Atk-408
Thread Starter
Teching In
Joined: Jan 2018
Posts: 14
Likes: 1
Atk-408 anyone have any experience with the ATK-408 short blocks? I'm looking at the sp26-b and seems like a good deal for the money. I would be using a set of ls3 heads and a summit stage 4 turbo cam, holley intake with a shearer A2W and a pair of borg s363's.
I was in the same market.
ATKs reviews are still terrible all across the net with dissatisfied customers. While I am sure they ship out some good units I believe heavily in review processes and how a company handles them. They dug themselves a large hole IMO.
There are even some bad reviews from within Summit Racing for ATK. Summit is a distributor of ATK.
I ended up buying a 408 short block from a much smaller company called AMS racing. The price was better by a good bit and they will build it however you like.
That being said I don't have it in my possession so their quality remains to be seen. Their reviews are very good though in comparison.
ATKs reviews are still terrible all across the net with dissatisfied customers. While I am sure they ship out some good units I believe heavily in review processes and how a company handles them. They dug themselves a large hole IMO.
There are even some bad reviews from within Summit Racing for ATK. Summit is a distributor of ATK.
I ended up buying a 408 short block from a much smaller company called AMS racing. The price was better by a good bit and they will build it however you like.
That being said I don't have it in my possession so their quality remains to be seen. Their reviews are very good though in comparison.
Stay away from Thompson, three different people local to me have used them, will never use them again and actively warn others not to as well.
I would avoid ATK personally as well. I got my lsnext short block from CNC motorsports and while I did have one minor issue with it (they missed a small oil hole plug in the lifter valley area that led to low oil pressure on start up) I got it fixed and it's been rock solid for me since. I would probably use them again and they're more on the budget end of things too. They're worth checking out for sure.
I recently had an engine built by AMS (Gen 4 forged 370CI iron block). The process was pretty much seamless from the ordering online, talking about the build over the phone, to receiving it at my shop. Will be installing it in a Procharged C6 soon and will report back to this thread if I can remember. So far, impressed with them.
Trending Topics
I recently had an engine built by AMS (Gen 4 forged 370CI iron block). The process was pretty much seamless from the ordering online, talking about the build over the phone, to receiving it at my shop. Will be installing it in a Procharged C6 soon and will report back to this thread if I can remember. So far, impressed with them.
Well this obviously helps reassure my decision making process lol. This kind of **** is stressful to me and many others I'm sure.
What was the turnaround time for you? I am looking at 4-6 weeks. I am hoping for the sooner as I'd like to get my car back on the road but beggars can't be choosers.
LS1 Tech Stories
The Best V8 Stories One Small Block at Time
Gas Monkey Built a 6-Wheel Ferrari Testarossa With a Corvette LT4 Engine
Verdad Gallardo
7 Most Reliable High-Performance Engines GM Has Ever Built
Verdad Gallardo
Amazing '71 Camaro Restomod Is Modern Muscle Car Under the Skin
Verdad Gallardo
6 Common C5 Corvette Failures and What's Involved In Repairing Them
Pouria Savadkouei
Retro Modern Bandit Pontiac Trans AM Comes With Burt Reynolds' Autograph
Verdad Gallardo
Top 10 Greatest Cadillac V Series Performance Models Ever, Ranked
Pouria Savadkouei
Top 10 Most Powerful Chevy Trucks Ever Made!
Hennessey's New Supercharged Silverado ZR2 Has 700 HP
Verdad Gallardo
Coachbuilt N2A Anteros Is an LS2-Powered C6 Corvette In Italian Clothes
Verdad Gallardo Yes they do have an Ebay store. I didn't buy through there though as I would have had to pay like 450 bucks in state sales tax. Buying direct got rid of that.
Well this obviously helps reassure my decision making process lol. This kind of **** is stressful to me and many others I'm sure.
What was the turnaround time for you? I am looking at 4-6 weeks. I am hoping for the sooner as I'd like to get my car back on the road but beggars can't be choosers.
What was the turnaround time for you? I am looking at 4-6 weeks. I am hoping for the sooner as I'd like to get my car back on the road but beggars can't be choosers.
Build times will vary depending on what crank you decide to go with I'm sure.
what happend? can you go into detail? and were they recent? my thompson just did 900 wheel and is fine. going to bump up to a t6 next year and do 1000-1100 wheel.
No doubt, I ordered it May 18th and received it June 15th. I opt'd for them to deburr the block as well. This was a basic short block build with an Eagle rotating assembly/ARP main studs/ rings gapped for 20 psi.
Build times will vary depending on what crank you decide to go with I'm sure.
Build times will vary depending on what crank you decide to go with I'm sure.
Thanks for the good info LaBLK. I ordered on 6/13 We shall see. Eagle Crank and H beam rods. I told them whatever piston they wanted to be around 9.5:1
We also agreed on gap rings for 20psi even though I'll likely never be that high anytime soon.
At least you are close to them it appears. I gotta a 500.00 bill to get it trucked to Washington.
Thanks for the good info LaBLK. I ordered on 6/13 We shall see. Eagle Crank and H beam rods. I told them whatever piston they wanted to be around 9.5:1
We also agreed on gap rings for 20psi even though I'll likely never be that high anytime soon.
At least you are close to them it appears. I gotta a 500.00 bill to get it trucked to Washington.
We also agreed on gap rings for 20psi even though I'll likely never be that high anytime soon.
At least you are close to them it appears. I gotta a 500.00 bill to get it trucked to Washington.
Another bought a short block and paid for diamond pistons and clevite coated bearings, got probe pistons and standard king bearings, thompson offered no help.
Another had a six bolt 388 built, big turbo combo, lost oil pressure on the dyno, wiped out the bearings in the bottom end, clearances were all over the map, had it rebuilt locally, no more issues.
This was several years ago.
Just a quick update for AMS racing. Got a phone call on the morning of 7/8 after ordering short block on 6/13 saying my engine was ready to go. Shipping was a couple hundred more than I was hoping for but unfortunately it is what it is. Shipping company picked it up and had it on the road that afternoon. Pretty excited to see what this thing looks like in person!
Just a quick update for AMS racing. Got a phone call on the morning of 7/8 after ordering short block on 6/13 saying my engine was ready to go. Shipping was a couple hundred more than I was hoping for but unfortunately it is what it is. Shipping company picked it up and had it on the road that afternoon. Pretty excited to see what this thing looks like in person!
Great to hear your engine is on the way, can you do an unboxing so everyone can see what they get when ordering from AMS?
