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Lethal 650 Dyno
Surprisingly, the correction factor was 0% despite the fact it was over 90 degrees when the car was dyno'd; I have always felt like we have a 'conservative' dyno machine. I would have thought the correcion factor would have been something like +2%. Keep in mind that this car has cats, has...- LTHL VPR
- Post #3
- Forum: Viper Racing/Dyno Results/Time Slips
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Adding more BITE to the LETHAL 750!!....
Mash- We are still going to call it the LETHAL 750. Whereas we were constrained by emissions in the first edition, the new enhancements are our attempt at maximizing power without any constraints (will not pass emissions), yet will still retain great drivability. jkracer9- We anticipate great...- LTHL VPR
- Post #6
- Forum: RT/10 and GTS Discussions
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Adding more BITE to the LETHAL 750!!....
Mash- We are still going to call it the LETHAL 750. Whereas we were constrained by emissions in the first edition, the new enhancements are our attempt at maximizing power without any constraints (will not pass emissions), yet will still retain great drivability. jkracer9- We anticipate great...- LTHL VPR
- Post #6
- Forum: Performance Modifications
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Return from APEX
Bob- I noticed that you posted your Dyno numbers. Thanks! Anyone who is interested, see the link below. http://vca1.viperclub.org/ubb/Forum7/HTML/000592.html Although, the peak numbers are truly impressive, we still get even more excited about the additional hp and tq across the entire rpm...- LTHL VPR
- Post #7
- Forum: RT/10 and GTS Discussions
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Auto Exotica cruise (pic)
I was originally anticipating making this event. I wish I was there!! Sounds like it was a blast! We are doing R&D on some additional APEX exclusive engine goodies, intake, and exhaust for the LETHAL 750 package, so I couldn't be there. Once the R&D is finished, I plan on going to the next...- LTHL VPR
- Post #3
- Forum: RT/10 and GTS Discussions
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how hot is too hot ?
To measure the temp correctly, use software that monitors the water temp in the car. Your gauge is not tremendously acccurate, and we have seen a few cars of late that the gauge was definitely off. Better yet.... come down to the shop and we can take a peak at it. I'll be more than happy to...- LTHL VPR
- Post #4
- Forum: RT/10 and GTS Discussions
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Hot air intake vrs cooler air, what is best
We have plenty of evidence that shows how heat around the airbox negatively effects power at the rear. The cooler you can keep the sensors and air, the more power you will generate. We recommend carbon fiber, plastic, or even fiberglas over metal when it comes to airboxes and airflow. Hope this...- LTHL VPR
- Post #9
- Forum: RT/10 and GTS Discussions
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Adding more BITE to the LETHAL 750!!....
Ben- Can't wait to see the monster that Doug's creating for you. He and I have spoken about it,a nd it certainly sounds like it will be amazing. Better hurry up down to the dyno. Looks like one of our LETHAL 750 customers might be adding some nitrous as well. I think the equation goes...LETHAL...- LTHL VPR
- Post #3
- Forum: Performance Modifications
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Adding more BITE to the LETHAL 750!!....
Ben- Can't wait to see the monster that Doug's creating for you. He and I have spoken about it,a nd it certainly sounds like it will be amazing. Better hurry up down to the dyno. Looks like one of our LETHAL 750 customers might be adding some nitrous as well. I think the equation goes...LETHAL...- LTHL VPR
- Post #3
- Forum: RT/10 and GTS Discussions
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Adding more BITE to the LETHAL 750!!....
As most of you know, APEX Motorsports is committed to creating Viper performance packages that maximize power, reliability, and safety. Recently, we announced the LETHAL 750 package, making 650 rwhp and 717 rwtq, perhaps the most powerful naturally-aspirated Viper package ever created to run...- LTHL VPR
- Thread
- Replies: 9
- Forum: RT/10 and GTS Discussions
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Adding more BITE to the LETHAL 750!!....
As most of you know, APEX Motorsports is committed to creating Viper performance packages that maximize power, reliability, and safety. Recently, we announced the LETHAL 750 package, making 650 rwhp and 717 rwtq, perhaps the most powerful naturally-aspirated Viper package ever created to run...- LTHL VPR
- Thread
- Replies: 13
- Forum: Performance Modifications
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Valaya Racing/ Ted May's New Headers!!!
Re: Valaya Racing/ Ted May\'s New Headers!!! Sounds interesting. We will be happy to dyno the car. With a dyno database of over 50 Vipers with all different combinations of headers and mods, it would be interesting to see the comparison. Call us on Tues. at 408.562.1000 to schedule an...- LTHL VPR
- Post #2
- Forum: Performance Modifications
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Valaya Racing/ Ted May's New Headers!!!
