Need CAM suggestion for an old 305.....
#1
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Well, due to financial constraints, it looks like my 350 swap will have to wait until at least the end of summer. In the meanwhile, I want to get a little more HP out of my old 305. Does anybody have any suggestion as to which brand/duration/lift I should go with? The engine has about 120K miles on it but still runs strong, but Im worried that old valve springs and a new cam might cause me to float a valve. Is this a valid concern? Im only looking to cam the car, not pull the heads or replace pistons. Thanks.
#2
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I've got some news for you. You don't have to pull the heads to rplace valve springs, and running a new cam with old springs is a bad idea, anyway. Do you have a decent capacity air compressor that can easilly maintain 100 psi with a small leakdown at the end of the hose, and keep it up there for at least an hour?
#3
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Replacing springs while doing a cam won't add more than 2 hours to the job, inexperienced installer even...
Is it a TBI or TPI 305? Either way, a cam swap isn't going to do much to give you more umph, while the peanut cam found in 305 TPI's suck, it's really the heads & TPI that are also holding the motor back. As for TBI...ugh.
You should just be patient and wait until your 350 is ready for installation.
Is it a TBI or TPI 305? Either way, a cam swap isn't going to do much to give you more umph, while the peanut cam found in 305 TPI's suck, it's really the heads & TPI that are also holding the motor back. As for TBI...ugh.
You should just be patient and wait until your 350 is ready for installation.
#4
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As far as the air compressor thing, the most I access to is a Craftsman 5 HP. I believe it shoots 90-100.
However, I dont want to undertake this project if Im not going to make a big difference. The car was originally crossfire. Its now Carbed ( 'Brock 600) 'Brock intake, cheap headers and dual exhaust. So you guys really think that a cam will make little difference?
However, I dont want to undertake this project if Im not going to make a big difference. The car was originally crossfire. Its now Carbed ( 'Brock 600) 'Brock intake, cheap headers and dual exhaust. So you guys really think that a cam will make little difference?
#6
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this is a tried and true fairly reasonable aftermarket cam for a 305. all it needs to make good power is a single plane intake and headers. Sick
Part Number - CS1062R
Brand - Speed Pro
Power Range - 2200-5700
Idle Quality - Fair
Valve Lift Int/Exh - .468 .480
Duration Adv. Int/Exh - 304° 287°
Duration @.050 Int/Exh - 220° 231°
Lobe Centerline - 110°
Part Number - CS1062R
Brand - Speed Pro
Power Range - 2200-5700
Idle Quality - Fair
Valve Lift Int/Exh - .468 .480
Duration Adv. Int/Exh - 304° 287°
Duration @.050 Int/Exh - 220° 231°
Lobe Centerline - 110°
#7
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Im running headers, but Im embarassed to ask, what is a single plane intake and how does it work differently than a dual? I have an old Edlebrock performer, see image....
http://www.rpmcat.com/images/2101-E11.jpg
This is exactly what I have.
I believe Im running a dual plane? Even with my current cam, should I go to a single plane?
Thanks Sick....
http://www.rpmcat.com/images/2101-E11.jpg
This is exactly what I have.
I believe Im running a dual plane? Even with my current cam, should I go to a single plane?
Thanks Sick....
#10
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The cam suggested by Sick is a bit stout for a stock 305. I'd go with something in the Comp Cams 260 or 252 range. It'll give You a much better low end without sacrificing mid range with Your stock type intake manifold. No offense Sick.