Supercharged Ls V8

this is going to be soo sweet. Make sure to keep us posted. Good luck with the tests quik
 
One more day and we should see some numbers. YEAHHHHHHH
 
Well - I hate to be a tease..........

We worked all night on the car - yes the neighbors will be a bit grouchy this morning since they didn't get any sleep.....

I can't hit the dyno today - we have an overheating issue I have to fix. the car drives fine, all day long until I add some boost.

So it one of two things:
- the re-plumping of the aux cooling pump is siphoning off too much cold coolant before it reaches the engine (should be easy enough to test)
- I'm making too much boost. we were shooting for 4-5psi, but it looks like I coming in 7-8psi. I need to get a good mechanical gauge to make sure. I'm fine with 7psi, not fine with 8.

I have a front mount intercooler coming tomorrow - so tonight I'll work on the cooling issue and make sure the problem is boost related (which should go away with the intercooler) - then plan on hitting the dyno next week.....

I was going to end up with an intercooler anyways - so this just accelerates that step.

...sorry I know everyone is anxious but if we are going to spend a half day on the dyno $$$$ - I want to make sure we get the most out of the money spent.
 
thanks for the update Quik. Hopefully you can figure out for sure what it is tonight. good luck
 
Lou,

Good progress. As for the cooling issue, didn't the OLOA boys put a bigger radiator in their car? Last thing I remember from them was that the stock LS cooling system was ok so adding items like this would cause you to be "under" cooled...if that's a word. Have you looked into an aftermarket radiator or bigger intercooler?
 
yep - that was always the weak point........

I was hoping to aviod that by only running 4-5psi - but since it looks like I'm higher than that - gotta deal with it now.... ;)

I'm hoping by adding the IC it will bring me back down close to even.....

If every psi increases the temp of the intake charge by 15 - 18 degrees:
- then 4psi = + 72 degrees over outside
- then 7psi = + 126 degrees over outside

if the IC can get a 77% efficiency in cooling (which they claim) - 126 degrees * .77 = drop by 97 degrees.

So I'll be left with only a 19 degree increase at 7psi....

That's providing that the cooling issue is simply caused by boost ;)
 
Quik LS said:
yep - that was always the weak point........

I was hoping to aviod that by only running 4-5psi - but since it looks like I'm higher than that - gotta deal with it now.... ;)

I'm hoping by adding the IC it will bring me back down close to even.....

If every psi increases the temp of the intake charge by 15 - 18 degrees:
- then 4psi = + 72 degrees over outside
- then 7psi = + 126 degrees over outside

if the IC can get a 77% efficiency in cooling (which they claim) - 126 degrees * .77 = drop by 97 degrees.

So I'll be left with only a 19 degree increase at 7psi....

That's providing that the cooling issue is simply caused by boost ;)
Click to expand...


Yeah, that IC will help you cool things QUITE considerably! I bet you are getting REALLY heatsoaked while running not only the engine hot rad fluid through that one radiator, but also the heatons cooling fluid too. Heck, even with an water/air IC you will occasionally experience heatsoak during certain times. That is just the name of the game with our PD blowers. Even the twin screws get hot as heck with a really efficient IC. :)
 
Boy...I really hated to hear this Quik. Heat on a s/c car is the kiss of death. It can put a stop to the whole project. Even on our Cobras that were designed with the s/c, there are heating concerns. There are mods to increase flow through the cylinder heads, bigger radiators, better intercoolers, larger intercooler tanks, etc. They all help...but the single biggest problem you have is the (h)eaton. Those damn things just create too much heat. That is why everyone who gets serious about their car swaps to a Whipple or Kenne Bell. And quite honestly, the new Whipple that's out is absolutely the most amazing blower on the market. It's flying off the shelves to the tune of about 5 to 1 to the KB with the SVT boys. They are insane with their efficiency...and low charge temps.

I wish you the best with this because it can kill your whole project if you can't work it out. Limiting boost with the Eaton is without a doubt your first priority...and you may need a larger pulley for that. The intercooler is your next best step since your math is very good. It is amazing how well that will help. Ensuring that all intake air is taken outside the hood is another priority. If you're sucking in heated air to begin with, you're sunk.

I sure hope you find something minor here!
 
2001LS8Sport said:
Boy...I really hated to hear this Quik. Heat on a s/c car is the kiss of death. It can put a stop to the whole project. Even on our Cobras that were designed with the s/c, there are heating concerns. There are mods to increase flow through the cylinder heads, bigger radiators, better intercoolers, larger intercooler tanks, etc. They all help...but the single biggest problem you have is the (h)eaton. Those damn things just create too much heat. That is why everyone who gets serious about their car swaps to a Whipple or Kenne Bell. And quite honestly, the new Whipple that's out is absolutely the most amazing blower on the market. It's flying off the shelves to the tune of about 5 to 1 to the KB with the SVT boys. They are insane with their efficiency...and low charge temps.

