i have a question for u out there i trying to plan out a rebuild on a olds 307 yes a that block because i want to keep the stock as close as possible i want to give this motor a little more kick in my question when i rebuild it i want to know is a will a set of 327 chevy rods work on this motor i would like to use these on it please let me would benefits i would have on this or drawbacks i would have with this thanks!!!!!!!
connecting rods
- Thread starter mrotownredneck
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i heard of people putting 454 chevy rods in 455 olds by shorting the rods up to work that why i am asking these 327 chevy rods
I have seen people use Chevy rods in Oldsmobiles before but it is a bunch of work. The only reason they used them is because the price worked out to be about the same doing all the machine work than finding a company making aftermarket Oldsmobile rods for HIGH HP applications. I have not seen them used in a 307. Nor were they off the shelf rods. How are you adding power to it? Rods have nothing to do with giving it more power or did you mean you just wanted some different hopped up parts in it?
i have a few ideas for this motor but i'm not sure if they will work thinking about boring it at about .030 putting a different cam and edalbrock perfomer intake with holley double pumper the only reason i want to build this 307 is to keep things mostly stock with this car and also at the same time i want to give this motor some kick at the same time!
Well look elsewhere then the rotating assembly. Not gonna gain any power out of changing the rods. If it does not need bored out then don't bore it. The 5ci you earn isn't really going to do anything. A mild cam, aftermarket intake and some headers will net you your best gains out of a 307.
You can use the 6inch 327 rods either with chebby pistons or olds pistons, but the small end has to be bored to fit the stock (.980) Olds pin diameter.
and then you have to grind your crank to chebby 2.100 dimensions, and you will have to ask the shop for a 0.25-under grind. And you must all so side grind the rod journal for the desired rod side clearance, behause most after market chebby rods are.940_inch wide. Then you have stroked engine, fex 350 to 378cui..
and then you have to grind your crank to chebby 2.100 dimensions, and you will have to ask the shop for a 0.25-under grind. And you must all so side grind the rod journal for the desired rod side clearance, behause most after market chebby rods are.940_inch wide. Then you have stroked engine, fex 350 to 378cui..
GMNorway said:
this doesn't give you a stroked engine, you simply have the rod journals ground down to fit a chevy rod. you'd have to have the crank offset ground to get a stroker.
you can drop in a 350 Olds motor and they look the exact same externally has your 307 plus all the factory brackets would bolt up to the 307
I agree. That's a lot of work just to essentially keep an engine block becuase it's a 307.
A 350 Olds would drop in the same spot, use the same high performance parts/accessories and would look just like a 307.
As for the reason to run a Chevy (2.100) or Honda (1.880?) rod in a SBO is to gain more stroke by offset grinding the crank. It also helps to reduce your bearing speed which helps with longevity when reving higher in the rpm range. The Chevy and Honda rods are more readily available as an over the counter part where as your only other option would be to have a custom set of rods made. $$$$
Also, as mentioned this is also a popular modification on the BBO engines but there are more companies that make an off the shelf rod for this situation on a BBO than there are for a SBO from what I've seen.
With my 455 I had a steel 425 crank (which has a rod journal of 2.500") offset ground to a BBC journal of 2.200" that brought my stroke from 3.975" back to the stock 455's 4.250" stroke. In my case I have a set of custom aluminum rods @ 6.990" that were made specifically for this application but you can also use BBC rods with a little work as well. The other benefit of this on the 455 is that your increasing the rod length from the stock 6.735" to roughly 7.000" which helps with the rod-to-stroke ratio.
A 350 Olds would drop in the same spot, use the same high performance parts/accessories and would look just like a 307.
As for the reason to run a Chevy (2.100) or Honda (1.880?) rod in a SBO is to gain more stroke by offset grinding the crank. It also helps to reduce your bearing speed which helps with longevity when reving higher in the rpm range. The Chevy and Honda rods are more readily available as an over the counter part where as your only other option would be to have a custom set of rods made. $$$$
Also, as mentioned this is also a popular modification on the BBO engines but there are more companies that make an off the shelf rod for this situation on a BBO than there are for a SBO from what I've seen.
With my 455 I had a steel 425 crank (which has a rod journal of 2.500") offset ground to a BBC journal of 2.200" that brought my stroke from 3.975" back to the stock 455's 4.250" stroke. In my case I have a set of custom aluminum rods @ 6.990" that were made specifically for this application but you can also use BBC rods with a little work as well. The other benefit of this on the 455 is that your increasing the rod length from the stock 6.735" to roughly 7.000" which helps with the rod-to-stroke ratio.
i don't see what differnet is but i do agree with you on dropping a olds 350 in but i want this car to be that stock sleeper type and plus i am working on limited budget but i want to get a much kick out of this motor as i can i already got screwed on the first motor i want to put in whitch was 68 327 chevy and the guy i bought it from didn't give me the end caps for it so more less it was a very spendy paper weight!FE3X CLONE said:
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