306 emission legal?

Purple95 · Mar 12, 2006

Hello all I'm new to Stangnet but have been reading the forums for quite some time now. I recently puchased TFS Twisted Wedge heads, performer intake, and e303 cam for my a HCI combo.
I realized that I spent alot of money and dont want it to go waste so I don't want to reuse the block from my car because its a 95 stock block with 165k miles on it. I was looking into purchasing a 302 short block with less mileage. I would also like to know if a 306 would be emission legal in California. Any help would be appreciated and if the 306 is not emission any help if finding an affordable short block would be much appreciated. Thanks in advance for your help.

blksn955.o · Mar 12, 2006

whats going to make it smog legal as far as a sniffer is the cam, the heads, intake "should" have a smog/carb sticker or be smog legal.

A good fresh or fresher than your stocker shortblock will prob. be better than your stock as the rings will have better oil control.

final5-0 · Mar 12, 2006

From a visual perspective, they would not know the difference if you went all the way to a 347.

You will have to have everything in place and in working order but as long as you got all that, a 306 should give you no probs.

My combo has passed with flying colors the past three years and the emissions guys tell me we are right behind CA as far as strict emissions testing goes.

Grady

SeventyMach1 · Mar 12, 2006

Yeah, displacement really has nothing to do with emissions (or has no effect). Your H/C/I is the factor for the most part.

Just because your stock block has high mileage DOES NOT mean it isn't worth using. Were you wanting to just get another stock block and have it bored to make a 306? Why not use the block you have?

IMO, there is no point in switching out the stock block unless you're upgrading it to a better type of block(to withstand more power). Depending on your goal, you could just have your stock one bored & cleaned up. Then throw the "over" pistons in there with new rings, etc.

The Red Monster · Mar 12, 2006

it should pass!!!!!!!!!!!!!!!

mo_dingo · Mar 12, 2006

SeventyMach1 said:
Yeah, displacement really has nothing to do with emissions (or has no effect). Your H/C/I is the factor for the most part.

Just because your stock block has high mileage DOES NOT mean it isn't worth using. Were you wanting to just get another stock block and have it bored to make a 306? Why not use the block you have?

IMO, there is no point in switching out the stock block unless you're upgrading it to a better type of block(to withstand more power). Depending on your goal, you could just have your stock one bored & cleaned up. Then throw the "over" pistons in there with new rings, etc.

Displacement does have a negative effect on emissions. The more displacement, the more exhaust output, the more HC and NOX emissions output. So going from a 302 to a 347 will increase your emissions output. But 302->306 is negligible IMO>

If you disassemble the stock block, have it cleaned and inspected, bore the cylinders out to your 306 and slap some fresh forged pistons & new seals/bearings, you will be set. That is what I would do.

But if you have grandiose plans for your car, now might be the time to upgrade the block and go with a complete forged setup.
Scott

SeventyMach1 · Mar 13, 2006

Good point Scott .... but I was more so trying to say that the H/C/I are the most important factors.

Chythar · Mar 13, 2006

SeventyMach1 said:
Good point Scott .... but I was more so trying to say that the H/C/I are the most important factors.

Very true. You can buy all 100% smog legal parts, and STILL fail a sniffer test. the parts are marked as smog legal IF they don't adversely affect emissions on a STOCK engine. So, if you have several smog legal parts they can all add just enough emissions to make you fail. That being said, it will all come down to the tune. Almost EVERYTHING comes down to the tune.

You can get a 347 smog legal stroker in California, from Coast High Performance:

http://www.coasthigh.com/Assemblies/Ford/ford_347.htm

See the 347-e Street Fighter. Catch is, you have to use their cam and it only comes pre-assembled as a short block.

306 emission legal?

Purple95

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blksn955.o

final5-0

Mustang Master

SeventyMach1

Keep it lubed .... keep it straight .... and keep

The Red Monster

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mo_dingo

SeventyMach1

Keep it lubed .... keep it straight .... and keep

Chythar

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306 emission legal?

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Mustang Master

Keep it lubed .... keep it straight .... and keep

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Keep it lubed .... keep it straight .... and keep

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