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  #49  
Old 06-17-2014, 01:07 PM
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Re: Almost GO TIME...Ripp supercharger inhand and ready for install

Another thing, the RIPP kit has a Vortech SC which is a centrifugal type SC, not a roots/twin screw style SC like are provided on cars from the factory (for instance, the Shelby or old Grand Prix GTPs). In general, roots style SCs deliver more torque down low and trail off up top whereas centrifugal style SCs are more like a turbo, they're going to be better at mid-higher RPM levels than a roots SC and the power will be more linear once it comes on full, not nearly as good at low RPM levels.

Roots/twin screw SCs are positive displacement, meaning they are creating the air being forced. Centrifugal SCs are like turbos, meaning they are sucking in the air and pushing it to the outside of the rapidly spinning impeller blades (that is a verrrrrry simple explanation). Thus, it must "spool" like a turbo. It's just being driven by a belt/shaft instead of exhaust gases.

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  #50  
Old 06-17-2014, 02:59 PM
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Re: Almost GO TIME...Ripp supercharger inhand and ready for install

^In other words these Jeeps need a big ass turbo.
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  #51  
Old 06-17-2014, 03:31 PM
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Re: Almost GO TIME...Ripp supercharger inhand and ready for install

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Originally Posted by phillysrt View Post
Not to be a downer at all. Love what your doing and excited to see when you have it fully dialed in but there are guys including myself getting sub 4 sec 0-60 with no SC. Weren't you hoping for like a 3.2 3.4 or something like that?? Or there still more dialing in needed??? Either way I can't wait to see some videos when it's completed


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I think something people forget with the low NA Jeep times, on the 14s at least, is that they are due to low DA. Bring your Jeep doing a 3.8 to Houston right now and it's going to run a 4.8 on low gas and no passengers. Bring that SC jeep to Houston and it will still run the same sub 4 second 0-60. It will also run a much better 1/4 mile.

In addition. I also agree on the power up top. When I race people I smoke them to 60 and then they're gone. In particular all of the AMG mercedes, not including their new AWD E63S.
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  #52  
Old 06-17-2014, 03:50 PM
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Re: Almost GO TIME...Ripp supercharger inhand and ready for install

^^^^i agree I can't crack 5 seconds in Dallas.
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  #53  
Old 06-17-2014, 03:53 PM
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Re: Almost GO TIME...Ripp supercharger inhand and ready for install

^ In the "winter" I'm doing consistent 4.0 - 4.3 regardless of weight. Summer I'm doing 4.8-5.2. 4.8 has to be on low gas and no passenger. Occasionally I'll squeeze out a 4.6 or 4.7. Now that I'm broken in, part of it could be the tires. I have 14,000 on the Verdes and they spin a lot now.

Low humidity for us in Houston is 50 or 60% lol.
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  #54  
Old 06-17-2014, 04:29 PM
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Re: Almost GO TIME...Ripp supercharger inhand and ready for install

Quote:
Originally Posted by Schleprock View Post
Why is the focus on the 0-60 performance? What's the 30mph plus performance? IMO, that's what is more important here. How hard is the truck pulling/feeling during normal driving when you punch it? You're power and pull should feel just as much, or more, at driving speeds than just the lower speeds/starting. There is only so fast a 5200lbs+ vehicle can go off the line so decreasing the take off times is going to reduce at a much more difficult rate. Yes there was a good amount of WHP added, but you are still launching a heavy vehicle from a stand still. The 0-60 time here may not even be an engine issue, could it not be transmission/gearing hindrance?

It's pretty tough for my Shelby to take either of my SRT's 0-60mph even though it has nearly 200hp more, but if you go any interval above 25-30mph, it'll be bloody. Once that engine opens up and boost is flowing it's rocket ship time. The 6.4L is a very finicky engine to modify, I'm not surprised at all that the increase in power isn't drastically lowering the 0-60 time. I could see there being a 0.5-1 second lag where that new power is even being used, whether that be due to boost building and being used by the engine or the tranny/diff putting it to the ground, which would reduce the impact of it cutting 0-60 times. But I could see it being much more beneficial at higher RPMs and speed in laying down the hammer. In fact, my desire for an SC is for that purpose. Harder, faster pull at pace rather than from a dead stop. The truck already does that great compared to even most sports cars, I think the truck needs more power in the mid and higher RPMs.

I wouldn't say that the performance is being based on a 0-60 it's just the easiest way to measure. Yes the truck definately pulls harder in the 30mph plus range than it did before but how much harder ...really know way if knowing. I am only using the 0-60 times thru the EVIC as my baseline for before and after comparisons on performance with the supercharger because it's a consistent variable that I have a way of measuring as opposed to the 30mph pulls you mentioned. The real all around test would have been to compare 1/4 mile times before and after where you get both the launch and the upper mph pull all in one. Unfortunately where I live there isn't anywhere I can launch from stand still and let out of it at 110mph+ and I didn't have time to get to the track before the supercharger was added.


