Big shot will kill the twins
all you will do is max out the twins overspin them and just be producing overheated super hot air that is way out of their effciency range...dont waste your time and just get a single, be way more efficient, and if you want fast spool, just a dbb 61, or 63 or 67 trim depending on what your hp goals are on pump gas and if you want max hp on pump, just install a water/meth kit on.I have begun researching a nitrous set-up to go along with my stock twins. Currently, I'm running [email protected], and will use a small 50-75 shot to help things along. I had intended on going single next year.
If the stock Supra bottom end can hold big boost and make big HP numbers, why not just use a big shot of nitrous instead of going single? My line of thought is if I already have a nitrous kit, why not just buy a larger jet and use the money I would have spent on a single kit and use that for a fuel system?
Please bear in mind I LOVE my twins on the street, and the car is used as a daily and GT car. I only go to the track for events or goofing off. I do not race on the streets, so a single kit on the street might not be used to its potential..know what I mean?
What is the largest shot you could use on a Supra with the stock twins + aftermarket fuel and EMS? I'm just wondering if this is a feasible option instead of going with a single.
Thanks for all replies...
Imagine too much air (nitrous increases the efficiency of "normal" air) coming into the engine and all that air/exhaust has to go somewhere out of the engine, putting very high pressure on the turbo(s).I'm sitting here scratching my head at these replies. What does the efficiency range of the turbos have to do with nitrous going in the motor? He's running the same boost so the efficiency range hasn't changed for them.
1. The amount of nitrous in a 200 shot isn't a lot so there isn't much extra "air" coming out of the engine.Imagine too much air (nitrous increases the efficiency of "normal" air) coming into the engine and all that air/exhaust has to go somewhere out of the engine, putting very high pressure on the turbo(s).
Nitrous creates more HP, the extra HP increases the exhaust flow, which spins the turbos faster than they should b/c the small wastegate can't keep up.1. The amount of nitrous in a 200 shot isn't a lot so there isn't much extra "air" coming out of the engine.
2. Isn't that was a wastegate (although admittedly they're probably undersized) is for?
3. Nitrous cools the intake charge so you could run more a little boost before running out of efficiency.
I know for a fact the Zex CRX that ran NDRA back in the day was running a fairly small turbo (60-1) with a 250 shot and ran 10.3. Considering the car made about 375-400whp on boost, the nitrous was obviously playing some roll in that ET.
I've never done it but I always find it funny how scared/misinformed the import scene is about nitrous.
.. For 4 cyl yeah sure. But it's on of the smallest turbos people go with for SuprasSide note: a 60-1 is not a "small" turbo for a 4 cyl engine, I had one on my old Talon and didnt spool-up until 5000 RPM.
Holy shit! Did you ever make a full pass. on twins & spray?
HP doesn't create exhaust flow, the air going through the engine does. A car on a shitty tune making 400hp that is retuned and makes 550 doesn't have any more exhaust flow, the volume going in will equal the volume coming out no matter what. The only change in volume will be the amount of nitrous/fuel introduced which will not be that much. I don't have experience with stock turbo wastegates though so i have no idea if they'd be unable to keep up.Nitrous creates more HP, the extra HP increases the exhaust flow, which spins the turbos faster than they should b/c the small wastegate can't keep up.
Of course you won't get "the most" out of it but very rarely are people getting the most out of any setup on a budget.If you can put a larger wastegate on the stock twins, then you wont overspin them anymore, but the small exhaust housings will choke down the HP, and you wont get the most out of the 200 shot.
In a class that is full of cars with gt42r's that's a small turbo. It did of course have a good manifold and a 46mm wastegate though.Side note: a 60-1 is not a "small" turbo for a 4 cyl engine, I had one on my old Talon and didnt spool-up until 5000 RPM.
yep 10.6 @128Holy shit! Did you ever make a full pass. on twins & spray?