Is Racing on 93 "Safe"? Not really.

[Speedy!]

I've wondered if the programming is smart enough to extrapolate past the table scale but don't have an answer. I rescaled all of mine

 

[jonx96]

I've wondered if the programming is smart enough to extrapolate past the table scale but don't have an answer. I rescaled all of mine

i think it is smart enough to blend between values. But I don’t l would doubt smart enough to clear after. But have never tested but no tested or confirmed evidence. Could test it but I won’t 😂

 

[fumanchu182]

I've wondered if the programming is smart enough to extrapolate past the table scale but don't have an answer. I rescaled all of mine

I agree with @jonx96 in regards to it being smart enough. Its not a linear curve though so it could be off if not really accounted for.

In regards to the WOT on just 93, my timing is limited to 10* in the bottom right most entry then blended vertically and horizontally. Thats safe for me. Ymmv

 

[Hickster]

Well, that time of the day to check the stills. Got to 48 tonight and have to keep the heat at a constant 170. In order to fuel the car with 110 octane or better. Make my own fuel and drinkables. Have to taste it before it goes in the tank. Every day thing.

 

[fubar569]

Seeing all this just makes me want to get back into tuning mine again and I'm not sure I have the alcohol for this.

For me. Or the car. Ha.

 

[ACMAVRO]

Has anyone used the VP fuel cleaner after/octanium?

VP Octanium Unleaded: VP Racing Octane Booster | VP Racing Fuels, Inc



Will Octanium® Unleaded leave orange deposits on my spark plugs? Will I have to change my plugs sooner?
In a word, maybe. Octanium Unleaded may cause orange deposits on spark plugs as a result of its high concentration of MMT. As a result, we would recommend adding VP Fuel Cleaner with RP21, which is formulated to clean and restore engine components. In addition, you can also blend Octanium Unleaded with gasoline at specific ratios, which will add even more protection for emission control devices (see chart above).

 

[BULL]

Has anyone used the VP fuel cleaner after/octanium?

VP Octanium Unleaded: VP Racing Octane Booster | VP Racing Fuels, Inc

View attachment 63759

Will Octanium® Unleaded leave orange deposits on my spark plugs? Will I have to change my plugs sooner?
In a word, maybe. Octanium Unleaded may cause orange deposits on spark plugs as a result of its high concentration of MMT. As a result, we would recommend adding VP Fuel Cleaner with RP21, which is formulated to clean and restore engine components. In addition, you can also blend Octanium Unleaded with gasoline at specific ratios, which will add even more protection for emission control devices (see chart above).

I have not, but more than that, that chart is only showing 7.0 for an increase in octane, whereas people are using it at 10.0 points or more.

Yet it's pretty much "red" at 5.0 points and implying very frequent maintenance??

Telling to me.

 

[EricG]

Dodge wanted to claim a 700+HP car off the show room floor. That's what this is. If you look at the later year Hellcat tunes, and the Redeye tunes, you'll see they reduced timing a bit. It doesn't take much to dial in right on the edge of knock and stay below it. So that 4 deg of STKR I saw in my above log, taking out 1 degree of timing might have gotten rid of all of it. Once knock kicks off it can be contagious LOL.

Custom tunes and pulleys from reputable tuners you won't see as many problems these days as now they know where the timing and knock sensor limits are to avoid them.

If I were reviewing a log from my 2016 Hellcat bone stock and it was a modified car I was working with I would have pulled 3deg of timing and tested. If that worked I'd add one back and see what happened. I also would have never set the commanded PE fueling to 12.1 AFR, more like the 11.4 - 11.8 we talked about previously.

Would be interesting to look at the same scenario with a later year Hellcat or Redeye/Demon tune to see if similar knock shows up on regular premium unleaded. What you are showing in the first post is from a stock 2016, right?

 

[Speedy!]

Checking on a new model would be a good test, however it only takes one bad fillup to have an expensive day so I'd still not race without something good in the tank as a buffer.

 

[EricG]

Checking on a new model would be a good test, however it only takes one bad fillup to have an expensive day so I'd still not race without something good in the tank as a buffer.

Thanks and noted...and I was so proud to tell everyone around here I ran 10s on the stock tune and pump gas LOL

Will spike my tank while racing from now on...I don't exactly go slow in my daily driving though.

 

[Speedy!]

You're still running 10s on the stock setup. The good fuel is just a safety measure. Upping the octane to keep things safe doesn't change the tune

 

[16GoManGoHC2]

Has anyone used the VP fuel cleaner after/octanium?

