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355 Possible HP

evolve991

evolve991

Resident Problem Child
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I was told about a 355 that's for sale ,literally in the yard where I'm working on my beast, but the owner is known for being hard to find and the car it's in is locked up so I can't peek at it. I'm told he bought it from Jegs or Summit and that it's basically stock,nothing radical.
Can anyone tell me the typical baseline HP of a 355?
 
Thread title is misleading, without a comma. :haha:
I was thinking, "Of course 355 horsepower is possible!" :doah:

Oh, but more to the point 355cui Nova's were 250hp.... Iirc.
 
First of all, being a "355" versus a standard 350 means absolutely nothing except that it had the standard 0.030" overbore during a rebuild to clean up the cylinder walls. It does not make it some high power engine. People don't, or at least should not, get a brand new block or one in good shape and bore it "30 over" solely for some power increase because of the increased displacement. The only thing you have done is limit the ability to rebuild the engine again. Theoretically if you had a built and very strong 350 c.i. engine that made 350 horsepower that is 1 hp per cubic inch, so boring it would net a whopping 5 hp. Sorry, I'll get off my soapbox now but I'm just tired of people saying "this engine is awesome because it's bored 30 over".......okay, great, the straight six in my grandpa's old grain truck is "bored 30 over" also....

Back to the OP, there is absolutely no way to estimate the power of the engine based off "355" being the only information on it. Could be 150 HP or could be 450 HP.
 
Thanks for the honesty Blazer it's exactly what I was looking for AND what I myself assumed too. You can bet anyone who is selling something is going to sweeten it all up with vague guarantees and fuzzy absolutes which is why I came here for input. Already researched at crate engine sites and also got all the inlaw input about the engine " oh no it doesnt have a race cam" "hell yeah it runs like a raped ape" (makes me wonder how much they're getting out of helping him sell it) but all I'm looking for is something strong enough to haul my tool-heavy Suburban nicely without keeping my foot in the carb OR changing everything to drop in a big block (although I'd love a 454) because I'm trying to balance my daily driver/contractor vehicle with my urge for warp drive/radical 4x4 ultimate attack vessel:rolleyes:

Guess I'll have to hit big at the casino for peace of mind and definite specs on what I'm buying :whistle:
 
82355 said:
I turned off sigs a long time ago. Uou should try it, makes the board MUCH cleaner and easier to read.

Martin
Click to expand...

Yeah but than we have posts asking questions that are clearly answered already in the sig so they do have their purposes
 
could be a standard GM perf parts 260hp engine, who knows without documentation, dyno or a teardown, you don't really know what you got????

The most powerful (advertised rating) Gen 1 350ci SBC was a 370hp LT-1
GM never made a 355, so it has been rebuilt by someone at some time.
 
I was told ,2nd hand, that it was a 355 "new/remanufactured" ordered either from Jegs or Summit and assumed there just MAY be a baseline standard they go by rather than a raffle and shell game for specs. I could see the wide range of maybes if it were a backyard Bubba-n-Cousins Coors Lite Weekend Blowout Special.
 
our big heavy trucks need tourqe over hp in a motor .

tourqe gets you movin hp keeps you movin .

we need bottom end grunt.

so unless you can see the specs sheet for this motor I would be carful .
 
it only takes 100hp to rock crawl though.
 
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