|
Author
|
Topic: what do you think about these heads?
|
ShiftyGT
¯
Member # 3862
|
posted
 
 
Holleys
300-574 165cc 71cc 63cc
flow number:@.5 lift 228 / 164
Valves:2.02" 1.60" pedestal 5/16"
maxlift: .600"
I have bbk cold air, 70mm throttle, cobra intake, the rest of the engine is stock. running headers, xpipe and flowies with 4:10 gears. How do you think these heads will perform? HP gain?
are there some you would suggest over these with a price cap of around $1500?
lastly...can i still use these head once i go to a 331 stroker??
--------------------
1990 GT, Back in action
Posts: 396 | From: Chico CA | Registered: Dec 2003
| :
|
|
Stimson
_
Member # 51
|
posted
Those heads are just 'okay' 302 heads for a mild to medium build up. If you have a 331 planned, get some Trick Flow Twisted Wedge's or AFR 185's given your $1500 price cap.
Posts: 2373 | Registered: Jun 2000
| :
|
|
MR GO FAST
¯
Member # 2088
|
posted
quote:
Originally posted by st5150:
Those heads are just 'okay' 302 heads for a mild to medium build up. If you have a 331 planned, get some Trick Flow Twisted Wedge's or AFR 185's given your $1500 price cap.
no gt40's ![[Confused]](confused.gif)
--------------------
1986 Gt that is faster than FOSTANGS pinto
Posts: 3729 | From: ATWATER/SANJO/RWC | Registered: Nov 2002
| :
|
|
Fostang
¯
Member # 3752
|
posted
I feel you should ask people that have actually used them.
They would say otherwise.
Some guy on stangnet uses them on a vert heavy sn-95 and runs low 12's.
There is someone else here that is having a motor built with these heads on this board.
I wouldn't consider a mild 5.0 one that puts out 350 hp from some box stock heads as do the cars that have the complete systemax kit.
I'm not saying they are the best but certainly not the worst. Basicly flow the same as performer heads.
A port job would really wake them up later on.
[ December 19, 2003, 06:45 PM: Message edited by: Fostang ]
--------------------
67' Fastback TT 408
67' Camaro Lsx
64' Corvette Fuelie
57' Chevy Bel Air Lsx
68’ Pony Convertible
66’ Pony Coupe
Posts: 3011 | From: Stockton/Danville | Registered: Nov 2003
| :
|
|
ShiftyGT
¯
Member # 3862
|
posted
thanks for the reps guys, just doing some competitive shopping.
--------------------
1990 GT, Back in action
Posts: 396 | From: Chico CA | Registered: Dec 2003
| :
|
|
90gtverrt
¯
Member # 1437
|
posted
Hey i got to drive the car around for about 1 day, (ran into 1 small prob so i had to take it back) but the car feels real healthy with those heads, my car is set up for boost though and my compression is only around 8.3-4 with those heads on there. Ill let you know once i get the car back fully. I went with the heads since they were supposed to make the best low speed torque increase across the board. The HP was not very far off from the AFR but the decinding factor was torque for my streetcar.
Omg the sound is totally different with the car though with the holley intake and heads. Fuckin sounds like a beast ![[Smile]](smile.gif)
Mike
Posts: 1199 | From: Livermore, CA | Registered: Jun 2002
| :
|
|
90gtverrt
¯
Member # 1437
|
posted
Oh ya and the heads that i hve are these
P/N 300-575
Only difference, is mine are for 3/8 stud rockers and the 574's are for Pedestal type rockers.
Mike
Posts: 1199 | From: Livermore, CA | Registered: Jun 2002
| :
|
|
Stimson
_
Member # 51
|
posted
306ci89Vert- Any dyno numbers for your setup? If you're running ~10 lbs of boost, I'd expect somewhere in the lower to mid 400 rwhp range. These heads are really comprable to the revised Edelbrock performer heads.
Posts: 2373 | Registered: Jun 2000
| :
|
|
Fostang
¯
Member # 3752
|
posted
I was going with the same basic set up as 306 has.
S trim and even the crower cam.
Now all of it is up for sell except the s trim.
I'm going with a 347 CHP engine with vic jr heads and of course 10psi of boost with the water injection.
--------------------
67' Fastback TT 408
67' Camaro Lsx
64' Corvette Fuelie
57' Chevy Bel Air Lsx
68’ Pony Convertible
66’ Pony Coupe
Posts: 3011 | From: Stockton/Danville | Registered: Nov 2003
| :
|
|
90gtverrt
¯
Member # 1437
|
posted
Nope no dyno number here yet. Will be taking it to dyno end of January....just waiting to get car back...ill be at around 13pounds with the 2.95" pulley and power pipe....well see.
Mike
Posts: 1199 | From: Livermore, CA | Registered: Jun 2002
| :
|
|
AJBlackGT
¯
Member # 3936
|
posted
If your going to build a 331 later and have a price cap of 1500 I would definately go with the AFR 185s, they are about 1300. I have the 165s and they make great power, but with the 331 you want the 185s. Take a look at the MM&FF cylinder head comparison tests. They will tell you everything you need to know about all of the heads mentioned in this post.
--------------------
90 Notch
Posts: 1896 | From: Sacramento | Registered: Dec 2003
| :
|
|
jmcclesk
Moderator
Member # 1355
|
posted
check pm's, just for referance, mark and i did a car with ford y- heads e-303 cam, STOCK throttle body and intake manifold. At 8 pounds of boost with a MILD street tune it made over 400 rear wheel hp. ![[burnout]](graemlins/burnout.gif)
[ December 25, 2003, 01:08 PM: Message edited by: jmcclesk ]
--------------------
Ford trained ASE master tech.
Posts: 4024 | From: marrysville | Registered: May 2002
| :
|
|
Email this post to someone!
Printer friendly view of this Ford topic
