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 197 Posts Member #: 1488 Advanced Member Bristol |
17th May, 2007 at 12:50:28pm
Basically the turbo unit creates a restriction in the exhaust. This prevents the free flow of gas out of the cylinder, thus robbing the car of some power as the engine now has to expend more energy pumping it out. However, while I have no figures I would imagine the overall power loss from running a turbo is less than running a super, despite the fact the turbo is actually less energy efficient. There is no sense crying over every mistake- you just keep on trying til you run out of cake. |
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Site Admin  15300 Posts Member #: 337 Fearless Tom Fenton, Avon Park 2007 & 2008 class D winner & TM legend. |
17th May, 2007 at 01:11:02pm
Why drink wine when you can drink beer?
On 29th Nov, 2016 madmk1 said:
On 28th Nov, 2016 Rob Gavin said:
I refuse to pay for anything else Like fuel 😂😂 |
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 8297 Posts Member #: 408 Turbo Love Palace Fool Aylesbury |
17th May, 2007 at 01:53:56pm
Ive got the formulae to work it out if you like, but not sure how to type it up. lol
https://www.facebook.com/pages/Fusion-Fabri..._homepage_panel
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 1566 Posts Member #: 36 Post Whore Basingstoke |
17th May, 2007 at 01:56:31pm
about sheepshagging?? |
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8297 Posts Member #: 408 Turbo Love Palace Fool Aylesbury |
17th May, 2007 at 01:59:17pm
On 17th of May, 2007 at 01:56pm Ric said:
about sheepshagging??  LOl....Well now you mention it..... This is the book, got some handy stuff in. http://cgi.ebay.com.au/Kempes-Engineers-Ye...3QQcmdZViewItem https://www.facebook.com/pages/Fusion-Fabri..._homepage_panel
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3594 Posts Member #: 655 Post Whore Northern Ireland |
17th May, 2007 at 06:14:28pm
On 16th of May, 2007 at 07:30pm Bat said:
Hi, Stevie .. I wouldn't be surprised if the huge off on transition attributes to the breakages... Cheers, Gavin :) There is no doubt about that !!!!!!!! On 17th of May, 2007 at 12:39pm RogerM said: On 16th of May, 2007 at 07:27pm josh_tacon said:
There are plenty of boost controlers and ecus that can bring the boost in progressively over a load / speed range to help ease things a long and make it nicer / easier to drive. Anybody fitted a working traction contol system to a Mini? I started fitting toothed wheels to the inner CV's and sensor brackets many years ago .... before I took the car of the road to "freshen her up" (translated means sit under a cover untouched, except to rob bits off, for years!!). A friend of mine who is an electronics wizz had made me a basic soft spark cut traction control unit that would probably have worked well in a straight line. MS2 has traction control capability .... can be liked to the boost control as well as fuel / ignition IIRC. Worth a though if your worried about putting it on the road! Good point...but is anybody actually doing that yet with boost controllers ? With the right controller, boost could be limited based on road speed, which might be better than pedal or rpm's TCS....could be a worthwhile addition. I know you guys dont like DTA for fuel control, but one of their ecu's could be used for ignition and traction control. I think its main mode of operation is to cut spark. Ive used the P8 and now the S80 on my car, and the TCS works reasonably well. Although it could do with much better fine tuning. Some form of torque management using boost control might be easier or cheaper though ? 9.85 @ 145mph
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58 Posts Member #: 1724 PRIZE WANKER. |
18th May, 2007 at 08:25:36am
On 17th of May, 2007 at 08:57am Axel said:
The turbine needs energy to drive the compressor. That energy is in the form of pressure, temperature and velocity. The only way it can get that energy from the exhaust gas is to rob it from the combustion process. Hence at the end of the combustion stroke the conditions in a turbo engine cylinder are different from a NA engine. This has an effect of the output of the engine. You dont get owt for nowt as TD says. Yup, and after-all an engine is merely and air-pump and no-one has yet managed to overturn the Laws of Thermodynamics and/or Conservation of Energy 
