HACKGT350

im going to be getting new head as a graduation pressent for my 84 mustangs. what ones should i got wiht i was looking at the gt40z's they looked really nice and if anyone could recomend a good cam with a really good set of heads price really doesnt matter for the heads i would prefer it to be under 2k other wise ill be paying the difference

[IMG]local://upfiles/28839/9B6C6454B87A4DCE8A7E1706722E862D.jpg[/IMG]

Black Snake

If your going to get it for a present dont go with the cast iron GT40s, get some aluminum heads like trickflow, edelbrock, or AFR.

Crazyfast50stang

yeah I would recommend AFR also. They did the best in mm&ff. Also a good cam would be the Trickflow stage 1 cam. If you dont go with the afr then go with the twisted wedge heads also with the trickflow stage 1 cam.

wildcobrar

AFR aluminuns and in the least the 185 cc intake runner heads. They are not overkill on a 302/306 and you will have room to grow power wise down the road if you cube up or get radical with the beast. AFR got 455HP out of the 185 cc heads @6100 RPM using the Comp Ex 282 Hyd roller cam on a carbed pump gas 306 so you would have quite a weapon if your ride is 5sd equiped.

primetime5.0

uhh you have a link to that?

OnyxCobra

Actually Ive heard 185s are over kill on pretty much any n/a 5.0. From what ive heard ud be better off goin with the 165s...

wildcobrar

As for the AFR heads, I installed a set of 185's on a 306 with E303 cam(needed a cam I knew would pass smog test) Cobra intake and degreed the cam in 4 degrees advance. On a chassis dyno DaSilva's racing in Toronto Ont. Canada. The car laid down a very flat torque curve with 306 FT lbs to the tires and 296 HP to the tires without the BBK cold air fender well kit or underdrives as these were still on order. Both the 165 and 185 heads make the same power down low with the 185's taking over at 5000 rpm. This little mill has a very flat torque curve. Just 15 ft lbs shy of 300 at 2000 rpm and holding 391 ft lbs at 6100 rpm. This would be one stout 302 for street duty in a 5 spd Mustang and with a 150 hit of the spray it would more than likely run solidly in the 10's in the 1/4 mile.


TRQ HP
2000 285 105
2500 296 139
3000 326 186
3500 342 228
4000 362 275
4500 374 320
5000 387 368
5500 398 417
6000 392 448
6100 391 455
6500 348 430
7000 n/a
7500 n/a




Dyno Test Criteria
Horsepower: 455 HP
Engine: 302ci
Heads: 185cc AFR
Compression: 10:1
Carburetor: 650 cfm Speed Demon 84/87 Jets

Ignition: MSD Digital 7, 36° Timing
Cam: Comp Cams Extreme Energy Hyd Roller 282 Cam, 565/574 232/240 @.050 with 1.6 Rockers, 112 Lobe Sep.


Exhaust: 1 3/4

Fuel: 92 Octane
Manifold: Victor Jr.

wildcobrar

Do a Google search on Air Flow Research Inc. Then on the home page click on dyno results on the top of the page. You will see that the 185 heads make great down low power on a 302 and have a very flat torque curve with awsome power. They are not TOO big for a 302. They can be if you choose the wrong set up for the car. This motor is great for a stick car but an auto run on the street, maybe not.

AFR link http://www.airflowresearch.com/

HACKGT350

thats great cause i have a 5 spd. what intake manifold should i got with i want to be a street driver and occationaly go to the track to see what i can do but i dont need anything crazy like the victors or victor jr. i have heard the edlebrock air gaps work wonders but i dont know if thats enough with the heads and cam.

88BlueGT

The Air Gap will be enough and it would probally be the best manfiold to run with.