What are my options after a rod bearing failure

[Mikey]

It would be great if you can get pictures of the rebuild....just for the cool factor to see all the internals/machining. Engine porn.

That's actually what I JUST asked, I know he's busy but hopefully he can send some update pics throughout the 5 weeks

[Sniper]

Do you mind sharing what this is going to cost to compare it against Prefix?

[Mikey]

Do you mind sharing what this is going to cost to compare it against Prefix?

Viper exchange was going to be about 30k minimum. Prefix for a stock rebuild would be about 20k out the door to rebuild pull and install, cheaper depending on what's salvageable. I'm going to be about 25k out the door when you include the engine pull, installation, and headers

Kevin does everything custom so he can build according to your needs, the others have a "kit" and what you get is what you get

[Sniper]

For just a heads/cam at Prefix, I was quoted $20900. How are they doing a rebuild for $20000?

[Mikey]

For just a heads/cam at Prefix, I was quoted $20900. How are they doing a rebuild for $20000?

16.6 with Kevin. Because he does his own machining and it's custom. Prefix sells a kit

[SRT_BluByU]

For just a heads/cam at Prefix, I was quoted $20900. How are they doing a rebuild for $20000?

reusing most of the stock parts must be similar in cost to a pair of new heads and cam.. engine come out either way.

[Mikey]

reusing most of the stock parts must be similar in cost to a pair of new heads and cam.. engine come out either way.

I'm getting new and improved parts with the exception of the crankshaft and the heads

[SRT_BluByU]

I think he was asking about the Preifx quote you posted..

[Gen5snake]

For just a heads/cam at Prefix, I was quoted $20900. How are they doing a rebuild for $20000?

I'd imagine Prefix has a huge markup as most Viper work/parts do...silly markup...but it's low volume...you have to make your money somehow. I'm used to the days of doing a heads/cam swap on a mustang for under $2k. The thought of heads/cam for $20k is insane....and I believe they use your heads.

[13COBRA]

I'd imagine Prefix has a huge markup as most Viper work/parts do...silly markup...but it's low volume...you have to make your money somehow. I'm used to the days of doing a heads/cam swap on a mustang for under $2k. The thought of heads/cam for $20k is insane....and I believe they use your heads.

The big difference is there aren't many shops that will do it/can do it in a Viper.

[Mikey]

I'd imagine Prefix has a huge markup as most Viper work/parts do...silly markup...but it's low volume...you have to make your money somehow. I'm used to the days of doing a heads/cam swap on a mustang for under $2k. The thought of heads/cam for $20k is insane....and I believe they use your heads.

I THINK prefix uses CNC heads, which is another 4k. Kevin is using my existing heads. He said my heads will get me about 80% to what CNC heads will

The price is definitely nauseating, I'll be hell bent if I let this car go cheap in the next 2 years

[StrokerAce]

The big difference is there aren't many shops that will do it/can do it in a Viper.

Why is that though? It's a V10 but it's a pushrod 2V/cylinder engine.

[Old School]

Why is that though? It's a V10 but it's a pushrod 2V/cylinder engine.

I have a friend with a machine shop. He won't touch anything that's not mainstream, too much liability.

[13COBRA]

Why is that though? It's a V10 but it's a pushrod 2V/cylinder engine.

They just won't. It's foreign to them...they don't want to do mess it up and buy an engine.

I get it.

[Fulltilt]

It's risk vs reward. Would you want to touch something your unfamiliar with and net roughly the same profit as something you see on a daily basis? My buddy Tim builds engines and one of his big complaints in the past was finding a quality machine shop. I know he went through several before finding someone he trusted.

[Mikey]

Any of you have a dash cam in your cars? I have one still sitting in the box, but I'm hesitant in the chance that's it's used during my spirited drives

[Gen5snake]

Any of you have a dash cam in your cars? I have one still sitting in the box, but I'm hesitant in the chance that's it's used during my spirited drives

I understand your hesitation. It's a double edge sword. My BMW has cams built in all around the car. If it senses that someone hit me/collision, all cameras will start recording (20 seconds prior to collision...I guess they're constantly recording). I can also get a 360 view of anyone around me when it's parked. The problem with these OEM cameras, it logs all the cars metrics while recording. It's great until I do something stupid. If I use the cameras and get into an accident, I have to allow the authorities access to the videos if requested (a part of the user agreement). That's the not so cool part.

