best 351c build up for street

L

lewis_dd

New Member

Dec 6, 2001

16

0

0

Feb 15, 2006

#1

• Feb 15, 2006

• #1

i have a '73 Mach 1 with the 351c 4v open chamber heads. I want to get some more power and speed from it my signiture shows what i have now. I have full length headers not installed tet, and could either put flat top pistons or put closed chamber heads a cam, etc.

any suggestions?

Thanks

Darren

 

DarkoStoj

Founding Member

Sep 4, 2002

929

13

39

Detroit

Feb 15, 2006

#2

• Feb 15, 2006

• #2

i have a solid roller, 4v heads, long tube headers with 3" exaust, edelbrock dual plane intake, and edelbrock 600cfm carb.

I bought it like this, it doesn't pull hard until 4500rpm, and I think that it would rock with a different intake/carb

 

rbohm

Founding Member

Apr 12, 2002

6,698

550

204

tucson,az

Feb 16, 2006

#3

• Feb 16, 2006

• #3

first decide what rpm range you are going to run this engine about 85% of the time. a street/strip motor is different than a race motor, is different than a daily driver motor.

 

milner351

Founding Member

Jun 12, 2002

92

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0

The Motor City

Feb 16, 2006

#4

• Feb 16, 2006

• #4

Generally for the street, 2v heads are better, and much more responsive in the lower rpm range...

 

D

D.Hearne

New Member

Sep 29, 2000

11,730

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south louisiana

Feb 16, 2006

#5

• Feb 16, 2006

• #5

Swap the factory cam for something better like a Comp Cams 268H. That would boost the dynamic compression to help the open chambered heads and should improve the bottom end. I'm not a fan of Edelbrock carbs, so I'd go with a bigger Holley like a 670 Street Avenger or list - 80783-- 650 cfm vac. secondary carb. Summit's cam part # SUM-K5200 would also work well. I used one in a stock 400M and it really woke it up. Same open chambered heads but with 2 bbl ports as your 351C.

 

3

351carlo

New Member

Mar 9, 2004

267

0

0

Philadelphia

Feb 20, 2006

#6

• Feb 20, 2006

• #6

Like D.Hearne said, I would get a camshaft.

I had good luck with CompCams 270H, a single pattern Magnum cam. I'm actually selling it with lifters for 100.

http://forums.stangnet.com/showthread.php?t=617202

 

1320stang

Founding Member

Nov 13, 1998

4,329

23

89

Edmond, Oklahoma

Feb 20, 2006

#7

• Feb 20, 2006

• #7

You could also put port plates in the exhaust side as well.

 

D

Dan H

New Member

Feb 21, 2006

10

0

0

Seattle

Feb 21, 2006

#8

• Feb 21, 2006

• #8

For the street, get some Aussie heads (Closed Chamber, Small Ports) and a nice dual plane intake, a good cam, and good well tuned carb.

The closed chambers have much less trouble with detonation, and the smaller ports will have good TQ.