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.
Something went wrong today during my HPDE. I haven’t directly got into what’s the true issue for I haven’t found the direct source yet. This was my 13th (lucky number, right) two day event. So 26 days at Road Atlanta and roughly 12K total miles. Finished my session and upon parking in the paddock quickly noticed that the entire outside rear bumper was what looked like sprayed oil. The whole diffuser was coated. So obviously this is how the oil directed its way to the rear bumper. Also the skid plate was covered and there was small pools of oil in the craddle also. Oil pressure was still good. Didn’t hear anything unusual at all.
Got under the car and removed some panels and saw nothing unusual. Oil filter was clean and sealed great. Drain bolt tight. There was some oil on the upper side of the block just under the manifold/ throttle body area. I’ll get pics in a day or two once on the lift or I’ll find something then, maybe. But lots of puddles in the cradle on drivers side. For now I don’t know what’s going on. Had been driving casually for a month leading up to this. I made the choice right then and there. Going for a build. Started the car to load it up. Good bit of white smoke came out of the passenger exhaust side. Oil pressure was still good and just loaded it up real quick.
It has to be serious on some level. Either way I’m jumping in and going for a good built reliable NA motor for HPDE. Would like to hear some suggestions on what would be necessary for my situation. Never had a built motor before and like to be more informed when going in. I have a great well known performance shop I’ll be going to and obviously I’ll consult with. That’s no issue. Just like to know a little more going in. Any suggestions on what parts would be truly necessary for a better more reliable NA motor for HPDE duties? What are the true weak links on a stock NA? Such as bearings, push rods, springs, head studs, trunnions, and so on.
I already have most all bolt on NA mods currently besides headers. But might as well add them. I’d like to get ported heads and might as well get a cam. Plan on a DOD delete and so on. E85 is very limited in my area so that could be a bummer but I’ll look into that also.
Last edited by NoMatter; Oct 21, 2023 at 11:13 PM.
I guess the route you take will depend on the diagnosis, huh? If you have to resleeve the block due to catastrophe, that's a different ball game compared to a single bad ring. The easy answer is build a 427 stroker and go smack around Z06s I'd either keep it simple and do a mild cam, headwork and upgraded valve train or just go full retard and do a built 427. I now one is like a $20,000 proposition and the other is double that. Speed cost money, how fast do you want to go? With your existing mods, you should be around 600-630hp properly tuned even with a basic cam/heads/tune build. The only concern reliability-wise I'd have at that point is whether or not the Stingray cooling system could keep pace with 25% more power than stock in a track environment. Probably need some help there.
Last time i spoke with HPR they said the limiting factor on CI was the lt2 oil pan. It didn’t leave much room fore counterweight on a stroker crank. That can be fixed I’m guessing.
No idea. Katech gives a rudimentary parts list for their 427 package and it makes no mention of the oil pan. They offer two flavors: street at 700hp and track at 750hp. But I figure that at $45,000 for openers, they'll figure out the oil pan.
Something went wrong today during my HPDE. I haven’t directly got into what’s the true issue for I haven’t found the direct source yet. This was my 13th (lucky number, right) two day event. So 26 days at Road Atlanta and roughly 12K total miles. Finished my session and upon parking in the paddock quickly noticed that the entire outside rear bumper was what looked like sprayed oil. The whole diffuser was coated. So obviously this is how the oil directed its way to the rear bumper. Also the skid plate was covered and there was small pools of oil in the craddle also. Oil pressure was still good. Didn’t hear anything unusual at all.
Got under the car and removed some panels and saw nothing unusual. Oil filter was clean and sealed great. Drain bolt tight. There was some oil on the upper side of the block just under the manifold/ throttle body area. I’ll get pics in a day or two once on the lift or I’ll find something then, maybe. But lots of puddles in the cradle on drivers side. For now I don’t know what’s going on. Had been driving casually for a month leading up to this. I made the choice right then and there. Going for a build. Started the car to load it up. Good bit of white smoke came out of the passenger exhaust side. Oil pressure was still good and just loaded it up real quick.
It has to be serious on some level. Either way I’m jumping in and going for a good built reliable NA motor for HPDE. Would like to hear some suggestions on what would be necessary for my situation. Never had a built motor before and like to be more informed when going in. I have a great well known performance shop I’ll be going to and obviously I’ll consult with. That’s no issue. Just like to know a little more going in. Any suggestions on what parts would be truly necessary for a better more reliable NA motor for HPDE duties? What are the true weak links on a stock NA? Such as bearings, push rods, springs, head studs, trunnions, and so on.
I already have most all bolt on NA mods currently besides headers. But might as well add them. I’d like to get ported heads and might as well get a cam. Plan on a DOD delete and so on. E85 is very limited in my area so that could be a bummer but I’ll look into that also.
Thank you guys for the suggestions. Car still fires up for unloading and oil pressure is great. Doesn’t seem to be any obvious leaks when running under no load.Here’s some picture. Curious if it isn’t a rear engine seal based on what seems like the point of origin front the first picture. But there’s oil on top side seen below. I assume that would still be the problem for it has to sling or forced out in multiple areas. I have seen a few cases on the C8 where this has happen and curious if it isn’t high crankcase pressure or just a simple failure.
Below you see oil on the left all over that white plastic portion and then some puddled right next to the right side of the wiring harness and DCT cooler
The car has been very good to me. I don’t need globs of power. The car is capable on the track. Just want that extra good bump and keep increasing my skills.
Last edited by NoMatter; Oct 22, 2023 at 01:42 PM.
Smart move. All a dealer will do is (maybe) work with you on warranty and put it back to a stock configuration all while screwing up 15 other things in the process. You should be comfortably at 600hp with your supporting mods, even more on E85. An extra hundred and change horsepower is going to be a game-changer. It'll be like having a whole new car when you get it on track. All your braking points will change with all the additional speed you'll be carrying.
