Turbo manifold - T3/T4

boost comes on hard at about 3500-4000rpms, and makes you crap yourself. 14psi on a 53lb/minute wheel, in a 3800lb car makes for some strange emotions. Also, we here at Tuning Grppe decided that we hate throttle by wire.
 
ok, so we are still trying to figure out why the throttle plate is prematurely closing under boost, which caused some massive surge, and popped the turbo.
 
yeah, mainly because the surge was so strong when the throttle plate would close under boost rapidly, plus the bov not opening, because its too small or something, it caused the nut on the compressor wheel to spin off, then you can imagine the carnage from there. We are back together now, so were waiting for more road tuning. 796cfm turbo = metric s*** ton of air to blow through the system. Boost comes on hard at 3500-4000rpms. Crazy crazy!


Jimmy
 
yeah, mainly because the surge was so strong when the throttle plate would close under boost rapidly, plus the bov not opening, because its too small or something, it caused the nut on the compressor wheel to spin off, then you can imagine the carnage from there. We are back together now, so were waiting for more road tuning. 796cfm turbo = metric s*** ton of air to blow through the system. Boost comes on hard at 3500-4000rpms. Crazy crazy!

??? CFM? Who rates a turbo in CFM? Which turbo is this? How about the BOV?
Unless that was a T-60 and the BOV is a flexible drinking straw, you have one seriously cheap turbo there.
 
no no no, we dont do that stuff here, especially when our friends at cp-e are working on a solution right now ;)

Probably a crazy question but, do you guys think it wold be possible to run a regular old school cable throttle on the ms3/ms6?
 
??? CFM? Who rates a turbo in CFM? Which turbo is this? How about the BOV?
Unless that was a T-60 and the BOV is a flexible drinking straw, you have one seriously cheap turbo there.

Ummm, CFM is way more important than psi. Psi is just easier to measure, and if you understand your turbo, it gives you a good refferance point as to how much extra air you're pushing through. Our turbo can achieve 19psi, but since it's so small, that makes it max out around 350-400cfm IIRC. The whole point of throwing a bigger turbo on a car is to increase the volume of air going through it, not necessarily the pressure. The most drivable big-turbo upgrades I've ever seen for any car have been relatively close to stock pressure levels. However, with the bigger turbo/ic/piping/tb/im, the volume of air going in pretty much doubles.
 
I was surprised to hear that as well, as I was giving reference to actual turbo output. Compressor is a 59mm, what are you getting at? Is this another post where you talk to us like were 6 years old again?
 
Ummm, CFM is way more important than psi. Psi is just easier to measure, and if you understand your turbo,

CFM is only half of the flow equation. That is why I was questioning it.
You don't rate a turbo in CFM. You rate it in pounds per minute.
CFM is not mass flow, it is volume, which is a meaningless number in forced induction since there are temperature deltas.
PSI is a symptom of flow and even less useful.
Like a dyno chart, PSI is just a way to sell stuff.
 
Hey fabricators........have u ever thought about making a tubular manifold for the V6 guys? i think you could get some good business. i know i would buy one. im trying to peice together turbo stuff now for my 6.
 
New news is that the car is running with a .25bar spring, and is running at closer to stock speeds, just so the car can be mobile. We are trying to figure out what to do in the meantime.

Jimmy
 
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