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58 Posts Member #: 1724 PRIZE WANKER. |
18th May, 2007 at 08:26:30am
On 17th of May, 2007 at 12:50pm Badger said:
Basically the turbo unit creates a restriction in the exhaust. This prevents the free flow of gas out of the cylinder, thus robbing the car of some power as the engine now has to expend more energy pumping it out. However, while I have no figures I would imagine the overall power loss from running a turbo is less than running a super, despite the fact the turbo is actually less energy efficient. Can't disagree with that! |
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58 Posts Member #: 1724 PRIZE WANKER. |
18th May, 2007 at 08:26:43am
On 17th of May, 2007 at 12:50pm Badger said:
Basically the turbo unit creates a restriction in the exhaust. This prevents the free flow of gas out of the cylinder, thus robbing the car of some power as the engine now has to expend more energy pumping it out. However, while I have no figures I would imagine the overall power loss from running a turbo is less than running a super, despite the fact the turbo is actually less energy efficient. Meant to add that the exhaust manifold design, insulation, and the turbo exhaust housing, turbine & rotor design all help minimise back-pressure though If you compare, for example, 0.5 bar boost from a supercharger, with 0.5 boost obtained by using a turbo-charger, you can place your bet against me about the net flywheel bhp Edited by ppj_racing on 18th May, 2007. |
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 7765 Posts Member #: 74 I pick holes in everything.. Chief ancient post excavator |
18th May, 2007 at 09:09:56am
On 16th of May, 2007 at 06:14pm stevieturbo said:
Im surprised nobody has considered using a centrifugal supercharger on a Mini yet.... A small Rotrex unit would probably work extremely well. What about the Shorrock? Came in 1965? On 13th Jul, 2012 Ben H said:
Mine gets in the way a bit, but only when it is up. If it is down it does not cause a problem. |
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44 Posts Member #: 1645 Member Adelaide Australia. |
18th May, 2007 at 01:30:52pm
Mini World cover car from a few years back?? It had a big truck turbo converted to centrifugal supercharger, run off a belt to a pulley which itself runs another belt off the flywheel, now that would go like anything. |
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3594 Posts Member #: 655 Post Whore Northern Ireland |
18th May, 2007 at 03:47:41pm
On 18th of May, 2007 at 08:26am ppj_racing said:
On 17th of May, 2007 at 12:50pm Badger said:
Basically the turbo unit creates a restriction in the exhaust. This prevents the free flow of gas out of the cylinder, thus robbing the car of some power as the engine now has to expend more energy pumping it out. However, while I have no figures I would imagine the overall power loss from running a turbo is less than running a super, despite the fact the turbo is actually less energy efficient. Meant to add that the exhaust manifold design, insulation, and the turbo exhaust housing, turbine & rotor design all help minimise back-pressure though If you compare, for example, 0.5 bar boost from a supercharger, with 0.5 boost obtained by using a turbo-charger, you can place your bet against me about the net flywheel bhp Except you cant compare boost for boost with 2 different sources. Even 2 different turbos at 0.5 bar can yield massively different results. Bang a decent sized twin screw blower onto a Mini at 0.5bar, versus a weedy T2 ( or smaller ), and I bet the twin screw eats it. 9.85 @ 145mph
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58 Posts Member #: 1724 PRIZE WANKER. |
19th May, 2007 at 05:05:56pm
On 18th of May, 2007 at 03:47pm stevieturbo said:
Except you cant compare boost for boost with 2 different sources. Why not? On 18th of May, 2007 at 03:47pm stevieturbo said:
Even 2 different turbos at 0.5 bar can yield massively different results. Bang a decent sized twin screw blower onto a Mini at 0.5bar, 0.5 bar ...!!! hardly seems worth the effort! Came on here hoping to have help increasing knowledge of turboing Minis We already successfully race a 700 bhp rallycross car .. obviously not a Mini, but for son/fun etc plan to use a 1480 block that we already have plus T3 turbo plus Kugelfischer pump plus chargecooler from Lotus Carlton and we've had a lot of negative stuff 
