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TSE EFR 6758 & Supermiata engine

 
Old 03-02-2017, 06:08 PM
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Default TSE EFR 6758 & Supermiata engine

This is an early tune on a package Andrew and I put together for a customer a while back. Customer has someone else tuning it so I don't have many details.
This build is safe to a sustained 8500rpm/transient 9000rpm but a bit of boost creep cut the tuning session short.
We expect it will make ~370whp out to 8400rpm. Basically a 3000rpm powerband. Who needs gears?
1884cc, CNC head, +2 valves, Tomei Cams, Moldex billet crank, MS3 Pro, 36T trigger wheel, E85 etc. This build was pretty much "all the things"
Customer prefers to remain anonymous, but he is our hero.

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Old 03-02-2017, 06:17 PM
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on e85? what compression if willing to divulge
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Old 03-02-2017, 06:19 PM
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Originally Posted by psyber_0ptix View Post
on e85? what compression if willing to divulge
9:1
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Old 03-02-2017, 07:09 PM
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Is that +2 on intake and exhaust?
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Old 03-02-2017, 08:48 PM
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Originally Posted by miata2fast View Post
Is that +2 on intake and exhaust?
+1 intake, +2 exhaust
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Old 03-03-2017, 01:10 AM
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Me likey. How much boost?
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Old 03-03-2017, 09:55 AM
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Dunno
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Old 03-03-2017, 09:57 AM
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Thought the 4th parameter was some sort of boost reading. Just didn't know how to understand it.
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Old 03-03-2017, 11:21 AM
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Evidently wasn't hooked up, thus the flat line. 6758 is pretty efficient well past 3:1 pressure ratio, so like 28psi at sea level. The Supermiata CNC head with big valves and these cams reduces pumping losses quite a bit. The C30-74 Rotrex, rated at 300 bhp we built a few years ago with the same head made 300 whp on 9.8psi. To date, I have never seen a higher whp dyno for a C30-74 on any engine. The EFR 6758 can make 450bhp on the right engine. That all factored in, I'd be surprised if this was more than 20psi.
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Old 03-03-2017, 11:22 AM
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Cool. Thanks for the insight.
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Old 03-04-2017, 01:33 PM
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Originally Posted by aidandj View Post
Me likey. How much boost?
allofit
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Old 03-04-2017, 08:17 PM
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When are CNC heads back? I have a core, and had bought some valve train recently but the listing was out of date and removed after an inquiry.
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Old 03-04-2017, 10:16 PM
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Originally Posted by psyber_0ptix View Post
When are CNC heads back? I have a core, and had bought some valve train recently but the listing was out of date and removed after an inquiry.
Discontinued. Google Keegan Engineering.

As your next question is why, the answer is unpredictable supply chain meant leaving customers hanging too often. Same reason we stopped offering complete engines.
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Old 03-04-2017, 11:30 PM
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was it tuned to keep torque down on the low end? trying to understand the funkiness going on below 5k
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Old 03-04-2017, 11:39 PM
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Originally Posted by emilio700 View Post
Discontinued. Google Keegan Engineering.

As your next question is why, the answer is unpredictable supply chain meant leaving customers hanging too often. Same reason we stopped offering complete engines.
Are you saying Keegan is the guy to blame for the unpredictable supply or he is the guy to look to for proper engine work?
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Old 03-05-2017, 01:41 AM
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FML I knew I should have picked one up to have on the back burner. Dammit.

Their site and FB looks defunct.
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Old 03-05-2017, 02:45 AM
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https://www.edmunds.com/mazda/mx-5-m...ting-tech.html

Keegan Engineering was the ones doing the CNC heads for 949. AFAIK it was the head porting that was used on one of 949's National Championship cars, but turned into CNC. Talk to them if you want a good ported head.
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Old 03-05-2017, 06:25 PM
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Yes, I know who Keegan is. Emilio has mentioned him multiple times in the past and I read that Edmunds build in the past, as well. Keegan always had the reputation of great work, but nearly always way late.
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Old 03-05-2017, 06:27 PM
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So you just answered your own question....
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Old 03-06-2017, 11:03 PM
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I speculated with 2nd-hand information on both points, so not really. Emilio hasn't answered, though, so I don't imagine he will.
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