methanol injection vs nitrous oxide
Discussion
hi guys has anyone got any experience with methanol injection. I am starting to look into both methanol injection and nitrous oxide systems. However I have my reservations about using nitrous as there seems to be as many risks as gains using it. I guess some information about my setup will help. The car is a global gt light which is being used for drag racing. Currently I am having a naturally aspirated cbr engine fitted, running after market engine management. The car is more or less being rebuilt from the rear bulkhead back. The car will run shell v power with added octane boost. The car is being future proofed as much as possible ready for turbo charging when funds allow but at the moment I want to find out what is possible, what the drawbacks are and how much money I need to stash away from when I go for my next round of upgrades. Any experience advice or suggestions on ever type of system are greatly appreciated.
If you are going turbo you will need to rebuild the engine with much lower static compression so you can force more air in without det
Cams may need changing as turbo instals benefit from much less overlap
Once you have done all this intros would increase power further and if a jet is instaled in the compresdor side it could spin up the turbo before the exhaust side much reducing lag, you would need more fuel at this time.
Cams may need changing as turbo instals benefit from much less overlap
Once you have done all this intros would increase power further and if a jet is instaled in the compresdor side it could spin up the turbo before the exhaust side much reducing lag, you would need more fuel at this time.
water / meth allows you to run more boost, so you get more power.
Add more water / meth allows for more boost....
You can add as much as 1.5 times the amount of fuel. Your ignition needs to cope and you engine needs to hold together as you would only do this running really high boost. We talk 2bar and above.
Just add water / meth without more boost, you essentially cool the engine's interior and you can be more aggressive on the timing. You actually have to.
Just adding it without changing the mapping, you actually reduce power as combustion slows down. It has as similar effect as retarding ignition timing.
Nitrous oxide + fuel adds power. It also benefits from meth / water as you also need all the knock suppression you can get going for BIG power.
For a NA engine, there is little benefit from methanol / water.
You could benefit from running pure methanol in a NA application, but you would need to build the engine for it with very high compression ratios.
and add nitrous oxide......
So there is no one vs the other. For a NA engine, go nitrous. Turbocharging combined nitrous would not be the very first thing i'd try. Maybe the third, but get it going in first place.
read a nice thing recently. Cited from a MadMax movie. "Speed's just a question of money. How fast you wanna go?" :-)
Add more water / meth allows for more boost....
You can add as much as 1.5 times the amount of fuel. Your ignition needs to cope and you engine needs to hold together as you would only do this running really high boost. We talk 2bar and above.
Just add water / meth without more boost, you essentially cool the engine's interior and you can be more aggressive on the timing. You actually have to.
Just adding it without changing the mapping, you actually reduce power as combustion slows down. It has as similar effect as retarding ignition timing.
Nitrous oxide + fuel adds power. It also benefits from meth / water as you also need all the knock suppression you can get going for BIG power.
For a NA engine, there is little benefit from methanol / water.
You could benefit from running pure methanol in a NA application, but you would need to build the engine for it with very high compression ratios.
and add nitrous oxide......
So there is no one vs the other. For a NA engine, go nitrous. Turbocharging combined nitrous would not be the very first thing i'd try. Maybe the third, but get it going in first place.
read a nice thing recently. Cited from a MadMax movie. "Speed's just a question of money. How fast you wanna go?" :-)
You could run petrol normally, with nitrous injected with methanol, not petrol.
So petrol through your injectors/carbs for low throttle running and nitrous mixed with methanol for full bore stuff. The addition of methanol with a higher octane, and the low temperature of the nitrous holds back the knock quite well. Its fine to mix methanol with petrol as far as I know.
This is what I tried with a car once and it worked so well that the clutch sheared from the torque boost. In the end I just reverted to high octane petrol and smaller nitrous jets because I couldn't be bothered with the time and expense of upgrading the clutch
So petrol through your injectors/carbs for low throttle running and nitrous mixed with methanol for full bore stuff. The addition of methanol with a higher octane, and the low temperature of the nitrous holds back the knock quite well. Its fine to mix methanol with petrol as far as I know.
This is what I tried with a car once and it worked so well that the clutch sheared from the torque boost. In the end I just reverted to high octane petrol and smaller nitrous jets because I couldn't be bothered with the time and expense of upgrading the clutch
A mate is using water/Meth injection on his mk5 Golf TSI he gained 40hp
he is now running 413hp at the wheels and nearly 500ft ....
stock crank
H section rods
CP Pistons
st inlet manifold
S2 Injectors and fuel pump
head lightly flowed
Cams and double springs with Titanium caps (regularly sees 8k)
Devils own water/meth injection
Big intercooler
Turbo unsure but using 2 bar and zero lag
3.7 to 60 mph and just under 10 to 100 mph 11.70 1/4
Owe yes S3 4x4 running gear all in a stock looking reg golf ...
A mate is using water/Meth injection on his mk5 Golf TSI he gained 40hp
he is now running 413hp at the wheels and nearly 500ft ....
stock crank
H section rods
CP Pistons
st inlet manifold
S2 Injectors and fuel pump
head lightly flowed
Cams and double springs with Titanium caps (regularly sees 8k)
Devils own water/meth injection
Big intercooler
Turbo unsure but using 2 bar and zero lag
3.7 to 60 mph and just under 10 to 100 mph 11.70 1/4
Owe yes S3 4x4 running gear all in a stock looking reg golf ...
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