e.g. some said (can't find the quote now) that it's no good boosting big bore blocks because of blow-by! Get real! That was a prob 15b years ago but now with the technology and dosh, you can have liners with perfect geometry, nice pistons with steel gas-nitrided rings with Napier style profiles and ductile steel too ... the higher the boost the more the ring is forced against the liner. Torque plate honing to avoid distortion when torquing down head bolts is crucial We can blow big-bore engines OK Just wanted some +ve stuff re: Minis Going ahead with the project ... ignoring the detractors. Thought someone might highlight potential clutch and gearbox probs AND SOLUTIONS. We have seen the drag-Minis claiming 280 - 300 bhp and so IT IS DOable We have drums of very hi RON fuel We regularly boost a big engine to 2.2 bar .. max 2.5 BMW boosted their 4-pot 1500cc engine to 4 bar .. we realise the Mini block isn't the same, but then again we're not looking for as much power. A 1500 n-a engine should give 140+ bhp with today's technology so 200+ bhp by using a nice bit of boost shouldn't be a prob! Vee haff ways of making it verk! Edited by ppj_racing on 19th May, 2007. |
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58 Posts Member #: 1724 PRIZE WANKER. |
19th May, 2007 at 05:06:08pm
Like to hear from someone actually running a big capacity
Edited by ppj_racing on 19th May, 2007. |
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58 Posts Member #: 1724 PRIZE WANKER. |
19th May, 2007 at 05:06:17pm
Like to hear from drag-Mini owners, running 300 bhp ..pleeze Edited by ppj_racing on 19th May, 2007. |
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 2909 Posts Member #: 83 Post Whore Glasgow, Scotland |
19th May, 2007 at 06:22:41pm
On 19th of May, 2007 at 05:05pm ppj_racing said:
e.g. some said (can't find the quote now) that it's no good boosting big bore blocks because of blow-by! Get real! That was a prob 15b years ago but now with the technology and dosh, you can have liners with perfect geometry, nice pistons with steel gas-nitrided rings with Napier style profiles and ductile steel too ... the higher the boost the more the ring is forced against the liner. Torque plate honing to avoid distortion when torquing down head bolts is crucial We can blow big-bore engines OK Just wanted some +ve stuff re: Minis Going ahead with the project ... ignoring the detractors. you will find on here that the myth of being unable to force feed a big block motor has been expelled. well built a 1380+ motor will take boost fine. should come up in a search
On 19th of May, 2007 at 05:05pm ppj_racing said:
Thought someone might highlight potential clutch and gearbox probs AND SOLUTIONS. again this has been discussed in detail, a search would reveal the results, but to sum it up: - a double grey will handle the torque q 200+bhp motor produces, but will eat thrusts for breakfast if it is a road car. TurboDave is developing a clutch which ought to hold very high torque but without sacraficing thrusts, and finally robert made his own twin pressure plate verto clutch, which is proveing to hold high torque outputs again without sacraficing thrusts, again the thread will turn up in a search :) On 19th of May, 2007 at 05:05pm ppj_racing said:
We have seen the drag-Minis claiming 280 - 300 bhp and so IT IS DOable never heard of a 300bhp a-series but if there is one the owner is probably keeping tight lipped as to how it was achieved. with regards gearbox weakness search for threads by miniwilliams. On 19th of May, 2007 at 05:05pm ppj_racing said:
We have drums of very hi RON fuel We regularly boost a big engine to 2.2 bar .. max 2.5 BMW boosted their 4-pot 1500cc engine to 4 bar .. we realise the Mini block isn't the same, but then again we're not looking for as much power. A 1500 n-a engine should give 140+ bhp with today's technology so 200+ bhp by using a nice bit of boost shouldn't be a prob! Vee haff ways of making it verk! i dont think many people have done experiments with very high octane fuel so resutls are scarse, but search for threads by users hedgemonkey and mini1071s (off the top of my head) there is some info floating around. turbo 16v k-series 11.9@118.9 :)
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Forum Mod 10980 Posts Member #: 17 ***16*** SouthPark, Colorado |
19th May, 2007 at 06:31:45pm
Big capacity - why not try the search function? 1380 is probably a good number to input.
