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  #16  
Old 31-03-2017, 03:50 PM
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They said they normally see a 30% drop from their calibrated engine dyno to what their RR reports....

Not sure I believe what that implies, but yes must be north of 250 and it's going to make plenty when I sort the misfire out!
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  #17  
Old 31-03-2017, 04:14 PM
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I didn't get a graph, just had a quick spin, a peak power number, confirmation it's not pinking and confirmation of how my AFR gauge compares to a more pro setup.

So- I have one point for my graph: 210 bhp at wheels @ about 6500 😀
What's your engine setup out of curiosity Jon?
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  #18  
Old 31-03-2017, 05:28 PM
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Rolling roads

If you've got the patience, Woody, i's all in here.

My "L29" build.

https://r.tapatalk.com/shareLink?sha...3&share_type=t

It's basically an F54 L28 bored out to 88.5, forged rods & pistons, balanced etc and a P90a head head quite heavily modified with a big cam.
Oh, 280zx distributor & Dellorto DHLA 45s with 39mm chokes.
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  #19  
Old 31-03-2017, 06:55 PM
franky franky is offline
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Nice that it hits it at 6500rpm. Does it drop off Sat that point?

I dream of an engine with a peak at 7200rpm, that just flats out to 7700rpm limiter.
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  #20  
Old 31-03-2017, 07:01 PM
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Yeah it's still building right up to the misfire - it's like a rev limiter. I'd settle for a 7200 peak, but I'd like a little more. They sound brilliant with lots of revs.
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  #21  
Old 31-03-2017, 08:29 PM
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They sound brilliant with lots of revs.
Takes all sorts...
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  #22  
Old 31-03-2017, 08:48 PM
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Sounds like a very healthy number Jon.

I've got no graphs as it was all over a bit too soon but here's what I picked up from the dyno display I was watching. In 5th gear at 81mph and a tad over 3k it was producing 19hp to turn the rollers and maintain that speed. On the first and only power run as the revs passed 3.5k it was making 230ish HP and over 250ftlb's. This is were the turbo just starts to make boost. The turbo can produce 650hp and that's just about the safe limit of a standard engine. We discussed a strategy and its along the lines of, HP in the mid 500's. Run a little richer than normal (11.8ish AFR) to allow more advance on boost. Avoid making too much heat. Run a very soft wastgate spring and control the boost with 2 solenoids so I turn it right down to NA if I want. Although I want the car to be quick, I don't want an animal that's a handful on the track.
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  #23  
Old 31-03-2017, 09:32 PM
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500 should be sufficient for a while I'd think.
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  #24  
Old 01-04-2017, 10:35 AM
franky franky is offline
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Originally Posted by jonbills View Post
Yeah it's still building right up to the misfire - it's like a rev limiter. I'd settle for a 7200 peak, but I'd like a little more. They sound brilliant with lots of revs.
Sounds like a good fun engine. Looking forward to seeing the curve now its fixed again.
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  #25  
Old 02-04-2017, 10:41 PM
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Originally Posted by jonbills View Post
If you've got the patience, Woody, i's all in here.

My "L29" build.

https://r.tapatalk.com/shareLink?sha...3&share_type=t

It's basically an F54 L28 bored out to 88.5, forged rods & pistons, balanced etc and a P90a head head quite heavily modified with a big cam.
Oh, 280zx distributor & Dellorto DHLA 45s with 39mm chokes.
Sounds right up my street! It's being added onto the watch list

Must sound fabulous at maximum attack!
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