H.P. numbers for 75-78 302 with bolt ons?

7

77M2C2

New Member

Nov 16, 2004

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Wantagh Long Island New York

Nov 25, 2004

#1

• Nov 25, 2004

• #1

From what I,ve read the base H.P. numbers for the stock smogged engine were about 140 or so ponies.

So... I guess what I,m asking is or what are the ballpark numbers after installing bolt on pcs such as 4v carb,headers,ignition etc. without any internal work. I,m guessing that someone has dyno'ed with these mods.

Thanks,
Dale

 

L

LXXVICOBRA

Founding Member

Jul 10, 1999

506

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Central NY State

Nov 25, 2004

#2

• Nov 25, 2004

• #2

Dale,

I can't give you any figures, but can assure you that the mods you suggest will give you a noticable performance increase. You might also want to consider a mild cam change to take best advantage of the other mods however, and perhaps switch to a slightly better rear gear ratio in the neighborhood of 3.25 or 3.40:1.
You really don't need any more mods than these, to have a very drivable and enjoyable street car.

 

C

COBRAIIW

New Member

Apr 26, 2003

562

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CT

Nov 25, 2004

#3

• Nov 25, 2004

• #3

Also,lose the smog stuff and don't go crazy with big CFM carbs.
600cfm is about your best limit.
headers and aftermarket manifolds help.
dual exhaust,lose the cats.
14" tires or better
MSD ignition
these are good to start with and will give noticable improvement.

 

L

LXXVICOBRA

Founding Member

Jul 10, 1999

506

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Central NY State

Nov 25, 2004

#4

• Nov 25, 2004

• #4

Agreed...I just assumed that the smog stuff was already long gone. Yes, no more than 600cfm carb on that otherwise stock or lightly modified engine.

 

7

77sleeper

GO BUCS!

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Oct 11, 1999

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Napalm, AZ

Nov 25, 2004

#5

• Nov 25, 2004

• #5

you are gonna have a very hard time getting over 200 with the stock cam/heads

 

Blue Thunder

15 Year Member

Mar 20, 2004

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68

Upstate New York.

Nov 26, 2004

#6

• Nov 26, 2004

• #6

The stock cam really sucks.

 

Wart

I'm Mad as HELL and I'M not Gonna Take it ANYMORE!

Founding Member

Sep 1, 1998

408

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58

NE Ohio

Nov 26, 2004

#7

• Nov 26, 2004

• #7

Blue Thunder said:

The stock cam really sucks.

Click to expand...

You mean there are still stock cams in engines?

I thought they would have lost their lobes and burnt up sometime in the '80s.

Hell, I wasn't sure my '78 even had lobes .... in '78.

 

7

77sleeper

GO BUCS!

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Oct 11, 1999

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Napalm, AZ

Nov 26, 2004

#8

• Nov 26, 2004

• #8

Wart said:

You mean there are still stock cams in engines?

I thought they would have lost their lobes and burnt up sometime in the '80s.

Hell, I wasn't sure my '78 even had lobes .... in '78.

Click to expand...

yup, mine still had the plastic cam gear on it

haha, AFR 165s and an ED curtis cam will give you 200-250% stock power

 

T

Testament

New Member

Nov 14, 2003

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Regina

Nov 27, 2004

#9

• Nov 27, 2004

• #9

Ok..... can 80's 5.0 HO Heads(HeartShaped combustion chambers) be made to flow well? I have a set I might rebuild..Probably only put $1000 bucks into them.

 

jeffnoel

Founding Member

Aug 31, 2002

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Clovis, CA

Nov 27, 2004

#10

• Nov 27, 2004

• #10

Testament said:

Ok..... can 80's 5.0 HO Heads(HeartShaped combustion chambers) be made to flow well? I have a set I might rebuild..Probably only put $1000 bucks into them.

Click to expand...

For less than $1000 bucks you can get a set of brand new aluminum heads that will outperform E7 with no work at all. Just bolt-on and go.

 

C

COBRAIIW

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Apr 26, 2003

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CT

Nov 28, 2004

#11

• Nov 28, 2004

• #11

Aluminum heads!