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  #55  
Old 06-17-2014, 07:07 PM
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Re: Almost GO TIME...Ripp supercharger inhand and ready for install

Quote:
Originally Posted by 5000XD View Post
^In other words these Jeeps need a big ass turbo.
Not really, the bigger the turbo the more the lag down low. Your ability to create more boost and higher horsepower goes up with a bigger turbo, but a bigger turbo requires more air flow, exhaust gases, and spool time, thus your off-the-line power will be even lower unless you are set up for drag racing and can brake boost the turbo before launch. That puts a lot of force on the transmission and diff though.
Quote:
Originally Posted by Mikes14srt View Post
I wouldn't say that the performance is being based on a 0-60 it's just the easiest way to measure. Yes the truck definately pulls harder in the 30mph plus range than it did before but how much harder ...really know way if knowing. I am only using the 0-60 times thru the EVIC as my baseline for before and after comparisons on performance with the supercharger because it's a consistent variable that I have a way of measuring as opposed to the 30mph pulls you mentioned. The real all around test would have been to compare 1/4 mile times before and after where you get both the launch and the upper mph pull all in one. Unfortunately where I live there isn't anywhere I can launch from stand still and let out of it at 110mph+ and I didn't have time to get to the track before the supercharger was added.
I agree, that is the best measure of performance one could probably have right now other than a person riding shotgun with a laptop data logging and analyzing engine numbers.
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  #56  
Old 06-18-2014, 07:42 AM
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Re: Almost GO TIME...Ripp supercharger inhand and ready for install

Quote:
Originally Posted by Schleprock View Post
Why is the focus on the 0-60 performance? What's the 30mph plus performance? IMO, that's what is more important here. How hard is the truck pulling/feeling during normal driving when you punch it? You're power and pull should feel just as much, or more, at driving speeds than just the lower speeds/starting. There is only so fast a 5200lbs+ vehicle can go off the line so decreasing the take off times is going to reduce at a much more difficult rate. Yes there was a good amount of WHP added, but you are still launching a heavy vehicle from a stand still. The 0-60 time here may not even be an engine issue, could it not be transmission/gearing hindrance?

It's pretty tough for my Shelby to take either of my SRT's 0-60mph even though it has nearly 200hp more, but if you go any interval above 25-30mph, it'll be bloody. Once that engine opens up and boost is flowing it's rocket ship time. The 6.4L is a very finicky engine to modify, I'm not surprised at all that the increase in power isn't drastically lowering the 0-60 time. I could see there being a 0.5-1 second lag where that new power is even being used, whether that be due to boost building and being used by the engine or the tranny/diff putting it to the ground, which would reduce the impact of it cutting 0-60 times. But I could see it being much more beneficial at higher RPMs and speed in laying down the hammer. In fact, my desire for an SC is for that purpose. Harder, faster pull at pace rather than from a dead stop. The truck already does that great compared to even most sports cars, I think the truck needs more power in the mid and higher RPMs.
YES/NO - we cannot agree any more with the focus on performance, but not it getting slower- WE ARE TRYING TO KEEP THINGS SAFE. Mopar has a bad rap for blowing stuff up and we're coming out swinging saying we can keep it safe, powerful and fast. THIS IS Safe Powerful and fast - We will not push the power management any further at this time - It gets ugly and its not worth risking the entire program in its infancy for .3 secs.... We are right there with a 125 shot of NOS without the hassle and or worry of a NOS back-fire.

CAN WE ALL AGREE THAT: We (RIPP Clients) need to all collectively be on the same page before we start tuning individual vehicles?

So far 3 RIPP SRT's producing 550whp-/+ on average with no knock counts, no check engine lights and 0-60 is 3.5-3.7sec's. The variable of slipping the converter to the point it melts is ill advised by the higher ups at Diablo. We'll leave that to someone else to explore. Our responsibility is to provide a clean safe kit our clients can all enjoy.

There is plenty of time to push the limits as this kit gets legs and spreads out to multiple clients. What good is .3 secs faster 0-60 and blown (whatever)... ?

Questions welcome,

RIPPTECH
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  #57  
Old 06-18-2014, 08:22 AM
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Re: Almost GO TIME...Ripp supercharger inhand and ready for install

I will be very happy with a 3.5 - 3.7 0-60. I am located a few miles south of Woodbury in New Jersey. My next step is to find someone to do the install. My preference is RIPP themselves - or perhaps ..... Mike, is this something you would do? After all, you have the experience....I would benefit from your expertise and attention to detail, and you would gain gas money (a LOT of gas money LOL).

One question - I have only 500 miles on my Jeep - is this number too low for the install?
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Old 06-18-2014, 03:54 PM
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Re: Almost GO TIME...Ripp supercharger inhand and ready for install

Quote:
Originally Posted by waterlemon View Post
I will be very happy with a 3.5 - 3.7 0-60. I am located a few miles south of Woodbury in New Jersey. My next step is to find someone to do the install. My preference is RIPP themselves - or perhaps ..... Mike, is this something you would do? After all, you have the experience....I would benefit from your expertise and attention to detail, and you would gain gas money (a LOT of gas money LOL).

One question - I have only 500 miles on my Jeep - is this number too low for the install?
Yes, too low. We recommend waiting until after 2500 mi.
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  #59  
Old 06-18-2014, 05:11 PM
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Re: Almost GO TIME...Ripp supercharger inhand and ready for install

Dear RIPP, Happy to order one but I'm in Oz + RHD (did you get the pics I sent?). Should we wait for a few more "local" US installs to be done or are you confident it is right to ship for OS customers?
Thanks
Nathan
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Old 06-18-2014, 06:34 PM
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Re: Almost GO TIME...Ripp supercharger inhand and ready for install

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Originally Posted by jmone View Post
Dear RIPP, Happy to order one but I'm in Oz + RHD (did you get the pics I sent?). Should we wait for a few more "local" US installs to be done or are you confident it is right to ship for OS customers?
Thanks
Nathan
+1

Well done jmone. You took the words right off of my fingertips!
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