I wish you the best with this because it can kill your whole project if you can't work it out. Limiting boost with the Eaton is without a doubt your first priority...and you may need a larger pulley for that. The intercooler is your next best step since your math is very good. It is amazing how well that will help. Ensuring that all intake air is taken outside the hood is another priority. If you're sucking in heated air to begin with, you're sunk.

I sure hope you find something minor here!
Click to expand...


Yep. Being that he is running pretty low boost even on the heaton the IC should do the trick. You figure by putting all that heat through one venue (regular rad) that it is kind of a catalyzing affect, causing exponential heatsoak because the cooling system cannot keep up.

Once the new water/air IC goes in his IAT's will drop a lot. It might even be worthwhile to attach a few small aux elec fans to the IC too. Help push some more air through to cool down while idling in between runs. Lessens the chance of back to back runs causing heatsoak. That will depend on the room you have available of course. I haven't measured the front bumper area so I have zero idea of what room Quik is playing with.
 
rocket5979 said:
Once the new water/air IC goes in his IAT's will drop a lot. It might even be worthwhile to attach a few small aux elec fans to the IC too. Help push some more air through to cool down while idling in between runs.
Click to expand...

Here's a place to start with that. It's a shop here in the Valley that is absolutely amazing with their innovation and tuning. The website is crude...but thank God their work and parts aren't. I have no idea if this would fit...but it's at least something to look at.

http://www.svcmotorsports.com/scripts/ItemDetails.asp?ItemID=329
 
2001LS8Sport said:
Ensuring that all intake air is taken outside the hood is another priority. If you're sucking in heated air to begin with, you're sunk.
Click to expand...


the hole in my hood should help that... ;)
 
2001LS8Sport said:
Here's a place to start with that. It's a shop here in the Valley that is absolutely amazing with their innovation and tuning. The website is crude...but thank God their work and parts aren't. I have no idea if this would fit...but it's at least something to look at.

http://www.svcmotorsports.com/scripts/ItemDetails.asp?ItemID=329
Click to expand...


I've used the Snow Performance stuff in the past -
http://www.snowperformance.net/

I could even go with a simple IC cooler -> http://www.nitrousexpress.com/Catalog/2006/ntercooler.pdf

I really think a front mount with the 'right' amount of boost should fix me.... we'll know more this weekend....
 
Quik LS said:
I really think a front mount with the 'right' amount of boost should fix me.... we'll know more this weekend....
Click to expand...

I agree. It will help your heat situation quite a bit! You figure that your system is what is stock in a lot of other cars (6-7 psi on a roots). All they do is have electric fans and a separate IC and they are fine, which means that yours should be kosher as well. :cool:
 
allkesh said:
Have you thought about Alcohol Injection?
Are you running stock cams?
Click to expand...


Yes - I would rather stay away from chemically cooling the charge if I can. The link I posted about Snow Performance is a kit that I have used before.

Yes - stock for now - I have a set of re-tuned cams that I'll try after I get the SC up and running. If this is going to be a kit we have to stay with stock as much as feasible.
 
Quik LS said:
Well - I hate to be a tease........
Click to expand...
OH PLEASE QUICK!!!!! You have been since the day I joined this site..

Your skills, always improving..your talents on making the best, hottest (err, well coolest!) and fastest running set of wheels on the road..

Torture....tantalizing torture...it's brought me to beggin on my knees....please, ohhhh please....the next time you are bent over that huge hot engine of yours....snap a pic for the HOTTIES thread...(or just for me....).

Forgive my boldness Quick...but your lust, desire to have the ultimate running machine....and the way you inspire others...getting the greatest hottest minds working to come up with the ultimate solution...

it's just damn HOT!!!!

MsM8
 
allkesh said:
Have you thought about Alcohol Injection?
Are you running stock cams?
Click to expand...

The problem with alchohol injection is...well...the alchohol! It is so corrosive that it can harm the rotors on the blower....especially if the tips are treated. You can use ethanol instead of methanol and that will help...but not cure the problem. Believe me...I would have it otherwise on my Cobra and Snow performance is the way I would go....because it can be awesome!!

Damn Quik....I think you just got propositioned!!! I had this brief glimpse in my mind of you and her and the fender of your car....
 
MsM8tress said:
Ok Ok.....HOT in the COOOOLEST WAY HOTTIE!!!!!

MsM8
Click to expand...
Damn MsM8tress....you just need to take a trip down to Austin, TX and thank Lou personally! I'm sure his wife won't mind! LOL!
 
OH YEE OF LITTLE FAITH.... bad move!!!!!!!!

SO "THE KIT" WILL REQUIRE AN AFTERMARKET EXHAUST SINCE THE STOCK EXHAUST WILL HAVE HIGHER BOOST PRESSURE.
 
allkesh said:
OH YEE OF LITTLE FAITH.... bad move!!!!!!!!

SO "THE KIT" WILL REQUIRE AN AFTERMARKET EXHAUST SINCE THE STOCK EXHAUST WILL HAVE HIGHER BOOST PRESSURE.
Click to expand...


Stock exhaust will work fine, where are talking an SC here.
 
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