help please big ci/ high compression breaking up *UPDATE*
Where did you get this info? I can't find ANY contact information for Morel. As I'm sure you know, Valvoline doesn't make 5-30 VR1 anymore. What oil, that can be found locally, so you suggest?
The info on the lifters is in the description. They don't have a public tech dept. This is what dealers provide.
$100 a case is not bad I have a parts house a hour down the road I get it from. Nothing on an engine like this is cheap. Mine got sold off because I was tired of spending money on the car every week.
Tim
$100 a case is not bad I have a parts house a hour down the road I get it from. Nothing on an engine like this is cheap. Mine got sold off because I was tired of spending money on the car every week.
Tim
Try running NGK 4091 R5671A-7 Racing Plug as they are not projector tip plugs. We have had way more people with issues that turned out to be plug wires than coils going out. Also probably cheaper to test the wires.
Grounds sound like a reasonable thought as they are the root of most mystery issues that start after things have ran well.
Grounds sound like a reasonable thought as they are the root of most mystery issues that start after things have ran well.
Launching!
Joined: Apr 2005
Posts: 229
Likes: 3
From: Frisco TX
Gray is right on the oil, its in the descriptions of both morel and lunati's lifters.
You're running e85 with a 60# injector? I'd think that you were running out of fuel especially at 95% duty cycle. I'd also change the wires to at least 8mm and check grounds. How is the motor bolted into the car, motor plate of mounts? If it's mounts, then the motor make be pulling a ground lose when it torques over under load.
You're running e85 with a 60# injector? I'd think that you were running out of fuel especially at 95% duty cycle. I'd also change the wires to at least 8mm and check grounds. How is the motor bolted into the car, motor plate of mounts? If it's mounts, then the motor make be pulling a ground lose when it torques over under load.
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TECH Enthusiast
Joined: Nov 2006
Posts: 743
Likes: 4
From: melbourne (Aus)
Sounds like running out of injector to me, especially with e85. 60lb isn't that big for that motor. 95% coukd be ceiling for that injector as well, be nice in 80s
Btw oil won't make a difference or spark plugs imho
Btw oil won't make a difference or spark plugs imho
I run the BR7EF@.030 in my 14:1 LS7-427 on E85.
I don't think the plug is the issue. But, I would lean toward electrical before fueling issue, even though you seem to be pushing it a bit at 95%DC on 60lb injectors.
Good luck with the diagnosis. Let us know what you find out.
I don't think the plug is the issue. But, I would lean toward electrical before fueling issue, even though you seem to be pushing it a bit at 95%DC on 60lb injectors.
Good luck with the diagnosis. Let us know what you find out.
Thread Starter
On The Tree
Joined: May 2008
Posts: 153
Likes: 0
So it's been a while here is a update. I put brand new d585 truck coils on the car, new 8mm super conductor wires, new coil harnesses and still the same problem. Took the car to a different tuner. Got to looking at it and had no clue, did complete retune to see if it was just something goofy in the tune still broke up. I'm getting really frustrated at this point. Ron at vengeance racing said it may be valve train as in improper preload, improper pushrod length or something of that nature. I made a pull in the car it was breaking up then momentarily cleared up for a split second. I'm at a total loss guys. Where I'm at now is maybe swap injectors to see, double check all valve train. I would think if the thrust bearing was bad on the crank it would be popping and backfiring as it doesn't know when it should be firing and correct me if I'm wrong but I'd lose tach signal too?
I made a pull in the car it was breaking up then momentarily cleared up for a split second. I'm at a total loss guys.
I see what i thought it was as read true the posts been confirmed in statement above, in my opinion though you said the fuel pressure doesn't drop your -6 fuel lines are running short of your fuel delivery requirements.
The fact that it try to catch on is the ages long hint on fuel shortage half way or later down the track.
Your Walbro 450 lph should be adequate with a full -8 fuel line and aftermarket fuel rails are a necessity sense oem have a step down to -6.
Though there's pressure at the line the injectors are not seen it at the time engine is braking up.
If that doesn't fix it then you must use an external fuel pump and a -10 feed line at list 18 inches long before the pump to avoid cabitation.
Please let us know how it went thanks, David.
I see what i thought it was as read true the posts been confirmed in statement above, in my opinion though you said the fuel pressure doesn't drop your -6 fuel lines are running short of your fuel delivery requirements.
The fact that it try to catch on is the ages long hint on fuel shortage half way or later down the track.
Your Walbro 450 lph should be adequate with a full -8 fuel line and aftermarket fuel rails are a necessity sense oem have a step down to -6.
Though there's pressure at the line the injectors are not seen it at the time engine is braking up.
If that doesn't fix it then you must use an external fuel pump and a -10 feed line at list 18 inches long before the pump to avoid cabitation.
Please let us know how it went thanks, David.
Have you log while is braking up? it should show on the wide band still you already know is not spark cause you changed coils and coil wire with out a fix, you only need two things for ignition spark and fuel.
Is it cutting off? Or breaking up?
For a while my car would cut off at 7000rpm on the track and at 7400 on the dyno.
It was as if I shut the key off and turned it back on.
I changed plugs, wires, coils, added extra grounds. Confirmed power leads.
I never found the "smoking gun" of the problem. It went away when I installed a 16v battery for testing. I swapped my regular battery back in and the problem came back.
I ended up getting a new battery and alternator and the problem hasn't come back yet.
For a while my car would cut off at 7000rpm on the track and at 7400 on the dyno.
It was as if I shut the key off and turned it back on.
I changed plugs, wires, coils, added extra grounds. Confirmed power leads.
I never found the "smoking gun" of the problem. It went away when I installed a 16v battery for testing. I swapped my regular battery back in and the problem came back.
I ended up getting a new battery and alternator and the problem hasn't come back yet.
Launching!
Joined: Apr 2005
Posts: 229
Likes: 3
From: Frisco TX
Thats not really that odd, at higher RPM's with that much compression and that small of an amount of time to fire the plug would require a lot of voltage or at least an electrical system in top shape so you're right on track there.