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Old 04-02-2014, 02:14 AM   #1
your_muda
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e30 turbo

alright so my plan is to boost my e30 but i have a few crucial questions that some of you turbo wizards will hopefully be able to answer…
i have an 86 325e eta, with the 'i' head swap… it was just rebuilt but has all stock internals. i have a Holset H1C turbo

-will i be able to run boost on this set up safely?
-if so how much boost is safe for daily and whats my limit?
-is the DIY PNP mega squirt capable for my set up? is it difficult to tune?
-what should i do with the stock MAF?
-where should i put my oil feed and return lines?
-what rear end should i use?

and if you turbo yotas have any more insight please feel free too add!
thanks for the help!
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Old 04-02-2014, 02:23 AM   #2
e30_kid89
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-Yes, depends on install quality and tune quality
-Depends on fuel type used and your setup.
-Yes, and if you nothing about EFI then yes it is very difficult
-You mean AFM? Set it on fire then throw it off the Burlington skyway
-With some research your'll be able to figure this out on your own.
-Boils down to your preference.

Hit up e30tech.com's forced induction section and start reading. Lots of info about the turbocharging the m20 there.
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Old 04-02-2014, 01:44 PM   #3
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[quote=e30_kid89;1643247]-Yes, depends on install quality and tune quality

what would you say defines whether i have a quality setup or not?
and thanks for the other info!
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Old 04-03-2014, 01:34 AM   #4
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First explain what you want out of this project ... Then we can give you an answer...
But regardless if your going turbo I would suggest a stand alone system ... And stick fireworks in the AFM and set them off..
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Old 04-03-2014, 07:46 PM   #5
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well I guess my goals are to push about 300 whp while maintaining a reliable daily/weekend warrior.
that being said what do y'all think is going to decide whether or not i reach my goals.
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Old 04-03-2014, 08:50 PM   #6
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OK cool so we have similar ideas ... You will prob need to run 12-15lb of boost depending on how well it works, ARP studs are a good/necessary investment... Running turbo anything on a track I would run a standalone ecu, megasquirt is a decent choice because most people can tune it.. Which also makes converting to use a tps and air intake temp sensor easy.

As for rear end I would say anything but a 4.10...
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Old 04-04-2014, 05:16 PM   #7
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why wouldn't you use a 4.10? what would you rather instead? and any tuning shops in the hamilton area you would recommend?
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Old 04-04-2014, 05:28 PM   #8
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why wouldn't you use a 4.10? what would you rather instead? and any tuning shops in the hamilton area you would recommend?
PM NOTORIOUS VR. Awesome tuner because not only does he know how to safely make power but he is also an expert in engine management and internal combustion theory so your car won't just be a dyno queen but will have stock-like driveability. My car makes like 900hp and at low speed and load it idles and transitions like stock. He also won't take you to the cleaners with prices and stands by his work.
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Old 04-05-2014, 12:39 AM   #9
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Originally Posted by BigD View Post
PM NOTORIOUS VR. Awesome tuner because not only does he know how to safely make power but he is also an expert in engine management and internal combustion theory so your car won't just be a dyno queen but will have stock-like driveability. My car makes like 900hp and at low speed and load it idles and transitions like stock. He also won't take you to the cleaners with prices and stands by his work.
+1

And a 4.10 just makes first gear too short and useless
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Old 04-05-2014, 02:33 AM   #10
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thanks guys this is all really good helpful info! I'm hearing a lot of people say that using the holset h1c will result in a lot of lag…. is this true?
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