needs new holes drilled? 
Summit Racing 6.0 LS Block
My understanding is these blocks from summit are actually done by ATK Performance. Summit just re-sells them. If you got to ATK's website http://high-performance-engines.com/...duct_Code=13G8 you'll see they have the same block and sell it for 50 dollars less then summit ask for. Plus shipping is cheaper. How do I know? I just bought one from Brandon (user name Notalent) he's a service manager for ATK and he has a post listed here with details: https://ls1tech.com/forums/parts-cla...ort-block.html
he offers a 5% discount for LS1tech members. My block is coming in this morning so I'll post pics later to compare.
he offers a 5% discount for LS1tech members. My block is coming in this morning so I'll post pics later to compare.
Teching In
Joined: Oct 2013
Posts: 42
Likes: 0
Brandon (user name Notalent) he's a service manager for ATK and he has a post listed here with details: https://ls1tech.com/forums/parts-cla...ort-block.html
Hey everyone,
My bare block from ATK Performance (User "Notalent") arrived today.
I must say I was very pleased with the total transaction as a whole. I called Brandon at ATK on Wed. last week (1/15/14) and ordered a Lq4 bare block. It arrived today via freight delivery.
Block arrived well packaged. I had already opened it up to verify contents before taking this pic.
Again, very well packaged.
Block itself looks great. Bores are clean and block itself appears in great shape. Gave it a good solid look over. New cam bearings and oil galley plugs check.
Again, well packaged, well shipped, and the block looks to be in great shape. I don't have a bore dial to check the .30 over bore yet though. But I have no doubt it was done correctly. Again, very well done for ATK. Now to start building my 408.
My bare block from ATK Performance (User "Notalent") arrived today.
I must say I was very pleased with the total transaction as a whole. I called Brandon at ATK on Wed. last week (1/15/14) and ordered a Lq4 bare block. It arrived today via freight delivery.
Block arrived well packaged. I had already opened it up to verify contents before taking this pic.
Again, very well packaged.
Block itself looks great. Bores are clean and block itself appears in great shape. Gave it a good solid look over. New cam bearings and oil galley plugs check.
Again, well packaged, well shipped, and the block looks to be in great shape. I don't have a bore dial to check the .30 over bore yet though. But I have no doubt it was done correctly. Again, very well done for ATK. Now to start building my 408.
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I just got burned on one of these junk blocks.
I rec'd the block and dropped it off at machine shop to have it drilled & tapped for 1/2" head studs and 11mm main studs also. $450 of work later I get it back to discover the thrust bearing had been worn through and the crank cut into the block and main cap rendering the block useless. Summit will not cover the $$ I am out for the machine work just refund the block $$. Also the main caps were run across a belt sander instead of being ground, and the caps were scratched & beat up on the ID from the hold-down bar, the main hone should have been the last process done.
Stay away from these blocks is all I can say!!
Summit won't be getting another dollar from me ever after this!
I rec'd the block and dropped it off at machine shop to have it drilled & tapped for 1/2" head studs and 11mm main studs also. $450 of work later I get it back to discover the thrust bearing had been worn through and the crank cut into the block and main cap rendering the block useless. Summit will not cover the $$ I am out for the machine work just refund the block $$. Also the main caps were run across a belt sander instead of being ground, and the caps were scratched & beat up on the ID from the hold-down bar, the main hone should have been the last process done.
Stay away from these blocks is all I can say!!
Summit won't be getting another dollar from me ever after this!
Ummm, don't want to come off rude or anything but why didn't you inspect the block fully before having any machine work done? Or as from what I gathered you bought a short block not a bare block which leads to the question, why didn't the machine shop catch this before doing all the work in that area?
I just got burned on one of these junk blocks.
I rec'd the block and dropped it off at machine shop to have it drilled & tapped for 1/2" head studs and 11mm main studs also. $450 of work later I get it back to discover the thrust bearing had been worn through and the crank cut into the block and main cap rendering the block useless. Summit will not cover the $$ I am out for the machine work just refund the block $$. Also the main caps were run across a belt sander instead of being ground, and the caps were scratched & beat up on the ID from the hold-down bar, the main hone should have been the last process done.
Stay away from these blocks is all I can say!!
Summit won't be getting another dollar from me ever after this!
I rec'd the block and dropped it off at machine shop to have it drilled & tapped for 1/2" head studs and 11mm main studs also. $450 of work later I get it back to discover the thrust bearing had been worn through and the crank cut into the block and main cap rendering the block useless. Summit will not cover the $$ I am out for the machine work just refund the block $$. Also the main caps were run across a belt sander instead of being ground, and the caps were scratched & beat up on the ID from the hold-down bar, the main hone should have been the last process done.
