trouble hitting 350 with a tune. Maybe some 30lbs injectors would help you some.
Kevin

 

2000xp8

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Aug 8, 2003

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Nov 18, 2005

#5

• Nov 18, 2005

• #5

Since you already have the heads, and they aren't cheap, you may want to think about just putting a couple hundred into them. Done correctly A valve job, bowl cleanup and maybe a mild hand or CNC port could probably make them better than 185's, and you wouldn't have to go through the trouble of selling them and getting another set.

 

A

ac09lude

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Jun 17, 2005

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Nov 18, 2005

#6

• Nov 18, 2005

• #6

you guys don't think the valves are to small?

 

Dbeck002

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Nov 18, 2005

#7

• Nov 18, 2005

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those heads are fine for a 331. Yes you could make more power with the 185s, you could make even more with 205s... its all relative...

Again i would just keep the heads, possibly invest in some 2.02 stainless valves and light porting but nothing to break the bank. If it were up to me i would just bolt them down and call it a day. 350 RWHP is attainable with a combo like that and a good cam. Remember those AFR heads dont f-ck around.

 

A

ac09lude

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Jun 17, 2005

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Long Island, N.Y.

Nov 18, 2005

#8

• Nov 18, 2005

• #8

so if i just bolt the heads down box stock, what else would you change about my combo besides the cam.

 

Cobra4075

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Feb 18, 2002

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Tinley Park, IL

Nov 18, 2005

#9

• Nov 18, 2005

• #9

I thought the 165's and the 185's are the same head. The 185's just have more porting to the intake runners. I know they have the same size valves and exhaust runners.

 

Grn92LX

Fidanza Man!

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Nov 18, 2005

#10

• Nov 18, 2005

• #10

ac09lude said:

so if i just bolt the heads down box stock, what else would you change about my combo besides the cam.

Click to expand...

The valve springs, the manifold, the tb (depending what size you have now) to 75mm and take a grinder and open up the restrictive bbk collector. The holley manifold will work well IMO. I would mill the heads too.

Go 347 instead of a 331. I dunno why you'd give up 16 free cubic inches? Seeing that you're on LI, we can meet up one night and run em :Track:

 

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IntenseBlue

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Jul 10, 2005

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Nov 18, 2005

#11

• Nov 18, 2005

• #11

They'll flow more to a 331 than stock heads do to a 302.

 

RacEoHolic330

I like to dress like a pretty girl

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Nov 18, 2005

#12

• Nov 18, 2005

• #12

Cobra4075 said:

I thought the 165's and the 185's are the same head. The 185's just have more porting to the intake runners. I know they have the same size valves and exhaust runners.

Click to expand...

nope. 185's have a 2.02 intake valve while 165's have a 1.90

 

2000xp8

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Nov 18, 2005

#13

• Nov 18, 2005

• #13

Dbeck002 said:

those heads are fine for a 331. Yes you could make more power with the 185s, you could make even more with 205s... its all relative...

Again i would just keep the heads, possibly invest in some 2.02 stainless valves and light porting but nothing to break the bank. If it were up to me i would just bolt them down and call it a day. 350 RWHP is attainable with a combo like that and a good cam. Remember those AFR heads dont f-ck around.

Click to expand...

Well, for cost effectiveness, if you are going to change the valves, it would be better to sell the heads, and get the 185 set. Good Valves are not cheap, couple that with a valve job, bowl cleanup and mild porting and cost is too high.