AFR or Twisted Wedge?

G

grainboy

Member

Feb 2, 2006

140

0

17

Goodyear, AZ

Mar 11, 2007

#1

• Mar 11, 2007

• #1

I just rebuilt a 91 302, installed a crane 2020, and topped it off with a pair of Windsor Jr heads, Offenhouser dual plane and a new 600 holley. I am disapointed to say the least. I think the 180 cc intake runners are killing the bottom end, and the cam is too small to develop power on top end. I want to swap the heads for either AFR 165 or Trick Flow TW. I am pretty sure what response I will get on this board, but want to know anyway.
Thanks.

 

SoCalCruising

Founding Member

Jul 25, 2000

2,437

0

47

SoCal

Mar 12, 2007

#2

• Mar 12, 2007

• #2

You need specific TW pistons if you will change out cams and exceed a certain lift and duration. Check with Trick Flow on the limits. If you will stay with a cam of around 0.500" lift, then non-CNC'd TW heads are a very good choice. They flow very well to that lift and then level off. AFRs will probably make more power if you use a higher lift cam (maybe 0.550 and up). CNC'd TWs are a different story. They make big-time power with more cam.

Is that Offy the one with the dual runner system? If so, I'd dump it and get a Stealth or Performer RPM Air-Gap.

 

Vinyl66

Member

Mar 21, 2004

398

0

16

Mar 12, 2007

#3

• Mar 12, 2007

• #3

I agree with SoCal. Both the AFR and the Twisted Wedge heads are great choices. Can't go wrong with either head. The Windsor Jr's should make decent power with a correctly matched cam.

What are the specs of the Crane 2020? Isn't that a fairly small cam for a performance application?

What gears are you running?

Auto or stick? If auto, what stall converter?

It takes an entire combo to be fast. You could have a great performing engine but without the right gears and stall it would feel gutless down in the low rpm's.

 

jspagna1

Member

Jan 23, 2007

53

0

6

Connecticut

Mar 12, 2007

#4

• Mar 12, 2007

• #4

Both these guys are right on the money. Both heads are great. I have the TFS TW on mine & have been very happy with them. Went from GT40 Iron Heads to the TFS TW heads and picked up a lot more torque with them. Happy shopping!

 

Vinyl66

Member

Mar 21, 2004

398

0

16

Mar 12, 2007

#5

• Mar 12, 2007

• #5

jspagna1 said:

Both these gays are right on the money.

Click to expand...

I can't speak for SoCal but I am straight.

 

jspagna1

Member

Jan 23, 2007

53

0

6

Connecticut

Mar 12, 2007

#6

• Mar 12, 2007

• #6

Oh Sh........t. Sorry man. Do you think spell check would have caught that? Later.

 

SoCalCruising

Founding Member

Jul 25, 2000

2,437

0

47

SoCal

Mar 12, 2007

#7

• Mar 12, 2007

• #7

Yup, today is my 30th wedding anniversary.

 

mustbereel

Member

May 6, 2005

318

0

17

Escondido, CA

Mar 12, 2007

#8

• Mar 12, 2007

• #8

oops

You know jspagna 1, you can go back and edit that. Of course it's pretty funny.

Happy anniversary Socal. 30 years!

 

jspagna1

Member

Jan 23, 2007

53

0

6

Connecticut

Mar 13, 2007

#9

• Mar 13, 2007

• #9

Mustbereel, I did edit my reply. I showed my wife what I did and the return comments and she cracked up. Too funny!

 

SoCalCruising

Founding Member

Jul 25, 2000

2,437

0

47

SoCal

Mar 13, 2007

#10

• Mar 13, 2007

• #10

Thanks, Mustbereel. Same woman, too.

 

1

10secgoal

Active Member

Dec 1, 2003

2,801

3

49

San Diego

Mar 13, 2007

#11

• Mar 13, 2007

• #11

Each are good, each has there down fall.
AFR's like to strip at the header threads. Easy to fix if addresed before hand. TW like to crack between the seat on the valves.

 

SoCalCruising

Founding Member

Jul 25, 2000

2,437

0

47

SoCal

Mar 14, 2007

#12

• Mar 14, 2007

• #12

My leaning is basically this for a street motor: if you can find a conventional, 20* inline head that meets your performance needs, use that head. Other designs often have some issues. These issues may not be material on a racing engine, however. In that regard, I would not hesitate to bolt up a set of Cleveland-style CHI heads on a Windsor-style racing engine. So, IMO, take your pick based on how the engine will be used.