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> Curious what you all think of this dyno read out?
Tdskip
post Sep 20 2021, 01:02 PM
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Several twists and turns I’m getting close to getting that XN turbo big bore engine back to me. This is the one that had a very elaborate homebrew turbo set up turns out was only running on three out of four cylinders when I did the initial teardown. I ended up having to swap the case out for another one because when it was rebuilt for the first time it was developing crazy high will pressure hand given all the unknowns and some funkiness with it that we discovered we decided it would be better to just use another case

Shop let me know going in the carbs I gave them would be snappy and responsive but probably leave horsepower on the table. The shop also noted that this was not run using optimized headers and exhaust is probably a bit restrictive for this sort of build.

Thing that really jumps out to me here is that the engine is making lotta torch, or at least seems to be a lot of work, down low and had a very usable or p.m. That, to my son white uneducated eyes, suggest that should be fun for regular street use. What do you all think?

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jd74914
post Sep 20 2021, 02:07 PM
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Did you keep the original heads?

Seems like the it's quite restricted given how flat that curve is.

I'm not totally in the flat torque curve makes it more fun camp though-you tend to end up with rough neck-snapping type of shifts* because your tractive force (what the tire is actually putting to the pavement) curve gets pretty wacky. Later tonight I'll see if I can pull your curve into a spreadsheet to show.

*when shifting agressively
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Posts in this topic
Tdskip   Curious what you all think of this dyno read out?   Sep 20 2021, 01:02 PM
SirAndy   Curious what you all think of this dyno read out?...   Sep 20 2021, 01:12 PM
Tdskip   Curious what you all think of this dyno read out...   Sep 20 2021, 01:19 PM
mepstein   Curious what you all think of this dyno read out...   Sep 20 2021, 02:15 PM
SirAndy   [quote name='SirAndy' post='2946967' date='Sep 20...   Sep 20 2021, 04:18 PM
jd74914   Did you keep the original heads? Seems like the ...   Sep 20 2021, 02:07 PM
rhodyguy   What is the displacement of this engine? Still nor...   Sep 20 2021, 02:27 PM
Tdskip   Thanks for all the responses and discussion. This ...   Sep 20 2021, 02:48 PM
VaccaRabite   Thanks for all the responses and discussion. This...   Sep 21 2021, 02:31 PM
windforfun   https://www.caranddriver.com/news/a15347872...the-...   Sep 20 2021, 04:40 PM
Tdskip   Thanks - apparently will have the first 914 Diesel...   Sep 21 2021, 07:34 AM
Chris914n6   Shop was right about the carbs, you ran out of air...   Sep 21 2021, 01:51 PM
rhodyguy   Esp if they have 28?MM Venturi. Spring for some he...   Sep 21 2021, 01:56 PM
JmuRiz   Something is wrong with the graph, how does it not...   Sep 22 2021, 07:33 PM
targa72e   data is not correct in graph. If you have 162Ft/lb...   Sep 22 2021, 07:59 PM
Tdskip   data is not correct in graph. If you have 162Ft/l...   Oct 2 2021, 06:06 AM
PlaysWithCars   data is not correct in graph. If you have 162Ft/l...   Sep 22 2021, 11:07 PM
Rufus   Agree with the others. Something’s fishy about t...   Oct 1 2021, 06:11 PM
Rufus   [quote name='Tdskip' post='2946965' date='Sep 20 ...   Oct 1 2021, 06:36 PM
Rufus   Quoting Tdskip: “… a very elaborate homebrew t...   Oct 1 2021, 10:40 PM
Tdskip   Quoting Tdskip: “… a very elaborate homebrew ...   Oct 2 2021, 06:01 AM
Gatornapper   While we are displaying Dyno readings, anyone have...   Oct 2 2021, 06:55 AM


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