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  #1 (permalink)  
Old 27 Mar 2018, 08:37 pm
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Default Diablo Sport Tuner

Does anybody have any input? I'm thinking about getting one and going to a tunner, I've got 06 GT Turbo, K & N Cold Air, 3" exhaust from header to a Magnaflow. Now i'm getting 11 lbs of boost.
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Old 28 Mar 2018, 06:35 am
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Default Re: Diablo Sport Tuner

Since you plan on using a professional tuning service, you should likely talking to them about which tuner to buy. For this purpose, a DS tuner will just be a tune loading device. There may be better options and the tuning service may be able to do a direct tune if they are local to you. So discuss this with them first.
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Old 27 Aug 2018, 02:24 pm
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Default Re: Diablo Sport Tuner

So I ended up getting the Diablo Sport E3 which was designed for a stock motor. So my car pinged, then went and got 101 octane and ran really good with 16 lbs of boots. Can't afford that so a friend told my to put in about 5 gallons of E-85 to 3/4 tank of 91, and it pulls 15 lbs of boost. so it's cheaper for me to do that and my car runs ****ing great. The tuner has various parameters that can be change. We made a few changed that made a difference but a dyno tuner could make more. I am very pleased.
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Old 28 Aug 2018, 09:45 am
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Default Re: Diablo Sport Tuner

Quote:
Originally Posted by Michaeld55 View Post
16 lbs of boots.


That should be about 16lbs.
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Old 09 Feb 2019, 01:58 am
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Default Re: Diablo Sport Tuner

Quote:
Originally Posted by Michaeld55 View Post
So I ended up getting the Diablo Sport E3 which was designed for a stock motor. So my car pinged, then went and got 101 octane and ran really good with 16 lbs of boots. Can't afford that so a friend told my to put in about 5 gallons of E-85 to 3/4 tank of 91, and it pulls 15 lbs of boost. so it's cheaper for me to do that and my car runs ****ing great. The tuner has various parameters that can be change. We made a few changed that made a difference but a dyno tuner could make more. I am very pleased.
So was it tuned to race fuel? How does dropping octane helps? Iím so confused and feel stupid please explain for slower folks like myself
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Old 09 Feb 2019, 08:51 am
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Default Re: Diablo Sport Tuner

Quote:
Originally Posted by 808PTcruiser View Post
So was it tuned to race fuel? How does dropping octane helps? I’m so confused and feel stupid please explain for slower folks like myself
Octane rating is an old-school measurement. Gasoline is a mixture of mostly straight chain alkanes that are boiled (distilled) off of crude oil at different temperatures. Alkanes are simple carbon molecules with hydrogen atoms attached to them. One of those straight chain carbon molecules is "octane" which is an eight-carbon alkane, but octane rating has little to do with this. Additionally, gasoline has lots of other impurities and additives than are not straight-chain alkanes. This is so common that gasolines from different sources may not be very similar from a chemical standpoint, but yet will behave about the same when used as fuel.

Octane rating is a measurement of the antiknock properties of a fuel, based on a comparison with a test mixture of isooctane and heptane. Imagine isoctane as an eight-carbon alkane with a "Y" at one end. Heptane is a seven-carbon alkane.

The higher the octane rating, the more compression the fuel can withstand before detonating. If the octane rating is too low it may lead to pinging and engine knock. Turbocharged engines often build higher compression when boosting and may need higher octane fuel to eliminate pinging and knocking due to premature fuel ignition. Advancing ignition timing can also cause premature ignition as well. Modern cars will often retard ignition when engine knock is detected passed a certain threshold. This helps protect the engine but decreases engine performance in most cases.

Ethanol (ethyl alcohol) has a higher activation energy than most gasoline. This means it's harder to ignite by compression alone. So by adding a certain amount of E-85 (gas-ethanol mixture) to regular gasoline, you can sometimes eliminate the pinging and engine knock that is due to premature ignition in high compression engines. Using a Stage 1 PCM or performance tune on your PT will usually increase turbocharger boost and that can increase cylinder compression when boosting. Ignition may also be advanced beyond factory parameters. I run 15 psi of boost in my PT and my engine runs fine on 93 octane fuel from the service station. Some members can run extra boost on a lower octane rating, and I guess some report needing more depending on several other variables. A mixture of E-85 can sometimes be an alternative if you experiment to get everything right.