Smart move. All a dealer will do is (maybe) work with you on warranty and put it back to a stock configuration all while screwing up 15 other things in the process. You should be comfortably at 600hp with your supporting mods, even more on E85. An extra hundred and change horsepower is going to be a game-changer. It'll be like having a whole new car when you get it on track. All your braking points will change with all the additional speed you'll be carrying.
Right. Been down that road before. Best bet is always a professional performance shop for what I can’t do. This car needs different gearing. Especially 5th. It’s embarrassing on long straight always. Just have to live with that. But I’ll definitely be happy with the extra performance and the tuning.
Hopefully not for too much longer. Once the TCU is cracked, we should see revised gearsets come on line. Even if they don't, you should at least be able to source the Z06 transfer gear to give you that 5.56 final drive which will help a bit. I'd be concerned using that aggressive gearing on an LT2 with all the low-end torque but if you give her an aggressive cam and trade some low end for more midrange and up punch, it should work.
No idea. Katech gives a rudimentary parts list for their 427 package and it makes no mention of the oil pan. They offer two flavors: street at 700hp and track at 750hp. But I figure that at $45,000 for openers, they'll figure out the oil pan.
We have a way around the oil pan clearance issue. The $45,000 figure includes engine removal, engine reinstallation, engine dyno break in, chassis dyno tuning, ect. We can certainly build one for quite a bit less if you send us a core engine and do the install yourself.
We have a way around the oil pan clearance issue. The $45,000 figure includes engine removal, engine reinstallation, engine dyno break in, chassis dyno tuning, ect. We can certainly build one for quite a bit less if you send us a core engine and do the install yourself.
You guys have any track day cooling solutions in the works for the 600hp+ packages? I've heard even stock cars pull crazy timing on track days. Probably don't want to tune that protection out especially with increased power levels, just throw more cooling at the problem.
I know Chris His car is awesome, while i was the first guy on this platform to start cutting it up, Chris took my enthusiasm in ruining a perfectly good car and took it to another level. Haha.
I know Chris His car is awesome, while i was the first guy on this platform to start cutting it up, Chris took my enthusiasm in ruining a perfectly good car and took it to another level. Haha.
Hey man, you're a YouTube legend at this point so fair game!
I asked that question to see if he had done your suspension, aero, and brake mods. If so, I'd just stop there and learn to get that setup into the 1:29s just like you're buddy. No need for more power or stickier tires when your seconds from the true potential of the car... at least that's my philosophy. I know, too many opinions on the internet, but there's mine. Lot's of potential fun to run down c7 and c8 z06s with only 495hp and a giant set of...
Hey man, you're a YouTube legend at this point so fair game!
I asked that question to see if he had done your suspension, aero, and brake mods. If so, I'd just stop there and learn to get that setup into the 1:29s just like you're buddy. No need for more power or stickier tires when your seconds from the true potential of the car... at least that's my philosophy. I know, too many opinions on the internet, but there's mine. Lot's of potential fun to run down c7 and c8 z06s with only 495hp and a giant set of...
Chris took my blueprint and expanded on it. We have fairly similar mods in the Aero and Brake areas with him adding his own flair on a few items and doing some other aero mods i'm jealous of (his fenders). Chris was one of the beneficiary's to the suspension development that we used my car to do with MCS. Lots of revisions there to get to where we felt the car was best. Chris has learned a lot of tricks that he shared with me as well. There are now a couple guys in the Atlanta area that are pushing the car really hard, i havent been as involved over the past year, eventually i'll get back into it.
I know Chris His car is awesome, while i was the first guy on this platform to start cutting it up, Chris took my enthusiasm in ruining a perfectly good car and took it to another level. Haha.
Always searching for improvements. You got to Frank it up.
Originally Posted by ZRacerLE
Hey man, you're a YouTube legend at this point so fair game!
I asked that question to see if he had done your suspension, aero, and brake mods. If so, I'd just stop there and learn to get that setup into the 1:29s just like you're buddy. No need for more power or stickier tires when your seconds from the true potential of the car... at least that's my philosophy. I know, too many opinions on the internet, but there's mine. Lot's of potential fun to run down c7 and c8 z06s with only 495hp and a giant set of...
John for me has been on the forefront with the C8 platform and setup for the track. While also willing to share some information with me. More than grateful for that. John is a great driver. I'm 2 seconds from him now and was really coming hard this past weekend with the great temps until traffic and then engine.
Originally Posted by J5isalive
Chris took my blueprint and expanded on it. We have fairly similar mods in the Aero and Brake areas with him adding his own flair on a few items and doing some other aero mods i'm jealous of (his fenders). Chris was one of the beneficiary's to the suspension development that we used my car to do with MCS. Lots of revisions there to get to where we felt the car was best. Chris has learned a lot of tricks that he shared with me as well. There are now a couple guys in the Atlanta area that are pushing the car really hard, i havent been as involved over the past year, eventually i'll get back into it.
Built NA Motor Suggestions
I'd either keep it simple and do a mild cam, headwork and upgraded valve train or just go full retard and do a built 427. I now one is like a $20,000 proposition and the other is double that. Speed cost money, how fast do you want to go? With your existing mods, you should be around 600-630hp properly tuned even with a basic cam/heads/tune build. The only concern reliability-wise I'd have at that point is whether or not the Stingray cooling system could keep pace with 25% more power than stock in a track environment. Probably need some help there.
They offer two flavors: street at 700hp and track at 750hp. But I figure that at $45,000 for openers, they'll figure out the oil pan.
His car is awesome, while i was the first guy on this platform to start cutting it up, Chris took my enthusiasm in ruining a perfectly good car and took it to another level. Haha. 