|
|
Post by midlifecrisisrd on Oct 1, 2020 21:44:16 GMT 1
Evening peeps
Just curious for the guys that have their bikes dyno'd what kind of torque figures are you getting?
Peak hp is one thing but how mucho grunto
Steve
|
|
|
|
Post by stusco on Oct 1, 2020 21:50:32 GMT 1
65hp 35.1lb/ft@9645rpm pv engine ,mick abbey fast road,tsa pipes ,zeel,v force 4 reeds,pod filters,pwk 28 carbs.  |
|
|
|
Post by Tobyjugs on Oct 1, 2020 22:48:33 GMT 1
Ok Here's what i have measured, all on the same dyno bank 350 4LO 68pk 35 ft/lbs @ 9273rpm Same engine & set up, std pipes 49pk 31.7ftlbs @ 7400rpm 398 YPVS pinned valves 71pk 36.1ft/lbs @ 8491rpm 443 Driveline set up 92pk 60ft/lbs @ 8000rpm (Tractor)  |
|
|
|
Post by tipfinchy on Oct 1, 2020 22:50:18 GMT 1
37.6 at 8600
mart
|
|
|
|
Post by JonW on Oct 2, 2020 2:42:27 GMT 1
443 Driveline set up 92pk 60ft/lbs @ 8000rpm (Tractor) there really is no replacement for displacement |
|
|
|
Post by marrcel on Oct 2, 2020 7:24:35 GMT 1
|
|
|
|
Post by marrcel on Oct 2, 2020 7:28:06 GMT 1
52,3 Nm about 40 non metric stone per elbow or whatever 🤪
|
|
|
|
Post by midlifecrisisrd on Oct 2, 2020 9:13:35 GMT 1
443 Driveline set up 92pk 60ft/lbs @ 8000rpm (Tractor) there really is no replacement for displacement Very true Years ago when guys I knew were in the car scene I always said you can't beat cubes One had 2L turbo'd to death Other had 4.8 v8 normally asperated Both around 400hp at the wheels You can guess which was faster Steve |
|
|
|
Post by midlifecrisisrd on Oct 2, 2020 9:19:34 GMT 1
52,3 Nm about 40 non metric stone per elbow or whatever 🤪 That's a really good torque figure out a 350 My 385 is only doing 54.2 nm (41.3 ft lb) Steve |
|
|
|
Post by JonW on Oct 2, 2020 9:22:39 GMT 1
there really is no replacement for displacement Very true Years ago when guys I knew were in the car scene I always said you can't beat cubes One had 2L turbo'd to death Other had 4.8 v8 normally asperated Both around 400hp at the wheels You can guess which was faster Steve I have two 2L turbo cars, both 300bhp but one is 350kgs heavier being more modern. I met up with and drove LB(on this forum) to the old platers we used to use in the slower of them. He drives a 5.7L V8. He was fine with the straight ahead bits where i just booted it, but nearly died when i didnt slow down for the roundabouts... cue much pressing of the pretend passenger brake pedal... ahh, AWD.... But yes, much easier to make power with more ccs |
|
|
|
Post by earthman on Oct 2, 2020 9:35:01 GMT 1
It depends on which car and era you are comparing each of them to I feel, for example, my V6 2.8L 1985 Granada had the advantage cc wise over my 1990 Astra GTE but that certainly seemed quicker in every way and gave better mpg. Engine design moves on over the years of course and those two cars were aimed at a different type of driver in the first place.
|
|
|
|
Post by mouse on Oct 2, 2020 11:20:01 GMT 1
66RWHP 36ft/lbs
Tuned barrels, V force reeds, Mark Dent pipes, 31k carbs and ram air filters
Mouse
|
|
|
|
Post by JonW on Oct 2, 2020 14:06:26 GMT 1
Edited this as its not helping the torque figures discussion. Sorry.
|
|
|
|
Post by Tobyjugs on Oct 2, 2020 14:23:29 GMT 1
I Like this thread and it would be nice if more people could post their engine type and torque figures up big or small it's not important.
