2nd Generation Specific 1986-1992 Discussion

Microtech Tuning Help

Old 02-06-2006, 08:08 PM
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i got a s4 tII block that i have fitted with a s5 turbo a greddy front mount IC and a greddy profec b II i am having problems the car idels at 1500 rpm and mis fires i can add some fuel and it smooths out but the idel goes to about 2000 rpm what could it be. and as far as boost goes should the car be able to boost in idel reving the car? because it dosent could the boost controler be to blame? the car is still on stands so its still being worked on thanks in advance
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Old 02-06-2006, 10:25 PM
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Check for vac leaks. Do you have your TPS calibrated correctly? Check your timing (make sure the timing lock is on)



I know with my old RX, I couldnt set the TPS all the way because I had a huge vac leak (bored the TB out too much). So to get it to idle, I had to crank the fuel up.



Boost wise, looking at the output screen on the Laptop software, you might see 1-2 psi with a free rev. An auto-meter gauge will tell you more than that. Since you have a FMIC and a street port, you might not see pressure.
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Old 02-06-2006, 11:27 PM
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Also make sure line going to map sensor comes from primary runners not the secondaries , as that will cause problems.
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Old 02-07-2006, 08:01 AM
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Originally Posted by Nospig' post='799971' date='Feb 7 2006, 12:27 AM

Also make sure line going to map sensor comes from primary runners not the secondaries , as that will cause problems.


Thats also a good point. When I did my setup, I drilled out and tapped a huge banjo fitting for all my vac driven devices. Basically it was another brake line.
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Old 02-07-2006, 07:38 PM
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im gonna check for vac leaks and as far as the tuning aspect goes what should my boost limit be on a stock S5 turbo with 550cc injectors
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Old 02-08-2006, 12:03 AM
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Originally Posted by RX7 13B 4 UR AZZ' post='800126' date='Feb 7 2006, 09:38 PM

im gonna check for vac leaks and as far as the tuning aspect goes what should my boost limit be on a stock S5 turbo with 550cc injectors


With stock fuel pump and fpr?



Just watch your duty cycle as you tune...
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Old 02-08-2006, 02:32 PM
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Originally Posted by 1Revvin7' post='800196' date='Feb 7 2006, 10:03 PM

Just watch your duty cycle as you tune...


You said duty, lol.....





But anyways, just keep an eye on the AFRs and all. The 550cc injectors are good for about 250hp reliably IMHO...this can be argued though. Something about 20yr old injectors scare me though...
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Old 02-08-2006, 02:33 PM
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Oh yea, and on stock turbo w/ fmic... i'd stick around 9.5psi to 10psi...the stockers don't do much for flow past that...
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Old 02-09-2006, 09:29 PM
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ok can some one give me a little info on how to set the timing. i see 2 marks on the main pully and the little prong that sticks out from the front cover at which mark should i put it once i get it there i take the CAS out align the mark on the gear to the one on the housing and thats it or am i missing something?
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Old 02-10-2006, 08:02 AM
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With the microtech, you are suppose to set it 5dbc when you have the timing lock on, which would be the first mark that comes around I believe. Its been a while since I have had to set timing.
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