Looking for engine
Thread Starter
Instructor
Joined: May 2018
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Melting Slicks
Joined: Feb 2017
Posts: 3,235
Likes: 1,232
From: PHX AZ
Wait what...'you cannot use it because it's a two bolt'????? Hornswoggle!
Sure you can! There is nothing wrong with a good 2 bolt up to 350 hp.....even more.
Just don't go nuts with the comp ratio. Have a good forged crank would be 'nice' but not necessary.
Good luck....
another internet 'myth' bites the dust!
Unkahal
Sure you can! There is nothing wrong with a good 2 bolt up to 350 hp.....even more.
Just don't go nuts with the comp ratio. Have a good forged crank would be 'nice' but not necessary.
Good luck....
another internet 'myth' bites the dust!
Unkahal
Melting Slicks
Joined: Dec 2009
Posts: 3,195
Likes: 632
From: Thunder Bay
Your bearings didn’t wear out because you have 2-bolt mains. If that’s what your mechanic told you, find a new mechanic. Thousands of small block Chevies have run hundreds of thousands of miles on 2-bolts. 300 hp does not require 4-bolt mains.
Melting Slicks
Joined: Feb 2017
Posts: 3,235
Likes: 1,232
From: PHX AZ
OMG....this must NOT be a screaming deal......only because it's a two bolt main! You can see the crank journals....they MUST be ruined because it's a two bolt main!
https://phoenix.craigslist.org/cph/p...901162663.html
https://phoenix.craigslist.org/cph/p...901162663.html
Old Pro Solo Guy
Joined: Dec 2017
Posts: 7,941
Likes: 4,301
From: Marlton NJ
Your crank bearings wore out for some other reason, but it had nothing to do with it being a 2 bolt main. More likely is the cam wore out, due to no zinc, and the particles took out the bearings. Check for rounded cam lobes, or loose rocker arms, and then you'll know. With today's almost no zinc oils, you'll want to build a roller cam motor (street version). Just so it'll last forever no matter what kind of oil you toss in it. And use the two bolt block. Four bolt blocks go for $500 around here, and the shipping to Norway would cost a lot too. You'd be money ahead to put that $800 towards a roller. Or find a later model 350 that already has a factory roller in it.
GM first began installing roller cams in some Chevrolet small-block, V8-equipped cars in 1987. But OE roller-cam installations in trucks didn't occur until 1995
GM first began installing roller cams in some Chevrolet small-block, V8-equipped cars in 1987. But OE roller-cam installations in trucks didn't occur until 1995
Last edited by leigh1322; Jun 3, 2019 at 07:35 PM.
Le Mans Master
Joined: Sep 2001
Posts: 7,739
Likes: 630
From: Unreconstructed, South Carolina
I've told you what's wrong with that overpriced BP piece ... now here's a practical solution:
Just about the best deal there is, certainly THE best I know of.
Brand New GM L31 Vortec 350 ... 255 HP ... Vortec heads, Roller Cam & Lifters. Well Under $2000 All Brand New. Add a little bigger cam, a Vortec intake manifold, a melonized distributor gear, electric fuel pump etc... all WELL UNDER $1000 and it'd easily make 375-400HP Robust, Durable RELIABLY.
https://www.ebay.com/itm/GM-OEM-NEW-...frcectupt=true
FWIW, I knew a Norwegian biker who lived in Charleston SC ... BIG cat who rode an equally BIG Kannon with Vortec V8 power.
Just about the best deal there is, certainly THE best I know of.
Brand New GM L31 Vortec 350 ... 255 HP ... Vortec heads, Roller Cam & Lifters. Well Under $2000 All Brand New. Add a little bigger cam, a Vortec intake manifold, a melonized distributor gear, electric fuel pump etc... all WELL UNDER $1000 and it'd easily make 375-400HP Robust, Durable RELIABLY.
https://www.ebay.com/itm/GM-OEM-NEW-...frcectupt=true
FWIW, I knew a Norwegian biker who lived in Charleston SC ... BIG cat who rode an equally BIG Kannon with Vortec V8 power.
Thread Starter
Instructor
Joined: May 2018
Posts: 100
Likes: 4
Wait what...'you cannot use it because it's a two bolt'????? Hornswoggle!
Sure you can! There is nothing wrong with a good 2 bolt up to 350 hp.....even more.
Just don't go nuts with the comp ratio. Have a good forged crank would be 'nice' but not necessary.
Good luck....
another internet 'myth' bites the dust!
Unkahal
Sure you can! There is nothing wrong with a good 2 bolt up to 350 hp.....even more.
Just don't go nuts with the comp ratio. Have a good forged crank would be 'nice' but not necessary.
Good luck....
another internet 'myth' bites the dust!