 

7

77M2C2

New Member

Nov 16, 2004

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Wantagh Long Island New York

Nov 28, 2004

#12

• Nov 28, 2004

• #12

Thanks for the replies. The reason I asked about the stock H.P. #'s vs. my mod list is that the car has these mods already bolted on minus the smog gear and does have ALOT of cam, maybe to much for a street car and was just trying to get an idea of what kind of a punch she'll pack...or shove. Wasn't going to do much with this car this winter but I think thats subject to change. Took the car for a quick (illegal) blast and attracted alot of attention with this car. There's a lot of people that don't know or remember.

Dale

 

jeffnoel

Founding Member

Aug 31, 2002

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Clovis, CA

Nov 28, 2004

#13

• Nov 28, 2004

• #13

77M2C2 said:

Took the car for a quick (illegal) blast and attracted alot of attention with this car. There's a lot of people that don't know or remember.

Dale

Click to expand...

I did the same Friday and spun alot of heads, I'm one of about 3-4 that I've seen in town.

 

Blue Thunder

15 Year Member

Mar 20, 2004

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Upstate New York.

Nov 30, 2004

#14

• Nov 30, 2004

• #14

A stock camshaft, a steel wheel and a piece of plate glass could probably make a cool end-table.

 

Cobra_TT

New Member

Nov 24, 2004

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Dec 1, 2004

#15

• Dec 1, 2004

• #15

Here is what I would do
-600 CFM 4bbl
-Cam from a late 80' HO Stang
-Heads from the same above engine
-Loose the smog junk
-Low resistance spiral core plug wires no lower than 600 Ohams per foot
-Buy all new OEM Ignition parts (MSD does nothing for performance)
-Put taller gears out back
-Maybe a T5 out of a late 80's Ho Stang also

Just my $0.02

 

Blue Thunder

15 Year Member

Mar 20, 2004

1,003

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68

Upstate New York.

Dec 1, 2004

#16

• Dec 1, 2004

• #16

Cobra_TT said:

Here is what I would do
-600 CFM 4bbl
-Cam from a late 80' HO Stang
-Heads from the same above engine
-Loose the smog junk
-Low resistance spiral core plug wires no lower than 600 Ohams per foot
-Buy all new OEM Ignition parts (MSD does nothing for performance)
-Put taller gears out back
-Maybe a T5 out of a late 80's Ho Stang also

Just my $0.02

Click to expand...

The problem with swapping the late 80s HO roller-lifter camshaft into the older block is that the lifter bores arent high enough on the older motors, since they werent designed for use with roller lifters. I guess somebody might make a kit to hold and stabilize the roller lifters in the old blocks, not sure about it, though.
But all that aside, the steel cam + roller lifters + whatever hardware would be needed to make it work is pretty costly.
I would instead opt to have the heads machined for use with screw-in rocker studs and adjustable rockers, and then install a solid-lifter cam in that old motor. That'll wake its ass up.

 

Cobra_TT

New Member

Nov 24, 2004

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Dec 1, 2004

#17

• Dec 1, 2004

• #17

I totaly forgot about the roller cams in those engines, I personally would just bua an engine from a late 80's stang and put a 4bbl on it

 

7

77M2C2

New Member

Nov 16, 2004

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Wantagh Long Island New York

Dec 1, 2004

#18

• Dec 1, 2004

• #18

Twin62-1 Hybrid turbos...holy cr@p!

Dale

 

welder4956

20+ Year Stangneter

Nov 28, 2003

230

95

38

Birmingham, AL

Dec 1, 2004

#19

• Dec 1, 2004

• #19

Cobra_TT said:

1978 Mustang Cobra
-Ported heads
-Port Matched Intake and Exhaust
-351 Block with 302 Crank
-Multiport Fuely
-Twin 62-1 Hybrid Turbos
-3" Exhaust w/ Xpipe
-Midvalley Semi-Clutchless 6sp. w/External overdrive unit (12 Gears in all)
-4 link rear end out of a Crown Victoria w/3.55's
-Custom Widebody kit for rear
-5 Lug Conversion (For the front)
-16" x 6" Daytona Rims Front
-16" x 11" Daytona Rims Rear
-820 WRHP
-About 900 Foot Pounds of Pavement Pounding Torque

Click to expand...

Got pics? I'd love to see what this 820 RWHP Mustang II looks like!

 

Cobra_TT

New Member

Nov 24, 2004

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0

Dec 1, 2004

#20

• Dec 1, 2004

• #20

The entire car is siting in my garage in pieces right now but next summer when I start puting it to geather I will start a new thred just for the progress.

Dont worry guys they are coming