Re: Valaya Racing/ Ted May\'s New Headers!!! Sounds interesting. We will be happy to dyno the car. With a dyno database of over 50 Vipers with all different combinations of headers and mods, it would be interesting to see the comparison. Call us on Tues. at 408.562.1000 to schedule an...- LTHL VPR
- Post #2
- Forum: RT/10 and GTS Discussions
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longer wheel studs?
I was working on having some custom studs made a couple months back. Thanks for reminding me. The studs we are working on are slightly over 1/2" longer than stock and are a direct replacement. No drilling of the spindles or any other mods. We were working on these along with our hub-centric...- LTHL VPR
- Post #2
- Forum: Viper Racing/Dyno Results/Time Slips
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Return from APEX
Bob- Great meeting you on Sat.! I thought it was great that you drove your 'new' LETHAL 650 from our shop straight to Utah. Judging by the smile on your face when you felt the increase in power, I trust you had plenty of road to become more accustomed to the feeling of 650 horses! I know your...- LTHL VPR
- Post #4
- Forum: RT/10 and GTS Discussions
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Apex Motorsports battery kit - poll
Our experience has shown that the Optima battery does not clear the frame on most Vipers. Some have ground down the posts; thus voiding the battery's warranty. As I mentioned above, we have tried a few different types of dry cells. What we have found is that, in order to meet the minimum CCA...- LTHL VPR
- Post #6
- Forum: RT/10 and GTS Discussions
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Apex Motorsports battery kit - poll
We will try and get some pics posted shortly. We have installes about a dozen kits so far, including my LETHAL 750. Works great!! Much more cranking amps than stock. Comes with a billet hold down. Be weary of some of the dry cells you speak about. They have a tendancy to have a lower CCA output...- LTHL VPR
- Post #3
- Forum: RT/10 and GTS Discussions
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Idle Hang
Yes, you can use a standard volt meter to measure your TPS. MAP sensor may be more diffcult as usually the measurements are converted into 'real' world numbers. What vacuum measurement are you getting? Since it is recurring every couple hundred miles after restting the computer, it may the the...- LTHL VPR
- Post #10
- Forum: RT/10 and GTS Discussions
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3.55 gears pros and cons??????
What mods do you have? I have seen cars making serious power have a very hard time hooking up, even with the stock gears. Our LETHAL 650 and 750 packages are perfect examples of this. Depending on your goals and power level, you may also want to look at 3.31s or 3.45s. I have the stock gears...- LTHL VPR
- Post #5
- Forum: RT/10 and GTS Discussions
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Idle Hang
First questions: Is your car stock? Have you measured the MAP voltage, TPS voltage, and Vacuum. that's what I would do first. However, I do know that 96-97s have a tendency to hang a little; they have the most aggressive cam of GEN IIs. Don't know how bad yours is though. Even more simple...- LTHL VPR
- Post #7
- Forum: RT/10 and GTS Discussions
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STEVENS CREEK DODGE any good ??
They do great work. Both Viper techs are strong. We recommend them to all of our customers requiring warranty work/service. They are only a couple miles away from our shop. I trusted them to do warranty work on both of my Vipers. Tell Ben or Mike (both Viper techs) HI for me. I would recommend...- LTHL VPR
- Post #2
- Forum: RT/10 and GTS Discussions
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Carbon fiber body kits. Anyone?
I have a fiberglass one; on the cover of the most recent (summer 2002) Viper Magazine. It sounds exactly like what you are describing. However it is fiberglas, not carbon fiber, and it is not that heavy. We offer it as an upgrade to the LETHAL 650 and LETHAL 750 packages and we use PIAA fog and...- LTHL VPR
- Post #2
- Forum: Performance Modifications
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Hugh's Apex Package??
Re: Hugh\'s Apex Package?? Bob- Boy it didn't take long for you to let the cat out of the bag! We were very pleased with your numbers. We tuned your car very conservatively, air fuel ratio under 13.0 at all rpms. Given the fact that your car has only 1500 miles, still has catalytic converters...- LTHL VPR
- Post #10
- Forum: Performance Modifications
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radiator woes . .
It probably makes sense to upgrade the radiator if it needs to be removed anyway. We use the Fluidyne and it works great! I believe we still have one in stock if you are interested. If yuo haven't upgraded the fan assembly on your 97 to the 98+ upgraded one, I would highly recommend this as...- LTHL VPR
- Post #6
- Forum: RT/10 and GTS Discussions
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Hugh's Apex Package??
Re: Hugh\'s Apex Package?? Thank you all for your continued support. We are anxious to get Hugh's and Bob's Vipers back to them. Other 650 and 750 customers are ready and waiting!!! Hugh has been patient and great to work with! As he indicated, his Viper was more of a 'special project' since...- LTHL VPR
- Post #6
- Forum: Performance Modifications
