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Setting up for a 200 shot... [Archive] - Toyota MR2 Message Board

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Setting up for a 200 shot... [Archive] - Toyota MR2 Message Board Toyota MR2 Message Board > Toyota MR2 Generations > MK 2 MR2 - SW20 > MK2 Stand-Alone EMS and Nitrous Discussion > Setting up for a 200 shot... PDA

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MR2TuRbZ08-23-2007, 09:45 AMAlright, i'm still on the stock CT26, but i have a fully built bottom end ready to take some abuse.

I have everything ready to go except the fuel system. I have a Bosch 044 fuel pump which will flow more than enough. Question is, can i just install that into the stock fuel system and tap off of it for the nitrous fuel side? or do i have to do an entire fuel system?


I really just want an 11 sec pass before the year is over so i was going to start out with a 75 shot and just work my way up from there all the way up to a 200 shot if i have to.


Thanks guys!
-Damon MR2liter08-23-2007, 10:40 AM300 shot. !! MR2TuRbZ08-23-2007, 10:47 AMi would if i had the solenoids to do it! they max out at 200 :( TomsMR208-23-2007, 11:56 PMstepped, or you just want BAM, 200! ?

thats a big shot.. rickyb posted up a great article about why you dont want to be running a monster pump when you dont need it. on a ct26, you're not going to need it, but for that shot you will.. best option would be a dedicated pump and small tank with 100+ octane in it. Enthalpy08-24-2007, 05:27 PMIf you plan on a 200 shot, you had better have race gas in there! You will blow that thing in short order without proper timing retard.

As for the pump, it might be time for some dedicated lines, as the pressure might drop at system activation. It's a simple test. Force the pump into high mode (you should already, and you should have an aftermarket rail). With the motor off, activate the system so it sprays into a bucket. Monitor the fuel pressure at the stock rail. MR2TuRbZ08-25-2007, 02:00 PMIf you plan on a 200 shot, you had better have race gas in there! You will blow that thing in short order without proper timing retard.

As for the pump, it might be time for some dedicated lines, as the pressure might drop at system activation. It's a simple test. Force the pump into high mode (you should already, and you should have an aftermarket rail). With the motor off, activate the system so it sprays into a bucket. Monitor the fuel pressure at the stock rail.


good call, i will be trying that... i decided to install the monster fuel system i have laying on the floor and just pray i can tune it :D


Bosch 044 Fuel pump in tank feeding a surge tank in engine bay, then a Weldon 2035a Fuel pump feeds the wolfkatz TFFR with 1680cc injectors... still on a CT26 :D

I may try and snag some 450cc top feed DSM injectors until the 35r or 42r goes on the car Enthalpy08-25-2007, 10:32 PMWith the right tuning tools (reliable timing retard like an EMS, ability to adjust fueling and a dyno), you can tune a nitrous system very well. Without some of these tools, you really are shooting in the dark.

Nitrous has a reputation for blowing motors not because it's difficult or dangerous to tune, but because people half-ass the engine management thinking nitrous is cheap power.

1680 cc injectors will be nearly impossible to idle. It will be completely, utterly overkill with dramatic drawbacks. I recommend you size your injectors approprite to the need. I would go with the 450s until you need more. You will definitely need an EMS to control injectors that big with nitrous. MR2TuRbZ08-26-2007, 05:14 PMI'm on an AEM EMS... i plan to switch over to straight ethanol next season, hence the 1680cc injectors. RickyB08-26-2007, 06:54 PMNitrous is a hungry beast that must be fed and cared for properly. If not, it will literaly feed on your forged piston and your block. Free oxygen at high temperaures WILL bind with something, regardless of whether it is hydrogen, carbon or iron.

Is this nitrous injected through a single injector before the throttle or directly into each runner? If the former, keep it to a 50 shot maximum unless you have an intake manifold which is wet-tested to flow very evenly. The stock manifold is not that great at flowing air evenly, much less fuel and nitrous. This is not my theory. I've seen the unfortunate results of tossing in too much nitrous through the stock intake manifold. You end up with two perfect cylinders (1, 4) and two useless ones (2, 3).

An EMS AND DIRECT PORT INJECTION is a must for any serious nitrous use.

Using a 200 shot of nitrous is also not going to give the desired results on a CT26 turbo. Nitrous is a great way to get more oxygen molecules into the combustion chamber, but once they separate from the nitrogen and bind with fuel, the resulting exhaust is equivalent in volume to that produced with atmospheric oxygen. The turbine nozzle area of the CT26 is simply too restrictive to allow much more that ~275rwhp of exhaust to flow out, regardless of how the components of all that exhaust were put into the cylinder. You may as well just shove a potato up your tailpipe as use a CT26 with that much nitrous.

Get a big turbo setup, size the fuel system appropriately for your power needs and then you will find that you can hit your 1/4 mile goals without having to play around with fire. Powered by vBulletin® Version 4.2.5 Copyright © 2026 vBulletin Solutions Inc. All rights reserved.

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