Broke a piston on 17 lbs WHY!!!
Thread Starter
Teching In
Joined: Aug 2007
Posts: 47
Likes: 0
From: Greenville, South Carolina
Straight on. 6 o clock
Thats mine.We were running on the springs at Greer (10 lbs) and had a shock problem. Only ran 5.38
Thanks
I know I'm no help....
but blazingfast, where are you located??? There's a really badass GTO in your bodystyle that I saw at greer (sc) the other day running similar numbers with a twin turbo LS2 setup.
regardless, hope you get it figured out and back up and running soon. Sounds like a great car.
but blazingfast, where are you located??? There's a really badass GTO in your bodystyle that I saw at greer (sc) the other day running similar numbers with a twin turbo LS2 setup.
regardless, hope you get it figured out and back up and running soon. Sounds like a great car.
Thanks
Thread Starter
Teching In
Joined: Aug 2007
Posts: 47
Likes: 0
From: Greenville, South Carolina
I know I'm no help....
but blazingfast, where are you located??? There's a really badass GTO in your bodystyle that I saw at greer (sc) the other day running similar numbers with a twin turbo LS2 setup.
regardless, hope you get it figured out and back up and running soon. Sounds like a great car.
but blazingfast, where are you located??? There's a really badass GTO in your bodystyle that I saw at greer (sc) the other day running similar numbers with a twin turbo LS2 setup.
regardless, hope you get it figured out and back up and running soon. Sounds like a great car.
http://www.youtube.com/watch?v=B4YPkcPIHSM
On The Tree
Joined: Mar 2006
Posts: 112
Likes: 0
From: N.C.
lean corners on blowthrough seems to be fairly common on the ford engines also.
http://www.theturboforums.com/smf/in...c=126908.0;all
the opposite happens with efi because the fuel flow to each cylinder is the same but air flow is higher on the short runners.
I would definately put an EGT on that cylinder.
seems like it would have showed up on the plug sooner.
http://www.theturboforums.com/smf/in...c=126908.0;all
the opposite happens with efi because the fuel flow to each cylinder is the same but air flow is higher on the short runners.
I would definately put an EGT on that cylinder.
seems like it would have showed up on the plug sooner.
TECH Resident
Joined: Dec 2008
Posts: 995
Likes: 0
Someone mentioned 8 EGT sensors. How do you monitor 8 gauges same time?
Will take alot of space, too.
https://ls1tech.com/forums/11561072-post48.html
Will take alot of space, too.https://ls1tech.com/forums/11561072-post48.html
TECH Fanatic
Joined: Apr 2008
Posts: 1,775
Likes: 0
From: Shillington PA
Here it is.
http://www.youtube.com/watch?v=B4YPkcPIHSM
http://www.youtube.com/watch?v=B4YPkcPIHSM
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Someone mentioned 8 EGT sensors. How do you monitor 8 gauges same time? Will take alot of space, too.
https://ls1tech.com/forums/11561072-post48.html
Will take alot of space, too.https://ls1tech.com/forums/11561072-post48.html
I remeber dutweiler doing elbow, turn down testing on some manifolds, and nothing was how it was suppose to be. He ended up offseting the hats on the ntakes a couple inches to get closer to an ever distribution. It could probably be done like the turbo buicks also, with a plate. Search power plate on tb.com.....Jason Crammer (friend) in Utah makes them for buicks. Same problem different hole.
Thread Starter
Teching In
Joined: Aug 2007
Posts: 47
Likes: 0
From: Greenville, South Carolina
The cheap way is to use something like an extech hand held with peak /hold. I have a couple of them. One does 4 stations at the same time, with peak hold.. Then you just move your probes around for a few passes in testing to find the lean cylinders, then keep an eye on those. The best part is you just turn it on, and view it after a pass.....as long as your pretty sure you wont actually melt anything. It might take a few half, 3/4 passes to get confortable knowing your tune before making full passes.
I remeber dutweiler doing elbow, turn down testing on some manifolds, and nothing was how it was suppose to be. He ended up offseting the hats on the ntakes a couple inches to get closer to an ever distribution. It could probably be done like the turbo buicks also, with a plate. Search power plate on tb.com.....Jason Crammer (friend) in Utah makes them for buicks. Same problem different hole.
I remeber dutweiler doing elbow, turn down testing on some manifolds, and nothing was how it was suppose to be. He ended up offseting the hats on the ntakes a couple inches to get closer to an ever distribution. It could probably be done like the turbo buicks also, with a plate. Search power plate on tb.com.....Jason Crammer (friend) in Utah makes them for buicks. Same problem different hole.
lean corners on blowthrough seems to be fairly common on the ford engines also.
http://www.theturboforums.com/smf/in...c=126908.0;all
the opposite happens with efi because the fuel flow to each cylinder is the same but air flow is higher on the short runners.
I would definately put an EGT on that cylinder.
seems like it would have showed up on the plug sooner.
http://www.theturboforums.com/smf/in...c=126908.0;all
the opposite happens with efi because the fuel flow to each cylinder is the same but air flow is higher on the short runners.
I would definately put an EGT on that cylinder.
seems like it would have showed up on the plug sooner.
Someone mentioned 8 EGT sensors. How do you monitor 8 gauges same time? Will take alot of space, too.
https://ls1tech.com/forums/11561072-post48.html
Will take alot of space, too.https://ls1tech.com/forums/11561072-post48.html
http://www.altronicsinc.com/pages/redalert.html
He is correct, I have seen Knock on a graph but it was not present at logging, Why? dont know but maybe because spool up time was so fast and at a very short burst it did not have time to pick it up. Under extreme cylinder pressure and a rotating mass spinning at a very high RPM, it doesnt take much to detonate for 1 second and cause the damage you received...
TECH Apprentice
Joined: Jan 2008
Posts: 366
Likes: 0
From: Gladstone, Queensland, Australia
Never trust a KR log, depends on the sensors sensitivity settings. Whats your comp? You are nice and rich but timing kills. on 17psi with those big turbos you generate a lot of cylinder pressure and those pistons may not take it weather its detonating or not. I would be running a headset with that much boost to check knock and I would pull a few degrees back from there, I bet mph would not drop off anyway.
