Haha I do understand why cooler air is better, but what people are suggesting is swap intercoolers instead of injectors. Your injectors can only pump in so much fuel, so even if the air is cooler no more fuel can get in, right? Or wrong?
Yeah so if updating the intercoolers, you will need to be careful how much boost you run so you don't max out your injectors, which is what others have been saying earlier in the thread. Which is why, especially with a turbo car, if you are upgrading anything the first thing to do is install a wideband sensor and guage so you can monitor afr's, and secondly an ecu upgrade so you can monitor/log knock & afr's, and make sure you have the car tuned immediately after upgrades by a competent tuner who has knock detection equipment (ie headphones). If the tuner says he doesn't need headphones as he can hear knock without them, run [TIS]
Not exactly what I was asking, but thanks nonetheless Shane "...running even 14 PSI on stock injectors - stock coolers, absolutely, but once they're (coolers) changed 15 PSI shouldn't be an issue. I ran that on my stockers (injectors) and didn't max the injectors. So long as the air can be adequately cooled ... it should be fine..." - Anti People have been saying that running +stock PSI should be fine as long as the air can be cooled. What does this have to do with how much fuel vs how much air you can get in? Or is Anti (and others) basically saying that some stock injectors can handle the requirements but the engine can sometimes overheat?
Yeah that's partially true and partially wrong. The cooler the air/fuel charge, the less likelihood to ping, but the more air being forced in the chamber, the more likelihood to ping. So more air requires more fuel. If the injectors aren't capable of supplying enough fuel, you run lean and risk ping. Another option no one has mentioned is to run an e10 PULP such as United Premium 100. This is PULP 98 + 10% ethanol. Has two benefits, first the ethanol increase the octane level to over 100. Second the ethanol content helps to decrease the combustion temps, helping to run more boost and more advance for more power. But again there is a downside, running ethanol requires more fuel to maintain correct afr's, so if you're already on the limit of your injectors capabilities, running e10 could again put you over. For example e85 uses about 30% more fuel than PULP 98.
The more boost you run i.e. higer than stock , the hotter the turbo's become and so does the air its compressing . Cooler air has higher density and carries more oxygen , so when you have higher boost you can compensate the extra hot air being generated by putting bigger intercoolers in . But as far as im aware this will only help marginally as with more air you need more fuel . The ecu will try and pump as much as it can from the info it gets from the AFM but the injectors will reach a limit as to volume of fuel it can move .
See this is interesting, I have been running 100 octane now for the last two lots of fuel through my car and it's definitely running a lot better. It's from United, as well. I also mentioned about e85 earlier, do you have any knowledge on that? I figure if I'm spending a grand on a tune I might as well wait until e85 comes to Ballarat and spend a bit more money for that particular tune, considering it's an extra ~40rwkw just for running that fuel. Yeah that's exactly what I figured. I didn't understand how cooler air helped increased fuel flow. It's obvious that I need new injectors. Coolers will come with time. Sensors and whatnot to make sure I'm not running lean/too hot/boost spiking etc.
For street use I probably wouldn't use E85, not common enough, and unless you have multiple tunes available in your ecu that can easily be switched to, you will have problems running PULP98 on an E85 tune, big problems. Even running PULP98 on an PULP-E10 tune is dangerous, especially if the tuner has dialled in more advance with the E10 fuel. As soon as you run PULP98 with that extra advance it will ping badly. For street I'd tune to PULP98 then run PULP-E10 when you can, but without the extra available advance. The extra power available on E85 will depend on the car, the tuner, and how much advance you dare to run, though it's pretty hard to ping on E85, provided you can get enough fuel into it. And you would want a full aftermarket ecu to run E85, I doubt any piggyback would successfully handle the additional fuel reliably.
whats the matter with nistune? 9 second zeds on stock ecu. Until you are running deep into the 12's with stock intercoolers/stock injectors/dumps/midpipes I dont believe your money will be well spent on an intercooler upgrade. im talking about drag/spurts in the country not circuit racing. I have gone from greddy ebc2 to hdi evo and now im going to the hallman pro x (manual boost controller) you should look at the hallman pro x. looks at some water/meth injection setups for some piece of mind or boost increase pre/turbo just my 2 cents.
That's pretty impressive if Nistune can run a 9 second zed. TBH I don't yet have a lot of knowledge/experience with zeds, the above is all general in nature. As said it varies from car to car. Personally though if you're going to the expense of multiple upgrades to run E85, I'd still be runnig a full ecu, I haven't had a close look at Nistune yet but I'm sure there's a lot you can't do with it. From what I've read I'll most likely be running Nistune initially at least (circuit racecar).
yeah I have no experience with E85 either! wish i could but its not available at the pump in perth. There is alot you cant do with it and the resolution isnt that great but for the average punter it is awesome. good luck with the circuit racing should be lots of fun
Yeah E85 is very popular with racecars now, a lot of turbo cars running it as the downsides are very minimal but the upsides in both power increases and engine safety are very good, and it's cheap, especially compared to high octane race fuel!
