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Jul 16, 2020 10:15:02 GMT
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I actually prefer the zip zip blipping as it returns to get back on the drive rather than the full bore drive by but yes lovely sounding all round. I'm not a million miles away from Darkspeed ... Watching with interest.  |
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jamesd1972
Club Retro Rides Member
Posts: 2,920 
Club RR Member Number: 40
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Jul 16, 2020 12:13:22 GMT
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Power for show, torque for go ?
I was led to understand in really basic terms
power= top speed,
torque = Acceleration
So over twice the power but also over twice the torque
37 - 100 bhp
49 - 115 ftlbs
And a flat 6 so winning at life !
James
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Jul 16, 2020 14:40:52 GMT
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Brilliantly bonkers....cant wait.
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'80 s1 924 turbo..hibernating
'80 golf gli cabriolet...doing impression of a skip
'97 pug 106 commuter...continuing cheapness making me smile!
firm believer in the k.i.s.s and f.i.s.h principles.
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Jul 16, 2020 14:53:04 GMT
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Undeniably cool, but can't help thinking its a lot of effort for 100bhp and expensive engine spares. Still, as I say, undeniably cool which is the main thing 😎 Yeah I'm really not doing it for the power. I could get just as much power from my Datsun engine (but it would be peaky and lumpy) Main reason I'm silly enough to take this on is because of the interest/challenge for me in doing so and the sound its gonna make when finished! I love the sound of flat sixes. Oh also- what it does lack in bhp it makes up for in torque - 115 lbft is pretty meaty in an Imp and it will hopefully be smooth but punchy, so making the car feel faster than it is. Probably better for real world driving then having to ring its tits off all the time. Plus a better spread of gears too. The imps gearbox with its 4000 rpm at 100kph gets boring quite quickly. I completely agree. It's a great idea and I'd do it myself, even if it may be an odd choice on paper. |
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Jul 16, 2020 15:34:51 GMT
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Yeah cracking idea, even if it's not the most obvious method I'm thinking there's probably room for improvement on the goldwing motors as well. Not that there's likely to be much aftermarket, but they seem pretty unstressed for their capacity so wringing a little more out with good old fashioned tuning should be doable |
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Jul 16, 2020 15:40:23 GMT
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i liked that honda reply so hard that there are now chunks of radioactive graphite around the button, giving off 20,000 roentgens per hour.
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Jul 16, 2020 17:14:32 GMT
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No need to tune the engine they are turbine smooth and the torque starts good and early, they also don't break as they very under stressed and do massive mileages. As a Boxster owner I salute your decision to go flat 6  . |
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Last Edit: Jul 16, 2020 17:15:30 GMT by duggers
Needs a bigger hammer mate.......
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Darkspeed
Club Retro Rides Member
Posts: 4,873
Club RR Member Number: 39
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Jul 16, 2020 18:19:25 GMT
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Have one with an even closer 911 vibe - Interesting from an Imp alternative powerplant perspective there's a K in the background as well
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melle
South West
It'll come out in the wash.
Posts: 2,010
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Jul 16, 2020 18:42:30 GMT
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I was led to understand in really basic terms power= top speed, torque = Acceleration No, power = torque x rpm |
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www.saabv4.com'70 Saab 96 V4 "The Devil's Own V4" '77 Saab 95 V4 van conversion project '88 Saab 900i 8V
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Jul 16, 2020 18:58:51 GMT
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Only one relevent equasion here...angle of depressed throttle will proportionately increase upturn of corners of mouth....(and possibly tightening of sphincter too!)
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Last Edit: Jul 16, 2020 18:59:08 GMT by strikey
'80 s1 924 turbo..hibernating
'80 golf gli cabriolet...doing impression of a skip
'97 pug 106 commuter...continuing cheapness making me smile!
firm believer in the k.i.s.s and f.i.s.h principles.
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Jul 16, 2020 19:21:58 GMT
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Heard this on a documentary about drag racing in the US years ago from a tuner I cannot remember the name of.....
