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Thread: Some may find this interesting, some wont. here's my hack job turbo/m90 setup

  1. #1
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    Some may find this interesting, some wont. here's my hack job turbo/m90 setup

    I'm only about 8 years late to my own thread from where I wanted to do a turbo/m90 setup.

    Aside from needing to make an actual pipe from the blower outlet to the return plenum this setup is ready to hit the road.

    Who knows, maybe in another 8 years Ill actually hit the track with this setup.

    I went to my local track a few months ago with the turbo setup. Best this car has gone on turbo alone was 14.1 at 106mph 2.5 60 foot. 10 psi and 15 degrees of (actual) timing. Maybe the blower will help the 60 foot. Maybe not... yep.


    https://youtu.be/6vLT_kHJe2M

  2. #2
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    What happened to intercooler ? What is target boost at supercharger inlet ?

    David
    1991 SC AOD 4.2..2.3 Whipple..........10.910 @ 125.61
    2016 SRT Challenger Hellcat.............10.597 @ 135.78

    My Garage

  3. #3
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    No intercooler just water/meth. The silicon coupler from the outlet to the return plenum will be stainless pipe. I have one tack welded together from a dozen or so pie cuts.. I need to finish the welds.

    Wastegate is referenced off of the compressor housing so it will be targeting 10psi. The m90 pulley system is stock so that should be around 10psi. Just stabbing the throttle in park netted around 9 psi so I am assuming the m90 boost pressure will be around there within a psi or so.

    Whether 10+10 = 20 or not will be found out.

    Really my torque converter is too tight to spool the turbo off the line, I had the supercharger laying around so yeah.. that's how this came about.

  4. #4
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    Is this a Mustang 3.8 or an SC transplant?

  5. #5
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    Quote Originally Posted by potshotscott View Post
    Is this a Mustang 3.8 or an SC transplant?
    01 3.8 block, 93 sc heads, 94 sc crank.. not that there's anything special about those years, just happened to be what I had at the time.

  6. #6
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    There will be a compounding affect, ie 10+10 will not equal 20 but will probably be much more. Really it depends on the size of the turbo.

    I want to do the same thing on my junkyard car and run the turbo at something modest like 5 psi.

    You should consider going to E85 or even straight methanol since you have got rid of the intercooler, there is going to be a whole lot of heat.

  7. #7
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    I found this on an SVT site. It came from the internet so it must be legit, at least that's what I'm going to assume.

    It's a boost reference chart for the result of turbo psi + supercharger psi.

    So with my 10lb wastegate and 10lb pulley system, this should be in the 26-28psi area give or take a psi.

    That would actually be ideal. As for e85 and meth I already have that going. E85 from the pump which is generally high e70s and water/meth.

    Anyways this will be my last post in regards to this thread for a bit. Take it easy.

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  8. #8
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    Quote Originally Posted by fasterthanyou View Post
    It came from the internet so it must be legitName:  compoundboost.jpg
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    Everyone knows that everything you read on the internet is true!

  9. #9
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    Quote Originally Posted by fasterthanyou View Post
    I found this on an SVT site. It came from the internet so it must be legit, at least that's what I'm going to assume.

    It's a boost reference chart for the result of turbo psi + supercharger psi.

    So with my 10lb wastegate and 10lb pulley system, this should be in the 26-28psi area give or take a psi.

    That would actually be ideal. As for e85 and meth I already have that going. E85 from the pump which is generally high e70s and water/meth.

    Anyways this will be my last post in regards to this thread for a bit. Take it easy.

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    In Texas the E85 ranges from low 70% right up to mid 80% ethanol content. For the way I use it, it does not seem to matter much, the tuning window is much wider with ethanol. I have the knock sensor unplugged and just use an Innovate wide band O2 sensor and fuel pressure to tune AF ratio.

    It made a huge difference in how cool my car runs.

  10. #10
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    I doubt anyone here has deleted their intercooler but on the off chance anyone here has, how have you gone about controlling air charge temps?

    I assumed meth would be the golden ticket, like a magic pill that cures all ailments. I was wrong.

    Just quick 3 second blips at 50-60% throttle cause air charge temps to rise over 210 degrees farenheit. I installed the largest meth nozzle and lowered the meth activation to trigger at just 1 psi to no avail.

    I do not want to install an intercooler but I may end up having to do that. Should I consider adding a 2nd meth nozzle?

    What are normal air charge temps for super coupes?

    Finally, to follow up with the boost chart from the cobra site, that chart was spot on. I am seeing a total of 29psi with the turbo/m90 combo. It surprised me to see 29lbs at just 3400rpm. Everything was just in 1st and 2nd gear as I was simply driving on side streets to get data and make sure nothing would break while on a major road.Name:  20191111_171943.jpg
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  11. #11
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    What are normal air charge temps for super coupes?
    On my '90 Anny, I run a dual needle gauge that tells me air temp in & out of the IC... let's say as a general example, at 210~230 in, I see 90 out. Hot day, hard pull, 7" IC fan on, I see 110 max out. I also run a narrow A/C condenser that allows fresh air direct to the IC.

    We're told that "timing starts to get pulled at 120F and will have a full 8 degrees by the time you hit 180."

    I seriously doubt you'll get where you need to be on meth alone...
    Last edited by KMT; 11-11-2019 at 07:40 PM.

  12. #12
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    Quote Originally Posted by KMT View Post
    at 210~230 in, I see 90 out. Hot day, hard pull, 7" IC fan on, I see 110 max out.

    I seriously doubt you'll get where you need to be on meth alone...
    Is this with a stock intercooler and stock piping or do you have a front mount?

    I agree with you on meth not being up to the task of bringing the air temps down to low 100's from the low 200's. I don't have an air temp sensor before the m90, I am interested if the meth is even doing anything for cooling. At the moment I am going on the assumption that it's at least doing something since 29psi through a roots blower should, in theory, be well into the 300 degree territory if you use the 10* per psi rule of thumb.

  13. #13
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    Is this with a stock intercooler and stock piping
    Stock IC and as I said, narrow condenser so the IC's airflow isn't double-stacked; stock IC tubes w/teflon gaskets, with a small patch of fabric heat shield on the return where it passes the exhaust manifold; 7" IC fan, MP raised top, 7% SC pulley, no cats, 13lbs boost on stock gauge.

    I've run a total of 12% via an aluminum 5% jackshaft pulley, but with 15lbs. boost and incoming air temps at the IC hitting 275, I decided to do my otherwise stock motor a favor, avoid off the slippery mod/on/mod slope, and stick with just the 5% SC pulley, instead.

    And on the topic of the stock intercooler, and projected gains from something larger, see: http://www.sccoa.com/articles/cwintercooler.php
    Last edited by KMT; 11-11-2019 at 11:05 PM.

  14. #14
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    That link provides good information. Thanks for sharing, KMT

  15. #15
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    Quote Originally Posted by fasterthanyou View Post
    That link provides good information.
    And just as a point of reference, that article and the raised top on my SC are both from the same individual, Charles Warner / Magnum Powers https://magnumpowers.com/ , also located here in Oregon.

    Ken

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