Fastest top speed any distance

[DEMO MAN]

What modifications did you have on your 06 Viper to go that fast.??[/QUOTE]


The mods are extensive but they are all pretty much mechanical, the body is stock 06 coupe with no mods to it. We do remove wipers, mirrors and tape the seams to make the air flow over the car better. The taller rear tires also require a little more rake in the car for clearance. I probably spent more on safety than I did on going fast which in my opinion is how it should be done. I will say that maybe the car is approaching it's limit without some aero work to keep the back happy at bigger speeds. It does start to dance about a bit after 250 and may need a little downforce for bigger speeds. Unfortunately downforce is not condusive to going fast so it's a delicate balance to find the right combination. We are working on a few things to help with that and maybe a trip to a wind tunnel to confirm.

[DEMO MAN]

Not if you pull the tranny and ship it up to John Donato assuming he is still in business. He can ball peen the parts; turn it into a true six speed; and, eliminate most of the ngr. I had it done to my former supercharged Gen III. John did a fabulous job. It is a must if you are doing standing mile events since with the OEM six speed with overdrive, the lower overdrive RPMs cause the car to start to crap out at 165 MPH and creeps up from there. With the conversion, you pick up some significant speed.

I am running a very modified T56 with some special 5th/6th gear ratios to close up that big spread on stock transmissions. I finished that run in 6th gear and although we had issues they weren't related to the transmission. The car is gear capable of mid 270s and we expected a bigger number then the 252 but other issues kept us from getting there. I was looking for a mid 260s speed and felt that I could have done that if everything had worked as planned like that ever happens. It's not suppose to be easy I suppose so back to work to fix that issue and see what comes next.

[DEMO MAN]

I got some more pictures so I thought I would post some of them up.

Shuttle and Viper.jpg
GT and Viper.jpg
Heading toward 250 Plus 2.jpg
Working on Issues.jpg

[DEMO MAN]

This is probably one of my favorite pictures, 43 seconds after this one was taken I crossed the 250 MPH mark and 56 seconds later I crossed the timing lights at 252.588 MPH. I'm still on a bit of a high from it all, I definitely can't thank those who put all the effort into the car enough and thanks to all of you guys for the support and advice I received. I know I had the easy job considering my part was over in less than a minute. Hope in the future I get to make another attempt at a bigger speed, the car is capable of a lot more and I'm willing to crawl in it for another pass.
About to Set a New World Record.jpg

[USAFPILOT]

GT just isn't as mean looking as the Viper! bad ass

[Matt Dillon]

GT just isn't as mean looking as the Viper! bad ass

Even though I have 2 Vipers I guess this is just a Personal Opinion! Especially depending on WHAT Year you're talking about.

[DEMO MAN]

Anyone have any experience with alcohol fueled TT Viper? I'm considering some options to help with my next attempt at some big speed and want to explore anything that could help with making a 275+ MPH pass in early 2021. The car is gear capable and we are going to refresh the motor and make a few more mods that will bump the WHP and torque. Open to any thoughts, ideas or suggestions you guys may have. Thanks, David

[Matt Dillon]

Anyone have any experience with alcohol fueled TT Viper? I'm considering some options to help with my next attempt at some big speed and want to explore anything that could help with making a 275+ MPH pass in early 2021. The car is gear capable and we are going to refresh the motor and make a few more mods that will bump the WHP and torque. Open to any thoughts, ideas or suggestions you guys may have. Thanks, David

I know this is an Old thread but I'd love for you Demo Man to keep us informed when you're going to try it again, God Speed & GL!

[DEMO MAN]

I know this is an Old thread but I'd love for you Demo Man to keep us informed when you're going to try it again, God Speed & GL!

