How much HP from 355
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Registered User
Joined: Jul 2003
Posts: 478
From: Hodgenville, Kentucky
How much HP from 355
I've noticed a few people with 355's. Approximately how much hp and torque would this net over a 350 (same cam, etc.)? Also, to get to 355 you bore the block .030 over, and keep the same stroke right? So if this is true, all I would need to do if bore the block out, and install bigger pistons?
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Joined: Apr 2003
Posts: 1,591
From: PA
The 5 ci isn't for power, it'll gain you 5 maybe. If you have a good bottem end built though that can handle more from the top obviously your going to gain more than 5. The only reason that they didnt' build another 350 is because they had to remove material on the rebuild to get a good cylinder wall surface. Now a 377, 383, or 396 will give you some more tq, and since that is related to the hp that will go up to. It's all in matching the components though, not just the displacement.
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Joined: Nov 2000
Posts: 2,734
From: Kansas City suburb of
I plugged in all my info with cam specs and head flow #s and desktop dyno says my 355 will make 509 ft/lbs and 501 horse.
I cant see a reason to build a stroker with those numbers.
Of course its just a computer program but if it even comes close its good enough for me.
I cant see a reason to build a stroker with those numbers.
Of course its just a computer program but if it even comes close its good enough for me.
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Joined: Sep 2002
Posts: 1,158
From: Chicagoland Area
bore = Horsepower
Stroke = Torque
Either way u go, when u add either of those factors, u are gaining some power. A 355 for most ppl is treated as a rebuild. Many ppl who go the less expensive route simply replace their pistons and add new rings, as well as some crank and rod balancing. This often isn't done to gain power, but ratherto allow the bottom end to achieve higher RPM, or handle a shot of N20. THAT is where the power lies in a 355, not in the actual displacement itself.
A more effective (and expensive) 355 from a power standpoint would be a high revving monster (capable of obtaining 7000+ RPMs) and going with a cam that boasts power in the high RPMs. With the right combination of rotating assembly parts, the motor would also be able to use a huge shot of N20. A well balanced and blueprinted motor will give u instant RPMs. These factors are what make 355s capable of big power.
Stroke = Torque
Either way u go, when u add either of those factors, u are gaining some power. A 355 for most ppl is treated as a rebuild. Many ppl who go the less expensive route simply replace their pistons and add new rings, as well as some crank and rod balancing. This often isn't done to gain power, but ratherto allow the bottom end to achieve higher RPM, or handle a shot of N20. THAT is where the power lies in a 355, not in the actual displacement itself.
A more effective (and expensive) 355 from a power standpoint would be a high revving monster (capable of obtaining 7000+ RPMs) and going with a cam that boasts power in the high RPMs. With the right combination of rotating assembly parts, the motor would also be able to use a huge shot of N20. A well balanced and blueprinted motor will give u instant RPMs. These factors are what make 355s capable of big power.
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