Need Help

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streetdemon70

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Dec 25, 2005

#1

• Dec 25, 2005

• #1

Got a new 302 Shortblock for my car for x mas and am wanting to have a mild street car with around 265-290 hp. What head cam intake combo will be needed to do this. It will have a roller cam in it keep in mind. thanks for the help. its goin in a 70 coupe. with a c4 behind it

 

rbohm

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tucson,az

Dec 25, 2005

#2

• Dec 25, 2005

• #2

1: heads, world products windsor jr, or afr 185's

2: intake, performer rpm

3: cam, xe262hr comp cam

 

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streetdemon70

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Dec 26, 2005

#3

• Dec 26, 2005

• #3

what carb? 600 or 650?

 

HistoricMustang

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Dec 26, 2005

#4

• Dec 26, 2005

• #4

streetdemon70 said:

what carb? 600 or 650?

Click to expand...

I vote for the 600 CFM with vac secondaries. Better to be a little under than over on the carb!

HistoricMustang
www.historicmustang.com

 

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streetdemon70

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Dec 26, 2005

#5

• Dec 26, 2005

• #5

thanks. is there a big difference in vac secondaries versues man secondaries

 

rbohm

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Dec 26, 2005

#6

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• #6

yes, vacuum secondaries open only when there is enough load on the engine to require extra fuel and air. the mechanical secondaries open when the throttle is pushed hard enough, even at idle. you can also use an air valve secondary carb as well, like the edelbrock, carter afb, or rochester quadrajet. on these type carbs the secondaries open when the throttle is pushed open, but the air valve opens when airflow overcomes spring or weight resistance.

 

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tylerrocks

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Oct 13, 2005

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Big Spring, TX

Dec 26, 2005

#7

• Dec 26, 2005

• #7

rbohm said:

1: heads, world products windsor jr, or afr 185's

2: intake, performer rpm

3: cam, xe262hr comp cam

Click to expand...

Im no expert but do you NEED that good of a head to make 265-290? I will agree they will give you room to grow but I think the HP goal could be had for cheaper.

Tyler

 

65up2d8

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Dec 27, 2005

#8

• Dec 27, 2005

• #8

tylerrocks said:

Im no expert but do you NEED that good of a head to make 265-290? I will agree they will give you room to grow but I think the HP goal could be had for cheaper.

Tyler

Click to expand...

Agreed. The recommendations are overkill, IMO, but some excess is always a good thing so you have room to grow, right? With that being said, look for a set of used World heads or GT40's of one type or the other on Ebay, etc., if you have price limitations that prevent the use of the heads suggested. From what I understand, however, make sure you know about the header fitment issues if you go with GT40 P heads.

 

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streetdemon70

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Dec 27, 2005

#9

• Dec 27, 2005

• #9

since it is going to be a roller what do i need to tell people when i order my dizzy so i make sure it has the right gear on it.

 

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tylerrocks

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#10

• Dec 27, 2005

• #10

Steel gear.

Tyler

 

rbohm

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#11

• Dec 27, 2005

• #11

tylerrocks said:

Im no expert but do you NEED that good of a head to make 265-290? I will agree they will give you room to grow but I think the HP goal could be had for cheaper.

Tyler

Click to expand...

yes you can get ported stock heads that will allow the engine to make the same power, but then you have about the same money in stocks heads as you would the aftermarket heads, and the aftermarket heads have other advantages going for them like;

1: thicker castings

2: more efficient combustion chambers

3: better port design

4: less chance of cracking

the heads that i recommended are perfect for an engine that makes around 300hp if you leave the ports as cast, and do allow for more power in the future. remember that when you are building an engine that you want to most efficiency possible, and the most capability for the money.

 

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tylerrocks

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#12

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• #12

AFR 185 flow 277 @.600, they hit 200 cfm at .350 lift. According to http://allfordmustangs.com/Detailed/630.shtml 185' are only out flowed by Vic. Jr.,TFS R, Canfield, and Victors. I think your suggested H/C/I combo would produce well over the 1 hp per cu. desired.

The Jan 2006 issue of mustangs and fords has an artical about a roller 289 making 301 hp using stock heads with a little money in them.

AFRs cost $1300

Tyler

 

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streetdemon70

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Dec 28, 2005

#13

• Dec 28, 2005

• #13

thanks for all the info guys. I have heard it is hard to get long tubes to fit on a 70 is this true?

 

Edbert

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Dec 28, 2005

#14

• Dec 28, 2005

• #14

Long tubes should not be a problem at all. If you want to spend over $1K on aftermarket heads (and have the room to grow later) consider the AFR-165s. I think they are closer match for your power levels. You can also buy GT40 aluminum heads for very little money since so many guys are replacing them, with the right pistons they work quite well and have the benefits of lighter weight and less detonation.

 

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steel1212

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Dec 28, 2005

#15

• Dec 28, 2005

• #15

Yeah, if you want to go aftermarket I think the 165s would be a good choice over the 185s. Then again if you could have your stockers worked for around 500 you could have higher compression as well and still get to your goals cheaper.

 

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streetdemon70

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Dec 28, 2005

#16

• Dec 28, 2005

• #16

ok thanks everyone, would there be room to grow with the 165's later on if i decided i wanted more power

 

Edbert

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#17

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I'd guess that the 165s would support 330-350 fwhp in a reliable NA mill with 306 or less cubes.

 

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streetdemon70

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Dec 31, 2005

#18

• Dec 31, 2005

• #18

ok i think i have decided that i want to hit the 300hp mark when my car gets on the dyno. What if anything would yall change from what was originally said so i can hit 300.

 

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streetdemon70

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Jan 1, 2006

#19

• Jan 1, 2006

• #19

ttt

 

5

57fairlane

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Jan 1, 2006

#20

• Jan 1, 2006

• #20

If you are on a limited budget and only want 290ish, it sounds like a good time to learn how to port.

Pick up a set of E7s and go to town.

There is plenty of useful information on the web and stock gaskets are CHEAP.