High compression 916/996 SPS on the dyno - Ducati.ms - The Ultimate Ducati Forum
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post #1 of 23 (permalink) Old May 10th, 2019, 3:06 pm Thread Starter
JEC
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High compression 916/996 SPS on the dyno

Finally got around to putting my high compression 996 "SPS" engine on the dyno.

I was hoping for 130hp... 128.5 is close enough! This was ride in, ride out, no tweaks or tuning to bump up the number. What you see is my daily ride tune for 94 octane pump gas. Pulls hard from 3k to 10k.

Run on a Superflow at 3500 ft/elev.

Specs are 2001 996 engine in my 97 916. Running dual injector TBs from the 996 (parallel injection, not sequential). Has Pistal R2000 pistons, stock bore 1.2mm squish for around 13:1 actual compression. T1 SPS cams set to 110/110 centrelines. Stock 45mm headers, 50mm FBF slip ons. Unifilter foam filters stock location. Light flywheel and slipper clutch but otherwise standard 996 internals with only minor port matching and three angle valve seats, stock valves. Tuned by me.
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'97 916
'06 Aprilia Tuono 1000 R
'84 Honda VF750F Interceptor (gone)
'04 Suzuki SV650 (gone)
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post #2 of 23 (permalink) Old May 10th, 2019, 3:26 pm
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Cool. Thanks for posting.

97 916/996 "The Time Machine"
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post #3 of 23 (permalink) Old May 10th, 2019, 3:51 pm
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Impressive beefy curve, over 125 hp all the way from 9000 rpm and up.

Still in the process of Building my engine with ported 748R heads, will be a lot peakier than yours.

Thanks for the dyno curve


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post #4 of 23 (permalink) Old May 10th, 2019, 4:02 pm
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As I was about to post Im not the guy to post to, then you do this? Gaah
Looks spot on, number is just a number.
NOW Im out
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post #5 of 23 (permalink) Old May 11th, 2019, 9:14 am
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Nice curves!

Tnx for sharing - Nice curves ! :-)
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post #6 of 23 (permalink) Old May 11th, 2019, 10:36 pm
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That's a real nice curve. I noticed how long it maintains the power. The similar build for my 851 peaks higher but earlier (9000-9400) and slowly drops after that. Of course, I have some different parts and cam timing , and I wanted to keep the revs down for reliability.

'01 996R, 851 Adamo/Leoni racebike, '97 900 SS CR, '91 ZX-7R K1 homologation, '89 NSR250 MC18r5k, '01 Derbi GPR50/75,
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post #7 of 23 (permalink) Old May 12th, 2019, 3:54 pm Thread Starter
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Quote:
Originally Posted by nine16 View Post
That's a real nice curve. I noticed how long it maintains the power. The similar build for my 851 peaks higher but earlier (9000-9400) and slowly drops after that. Of course, I have some different parts and cam timing , and I wanted to keep the revs down for reliability.
A lot of that comes down to ignition timing, a steady ramping up right to redline keeps the power flat in that zone. I can only pull that off with 94, my 91 tune had 3-4 degrees less across the WOT range. With the 91 tune it perceptibly drops off above 9.

Two areas I was able to "find" power was A. tuning the cylinders individually and B. completely reworking the timing map.

Those two really help the midrange and part throttle response. These engines like timing, the more you can give them the more power they make, within the detonation limits of course.
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'97 916
'06 Aprilia Tuono 1000 R
'84 Honda VF750F Interceptor (gone)
'04 Suzuki SV650 (gone)
'87 Honda VFR400R NC24 (gone)
'85 BMW K100RS (gone)
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post #8 of 23 (permalink) Old May 13th, 2019, 6:35 am
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how much advance did you end up with?

know all wanker
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post #9 of 23 (permalink) Old May 13th, 2019, 9:01 am Thread Starter
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how much advance did you end up with?
This.
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'97 916
'06 Aprilia Tuono 1000 R
'84 Honda VF750F Interceptor (gone)
'04 Suzuki SV650 (gone)
'87 Honda VFR400R NC24 (gone)
'85 BMW K100RS (gone)
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post #10 of 23 (permalink) Old May 13th, 2019, 9:14 am
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Do you rev this engine to 11k regularly or just for tuning purposes? Does it require often rebuilds if so?


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