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Testing my RIPP Supercharged Durango

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ripp supercharged supercharger tune
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28K views 42 replies 12 participants last post by  RIPPWK2  
#1 ·
Installed my RIPP Supercharger kit recently and gave it a quick test. not really happy with these numbers. i've also noticed the Boost gauge does not exceed 4psi. I tried both RIPP Tune and a Custom Tune. looking forward to read your suggestions :confused:

Test Race (vs Jeep SRT)

0-60 Time


1/4 Mile Time
 
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#3 ·
That and it needs better Tuning
STEVE
 
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#4 ·
I have heard tuning issues with the Ripps. But those numbers are basically stock numbers.
 
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#11 · (Edited)
Stock numbers are 0 to 60 in 6.6 seconds and a 15.0 flat in the 1/4 mile. It's almost a full second faster than stock, but those numbers are still an an improvement. They could be better. This Durango with a Whipple does the 1/4 in 13.2 at 104 mph which is about 4.6 to 0 to 60, so your Durango should equal or get close to those numbers.

 

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#5 ·
They are not stock numbers whatsoever. I dont care what your on board stuff is telling you, you are not running that time in 1/4 mile with your ride on a track.
he has minimal gains for sure and you can hear its not building boost or not getting enough fuel
I would have it DYNO Tuned to get it right.
STEVE
 
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#8 ·
No not 1/4 mile time but 0-60 is very close to stock. 1/4 should be in the low to mid 13's with this setup and 0-60 should be way lower then that. Like you said it seems like a boost issue where it isn't building it.
 
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#6 ·
is there an easier way to find leaks other than tester kit ? something like spray ?
 
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#7 ·
One more thing, how to remove the transfer case ? we have 4 dynos in twon, all of them are single runners
 
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#9 ·
You could get a Tazer and turn it to RWD.
 
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#12 ·
I am just saying from my own car basically stock and running 6 flat and also at times I have had low 5's on a really good cold day.
 
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#13 ·
Looks like i have two issues, my Tuner confirmed that the engine belt slips, and cannot be tightened any further. and RIPP is suggesting that my headers is causing huge boost loose. and wants me to purchase a bigger pulley.
 
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#15 ·
Yeah that is not the answer...
I AM CALLING BAD TUNER
PAY either HEMIFEVER OR JOHAN MENGS ( DIABLOTOONA) A FEE TO REVIEW AN EMAIL LOG YOU SEND THEM OF HOW ITS RUNNING
I'LL bet they can find something just looking at a log and possibly adjust tune via email (not best way but not much choice)
Good Luck
 
#16 ·
Yup i worked with Johan before he is excellent. i'll drop him a message
 
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#19 ·
Tested the leaks last week there was nothing.
Finally bought a smaller pulley from RIPP (3.25") instead of the original (4"), also spoke with Johan he is waiting me to install the pulley first.
 
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C
#20 ·
Excellent, you're narrowing it down.
I do remember installing a whipple on a marine GM big block and after installing headers we too lost boost.
We had to install a smaller pulley to get the boost back up, but the upside was the engine made more power and the boat gained speed over the stock exhaust manifolds.
So if the belt isn't slipping you will be good to go soon.
 
#23 ·
i hope you're right, i bought the new pulley anyways, waiting to be shipped :)
 
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#21 ·
Unless somehow your intake and exhaust valves are open at the same time headers aren't losing you any boost. Since the Hemi is an OHV and nobody makes a cam with lobes that would do that it ain't the issue.

Sounds like a tighter belt is in order, and a boostier pulley won't hurt
 
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#24 ·
i tried to explain the same thing to my tuner, but he insisted :confused:
 
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#25 ·
I installed the headers and the supercharger at the same time.

I bought another belt that is compatible with the new pulley (3.25")
 
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R
#27 ·
So a blower or super charger needs some sort of back pressure to build boost. iE the stock exhaust. Now when you add long tube headers or a better flowing exhaust you lose back pressure aka boost but the engine can breathe easier. To make up the 1-2 IBS boost lost you would go with a smaller pulley.