It's not about willy waggling. I would like to collect this information and store it under the engine type's for reference.
|
|
|
|
Post by headcoats on Oct 2, 2020 14:54:18 GMT 1
67.91BHP at 10185RPM
35.35 FT Pounds 9795RPM
Mick Abbey Tune TSA pipes VForce 4 PWK 28 carbs Ramairs
|
|
|
|
Post by ringdingding on Oct 2, 2020 16:08:39 GMT 1
Great thread, it would be great if we could have more detail on the actual engine set up as well.
|
|
|
|
Post by midlifecrisisrd on Oct 2, 2020 16:10:37 GMT 1
Edited this as its not helping the torque figures discussion. Sorry. No prob, I was messing my own thread lol Steve |
|
|
|
Post by midlifecrisisrd on Oct 2, 2020 16:22:17 GMT 1
Ok then
385cc (65×58) 1ua barrels ported to suit, recut o ringed head, v4 reeds, 10mm spacers, pwk 28's, drilled airbox, TSA pipes, Zeel
Still running 31k curve but 5 degrees added at 9k. Last dyno'd in Mick's box of smog which does not flatter HP
73hp at 9400, 54.2 nm (41.3 ft lb) at 9300
Really needs a proper ignition map to get the last few ponies out. Running safely rich
Steve
|
|
|
|
Post by howard on Oct 2, 2020 17:48:03 GMT 1
LC with 31k engine, Harry Barlow tune, ignitech, TSA's , V Force 4 , Cool head, standard LC airbox. 31k carbs. the 430 was just being run in so didn't test it.  |
|
|
|
Post by earthman on Oct 3, 2020 19:17:54 GMT 1
I Like this thread and it would be nice if more people could post their engine type and torque figures up big or small it's not important. It's not about willy waggling. I would like to collect this information and store it under the engine type's for reference. Agreed, I'd like to know what a pretty much bog standard 4LO figures are, one's that have just had an engine rebuild/rebore shall we say. |
|
|
|
Post by marrcel on Oct 3, 2020 19:37:41 GMT 1
Ok 31k .5bore cleaned ports and 26,5mm exhaustport, oringed head, GR exhausts, ignitec, stock carbs, vforce4, empty airbox drilled filter retainer, case transfer matching.  |
|
|
|
Post by jon on Oct 5, 2020 18:51:27 GMT 1
I’m quite surprised the biggest carb I’ve seen with peoples setups is a 28mm.
I always thought bigger carbs gave more torque?
Makes me think twice about what to use on my 385 build which is being built for maximum torque, not HP?
I was thinking TMX 30mm, but seems PWK 28 give high torque figures. Even std 31k!? Which was a surprise.
Jon
|
|
|
|
Post by midlifecrisisrd on Oct 5, 2020 19:09:36 GMT 1
I thought big carbs were more for top end 🤔
Steve
|
|
|
|
Post by Gitram on Oct 5, 2020 19:27:34 GMT 1
aye, i always reckoned big carbs were more top end and smaller gave more mid range.. I had a big pair of carbs, somewhere from 30's to 34's, I cant remember, but it guzzled fuel and were swiftly swapped for std lc ones..
marti
|
|
|
|
Post by Tobyjugs on Oct 5, 2020 19:28:37 GMT 1
I’m quite surprised the biggest carb I’ve seen with peoples setups is a 28mm. I always thought bigger carbs gave more torque? Makes me think twice about what to use on my 385 build which is being built for maximum torque, not HP? I was thinking TMX 30mm, but seems PWK 28 give high torque figures. Even std 31k!? Which was a surprise. Jon Pipe design is very important. I would get in touch with Kenny and give him your port durations, width of exhaust port, squish height and geometric compression ratio. He is a wizzard at designing pipes to a specific criteria. |
|
|
|
Post by marrcel on Oct 12, 2020 9:27:45 GMT 1
One thing is not mentioned so far. This is the gear reduction ratio.
I run standard 17/39 sprockets.
But i have 150/60?/17 tire. Thats a bit shorter ratio than the standard 18”. May be this explains my torque value partly.
|
|