Last week some guy in another forum posted a hit and run. Someone sideswiped him, took off and he was able to get the guy's plate. I have mine on...and they're built in. If something happens with yours, there's nothing stopping you from removing it and shoving under your seat. No one will know it was there.

[TKO MOTORSPORTS TEAM]

Any of you have a dash cam in your cars? I have one still sitting in the box, but I'm hesitant in the chance that's it's used during my spirited drives

All cars since approx 1995 have data built in thats shows everything. If they really wanted to pinch you they could just plug into the data port and nail you right there or even pull GPS data from your phone. Good news is the standard bureaucratic government aint that smart yet, If your on the NSA watch list then maybe be a little worried. Your local authorities have much bigger problems to worry about then camera footage of a tax paying citizen doing speed runs on some lonesome back roads.

[Gen5snake]

Here are some pictures of our stock heads. They CNC machine the combustion chambers and valve throats. The intake and exhaust runners appear to be untouched, but are very smooth. It looks like they also CNC port match the intake runner...only about a 1/4" deep. I can see how you can benefit from additional porting. Both intake and exhaust runners can be massaged in addition to the valve guide boss.


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[Old School]

s-l1600 (2).jpgs-l1600 (1).jpg

This is obviously a "bang for the buck" CNC porting approach. 80% of the possible improvement is found within the 20% of the port closest to the valve seat.

[Gen5snake]

This is obviously a "bang for the buck" CNC porting approach. 80% of the possible improvement is found within the 20% of the port closest to the valve seat.

Yep a good bang for the buck. Some people think polishing the intake and exhaust runner surface helps flow, in fact it has very little effect on flow as you see Velocity = 0 at the wall. See below velocity profile in a pipe. You can see gains if they reshape, open up or re-position the runners....it all depends on the needs of the engine...that's why I'm sure the ported heads cost mucho $$ on these things...R&D time and low demand.


download.png

[Mikey]

And we're off!

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53889.jpg

[GTS Dean]

All cars since approx 1995 have data built in thats shows everything. If they really wanted to pinch you they could just plug into the data port and nail you right there or even pull GPS data from your phone. Good news is the standard bureaucratic government aint that smart yet, If your on the NSA watch list then maybe be a little worried. Your local authorities have much bigger problems to worry about then camera footage of a tax paying citizen doing speed runs on some lonesome back roads.

These are Crash Data Recorders that lock the OBD data stream from several seconds before, to several seconds after an airbag deployment crash pulse. Several inputs - speed, brake application, steering angle, G, etc. - are written to non-volatile memory . At least in Texas, the CDR cannot be downloaded except by court order and there is a chain of custody for the release of data. This is usually introduced as evidence in the event of serious injury or death in the crash. Perhaps newer applications have a downloadable datastream, but the buffer would have to be very large because it reads new data coming in and drops old data off the back end as long as the key is on and engine is running.

Best defense to all of that is to drive a car with a carb and magneto ignition with no cameras.

[Old School]

According to this list, only Gen5's have Crash Data

http://www.crashforensics.com/files/CDRVehicleList.pdf

[Mikey]

Yep a good bang for the buck. Some people think polishing the intake and exhaust runner surface helps flow, in fact it has very little effect on flow as you see Velocity = 0 at the wall. See below velocity profile in a pipe. You can see gains if they reshape, open up or re-position the runners....it all depends on the needs of the engine...that's why I'm sure the ported heads cost mucho $$ on these things...R&D time and low demand.


download.png

Would valve work see a good amount of gains? I know my builder mentioned he has a rottler in house and usually doesn't port unless he's doing high compression large cam builds as he can get you about 80% there without a pair of CNC heads