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Old 08-07-2008, 01:59 PM   #1
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Default Boost Level Survey

Hey all, I will be rebuilding my 1.8 this winter with a friend who is a DSMer. I just want to know what levels of boost people have been able to attain.

Please post a general list of parts on your build that have helped you reach this level. I know people have posted on their various builds. I am looking for some info as to how much air can be crammed into these motors. Please post both 1.6 and 1.8.
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Old 08-07-2008, 02:08 PM   #2
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lol yeah I'll get right on that chief.
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Old 08-07-2008, 02:47 PM   #3
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20psi off a T25 turbo.... methanol injection and intercooler is what keep it running w/ out detonation *shrugs*

worked out for a while now and motor's still running after what...1-2 months? been boosted off 10lbs for approx 2-3 years
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Old 08-07-2008, 02:58 PM   #4
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Yes massa
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Old 08-07-2008, 03:27 PM   #5
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duplicate
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Old 08-07-2008, 03:29 PM   #6
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Quote:
Originally Posted by Big Boy View Post
Hey all, I will be rebuilding my 1.8 this winter with a friend who is a DSMer. I just want to know what levels of boost people have been able to attain.

Please post a general list of parts on your build that have helped you reach this level. I know people have posted on their various builds. I am looking for some info as to how much air can be crammed into these motors. Please post both 1.6 and 1.8.
I think the info you want is only as far away as the search window. Do some research here and you can probably build your own list.

Off the top of my head, up to 12-15 psi reliably with stock internals and good engine management. Beyond that...
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Old 08-07-2008, 03:40 PM   #7
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Big Boy needs big boy schoolin on how to search.

What would happen at your DSM forum if a newb with 20 posts came in with those requests. Info is out there. Look for it a little before posting demands.
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Old 08-07-2008, 03:43 PM   #8
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Quote:
Originally Posted by ZX-Tex View Post
Off the top of my head, up to 12-15 psi reliably with stock internals and good engine management. Beyond that...
I'm upgrading from stock internal. I know that not all of you have stock internals so I figured this would be a good place to gauge what is attainable.

As for engine management, I started my car up for the first time with MegaSquirt at midnight last night.
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Old 08-07-2008, 03:44 PM   #9
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Quote:
Originally Posted by Big Boy View Post
I'm upgrading from stock internal. I know that not all of you have stock internals so I figured this would be a good place to gauge what is attainable.

As for engine management, I started my car up for the first time with MegaSquirt at midnight last night.
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Old 08-15-2008, 12:45 AM   #10
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the miata driveline is the weakest link in my opinion with a built bottom end the motor can handle alot of abuse with the proper engine management and tuning. Tuning is key.
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Old 08-15-2008, 01:41 AM   #11
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^ agree. You'll find the limits of the stock transmission, ignition, and possibly the rear end before needing to worry about stronger reciprocating parts.
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Old 08-15-2008, 10:14 AM   #12
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you obviously have no clue wtf your asking for.
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Old 08-15-2008, 10:19 AM   #13
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Fishin's easy, it's the drinking that's the chore.
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Old 08-15-2008, 10:20 AM   #14
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Right now I have a stock 1.8 and a gt2860rs. I run 32psi. in my tires
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Old 08-15-2008, 10:25 AM   #15
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/\ Subtle......
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Old 08-15-2008, 10:29 AM   #16
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I am currently running 32psi on stock internals, using ITBs and DEI. My stock injectors can cope with the extra fuel needed, since 3 parallel connected Powercards are fixing all the fuel delivery I need. At 322rwhp, the car did get a bit hot in the engine bay, but since I filled it completely with foam, it was OK. Still trying to find a louder blow of valve though… On track I run DIY WI system, with a silicon hose connected from the intake manifold to one of the air vents in the dashboard. If I feel the intake temp go up to high, I just spit in the hose. It was tricky in the beginning, but since I went to an open helmet and added a funnel to the hose, it is all good.
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Old 08-15-2008, 10:32 AM   #17
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I have a gt4817 and run 3psi.
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Old 08-15-2008, 10:36 AM   #18
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Quote:
Originally Posted by Torkel View Post
I am currently running 32psi on stock internals, using ITBs and DEI. My stock injectors can cope with the extra fuel needed, since 3 parallel connected Powercards are fixing all the fuel delivery I need. At 322rwhp, the car did get a bit hot in the engine bay, but since I filled it completely with foam, it was OK. Still trying to find a louder blow of valve though… On track I run DIY WI system, with a silicon hose connected from the intake manifold to one of the air vents in the dashboard. If I feel the intake temp go up to high, I just spit in the hose. It was tricky in the beginning, but since I went to an open helmet and added a funnel to the hose, it is all good.
WTF guys don't listen to this guy he's lying his *** off. He's running 33 PSI, dual DEI, and I think he's got another PC PRO up his sleeve.
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Old 08-15-2008, 10:56 AM   #19
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I'm feeling a slight nice streak atm...

Big Boy... you need to do some homework for this reason.

PSI means nothing really... its power that breaks motors.
A DSM t25 at 10 psi does NOT equal a gt30 at 10psi... they flow different amounts of air and thus make different amounts of power.

You need to look at power levels people break at... not what PSI you can run.

ie: go back an relearn about turbo systems, turbo sizing, power goals, power potential, engine tuning and required supporting mods etc...
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Old 08-15-2008, 12:12 PM   #20
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Quote:
Originally Posted by Splitime View Post
its power that breaks motors.
Some say rpm and tuning, although too much bang in the combustion chamber is certain to kill anything. An engine is only going to rotate so many times in its life before **** gets loose.

threadhijack: success.
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