Belt slip is a problem that some super chargers fight and others don't. Easy way to tell is look for black belt dust.
 
#28 ·
That's not how it works at all.... You're forcing more air into the cylinder when the intake valve opens. The exhaust valve is shut at that point. And it's not back pressure, it's exhaust scavenging. A properly designed exhaust will have no more than 2psi at absolute max of back pressure.

Sent from my SM-G935T using Tapatalk
 
R
#30 ·
[/QUOTE]
That's not how it works at all.... You're forcing more air into the cylinder when the intake valve opens. The exhaust valve is shut at that point. And it's not back pressure, it's exhaust scavenging. A properly designed exhaust will have no more than 2psi at absolute max of back pressure.



Yet in the same sentence you said it's not back pressure and it is. Wow good job there stud.
a blower needs some back pressure to help build boost. If you go with a free flowing exhaust then you have to spin it faster to make up for the loss.

That simple don't over complicate it.
 
#31 ·
That's not how it works at all.... You're forcing more air into the cylinder when the intake valve opens. The exhaust valve is shut at that point. And it's not back pressure, it's exhaust scavenging. A properly designed exhaust will have no more than 2psi at absolute max of back pressure.



Yet in the same sentence you said it's not back pressure and it is. Wow good job there stud.
a blower needs some back pressure to help build boost. If you go with a free flowing exhaust then you have to spin it faster to make up for the loss.

That simple don't over complicate it.[/QUOTE]

What? The supercharger builds up pressure against the exhaust valves which are closed at that point and return as much pressure as the blower puts into it. Exhaust scavenging is the exhaust system's ability to evacuate exhaust gases.

Skippy's right
 
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#33 ·
Reddragonwagon is correct.
You will lose boost in a turbo car as well if you bolt on a much freer flowing exhaust system than say a stock system.
I would lose around 3 psi going from the stock 2 1/4 exhaust w/cat to a full 3" exhaust no cat on a turbo 4 banger.

These supercharger kits are designed for stock exhaust...you bolt on higher flowing exhaust system and you're going to lose boost.
Not saying you lose power...but boost will be lower.
 
#34 ·
I went today to another Tuner and had it tested before decide either to change the pulley or keep the 4".

in fact, he is the 5th guy to speak about back pressure but however, using HPTuner he managed to increase the boost to 6psi and get an output of 416awhp

we decided not to change the pulley as we expected the boost to exceed 13psi with the 3.25" one. this may break the engine as he already observed some knocks.

The back pressure is an existing factor that i have always said its not true ( since the valves are shut ). im not really good at mechanical physics, but the test done today shows its true.

ill be changing the pulley however in future but i want to make sure i can minimize the engine rpm to stay at the safe side.
 
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#35 ·
6.508 psi to be specific :)
 
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#38 ·
Lets face we all are not perfect with this otherwise we would all be doing it for a living. The ideas of freeing exhaust up means you can add more on teh other end to make a Bigger Pump.
The concept of the engine just being a pump More in, More out within the max limitations of the motors insides.
An even smaller example is when someone buys a free flowing Corsa or Borla system yet sais I dont want to do teh cold air intake well if the physics of teh air intake dont allow for addittional air volume(and they wont with stock)Your shiny new exhaust just made you more NOISE and a Placebo hp gain. Now add an Intake that flows more air and the motor has the extra air it needs. Our cars are computer limited for emissions stds and Govt regulation to meet cafe ratings. So In order for the control to allow extra fuel and air to flow thru and add Ignition timing we need a tune.
If the pulley is changed to 3.5 or 3.75 it wont be 16lbs of boost. But it may be over 8 and that is risky especially if they are seeing knock already. As soon as teh knock sensors see that knock the timing will retard and the truck will detune itself to protect itself.
All the info here helps us to learn together no need to slander anyone or drive anyone out.
Now Red Wagon Cmon man we can all add unlimited nitrous and steering wheel buttons and outrun anything out there just like the movie...LOL
FF8 in movies April 14
Ya know your all going to see it!
STEVE
 
#40 ·
We all learn something new everyday.

Here's some teaser :)


 
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