Lateral-g Forums - BluePrint Engines Pro Series Chevy LS 427

Lateral-g Forums (https://www.lateral-g.net/forums/index.php)

- Engine (https://www.lateral-g.net/forums/forumdisplay.php?f=37)

- - BluePrint Engines Pro Series Chevy LS 427 (https://www.lateral-g.net/forums/showthread.php?t=40586)

I saw the nose break off of a $3000 Winberg once, while working at a shop that built cup engines. I've also had my but handed to me by guys running scat cranks in their engines. I know this because the builder I used at that time used either Callies or Scat, depending on your budget, and built many engines in that class. I went Callies, of course, but I never saw a scat crank fail in the class I raced in, which was NASCAR asphalt late model. We turned around 7800 to 8000. I'd run a scat crank today to save some coin. The costs are out of control to keep it "American".

Quote:

Originally Posted by Sparks67 (Post 503504)

Oh, the engines were small block chevy, not LS engine that broke the cranks.

Read the post above yours, seems they can live in some pretty hard running high rpm motors too. Parts can and will fail, no matter the maker or quality/price. I would still not be afraid of their parts in a budget build. I have never used their parts in a max effort build, nor would I recommend them for that. But I also won't call them crap either. There are plenty of crappy Chinese parts out there for sure, but I don't put them in that same category.

Sparky I get it, you like good parts. I do too...:D

I personally know a respected race engine builder that has used Scat in LS motors that see occasional drag racing. One in the 600, the other in the 800 hp range. AFAIK they've held up just fine. They do require precision checking and machining.

Do they balance out ok? You bet.

Like others have said, would I use it in an extreme duty/max effort or road race build? I personally wouldn't.

Are they OK for a street motor? Sure!

Everyone has their opinion of parts. Vote with your wallet.

Just my .03

Can 'o worms warning: Aren't Compstars and Dragonslayers made in China and finished here? Those are in many, many builds over on LS1Tech.

Here is what my engine builder had on the dyno on Friday when we stopped to pick up my little POS.

This one may not have a Callies crank in it but he does use them and approves of them in other builds. Like Ron said most of their line is manufactured overseas but is finished here. And any engine builder worth his salt will check all of that on his own equipment anyway.

http://i236.photobucket.com/albums/f...ps7582c9f9.jpg

Oh, and this Pro Stock 650" only made 1015 ft lbs and 1430 hp.

Quote:

Originally Posted by Sparks67 (Post 503836)

Why does SCAT go to China instead of making in the USA? It is Greed! The question is how much that crank cost from China? Then they price it a little cheaper than GM part. I am from a former GM town (Kettering, Oh. You might have heard of DELCO), but I seen the affects of companies that have left the USA to get lower labor costs. My friends that worked at GM lost their jobs. So, maybe you guys might think about that next time you save a few bucks.

I don't want to get into a political discussion in your crankshaft thread -- but there's always two ways to see the same issue.... and GREED may have been behind the unions that drive labor costs so high that it forces companies to shop elsewhere. At some point the balance gets tipped and someone goes looking for a job.

I agree with you that greed and penny pinching by the RETAIL customer is also what drives these decisions. I personally will do almost anything and spend twice as much to buy USA or NON chinese products... But I know I'm fighting an losing battle there. So much stuff is made offshore anymore. That, to me, is where our government is a complete failure. In the old days we had DUTIES and TARIFFS on these products to keep the playing field even or at least somewhat competitive. Our government decided we didn't need this anymore and that's when the flood gates opened.

Remember Ross Perot -- when he said NAFTA is that giant sucking sound... He was 100% right on the money.

:topic:

Quote:

Originally Posted by Sparks67 (Post 502606)

You can also buy OEM crankshaft from GM. In this thread, it was an LS engine. Although, you have seemed to switched it to a big block. The OEM manufacturer tests their products more than aftermarket products. So, if you was building a LS3 427 then would you chose a Chinese Scat crank or OEM GM crankshaft.

Scat is cheaper, but only about $60. = Summit price is $797 for 4.0 Stroke crankshaft.

LS7 Crankshaft is $859.

http://www.newgmparts.com/partlocato...086&startrow=6

Blueprint doesn't list their stroke, but to get to a 427 with LS3. Most engine builders are using a 4.125 stroke crank, which cost is more. $1,037.
Jeff

Quote:

Originally Posted by Sparks67 (Post 503836)

Oh, you mean...Qinghai Jienshen Crankshaft Mfg, Co. (Scat's China Supplier). No webpage on the company, but it doesn't look like it is attached to any Chinese automotive company.

The other option is a GM crankshaft, which a friend of mine used on his 383 roller small block, it was fast street car/ but he took drag racing as well. He was machinist at local speed shop, but he said that he got the GM cranks cheaper than a Scat Crank. This was awhile ago, but I have compared prices in a previous post and it was only $60 difference for 4" stroke LS crank.

Why does SCAT go to China instead of making in the USA? It is Greed! The question is how much that crank cost from China? Then they price it a little cheaper than GM part. I am from a former GM town (Kettering, Oh. You might have heard of DELCO), but I seen the affects of companies that have left the USA to get lower labor costs. My friends that worked at GM lost their jobs. So, maybe you guys might think about that next time you save a few bucks.

Callie is hard to follow on where is made at. Anyway, I posted that in another post, but I heard that Japan Kobe is the foundry for compstar. Japan Kobe has foundries in China, but other parts of the world.

I heard the Dragonslayer cranks are made in the US, but again I am not 100% sure. I have Crower crankshaft and it is made in USA.

A good article on crankshafts http://www.enginebuildermag.com/Arti...rformance.aspx

Jeff :flag2:

Jeff your loyalty to American made products and furthering domestic employment is commendable. It is however a bit hard to follow your argument/logic on parts. This thread was about an LS3 427. You then bounced to a BBC, an LS7 and then a 383, all in the name of smashing foreign crankshaft products and purchasers.

The link and price comparison you posted is for a GM LS7 forged crank. This crank would require either machining down the snot to accomodate a wet sump pump or adding a GM dry sump ($$$). The LS7 is also balanced to Ti rods (retail, what $600 a piece?), which would also force you to add mallory to balance the crank adding more $$$.

So let's get back to an LS3427. Which GM crank, non-dry sump is forged?

I seriously don't know, never built one like that.

Quote:

Originally Posted by Sparks67 (Post 503950)

You have your facts a bit wrong. You might look a lobby group called Business Roundtable. It was the Business Roundtable that urged George Bush to initiate free trade with Mexico. China has their own tariffs on imports from US.

Yes, you are off topic!

Jeff

Sorry -- I was only a multi-million dollar per year importer for a number of years in New York City. So I really don't know much about tariffs etc.

Back to which crank you're trying to figure out.

Quote:

Originally Posted by Gofast (Post 470703)

I just ordered a engine this week from blue print I got the 427 retro fit fuel injection one

So how is your motor doing?
Thanks Kevin

Just one more try to get an update, Thanks Kevin

another try is the motor up and running?