Custom Water/Methanol Injection System

[aronhk_md]

LOL.......thats ok, at least you got a response. I asked him what his results were on the dyno 2nd time around with the bigger nozzle, and got no reply.

[TheKingOTW]

LOL.......thats ok, at least you got a response. I asked him what his results were on the dyno 2nd time around with the bigger nozzle, and got no reply.

Sorry, I did not see your question. I got a bit more rich condition but we tweaked it out in the VE table. The car is running great now. We picked up about 8HP with the injector upgrade.

[garner67]

Nothing to add, just drooling over your ride. Impressive build.

[aronhk_md]

That is just incredible. Almost 80 hp with the meth/water injection. I can only guess at how mine improved, as I havent had it on the dyno since the methanol was added. Any way I look at it traction is my biggest problem. Even at higher speeds the car is just a handful and the rear end is trying to swap with the front end. Love the safety factor the meth adds on top of the performance gains. Two questions for you.

1 - What meth.water mix percentage did you use on the dyno? I know you mentioned getting a bit rich, and I noticed it some with mine too. Using the -30 windshield washer fluid here.

2 - to achieve those hp gains over your previous NON injection status did you bump up timing? Did you do it the first time with the smaller nozzle AND the second time with the larger? I have an intercooler as well, but my compression is borderline high, and I'm hesitant to bump the timing too much....preferring the added safety of the injection to actually pushing for more hp.

Thanks,
Aron

[TheKingOTW]

That is just incredible. Almost 80 hp with the meth/water injection. I can only guess at how mine improved, as I havent had it on the dyno since the methanol was added. Any way I look at it traction is my biggest problem. Even at higher speeds the car is just a handful and the rear end is trying to swap with the front end. Love the safety factor the meth adds on top of the performance gains. Two questions for you.

1 - What meth.water mix percentage did you use on the dyno? I know you mentioned getting a bit rich, and I noticed it some with mine too. Using the -30 windshield washer fluid here.

2 - to achieve those hp gains over your previous NON injection status did you bump up timing? Did you do it the first time with the smaller nozzle AND the second time with the larger? I have an intercooler as well, but my compression is borderline high, and I'm hesitant to bump the timing too much....preferring the added safety of the injection to actually pushing for more hp.

Thanks,
Aron

The water/meth mixture is always 50/50. I buy the 5 gallon jug of VP methanol and mix it myself. To answer your second question, the only way to get an increase in horsepower when adding a water/methanol injection setup to your ride is by adding timing. The benefit to using this type of injection is to allow you to run as much timing as possible without any pinging. I did start with a smaller twin nozzle setup (375 X 2) and then went up to a pair of 441 squirters.

[aronhk_md]

Yes, I was told that for my setup I should use a 760 nozzle and a 380. So far I'm just sticking with the single 760 though. Mine has the 250 psi recirculating pump, whereas some of the units still for sale only have the 150 psi pressure actuated.

I have seen some reports that indicated no difference in intake charge temp between the 50/50 mixes and the 37/63 mixes like mine, but not really sure what to believe there. Methanol evaporates quicker to help cool, but water is actually capable of taking more heat with it when it DOES evaporate.

I will be playing with the timing, but very conservatively. The car really makes more power than I can normally use already, and its the safety margin on top of the intercooler that means the most to me.

Under 10-15 psi boost right now I'm at an air/fuel ratio of 10.1-10.5, so its a bit on the rich side.....where I prefer it, again for safety. I will lean it out slightly to get it into the upper 10's, and theres some power lurking there I know, but again.....dont really need more on the top, just hoping to pull as hard as possible low down. Someday when I build again I'll shoot for the 2000 hp range, but this motor cant handle much if any more than its making now.

Have you taken yours to the drag strip at all? I'm gonna get mine there before the end of the summer. Hoping to get it into the high 9's, even though its no longer setup as a drag strip car.

[H2Ogbodies]

I mix it 45/45/10 using distilled water, blue washer fluid and HEET. The idea is to give the vapor more flammability and it also acts as an on demand intercooler of sorts for the combustion chamber by reducing sensitivity to detonation. The kit I played around with had an aux. tank with stainless sensors and an autofill for the methonal tank.