KILLER-LS1

iTrader: (18)

sorry I corrected your buddy over there

but yes, I did read the thread. Thanks for asking.

gectek

iTrader: (2)

If you read the thread, you would know he is not my buddy. You are just upset because I made a remark about you toting your ASE Cert. Alot of people can take tests well. Thats all the ASE is. I know, I am a master tech too, but I do not flaunt it to give my posts validity like others do.

LS14EVR

iTrader: (3)

Syclone538

That would pretty much eliminate the intake manifold.

If you can change the fuel supply to the rails that pretty much eliminates #7 injector having the least pressure or collecting any dirt causing the problem.

I don't know exactly how water flows through the engine, but if you can block the ports on the back and only use the ports on the front (LS6), I wonder if it would be better to block the ports in the front and only use the ports in the back, since they are farther from the water pump?

Ryans99ls1

iTrader: (16)

Hmm thats an interesting thought. youd be forcing all the coolant to exit through the rears where there already seems to be a deficiency. just gotta wonder if youd be moving the problem to the front of the motor now. I bet the only way to see would be to try..and i dont think many people will volunteer haha.

Zmg00camaross

iTrader: (11)

Just vent them.

LilJayV10

iTrader: (39)

FlashLCD33

iTrader: (8)

It is not the intake manifold. As Kurt stated, and a couple guys with bewsted LS4 cars that are still blowing up number 7 (yes, the actual 7, idiot). It's not because it's a front fed manifold. I saw an EGT comparison from some of the fast guys that blew that idea out of the water, and showed how bad some carb style intakes distribute air based on EGTs between cylinders. The fuel arrangement doesn't seem to matter either.

It basically has to be cooling related. The steam ports are a big help. GM didn't put them on some engines... but they also didn't put a turbo and an extra 500+hp. Putting your highest flowing injector on #7 is a good idea, and more cooling. I'm not a fan of colder thermostats, but maybe a little bit would help. Oil likes to be around 180 degrees, and I think people running around with 160 t-stats never get it there. A safe tune is a 100% must, and meth injection will help keep cylinder temps down.

There is no 100% fix-all, but a good combination of everything will sure help. Afterall, people are making 1000+hp on stock truck motors... these things can't live forever, and people should have no room to complain when one does pop.

gectek

iTrader: (2)

PS just because a t stat says 160, doesnt mean the coolant stays at 160. They normally regulate the temp to about 170-180. And the vettes have an oil temp sensor so you can log that also. The oil absorbs the heat from the combustion chamber. If your t stat says 160 it doesnt mean your engine and its oil get no hotter than that. It is just that it tries to regulate the engine at a lower temp.

miatainthe10s

If its cooling, I know most of you guys are running regular water pumps. What about remote mount electric water pump reversed cooling. Shove the cool water in the heads and the steam ports? Just a thought.

gectek

iTrader: (2)

Elec water pumps are kind of a touchy subject around here. If you were looking at higher flow reg water pumps, you usually had to go with some expensive units. Now there is the Edelbrock, Meziere makes one, and now Nasty Performance offers some as well. They do flow more water, but its not the amount of water that is flowing through the block, but the distribution of said water and the ability to get all the air pockets out of it that is in question.

miatainthe10s

I agree, wasn't refering to flow more so direction.

Syclone538

Pushing water into the steam ports is another interesting idea, with, or without reverse flow.

I'm new to LS engines. I knew that the LT1 was reverse flow, and I guess just from the location of the thermostat I had always assumed the LS engines were reverse flow too. Heads cooler and bore hotter seemed like a good idea to me, though I can see how it would make it harder to get all the air out. From what I have found it seem the reason for not using reverse flow was legal, not technical.

BadgeZ28

iTrader: (28)

Take a look at all the work done over the years to solve rear cylinder cooling problems in the first generation 400's. Front intake water passages are plumbed to pump water to the rear manifold water ports. Some have run off the water pump into the side of the block to try and get cooler water to the rear. The two motors are different designs but the ideas might be worth investigating. I also think the thin cylinder walls on the LS1 motors is a problem but won't got there here.

miatainthe10s

If that were so wouldn't we see coolant temp rise like the 400 did. I dunno.

BadgeZ28

iTrader: (28)

Good point. We are battling broad overheating with the first gen 400. I guess I am wondering if more that the vent tube mod would help.

miatainthe10s

I would like to see some of the big boy chime in. Like someone who builds these things day in day out. Maybe va speed or Texas.It seems funny that they haven't yet. Or there just laughing cause it just in the tune.

Nasty N8

iTrader: (33)

The Evans cooling pumps are designed and modified for this specific issue. The housing is machined to more evenly cool all cyl.

EVANS COOLING SYSTEMS, INC. high flow coolant pump and pulley combination for the hot-running GM LS1/LS6 engines. The new LS1 Coolant pump and pulley combination, part number EP3913, is designed to not only flow more volume but to offer sufficient cooling to the lone number 7 and 8. Flowing over 20 percent more than the OEM style replacement pumps, the EP3913 maintains equal flow to both cylinder banks at any engine RPM. OEM style pumps do not. Evans has improved the design of the OEM casting to include a Billet pulley hub, heavy-duty 3/4″ roller bearing, and ceramic shaft seal. The EP3913 also includes the Evans 3.8″ OD 8 vane scrolled impeller to reduce parasitic horsepower loss at high RPM.

We have tested against a few popular Electric pumps and it more than doubles the flow at higher RPM. Electric pumps are like running a factory pump at just over 2000rpm all the time. The Evans pump increases flow across the entire RPM range.

https://www.nastyperformance.com/sho...ow-water-pump/

The Alchemist

iTrader: (19)

Now if only the evans pump had a pulley hub on it like the ls2 does so I could use it with the Procharger.

AES Racing

iTrader: (6)

Interesting concept, until I see a infrared thermograph showing evidence, i'll give it a second thought.