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Solo_S14

NA8 Stock WHP?

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Rather than get a bunch of opinions on the internet, I'll come here to get a bunch of opinions on the internet 😂

My personal experience - put my stock motor NA8 on the dyno with basically no mods and made 108whp.

I was under the impression that was kinda low, partially based on the (TT6?) guys all running ~128whp with apparently stock internals.

However, talking to a few guys in passing, they seem to have had similar ~110whp results. (Dyno Jet).

So for those of you that have been into TT / SM recently.....what's a reasonable number for a stock motor NA8 on say the 14deg timing trick and stock ECU?

Cheers,

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If you're using the NA8 head I left with Sam that's my old ~65k orig miles head, made 125whp on it with intake, header, exhaust and MS3. It makes garbage power compared to your typical SM head (ex. xfactor).  With cams could probably hit mid 130s without too much fuss. On stock intake/header/ecu all you can do is static timing bump and adjustable AFR, but wouldn't expect more than 115whp or so without a good head.

 

*124

 

FB_IMG_1597049253103.jpg

 

And here's current motor (BP4W) on same intake, header, exhaust, MS3 with BP5A intake cam.

 

FB_IMG_1597049374088.jpg

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Thanks man.  There was a head kicking around somewhere along the way, but it had a valve seat broken out of the casting of the head so it was junked.

The 108 was on the engine that came in my red car, unknown swap basically, stock intake, header, ecu.  So the ~115whp limit sounds like the answer / bridge I was looking for, for a healthier stock motor without ECU and supporting bolt ons.

This is a capture from a video since they never actually sent me the file, and we didn't really care just wanted a baseline:

IMG_6418.thumb.jpg.6134fcaa83ec18f6ca69af096b8396f5.jpg

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1 hour ago, Solo_S14 said:

Thanks man.  There was a head kicking around somewhere along the way, but it had a valve seat broken out of the casting of the head so it was junked.

That was the Ed Gilfus head that lived in the car during its life in SM.

 

I actually have Cobb's head in the garage still, I think. Or maybe it's a BP4W head. I don't know. I'll check.

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2 hours ago, Solo_S14 said:

Thanks man.  There was a head kicking around somewhere along the way, but it had a valve seat broken out of the casting of the head so it was junked.

The 108 was on the engine that came in my red car, unknown swap basically, stock intake, header, ecu.  So the ~115whp limit sounds like the answer / bridge I was looking for, for a healthier stock motor without ECU and supporting bolt ons.

This is a capture from a video since they never actually sent me the file, and we didn't really care just wanted a baseline:

 

You can see part of the problem on the AFR readout. 12 is low boost turbo territory. Timing bump and 12.5-8ish would unlock some power right off the rip. Stock ECU runs pretty lean until ~4.5k and then too rich.

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1 hour ago, Hollywood said:

 

I actually have Cobb's head in the garage still, I think. Or maybe it's a BP4W head. I don't know. I'll check.

Probably mine if you still have one laying around. Won't make crap for power, but I imagine it's got a lot of track hours left on it if he wants a free head 😛

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I'm at 123hp and a little on my junkyard engine NA8 Spec Miata.. with only a FPR, a SM exhaust and some adjustement by Jim at MSR

 

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Edited by Dennis
added dyno sheet

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that is officially the highest junkyard number I've ever seen. was this east street's junkyard?

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41 minutes ago, Hollywood said:

that is officially the highest junkyard number I've ever seen. was this east street's junkyard?

Can’t afford that junkyard.. just random 500 $ automatic, pulled motor and sold the car.. 100$ Plus some fresh seals invested.. 
 

First engine in the car did 1.5 hp more, with a ESR head on a junkyard bottom, but that one didn’t survive..

 

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Automatic is half point less compression 8.5 vs 9.0, so that makes even less sense.

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1 hour ago, cabowabo said:

Automatic is half point less compression 8.5 vs 9.0, so that makes even less sense.

Thought that was only for the 1.6's? 

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19 hours ago, Dennis said:

Thought that was only for the 1.6's? 

I thought it was NA8, too, but maybe not.

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