Stay away from these blocks is all I can say!!
Summit won't be getting another dollar from me ever after this!
That being said, on a side note, the main hone is always the first process done in machining. All other measurements are based off the crank centerline
TECH Enthusiast
Joined: Apr 2010
Posts: 651
Likes: 10
From: North Carolina
Ummm, don't want to come off rude or anything but why didn't you inspect the block fully before having any machine work done? Or as from what I gathered you bought a short block not a bare block which leads to the question, why didn't the machine shop catch this before doing all the work in that area?
TECH Enthusiast
Joined: Apr 2010
Posts: 651
Likes: 10
From: North Carolina
The one thing I got from this thread was the old "unless it costs more, it's crap" mantra ( similar to "anything but AFR heads suck" ) . . . That's not always true.
With a thorough checkout, this block sounds like a good way to go for people building their own motors on a tight budget.
With a thorough checkout, this block sounds like a good way to go for people building their own motors on a tight budget.
Werewolf SS & ez2cdave The "Machine Shop" is just that a machine shop, they are not an engine shop, an engine shop doesn't have a $125k horizontal boring machine to do the job I had done, I have been quoted by Engine builders $800 and up to do what I had done for $450 on the proper piece of equipment, and probably a lot quicker turn around than an engine builder.
The bottom line is I am not paid by Summit to perform their quality control, nor should I have to pay someone else to do it for me, that is why I bought a finished product from a supposedly reputable vendor.
The bottom line is I am not paid by Summit to perform their quality control, nor should I have to pay someone else to do it for me, that is why I bought a finished product from a supposedly reputable vendor.
11 Second Club
Joined: Aug 2012
Posts: 730
Likes: 0
From: Middletown, DE
Has anyone used one of the Summit Racing 6.0 Bare Blocks?
http://www.summitracing.com/parts/SUM-150105/
http://www.summitracing.com/parts/SUM-150105/
TECH Enthusiast
Joined: Apr 2010
Posts: 651
Likes: 10
From: North Carolina
11 Second Club
Joined: Aug 2012
Posts: 730
Likes: 0
From: Middletown, DE
I just wanted to post my experience with this Summit Iron Block.
First off, I'd like to say Thank You to Oscar and Summit Racing for the OUTSTANDING customer service. I've always purchased my stuff from the local store here in Reno. Never had an issue that wasn't easily resolved. I will always do business with Summit Racing.
I bought this block about a year ago and didn't get to work on it until about 2 months ago. I put the Bore Dial Gauge to the Cylinders and found that NONE of them came in at 4.030". They all ranged from 4.0260" - 4.0280". None of them were consistent at all. With the engine still sitting on the crate, the cylinders were out of round. They were completely warped, and had inconsistencies between the top and bottom of each bore.
They're also advertised as having NEW Cam bearings installed. Not mine. Not even close. (However, the one recently aired on Power Nation DID have New Cam Bearings) go figure...
I also purchased a set of Wiseco pistons for a 4.030" bore prior to checking this block. And although Summit offered to buy back or swap out the block, I decided to take it to my local machine shop to get the cylinders honed to the correct size, check the line hone and install NEW Cam Bearings. I'll be picking it up this afternoon.
Anyways,
I just wanted to post my experience with this block. Hopefully the shortblock assemblies coming out of ATK aren't built on these foundations/specs.
First off, I'd like to say Thank You to Oscar and Summit Racing for the OUTSTANDING customer service. I've always purchased my stuff from the local store here in Reno. Never had an issue that wasn't easily resolved. I will always do business with Summit Racing.
I bought this block about a year ago and didn't get to work on it until about 2 months ago. I put the Bore Dial Gauge to the Cylinders and found that NONE of them came in at 4.030". They all ranged from 4.0260" - 4.0280". None of them were consistent at all. With the engine still sitting on the crate, the cylinders were out of round. They were completely warped, and had inconsistencies between the top and bottom of each bore.
They're also advertised as having NEW Cam bearings installed. Not mine. Not even close. (However, the one recently aired on Power Nation DID have New Cam Bearings) go figure...
I also purchased a set of Wiseco pistons for a 4.030" bore prior to checking this block. And although Summit offered to buy back or swap out the block, I decided to take it to my local machine shop to get the cylinders honed to the correct size, check the line hone and install NEW Cam Bearings. I'll be picking it up this afternoon.
Anyways,
I just wanted to post my experience with this block. Hopefully the shortblock assemblies coming out of ATK aren't built on these foundations/specs.