"Horse power gives bragging rights, torque gives acceleration"
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Last Edit: Jul 16, 2020 19:22:19 GMT by duggers
Needs a bigger hammer mate.......
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goldnrust
West Midlands
Minimalist
Posts: 1,887
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Jul 16, 2020 19:39:27 GMT
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This sounds like an awesome adventure Alex! I’m looking forward to seeing it unfold Its a shame you don’t get to keep the nice sequential bike gearbox, but the reasons sound sensible. |
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Last Edit: Jul 16, 2020 19:57:22 GMT by goldnrust
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Jul 16, 2020 19:50:17 GMT
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I was led to understand in really basic terms power= top speed, torque = Acceleration No, power = torque x rpm For the way most people normally drive there is a pretty good correlation between torque and perceived acceleration and power and top speed, the reality though is if you are preparred to always keep the engine around the max power rpm this is where you will get the fastest acceleration and top speed. Can't wait to see this built. |
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Last Edit: Jul 16, 2020 19:51:07 GMT by kevins
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Jul 16, 2020 20:43:17 GMT
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That's a lot of motor for a tiny car! I like it! This imp keeps getting better How heavy is the old motor in comparison though? The current Datsun engine is around 87kg, plus crossmember and exhaust etc. I think a standard Imp engine is around 70kg? I am hoping to get the goldwing down to around 80kg. I'll be posting about that next. |
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Jul 16, 2020 20:48:46 GMT
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Have one with an even closer 911 vibe - Interesting from an Imp alternative powerplant perspective there's a K in the background as well Yep- as you can well imagine I have spent many an evening going through all of the various goldwing vids on the tube. I do love that one. All those extra touches. I cant tell if it has completely open exhausts or if they are really thin walled straight through silencers? |
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Jul 16, 2020 20:55:32 GMT
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Yeah cracking idea, even if it's not the most obvious method I'm thinking there's probably room for improvement on the goldwing motors as well. Not that there's likely to be much aftermarket, but they seem pretty unstressed for their capacity so wringing a little more out with good old fashioned tuning should be doable I have looked all over the internet and there aint many goldwings modified in the engine department. I cant find any aftermarket cams so the originals would have to be re-ground. I'm not sure how far the stock hydraulic lash adjusters can be shimmed out to suit? The inlet ports are tiny!!!! about 25mm. Its all tuned for torque and inlet airspeed at low revs to keep it smooth. I think the stock rev limit is 6000 and I bet most never see that. I have found a couple that have been supercharged! I'll be totally happy if it just all works as stock and my box choice doesnt grenade itself being run backwards. 6000 rpm will sound nice enough :-) If it all works out well then I could always buy some spare heads and play around with them. You'll see way more detail soon as I load up more pics. Its a nicely built engine that's for sure! |
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v8
Part of things
Posts: 312
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Jul 16, 2020 20:59:05 GMT
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A pair of Daihatsu Charade turbochargers would be perfect. Imp 911 twin turbo  |
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Jul 16, 2020 21:14:10 GMT
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If your box does grenade itself then you might be able to use a Subaru gearbox. I know there's a kit you can buy from the states with reverse-cut CROWNwheels and pinions so VW beetles can run EJs sticking out of the back. Haven't worked through in my head whether that would get everything pointing in the right direction but might be an option |
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melle
South West
It'll come out in the wash.
Posts: 2,010
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Jul 16, 2020 21:20:21 GMT
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the reality though is if you are preparred to always keep the engine around the max power rpm this is where you will get the fastest acceleration and top speed. Er, not sure I understand what you're saying here. |
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www.saabv4.com'70 Saab 96 V4 "The Devil's Own V4" '77 Saab 95 V4 van conversion project '88 Saab 900i 8V
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Jul 16, 2020 21:24:55 GMT
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If your box does grenade itself then you might be able to use a Subaru gearbox. I know there's a kit you can buy from the states with reverse-cut CROWNwheels and pinions so VW beetles can run EJs sticking out of the back. Haven't worked through in my head whether that would get everything pointing in the right direction but might be an option |
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