VP Octanium Unleaded: VP Racing Octane Booster | VP Racing Fuels, Inc

View attachment 63759

Will Octanium® Unleaded leave orange deposits on my spark plugs? Will I have to change my plugs sooner?
In a word, maybe. Octanium Unleaded may cause orange deposits on spark plugs as a result of its high concentration of MMT. As a result, we would recommend adding VP Fuel Cleaner with RP21, which is formulated to clean and restore engine components. In addition, you can also blend Octanium Unleaded with gasoline at specific ratios, which will add even more protection for emission control devices (see chart above).

Never used the cleaner but after using it for 9-10,000 miles 1 qt of Octanium Unleaded per 15 gallons of fuel (1 can every fill up) I tried every industrial cleaner I could get my hands on including MEK, Triclorethyne, lacquer thinner, gasoline, kerosene, oven cleaner directly soaking it for days on the valves of my heads turned upside down nothing short of a dremel and sanding disks took it off the exhaust valves. Worse was the seats both on the valve and in the head only way to clean them up was lapping compound. My days of MMT use are over!! Took a few evening to clean things up. I at one time swore by the stuff, now won’t touch it or recommend it’s use, in fact I discourage it now.

 

[Mean Cat]

Has anyone used the VP fuel cleaner after/octanium?

VP Octanium Unleaded: VP Racing Octane Booster | VP Racing Fuels, Inc

View attachment 63759

Will Octanium® Unleaded leave orange deposits on my spark plugs? Will I have to change my plugs sooner?
In a word, maybe. Octanium Unleaded may cause orange deposits on spark plugs as a result of its high concentration of MMT. As a result, we would recommend adding VP Fuel Cleaner with RP21, which is formulated to clean and restore engine components. In addition, you can also blend Octanium Unleaded with gasoline at specific ratios, which will add even more protection for emission control devices (see chart above).

I'm not sure on the difference between Octanium unleaded & Boostane mix rates for a specific octane level but according to that chart with 2.5 oz. will only gain 2 points of octane. A lot has to be used to get from 93 > 98 octane or higher.

With Boostane Professional 2.5 oz. in 8 gallons will gain 5 points & get you from 93 > 98 octane.
98 octane is what I shoot for.

 

[Mean Cat]

Never used the cleaner but after using it for 9-10,000 miles 1 qt of Octanium Unleaded per 15 gallons of fuel (1 can every fill up) I tried every industrial cleaner I could get my hands on including MEK, Triclorethyne, lacquer thinner, gasoline, kerosene, oven cleaner directly soaking it for days on the valves of my heads turned upside down nothing short of a dremel and sanding disks took it off the exhaust valves. Worse was the seats both on the valve and in the head only way to clean them up was lapping compound. My days of MMT use are over!! Took a few evening to clean things up. I at one time swore by the stuff, now won’t touch it or recommend it’s use, in fact I discourage it now. View attachment 63767 View attachment 63768 View attachment 63769 View attachment 63770 View attachment 63771 View attachment 63772 View attachment 63773 View attachment 63774 View attachment 63775 View attachment 63776

I don't see 1/4" buildup of residue that's been stated by some.

 

[Speedy!]

You better look closer then.

 

[TNREDEYE]

I don't see 1/4" buildup of residue that's been stated by some.

That is well over 1/4" if you use what's known as the "internet measuring system". LOL

 

[16GoManGoHC2]

I'm not sure on the difference between Octanium unleaded & Boostane mix rates for a specific octane level but according to that chart with 2.5 oz. will only gain 2 points of octane. A lot has to be used to get from 93 > 98 octane or higher.

With Boostane Professional 2.5 oz. in 8 gallons will gain 5 points & get you from 93 > 98 octane.
98 octane is what I shoot for.

And there my friends is the magic trick. Points and numbers are 2 different things!!! It take 10 points to make 1 octane number, so you better get adding more boostane if you want 98 octane. MMT is MMT, it takes just as much no matter the brand to increase octane the same amount!!



https://www.knowyourparts.com/techn...stem/fuel-additives-octane-ratings-explained/

 

[16GoManGoHC2]

I don't see 1/4" buildup of residue that's been stated by some.

Look at the indented tulip on the exhaust valve, see how deep the clean ones are? Now look at the dirty ones, some are almost flat to the top, the tulip is gone. That tulip shape increases surface space so valve can get cooled some by the incoming air and fuel charge. Take away the surface area take away the cooling area, worse yet add a layer of insulation (MMT build up) over the top of it and it starts to get real hot. What happens to a hot valve? Valve stem clearance disappears and you start scoring valve guides or worse have a valve stick open and the piston will sure help close it for you!!

 

[Speedy!]

How deep are the tulips in the exhaust valves Mike? I KNOW you measured them? At least 1/4 inch or are my eyes playing tricks

 

[16GoManGoHC2]

How deep are the tulips in the exhaust valves Mike? I KNOW you measured them? At least 1/4 inch or are my eyes playing tricks

Almost 3/8” deep