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Old 09-01-2010, 12:46 PM   #1
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Default 1991 with JR SC. 70,000 original miles on motor - worth it?

I found a clean 1991 miata with a Jackson Racing supercharger. Comes with the intake, Jackson Racing header, cat-back (I forget the brand), and a few other tiny goodies. He said he's running 9psi non-intercooled from the original 5psi (went with a smaller pulley). He was asking 5k but the top will need to be replaced soon, so he said 4200. The hood/trunk have walnut damage from a tree, but that's aside from the point. This has been supercharged since 94, always ran synthetic IIRC, and the motor hasn't been rebuilt. Also, it's not a SNC vin number, so that's a plus. I'm curious as to what kind of power this is putting down, and if it's reliable/worth the purchase.
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Old 09-01-2010, 12:48 PM   #2
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probably like 130rwhp.
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Old 09-01-2010, 12:50 PM   #3
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Would that increase if I go the intercooled route?
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Old 09-01-2010, 12:51 PM   #4
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it takes an mp62 with 16psi and e85 to make 190rwhp on a 1.6L SCer setup...

buy it, sell the SC and then turbo it properly
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Old 09-01-2010, 12:52 PM   #5
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Hmmm... turboing (as I have been told) is quite the hassle to tune though.. I would love to go the GT28 route though.
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Old 09-01-2010, 01:49 PM   #6
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Quote:
Originally Posted by Braineack View Post
it takes an mp62 with 16psi and e85 to make 190rwhp on a 1.6L SCer setup...

buy it, sell the SC and then turbo it properly
this!

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Originally Posted by Si Speed 317 View Post
Hmmm... turboing (as I have been told) is quite the hassle to tune though.. I would love to go the GT28 route though.
No
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Old 09-01-2010, 02:44 PM   #7
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Hmmm... turboing (as I have been told) is quite the hassle to tune though.. I would love to go the GT28 route though.
Please explain why adding more air via a turbo is any different tuning than adding more air via a SC.

I'll wait.
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Old 09-01-2010, 02:56 PM   #8
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it takes an mp62 with 16psi and e85 to make 190rwhp on a 1.6L SCer setup...

buy it, sell the SC and then turbo it properly
no it takes a real ecu and not a piggy back.

anything sc is worthless on this site to all these turbo guy unless your me =D
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Old 09-01-2010, 02:58 PM   #9
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No
So easy, a caveman can do it.

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no it takes a real ecu and not a piggy back.

anything sc is worthless on this site to all these turbo guy unless your me =D
That's cause you blow Hustler.
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Old 09-01-2010, 02:59 PM   #10
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I just remember it took soflarick a **** ton of effort to break 170rwhp with his jrsc on a 1.8L...IIRC he was on e-manage blue
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Old 09-01-2010, 03:07 PM   #11
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I just remember it took soflarick a **** ton of effort to break 170rwhp with his jrsc on a 1.8L...IIRC he was on e-manage blue
Didn't he end up with an S4?
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Old 09-01-2010, 03:13 PM   #12
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yeah hes running a 2871 setup now.

http://forum.miata.net/vb/showthread.php?t=211180
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Old 09-01-2010, 03:28 PM   #13
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IIRC he was on e-manage blue
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no it takes a real ecu and not a piggy back.
what did i say about piggy backs? granted it's more ecu then any other piggy back but still a piggy back.

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Originally Posted by Si Speed 317 View Post
Hmmm... turboing (as I have been told) is quite the hassle to tune though.. I would love to go the GT28 route though.
sc is harder to turn at idle but after that same as a turbo
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Old 09-26-2010, 10:34 PM   #14
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Do it right, go turbo from the start. Either pick up that car (assuming it has decent suspension, wheels/tires, etc) or find another. Plus, if you are looking to make higher power...that rear end might not be up to the challenge. This is coming form a guy that has a 1.8 and a M45...making a earth shattering 150 whp. There are better deals out there.
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