Now, do I get a cookie?
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Old 10 Feb 2019, 02:51 am
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Default Re: Diablo Sport Tuner

Handy, I feel like back in high school chemistry class and I forgot to do my homework again 😂 That explains a lot, I always thought that higher octane being more pure, just burns longer, thatís why timing needs to be advanced, so you get that longer complete work cycle (maw powa) ... so if I understand correctly, adding more ethanol, you introduce more fuel impurities, so to speak and that in the way boosts your octane? Or makes burning cycle less explosive? So correct me if Iím wrong, but adding ethanol you lose power, you only lower chance of detonation ?
I always thought that introducing more ethanol is the worse thing that you can do to the internal combustion engine? Pump gas already has about 10% of ethanol, right?

Sorry, but no cookies 🍪, I are them all earlier
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Old 10 Feb 2019, 03:13 am
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Default Re: Diablo Sport Tuner

Quote:
Originally Posted by Handy_Cruiser View Post
Octane rating is an old-school measurement. Gasoline is a mixture of mostly straight chain alkanes that are boiled (distilled) off of crude oil at different temperatures. Alkanes are simple carbon molecules with hydrogen atoms attached to them. One of those straight chain carbon molecules is "octane" which is an eight-carbon alkane, but octane rating has little to do with this. Additionally, gasoline has lots of other impurities and additives than are not straight-chain alkanes. This is so common that gasolines from different sources may not be very similar from a chemical standpoint, but yet will behave about the same when used as fuel.

Octane rating is a measurement of the antiknock properties of a fuel, based on a comparison with a test mixture of isooctane and heptane. Imagine isoctane as an eight-carbon alkane with a "Y" at one end. Heptane is a seven-carbon alkane.

The higher the octane rating, the more compression the fuel can withstand before detonating. If the octane rating is too low it may lead to pinging and engine knock. Turbocharged engines often build higher compression when boosting and may need higher octane fuel to eliminate pinging and knocking due to premature fuel ignition. Advancing ignition timing can also cause premature ignition as well. Modern cars will often retard ignition when engine knock is detected passed a certain threshold. This helps protect the engine but decreases engine performance in most cases.

Ethanol (ethyl alcohol) has a higher activation energy than most gasoline. This means it's harder to ignite by compression alone. So by adding a certain amount of E-85 (gas-ethanol mixture) to regular gasoline, you can sometimes eliminate the pinging and engine knock that is due to premature ignition in high compression engines. Using a Stage 1 PCM or performance tune on your PT will usually increase turbocharger boost and that can increase cylinder compression when boosting. Ignition may also be advanced beyond factory parameters. I run 15 psi of boost in my PT and my engine runs fine on 93 octane fuel from the service station. Some members can run extra boost on a lower octane rating, and I guess some report needing more depending on several other variables. A mixture of E-85 can sometimes be an alternative if you experiment to get everything right.

Now, do I get a cookie?
Cookie is not quite there yet. Octane means a lot of different things to engineers. The number is not really set in stone, except when paired with a scientific standardized way of testing and measurement. Thus, comes into the effect of the Ron plus Mon (averaged) level used on North American gasoline known as R+M/2 . Other countries have different octane measurement standards that sometimes to me seem like they're out to lunch.
Turbo boost does not really mean anything on it's own as pressure in a flowing fluid is dependent on the volume, restriction, and flow. Also coming into play is the compression ratio on the engine. As the engine wears out, it's cylinder compression lowers, and more boost can be applied without knocking.
Regular gasonline in North America contains up to 10% ethanol by volume, as per regulation in the last several years. Ethanol can effectively increase the octane rating of a fuel if it's mixed. For turbocharged engines, 10$ blended ethanol fuel is slight advantage.
The amount of boost called for by the PCM is a function of it's programmed variables, and a feedback loop from the engine's sensors and controls.

A fuels' octane rating can be simplified as it's ability or tendency to resist knocking, or predetonation. As engine compression ratios increase, or boost increases, there's a limitation to the amount of timing advance that can be applied before knocking occurs. Using a higher octane rated fuel will allow timing to be more advanced, for a longer burn-time in the combustion chamber and a stronger and more powerful flame front.

With a stock engine, the syked stage 1 PCM, and 91 octane, I got peak levels of 15 lbs of boost. Removing the catalytic converter lowered boost, as flow increased and restriction decreased. Now peak boost is about 15 but steady boost of load tends to be from 12-13 on 91. Turbo spool-up is noticeably improved. When I use 94 octane, I noticed a little bit increase in my butt-dyno of torque, but it's probably not anything scientific without having a dyno test. Since the 91 octane can get to 15 lbs of boost, there's no point of using 94 octane as the engine's not using the full capability of the 91 octane yet.

