Small Block & Big Block Chevy Specific Mouse & Rat Motor Discussion & Conversions

Stroked 305

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Old Dec 9, 2009 | 11:14 PM
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Default Stroked 305

Is there a way you can stroke a 305 up to a 327 ?
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Old Dec 9, 2009 | 11:43 PM
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Just for reference.

Chevy 305 -- 3.736 bore and 3.48 stroke

Chevy 327 -- 4.00 bore and 3.25 stroke

I don't know if its safe to bore a 305 to a 4 inch bore. Maybe someone will chime in. I would guess your better off getting a 350 block.
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Old Dec 10, 2009 | 12:17 AM
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Originally Posted by chevy86irocz
Is there a way you can stroke a 305 up to a 327 ?
Nope, but you can go further. This is the only kit i know of:

https://shop.enginekits.com/osb/itemdetails.cfm?ID=341

335 cubic inches to make your boat anchor get out of ts own way.
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Old Dec 10, 2009 | 11:28 AM
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Right now the car is stock tpi, will be I still be able to run the tune port if I stroke it ? If so, what mods will I have to do ??
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Old Dec 10, 2009 | 01:12 PM
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throw it out and buy a 350.
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Old Dec 10, 2009 | 01:32 PM
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personally i'd put a small cam in that thing and convert over to a megasquirt. or if you do get that kit you can throw everything but the pistons in a 350 down the road. you're gonna need to at least get it so that you can tune the ECU in that thing, and the megasquirt is about as much money as prom burning software and being able to just flash the computer would be way easier than changing proms all the time
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Old Dec 10, 2009 | 02:07 PM
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Originally Posted by chevy86irocz
Is there a way you can stroke a 305 up to a 327 ?
throwin your $ away
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Old Dec 10, 2009 | 08:41 PM
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Originally Posted by NemeSS
throwin your $ away
That is a waste of money to do anything with a 305, I agree with the others to buy a 350 and if you want, build a stroker motor.
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Old Dec 12, 2009 | 08:47 PM
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i'm running into the same problem. The bore in the 305 just can't be punched enough. That's why i'm putting in a 350
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Old Dec 13, 2009 | 01:27 AM
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Originally Posted by chevy86irocz
Right now the car is stock tpi, will be I still be able to run the tune port if I stroke it ? If so, what mods will I have to do ??
To answer the question, yes, but you will need to tune the ECM.
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Old Dec 14, 2009 | 09:19 PM
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I have to agree, even if you kept the 350 as a stock 350 or 355, you'll be bigger and far cheaper than the 305.

Hell you can pick up an old 70s 4 bolt and 383 rotating assembly for ~2k and be rocking 60-80+cid over nearly the same money in a 305.

Plus did they make 305s with roller cams? More saved money there if you want to go roller and you get a roller era block.
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Old Dec 14, 2009 | 10:38 PM
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Originally Posted by RedGut86
I have to agree, even if you kept the 350 as a stock 350 or 355, you'll be bigger and far cheaper than the 305.

Hell you can pick up an old 70s 4 bolt and 383 rotating assembly for ~2k and be rocking 60-80+cid over nearly the same money in a 305.

Plus did they make 305s with roller cams? More saved money there if you want to go roller and you get a roller era block.
They did make 305 roller blocks.
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Old Dec 14, 2009 | 11:54 PM
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91-92 RS models that had tbi I beleive had them.
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Old Dec 15, 2009 | 08:47 AM
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Originally Posted by k5383
They did make 305 roller blocks.
1987-whenever they stopped making them were all roller.
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Old Dec 15, 2009 | 12:32 PM
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.

As mentioned, it's a terrible platform. I know guys do it all the time,
but it's just a waste of money to do anything with those pieces of junk.


.
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Old Dec 15, 2009 | 12:57 PM
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i see no good reason to do a stroked 305. even with class racing where a 305 is the limit, you can't use a larger stroke than stock so it's irrelevant for those situations.

if you're stuck on running a 305 for some strange reason, spend the money you'd spend on the more cubes and put it into the valvetrain and cylinder heads. even garbage can work well with a good set of cylinder heads.
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Old Dec 15, 2009 | 06:24 PM
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Unless you boost it, don't bother.
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Old Dec 15, 2009 | 07:00 PM
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even boosted, the extra cubes wouldn't help much, if any at all. too many issues with valve-shrouding...
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Old Dec 15, 2009 | 07:05 PM
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Originally Posted by thirdgenbum
even boosted, the extra cubes wouldn't help much, if any at all. too many issues with valve-shrouding...
That's not a big deal with boost. Mod motors seem to work just fine with bores that small, even the 2V engines.
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Old Dec 15, 2009 | 07:40 PM
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Originally Posted by ZONES89RS
335 cubic inches to make your boat anchor get out of ts own way.
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