Thanks Matt and we are already starting to prep car for what we hope will be a much bigger speed. The upgrades will include more WHP/torque of course along with some aero, gearing, brake and tire mods. The engine will be pulled soon and we are going to refresh it and make some additional mods along with converting it to E85/E98. The car is currently gear capable of mid 270s although it's a bit of a handful in those upper ranges. I want to keep it street legal as that's part of the overall goal the team started with. I believe we will be ready to make another attempt in 2021 provided the world gets back to normal before then. I will keep you guys informed as we progress toward the new goals

[DEMO MAN]

Well this week we started laying out the plans for replacing the air to air intercooler with a water to air system. The air to air wasn't capable of keeping the IATs in check toward the end of the run and cost us a lot of speed. I had expected a run in the 260s but the engine management system began to pull boost, fuel, timing etc as the temps increased. We are mocking up the placement of plumbing, intercooler cores, piping etc and then will fab and install once everything fits properly. We will also be installing an ice box/pump in the car and haven't yet determined the capacity of it but expect it to be over 5 gallons including the feed lines and cores. We also are doing additional improvements to the engine, replacing the transmission, adding better safety features, and putting together a wheel/tire package to withstand the temps/speed I expect to reach. When it's all done provided my math skills haven't failed me Blucifer will be gear capable of speeds in the 280s although 275 has a nice sound to it. We are going to shorten the distance for the run drastically this time although it's still just above a mile. I will post pictures and discuss the new build as it progresses toward the next attempt.

[ACRSNK]

Great write up! Love the fact that cars bring people together and can bring happiness in the toughest of tough times.

[MAMBA FANGZZ]

Can't wait to see the 275...

[Grcforce327]

????

ttvUntitled.jpg

[MAMBA FANGZZ]

280mph? Where was this officially clocked and recorded? That would be all over the web....What type of trans & hp?

[DEMO MAN]

Ballista Twin Turbo is a very similar setup to what Blucifer is, we both run a 3.07/3.08 differential, we both ran a highly modified G Force built T56 with custom 5th and 6th gears, I'm assuming we ran similar tire sizes since the wheel wells will only accommodate so much rubber back there, even the engine build are very similar. Now that being what it is, you would have to spin the engine to a sustained 7750 RPM to break 280 MPH which I suppose is possible if you really had a ton of confidence in that massive chunk of metal holding together at that RPM but probably unlikely. What I find even more interesting is that when BJ Motors was selling the Ballista Twin Turbo the ad bragged about it having enough HP and gearing that it was capable of 350 MPH...........let that sink in for a minute. Just a quick calculation on that is it takes 9700 RPM to hit 350 MPH, I would like to see a Viper engine that can hold together at 9700 RPM sustained for the long period of time it would take to go the miles and miles needed to get a Viper to 350 MPH. ART and Todd did a fantastic job with Ballista and the engineering is first class in that car, both impressive speeds and impressive car. For me I know the struggle and effort to setting a goal and working toward it and the set backs and misery that comes with that task, I may not make it to 275, but at some point some Viper will and I will be proud to see it happen even if it's not me. After seeing Aaron's Juggernaut build and watching Sal's Viper run an insane half mile I know I need to put some more effort into this before these guys are doing 275 in the half. David

[TrackAire]

Ballista Twin Turbo is a very similar setup to what Blucifer is, we both run a 3.07/3.08 differential, we both ran a highly modified G Force built T56 with custom 5th and 6th gears, I'm assuming we ran similar tire sizes since the wheel wells will only accommodate so much rubber back there, even the engine build are very similar. Now that being what it is, you would have to spin the engine to a sustained 7750 RPM to break 280 MPH which I suppose is possible if you really had a ton of confidence in that massive chunk of metal holding together at that RPM but probably unlikely. What I find even more interesting is that when BJ Motors was selling the Ballista Twin Turbo the ad bragged about it having enough HP and gearing that it was capable of 350 MPH...........let that sink in for a minute. Just a quick calculation on that is it takes 9700 RPM to hit 350 MPH, I would like to see a Viper engine that can hold together at 9700 RPM sustained for the long period of time it would take to go the miles and miles needed to get a Viper to 350 MPH. ART and Todd did a fantastic job with Ballista and the engineering is first class in that car, both impressive speeds and impressive car. For me I know the struggle and effort to setting a goal and working toward it and the set backs and misery that comes with that task, I may not make it to 275, but at some point some Viper will and I will be proud to see it happen even if it's not me. After seeing Aaron's Juggernaut build and watching Sal's Viper run an insane half mile I know I need to put some more effort into this before these guys are doing 275 in the half. David

I remember seeing that ART Viper at the Viper Owners Meeting in Salt Lake City. IIRC, the car was running near the 240 mph range but not sure as that was like 10 years ago. Going from 240 mph to 280 mph is literally twice as tough.