Also you must take into consideration the limitation of the engine controller's measurement devices is going to be the working window of what it can control as far as boost control goes. The stock intake pressure sensor has a scale of 30 pounds, given a full vacuum of 15 psi and boost up to 15. So if you can get 15 lbs of boost, that's the maximum you can get. It doesn't matter what your tune is, either your gauge is inaccurate, the sensor is inaccurate, but there's no free lunch. The real solution is to get a 45 psi pressure sensor and then re-scale the PCM's calibration. This will give you a capability of controlling up to 30 psi of boost. As far as the capability of rescaling, i'm not sure what the other tune systems can do but the syked pro software suite with the programmer can certainly do this.

Increasing the exhaust diameter to 3" ID will further reduce the pressure, and increase the flow. Flow is essentially the more correct indicator of increased power.

Second, to the OP Michaeld55, your KN airfilter does nothing. It's an unscientific gimmick with certainly no independent laboratory tests proving the efficacy. It's all marketing and fraud. The greatest disadvantage being faster contamination of your oil due to the entrance of smaller particles passed through the filter medium of the KN filter. If you want to get performance, think and act scientifically.
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2003 Green GT M/T, Michelin Pilot Sport AS 3 Plus Tires 205/50ZR17, black and grey interior, oem cargo net, oem parcel shelf, oem slush mats and trunk protector, platinum edition pedals, Neon SX 2.0 steering wheel with black+grey wrapped leather cover, front and rear oem mud guards, lowering springs, KYB gas shocks, Valeo solid flywheel conversion and clutch kit, 'ancor' brand engine mount replacements with urethane inserts. full body urethane bushings kit. Chrysler premium front speakers, Jenson 6x9 rears, oem mopar subwoofer, Boston Audio 4x55W amp. Panasonic head unit with bluetooth. 300W AC power inverter. Escort 360max and Escort Shifter ZR4, dual front+rear dash camera. stage 1 blow off valve and syked tune computer . Boost and oil pressure gauges with Turbo-Timer. Needswings 3" exhaust elbow, Electric valve actuated Y-pipe with catalytic converter. To do: coilovers, 2step controller, quaife diff, Air-Fuel Meter

Last edited by _PTGT03; 10 Feb 2019 at 03:29 am.
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  #9 (permalink)  
Old 10 Feb 2019, 04:17 am
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Default Re: Diablo Sport Tuner

A lot of good information to absorb... I donít want to open can of worms, but... what tuner should dumb guy like myself should get, if I wanted to use pump premium 92 and keep rest of the car stock? Or is that even worth it? Itís 06 5 speed and I read a lot of conflicting information about that year
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Old 10 Feb 2019, 04:43 am
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Default Re: Diablo Sport Tuner

Quote:
Originally Posted by 808PTcruiser View Post
A lot of good information to absorb... I donít want to open can of worms, but... what tuner should dumb guy like myself should get, if I wanted to use pump premium 92 and keep rest of the car stock? Or is that even worth it? Itís 06 5 speed and I read a lot of conflicting information about that year
Don't get a tuner to keep things simple. Send in a spare PCM compatible to the syked tuning business, have it programmed with his stage 1, your VIN number, and then plug-and play and keep your stock PCM as a spare. Won't need 92, 91 octane is fine and will get full performance from that.
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2003 Green GT M/T, Michelin Pilot Sport AS 3 Plus Tires 205/50ZR17, black and grey interior, oem cargo net, oem parcel shelf, oem slush mats and trunk protector, platinum edition pedals, Neon SX 2.0 steering wheel with black+grey wrapped leather cover, front and rear oem mud guards, lowering springs, KYB gas shocks, Valeo solid flywheel conversion and clutch kit, 'ancor' brand engine mount replacements with urethane inserts. full body urethane bushings kit. Chrysler premium front speakers, Jenson 6x9 rears, oem mopar subwoofer, Boston Audio 4x55W amp. Panasonic head unit with bluetooth. 300W AC power inverter. Escort 360max and Escort Shifter ZR4, dual front+rear dash camera. stage 1 blow off valve and syked tune computer . Boost and oil pressure gauges with Turbo-Timer. Needswings 3" exhaust elbow, Electric valve actuated Y-pipe with catalytic converter. To do: coilovers, 2step controller, quaife diff, Air-Fuel Meter
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