Real Dyno Power gains (or seat of the pants ;) )

[dwh4784]

I'm not going to bother dynoing it afterall, if it has made any difference it's not noticible. Not worth spending the money to dyno it again anyways.

[ash]

Quote:

Originally Posted by iTurbo I doubt you'll see much gain at the same boost level if detonation isn't a problem. The alcohol would help drop the charge temps, but if you weren't having detonation problems before the alcohol it probably won't provide a substantial gain. But, if you up the boost and use the alcohol to keep detonation away, I would expect to see gains similar to adding a better intercooler. Of course, since alcohol is also a fuel, that should also help to support more boost.

I have played with methonal injection . This is on chev V8 tho. I played with injectors in the plenum and then taken them out. The meth add more torque to the engine and also cools the intake air charge down heaps. From 126 deg C down to 54 deg C.........The engine sounded lazier, but made more torque , and for longer.
Picture of my engine in " other turbo vehicles" i think it is called...

[ash]

Quote:

Originally Posted by iTurbo I doubt you'll see much gain at the same boost level if detonation isn't a problem. The alcohol would help drop the charge temps, but if you weren't having detonation problems before the alcohol it probably won't provide a substantial gain. But, if you up the boost and use the alcohol to keep detonation away, I would expect to see gains similar to adding a better intercooler. Of course, since alcohol is also a fuel, that should also help to support more boost.

If alcohol was injected, the intake air WILL be cooler, therefore more torque will be abtained. Methanol will naturaly make more torque as well. If more torque is obtained, and it made for longer, more horsepower it gained.Horsepower is derived from torque AT a rpm. eg. HP = rpm multipled by torque then divided by 5252. eg...If you have 5000 rpm by 350 ft/lb's then 5000 * 350 / 5252 = 333.2 hp...
if you have 6000 rpm by 350 ft/lbs then..... 6000 * 350 / 5252 = 399.8 hp
Also, you will have more hp at the same boost (maybe alittle more boost from extra gases coming out the engine.) and same ignition timing, with methanol injected.

[ash]

Quote:

Originally Posted by Raymont Yes, thats what I'm asking. Even with raised boost, more advanced timing, how much of a gain is it really worth. Thats the point of using alky/meth injection. Im trying to get a basline hp &boost level vs the raised boost timing whatever else the alky injection suports hp measurment.

I've just complteted a R & D sesion on the dyno , but using another type of engine. I hope thses ideas can help you.
With extra meth injected into plenum, the intake air temps drop about 30 deg C ! This allowed for 4 psi LESS boost and 8 DEgress LESS timing to make the same hp levels. Keeping in mind that this is a meth engine and no intercooler used.More meth and adjusting the timing to suit engine requirements , will increase the torque, and if you can keep the toque going for longer..... therefore more hp is generated.
Hope this helps
Ash

[frostburner]

ive done a back to back dyno run on one of my turbo cars using alky, i had a 45 hp 50 ft lb gain with alchy as it let me raise the boost 6 psi over its detonation point. Wasnt on a turbo dodge though but i know it works.

[SpraynLog]

Quote:

Originally Posted by Raymont Has anyone done a before/after dyno with alky/meth injection? Juuusstt wondering

I don't know if you have an intercooled car or not, but I have been able to run boost levels at least 6lbs higher on a non-intercooled log intake car. I think I remember a "rule of thumb" that says you gain 8 HP for each pound of boost. So, 6 lbs would get you nearly 50 HP on a non-intercooled car. This has been good enough to get my '86 Lebaron into the high 14's.

[Raymont]

Thank you much... Loooks like i'll be adding alky.......

[shelbyplaya]

hahahaha. i can see you now ray. sitting out in your garage with a bottle of RR talking to your car "one for me, one for you, one for me, one for you" by the time you get done, you and your car will hardley be moveable