Unkahal
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Le Mans Master
Joined: Sep 2001
Posts: 7,739
Likes: 630
From: Unreconstructed, South Carolina
For most street & some racers, cast crank is Not a limiting factor.
e.g. Overwhelming majority of GM LS motors making up to ~500 hp sold new with cast cranks ... including LS3.
e.g. Overwhelming majority of GM LS motors making up to ~500 hp sold new with cast cranks ... including LS3.
Thread Starter
Instructor
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Drifting
Joined: Jun 2012
Posts: 1,990
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From: Port St. Lucie Fl
So the Blueprint Engine I found is good enough? https://www.summitracing.com/parts/mll-bp35511ctc1
Thread Starter
Instructor
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theres a debate going on in another thread about the way engines are rated. The 310hp engine when put in the car will not be 310rwhp on a dyno, if you want 310 rwhp you need to look at engines rated at 400. Go here and read before ordering. https://www.corvetteforum.com/forums...rear-axle.html
and i don’t want to brake the bank either
Drifting
Joined: Jun 2012
Posts: 1,990
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From: Port St. Lucie Fl
Thread Starter
Instructor
Joined: May 2018
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If you are set on blue print engines why not this one https://blueprintengines.com/product...lock-bp3503ct1 its more power than the ones you listed, it has all the features we are telling you to get and its cheaper. You will need a new intake manifold but your still better off.
Thread Starter
Instructor
Joined: May 2018
Posts: 100
Likes: 4
If you are set on blue print engines why not this one https://blueprintengines.com/product...lock-bp3503ct1 its more power than the ones you listed, it has all the features we are telling you to get and its cheaper. You will need a new intake manifold but your still better off.
Le Mans Master
Joined: Sep 2001
Posts: 7,739
Likes: 630
From: Unreconstructed, South Carolina
So the Blueprint Engine I found is good enough? https://www.summitracing.com/parts/mll-bp35511ctc1
... but ... because it's overpriced with heavily-worn bores & crap cam & crap heads. You can do much better with your $3300.
JMO ... A stock OE L31 Vortec will probably perform as well as (maybe even outperform) a stock OE L48/ZQ3 '69 300hp Base C3 motor.
FACT ... OE L31 is rated 255hp while loaded-up with all Accessories, Single Exhaust and Catalytic Converter ...
... quite different rating criteria-method than '69 vettes.
Yes, I understand '69 L48/ZQ3 Base 350 has 10.25:1 SCR while L31 350 has 9.4:1 SCR.
I'll also second the above gent's opinion that ... IF your shop/mechanic tells you bearings are bad, only because motor has 2 bolt mains ... run & find better help.
Thread Starter
Instructor
Joined: May 2018
Posts: 100
Likes: 4
JMO ... No it's Not good enough ... but Not because it has a cast crank (in itself, cast is good enough) ... but ... for the second time ...
... but ... because it's overpriced with heavily-worn bores & crap cam & crap heads. You can do much better with your $3300.
JMO ... A stock OE L31 Vortec will probably perform as well as (maybe even outperform) a stock OE L48/ZQ3 '69 300hp Base C3 motor.
FACT ... OE L31 is rated 255hp while loaded-up with all Accessories, Single Exhaust and Catalytic Converter ...
... quite different rating criteria-method than '69 vettes.
Yes, I understand '69 L48/ZQ3 Base 350 has 10.25:1 SCR while L31 350 has 9.4:1 SCR.
I'll also second the above gent's opinion that ... IF your shop/mechanic tells you bearings are bad, only because motor has 2 bolt mains ... run & find better help.
... but ... because it's overpriced with heavily-worn bores & crap cam & crap heads. You can do much better with your $3300.
JMO ... A stock OE L31 Vortec will probably perform as well as (maybe even outperform) a stock OE L48/ZQ3 '69 300hp Base C3 motor.
FACT ... OE L31 is rated 255hp while loaded-up with all Accessories, Single Exhaust and Catalytic Converter ...
... quite different rating criteria-method than '69 vettes.
Yes, I understand '69 L48/ZQ3 Base 350 has 10.25:1 SCR while L31 350 has 9.4:1 SCR.
I'll also second the above gent's opinion that ... IF your shop/mechanic tells you bearings are bad, only because motor has 2 bolt mains ... run & find better help.
Le Mans Master
Joined: Sep 2001
Posts: 7,739
Likes: 630
From: Unreconstructed, South Carolina
He is probably the best mechanic in my area. The 2 bolt i have is bad and has to be fixed by someone. I also need new pistons etc. In Norway this will cost the same as buying a new engine so that is what i will do. Sorry to tell you guys, but a 4 bolt is the only option for me, and Blueprint is known for thier quality. I think i will go for the engine i found if you cant find a dressed 4 bolt that is better
this is better https://www.summitracing.com/parts/nal-19367082
I'm done.