Curious what you all think of this dyno read out? |
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Curious what you all think of this dyno read out? |
Tdskip |
Sep 20 2021, 01:02 PM
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#1
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Advanced Member Group: Members Posts: 3,686 Joined: 1-December 17 From: soCal Member No.: 21,666 Region Association: None |
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? |
SirAndy |
Sep 20 2021, 01:12 PM
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#2
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Resident German Group: Admin Posts: 41,651 Joined: 21-January 03 From: Oakland, Kalifornia Member No.: 179 Region Association: Northern California |
Curious what you all think of this dyno read out? Shift at 4500 rpm for max acceleration ... (IMG:style_emoticons/default/driving.gif) |
mepstein |
Sep 20 2021, 02:15 PM
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#3
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914-6 GT in waiting Group: Members Posts: 19,279 Joined: 19-September 09 From: Landenberg, PA/Wilmington, DE Member No.: 10,825 Region Association: MidAtlantic Region |
Curious what you all think of this dyno read out? Shift at 4500 rpm for max acceleration ... (IMG:style_emoticons/default/driving.gif) Not necessarily. You may want to go a bit over the max so when you shift, the next gear is closer to the max. It will depend how close the gears are and what you are trying to accomplish. |
SirAndy |
Sep 20 2021, 04:18 PM
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#4
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Resident German Group: Admin Posts: 41,651 Joined: 21-January 03 From: Oakland, Kalifornia Member No.: 179 Region Association: Northern California |
Curious what you all think of this dyno read out? Shift at 4500 rpm for max acceleration ... (IMG:style_emoticons/default/driving.gif) Not necessarily. You may want to go a bit over the max so when you shift, the next gear is closer to the max. It will depend how close the gears are and what you are trying to accomplish. Max *torque* is what you are after. You'll drop about 500 rpm on a quick shift, so shifting at 4500 will put him right back at the torque sweet spot. (IMG:style_emoticons/default/shades.gif) |
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