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Old 05-06-2007, 12:46 PM   #1
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Question turbo question

i am not sure but is it safe to run 7 psi boost with my stock ratio pistons will i have any problems like blowing the rings or any thing
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Old 05-06-2007, 12:52 PM   #2
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yes.
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Old 05-06-2007, 01:03 PM   #3
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the generally accepted maximum boost level on a stock bottom end is ~15 psi.
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Old 05-06-2007, 01:21 PM   #4
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k thanks i just wanted to clear the up couse one of my friends is pisst i got a turbo and trying to say u can blow your rings and crap with like 7 -10 psi with stock piston ratio and crap
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Old 05-06-2007, 01:24 PM   #5
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since our compressrion ratio is a 9.5:1, you're fairly safe if you do things right.
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Old 05-06-2007, 01:28 PM   #6
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wat would i have to do to play it safe
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Old 05-06-2007, 01:32 PM   #7
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give it a good amount of fuel in boost; with the proper amount timing retard to control knock.
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Old 05-06-2007, 01:32 PM   #8
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Old 05-06-2007, 06:19 PM   #9
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yes you will.. ill post pictures of my pistons later today... cracked the entire side of 3 and 4...
if your going to run 7psi make sure you at least have a dual feed rail and some larger injectors
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Old 05-06-2007, 06:26 PM   #10
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that's the whole "proper fueling and knock control" I'm talking about.
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Old 05-06-2007, 06:52 PM   #11
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Get the air cold and get some fuel to it and you will be good to go.
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Old 05-06-2007, 06:53 PM   #12
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were can i git a dual feed rail
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Old 05-06-2007, 06:59 PM   #13
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make one but it is not neccesarry until 250 or better whp. i dunno why jason suggested it, bigger injectors or more FP will do you just fine read the friggin faq Newb it is all in there trust me.
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Old 05-06-2007, 07:12 PM   #14
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so preety much git more fuel and air and i should be safe
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Old 05-06-2007, 07:17 PM   #15
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no becouse if you read the faq it would explain that with boost comes heat. you need WI or FMIC to controll this heat. If you dont then you will be knocking and destroy your motor. Read the faq it takes about 30-45 minutes/
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Old 05-06-2007, 07:26 PM   #16
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i got every thing i need i got a fmu 12/1 - greddy fmic-fmic piping -5/16 oil return line taped - cold intake- greddy bov
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Old 05-06-2007, 07:32 PM   #17
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sry 5/8 oil return line
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Old 05-06-2007, 07:35 PM   #18
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Where is the bipes? FMIC is not as effective as WI and you will need a timming controller most likely or retarded base timming.
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Old 05-06-2007, 07:39 PM   #19
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bipes?
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Old 05-06-2007, 07:56 PM   #20
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https://www.miataturbo.net/forums/sh...03&postcount=1
it is the first frigin post of the FAQ.
Quote:
Originally Posted by Braineak
The Bipes ACU (Auxiliary Control Unit) dynamically retards the timing of your engine to protect it from detonation or knock. The ACU uses three input parameters to control the timing: Airflow, RPM, and Intake Temperature. You can pull a total of 14° of timing. Not only will you help protect against detonation, or you gain low-end power back if you keep your static timing at 10* or advanced. The Bipes is a proven device in NA, turbo and supercharged Miatas. Aftermarket ECU and “piggyback” usually have this function built in.
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