supercharging a DOHC GT engine
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Author:  fainya [ Tue Sep 01, 2015 9:16 am ]
Post subject:  supercharging a DOHC GT engine

I am seriously looking for a supercharger for 90 DOHC GT engine running on 98 electronics.
What comes close to working on our engines?

Author:  TheINCRide [ Tue Sep 01, 2015 3:13 pm ]
Post subject:  Re: supercharging a DOHC GT engine

I believe a supercharger from an MR2 is a close fit. It mounts where the A/C compressor would go.

Author:  RP91gt [ Tue Sep 01, 2015 10:16 pm ]
Post subject:  Re: supercharging a DOHC GT engine

Look for the Eaton M10 super charger, on G13b. I remember reading a build here on a green swift. Also on a Eaton M45, don't quote me but i think some Mercedes have a supercharger that has been used on Suzuki g13b. Also the more pricey that will run around 3k, but these superchargers have been proven before. :)

Author:  suprf1y [ Wed Sep 02, 2015 7:14 am ]
Post subject:  Re: supercharging a DOHC GT engine

Just curious, did you get the fuel and timing sorted out on this build yet?

Author:  fainya [ Sun Sep 13, 2015 1:21 am ]
Post subject:  Re: supercharging a DOHC GT engine

As for fuel and timing, Car is getting 37.5 mpg at 70 mph with the A/C on and using the cruise control.
Timing seems to be good enough. No valve rattle under acceleration, no backfire up through intake system
from idle when accelerating. Redline is jut below 7,000 rpm.
I am still playing with the tuning software on my laptop using the ODB2 connector to talk to the cars PCM.
The learning curve on the software is where my time is going.
Since January I have not had a lot of extra time. Shop has been really busy and I am still behind in getting it all done.
The summer heat was killer this year with plus 100 degree days.
I also lost time with getting my younger son shipped off for his 5th deployment to Kawatt.
My newest project has been finding and getting an Ultrasonic cleaning tank big enough to hold heads, blocks, and transmission
cases. I found what I needed but it was not cheap. Simple green did not get all of the varnish off the heads and blocks. I
went with the cleaning chemicals that the tank manufacturer offers. And they do a great job at cleaning the aluminum.
This will take all of the hand scrubbing out of cleaning the parts. It is saving me about 3 to 4 hours on cleaning before
Once I have the numbers on fuel and timing I will pot the results.

Author:  codyb76 [ Sun Sep 13, 2015 11:59 am ]
Post subject:  Re: supercharging a DOHC GT engine

You will likely need to remove your ac compressor to fit a supercharger I suspect, just isn't much room elsewhere.
In my opinion a turbo would be far better in most every way. Bottom end power can be better with a positiv displacement supercharger but that's about it. That said, a turbo g13b with a small turbo pulls hard from 3k on, I don't need to downshift to hang with v8 mustangs at 60-70mph with my car in 5th.

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