Typical Boost Response/Stock Turbo?
Jul 22, 2013, 07:51 PM
#16
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I know my 05 doesn't tend to really pull until the RPMs hit around 3000 on my stocker. Hallman MBC, Injen intercooler piping and a Buschur TB are on mine. I don't think it's too out of the ordinary. Then again, one hundred degree weather doesn't help either.
Jul 24, 2013, 09:16 AM
#17
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This was taken from a second gear roll at 3000RPM on dead level ground. The car is catless ( albeit with a factory downpipe and catback). Car also has an AMS LICP. Listen to the sound the car makes when I floor it, and watch the boost gauge sweep. If you stop the video when the boost gauge is pegged around 23psi the car is approaching 4500rpm. Late spool? Watch it full screen and in HD.
Last edited by Ricoswave; Jul 24, 2013 at 10:08 AM.
Jul 24, 2013, 12:28 PM
#20
It's worth it. I'm not modding or tuning until I can properly monitor and log AF and boost. Putting on the Omni confirmed my suspicions about my spool. Now I can make changes and actually tell if they're having a positive effect.
Get a Tactrix and an Omni. Setup is easy.
Get a Tactrix and an Omni. Setup is easy.
Jul 28, 2013, 04:59 PM
#23
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Yeah man. I think I am just going to go ahead and put a full exhaust on it and get it back to the tuner and see if it comes around. I just feel like it is way too lethargic from a 3000rpm roll in that low of a gear.
Jul 28, 2013, 05:25 PM
#24
Well to be honest the turbo needs to have the free flow coming in to get the full effect. The turbo is basically fighting with itself.
The bigger the exhaust the less time it will take to spool compared to it not being able to work more efficiently. Change the exhaust to a full 3 you'll see the difference in spooll.
I think you are reading into it a whole lot more than needed. Basically, if the exhaust outlet is to small then the exhaust can't go anywhere putting pressure on the wheel, slowing it down. If there is less restriction right off the wheel, then it will flow more freely and be able to expel more exhaust gas. This is what I read from another person from a sr20 forum it makes sense to me.
Last edited by impact blue; Jul 28, 2013 at 05:30 PM.
Jul 28, 2013, 05:31 PM
#25
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I agree that the spool will be better with an upgraded exhaust, I don't doubt that. The point is that I feel like there is something wrong with my car when it falls flat on its face from a 3000rpm roll in second gear with a stock turbo..........I would expect this kind of lag from a bigger turbo not the stock setup. I shouldn't have to upgrade the exhaust for the car to boost properly. Just listen to the car when I drop the hammer, it has literally NOTHING from 3000rpm. If this is normal that is fine, but I don't like it. At all.
Jul 28, 2013, 07:14 PM
#29
You're spool is normal. Remember we don't have a tiny stock dsm turbo, ours is a bit bigger. You wont get instant response like you're looking for. Below is a vid after I installed a perrin filter. It spools slightly quicker now with a 3-port than in this with the stock bcs. You'll get the idea though. It is second gear, I let off at 4200.