On 17th Nov, 2014 Tom Fenton said:
Sorry to say My Herpes are no better Ready to feel Ancient ??? This is 26 years old as of 2022 https://youtu.be/YQQokcoOzeY |
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 223 Posts Member #: 598 Senior Member Gaol |
20th May, 2007 at 12:43:49am
It late, im tired, and my eyes dont seem to be working properly, but heres my 2p all the same.
On 5th of Sep, 2006 at 05:47pm mini13 said:
I reckon if his brains were gunpowder he couldn't blow his own hat off... |
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58 Posts Member #: 1724 PRIZE WANKER. |
20th May, 2007 at 05:23:32pm
On 19th of May, 2007 at 06:22pm evolotion said:
you will find on here that the myth of being unable to force feed a big block motor has been expelled. well built a 1380+ motor will take boost fine. should come up in a search *wink* That's good news ... I have looked though ... without finding many hard-core helpful facts .. so 1480 which is what we already have, should be OK. As for power achievable, almost 40 years ago using crabby Heath-Robinson technology, Alec Poole got 180 bhp from his 1300cc Mini with a carp turbo and NO intercooler .. and had to put fins on the inlet plenum to keep it below 110 deg C (quote) so surely 200+ bhp must be easily achievable today with our half-decent Garret, Kugelfischer pump Lotus Carlton charge-cooler and other gizmos? |
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58 Posts Member #: 1724 PRIZE WANKER. |
20th May, 2007 at 05:27:04pm
On 20th of May, 2007 at 12:43am blown_imp said:
I Ive run high octane fuel, not up there with methanol, but very det resistant all the same. a mixture of toluene and xylene with a dash of shells finsest to get the burn speed up. J We settle for agreeing with this. What boost do you run?? |
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58 Posts Member #: 1724 PRIZE WANKER. |
20th May, 2007 at 05:29:35pm
On 19th of May, 2007 at 06:31pm TurboDave said:
Big capacity - why not try the search function? 1380 is probably a good number to input. 300hp? I've not heard anyone ever, ever claim on this site to have 300hp. Apart from one 'claim' that was nothing more than a BS as it was from the finger typing of a talented person who clearly thinks the world is stupid. Go to YouTube and Enter TURBO MINI |
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 2742 Posts Member #: 637 Post Whore Hertfordshire |
20th May, 2007 at 05:36:39pm
what clip are we looking for?
My build thread..
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58 Posts Member #: 1724 PRIZE WANKER. |
20th May, 2007 at 05:38:13pm
On 19th of May, 2007 at 06:22pm evolotion said:
i dont think many people have done experiments with very high octane fuel so resutls are scarse, but search for threads by users hedgemonkey and mini1071s (off the top of my head) there is some info floating around. Thanks .. we use 117 RON all the time for our main race-car. BUT .. sticking with MINIs and the 1480 block (with knackered head) that we have acquired .. here's some theory for you guys to chew-on ... 1480 cc .. at 100% VE should give around 150 bhp, other things being equal and excellent. So we have, theoretically, 150 bhp at n-a 100%VE Alec Poole got 180 bhp from 1300cc in 1969 pretty reliably despite not using an intercooler or charge-cooler and with a carp turbo so 1480 cc .... .. 150 bhp n-a i.e. off-boost .. so at 15 psi gauge boost i.e. 1 bar .... what bhp can one expect to get from this A-series Mini engine?? 200+ surely???????? |
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 8604 Posts Member #: 573 Formerly Axel Podland |
20th May, 2007 at 05:50:37pm
There are about 5 guys on here with reliable 200 banana engines, I believe, but they wont blow their own trumpets.
Edited by Paul S on 20th May, 2007. Saul Bellow - "A great deal of intelligence can be invested in ignorance when the need for illusion is deep."
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 1497 Posts Member #: 100 Parisien Turbo Expert Paris\' suburb |
20th May, 2007 at 08:17:22pm
200+ surely???????????
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