Keep on with the build, the amount of work and hp it takes for the speeds you're running is insane. Looking forward to you hitting 275 mph.

[DEMO MAN]

I remember seeing that ART Viper at the Viper Owners Meeting in Salt Lake City. IIRC, the car was running near the 240 mph range but not sure as that was like 10 years ago. Going from 240 mph to 280 mph is literally twice as tough.

Keep on with the build, the amount of work and hp it takes for the speeds you're running is insane. Looking forward to you hitting 275 mph.

Thanks TrackAire, we are neck deep in wrenching on it with mods to intercooler, heads, transmission, wheels and tires not to include the tuning. It's always a struggle to reach that next goal which makes it even more satisfying when it happens. You are 100% on target with "Going from 240 mph to 280 mph is literally twice as tough". I have heard so many times " it's only 22 more MPH to 275, that will be easy "...........ok, if you say so.

[TrackAire]

Demo Man,
Can you verify what specific model tires you use for these top speed runs?

[DEMO MAN]

Demo Man,
Can you verify what specific model tires you use for these top speed runs?

I will use the same tire the Koenigsegg Agera RS used, which is Michelin Pilot Sport Cup 2 tires. They took them to 280 plus without any issues and everything I read regarding that seem to indicate that they were capable of that speed and more.

[TrackAire]

Hard to argue with Michelins when you see this kind of abuse they can take:

https://www.youtube.com/watch?v=ryDZhDPaYdo

[rgrhorton]

Just joined the forum yesterday and this thread was a great read. Congrats Demo on your accomplishment. I hope the team enjoyed those M&M's. =)

[James]

This thread is a fantastic read. Thanks for sharing in detail all the work you put into Blucifer. I keep my fingers crossed for you guys and your future endeavours in increasing the top speed.

[DEMO MAN]

Thanks rgrhorton and James, we are working toward the next attempt at some big speed. The heads are pulled to be reworked along with some other components. We are designing the water to air intercooler to keep the IATs down for this attempt. In addition to those items there is a lot of other work going on from the transmission to some aero to keep that big Viper butt from dancing left and right quite so much at speed. We are doing some more safety upgrades as every mph adds risk and it's always best to be prepared for it and hope it's never needed. Here are a few pics of the current state of the car, I think the best option is to open the top of the engine and just pour in about 600 more WHP and see what happens.

Blucifer 275 Prep Work 1.jpg
Blucifer 275 Prep Work 2.jpg

[TrackAire]

Maybe time to start looking at some sort of version of a drag wing for minimum resistance but added stability....something like this:
https://www.lgmotorsports.com/lg-c7-drag-wing.html

A mini splitter on the front to keep the air flow attached to the flat under body would probably help too.

Lastly, putting some sort of spats on the front half of the front well arch opening will help keep that tire from upsetting the air flow down the side of the car.

As I'm sure you know...anytime you are doing any aero mods at the speeds you're traveling, you have to take baby steps because the energy that is acting on the car is so huge and even little things can cause big changes, sometimes negative.

Looking forward to see what you come up with.

[DEMO MAN]

Maybe time to start looking at some sort of version of a drag wing for minimum resistance but added stability....something like this:
https://www.lgmotorsports.com/lg-c7-drag-wing.html

A mini splitter on the front to keep the air flow attached to the flat under body would probably help too.

Lastly, putting some sort of spats on the front half of the front well arch opening will help keep that tire from upsetting the air flow down the side of the car.

As I'm sure you know...anytime you are doing any aero mods at the speeds you're traveling, you have to take baby steps because the energy that is acting on the car is so huge and even little things can cause big changes, sometimes negative.

Looking forward to see what you come up with.

We definitely are taking baby steps on the aero, a very small vertical plate located at outer edges of hatch near the rear, and a diffuser that's a little taller and longer than stock. I'm keeping some downforce on the rear of the car with the rake we run, the front is beyond planted but that rear sometimes has a mind of its own over 240 plus. Hopefully we are able to tighten that up some with these changes. For the most part as long as the car is pushing the air it's relatively stable but let it become static, then the air starts pushing back and the fun begins. It's a very fine balance between downforce, speed, stability etc, I'm making those little changes to help keep the car happy and everything working together. It's coming together, soon I will be strapping in Blucifer and watching over the hood at the runway coming at me.