When you click on links to various merchants on this site and make a purchase, this can result in this site earning a commission. Affiliate programs and affiliations include, but are not limited to, the eBay Partner Network.
Curious to see if anyone has found the limit of a stock block? And limit with Darton sleeves? Thinking about really turning the car up over the winter and may upgrade my shortblock.
Don’t know about all of them, but we cracked a sleeve around 1450-1500 boost only... upgraded to the Darton sleeved block and now fixing to start testing.
Don’t know about all of them, but we cracked a sleeve around 1450-1500 boost only... upgraded to the Darton sleeved block and now fixing to start testing.
I would think this would be pushing a stock block by what I have seen in the ls stuff also. That is pushing it man did you use on the bad motor bolts are studs plus did you use to help hold the main caps in place to help keep from walking on you.
Don’t know about all of them, but we cracked a sleeve around 1450-1500 boost only... upgraded to the Darton sleeved block and now fixing to start testing.
Wheel HP? Where would you put the "safe" limit (e.g where cars seem to be surviving with limited ~25% track use).
Curious to see if anyone has found the limit of a stock block? And limit with Darton sleeves? Thinking about really turning the car up over the winter and may upgrade my shortblock.
Dave If I where going to go this way make dam sure you get a shop that is doing the Darton sleeves REALLY know what they are doing. I have heard & seen them put in & people has had bad problems from the not so good work r the prep in how it was done. But also have seen were the motor has taking stuff & good amount of time also just driven it like it was stolen all the time on track & street... Robert
What’s the difference between the LS and LT blocks? Also what’s the difference in the heads? People seem to be pushing crazy power using stock head castings. What makes the LT stronger than the LS?
Curious to see if anyone has found the limit of a stock block? And limit with Darton sleeves? Thinking about really turning the car up over the winter and may upgrade my shortblock.
we offer fully built sleeved LT blocks and to my knowledge we did the first one in early 2014 in my LT1 C7 making it similar to the LS7 architecture right down to the big valve heads!
highly suggest the sleeved configuration when boosting! it adds rigidity to the block as well as the option for larger pistons.
my LT4 compound boost ZL1 makes 1100 lb ft of torque BEFORE 4500 RPMs through the stock blower running our SPI kit, Chiller, etc with a 427!
Checkout the Torque peak and flat HP from 4800 RPM on up vs. the Whipple and F1X! This thing literally is close to pulling the front wheels from a 30 roll LOL
Sleeve the block if over 900+ wheel. My stock LT4 started developing cracks between the bores. See my last pic between cylinders 5 and 7, right where the cylinders nearly meet, there is a hairline crack you can see easily with eyes. Not good. Especially compared to powerbore or darton sleeves.
This is good stuff to know... on LME website it says their shortblocks are rated at 1400? And it doesn’t specify if they have darton sleeves or not? I’m guessing not for the price and they still on GM crank
You would be crazy to spend $8000+ on a short block and not spend an extra $$ to re-sleeve with Darton or PowerBore. Especially if going over 1000 wheel. Spend the money it's worth it. Hell over 1300-1400 wheel I would top fuel hoop the block and heads also and never worry about head gaskets again. If you have the money to hit 1300-1400 wheel you should have the money to make it reliable horsepower. My opinion anyway.
11-03-2018, 10:29 AM
LT1/LT4 Block Limit vs Darton Sleeves
