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Jan 11, 2008 19:46:53 GMT
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Hi all, I've been thinking that the best way to get some decent-ish torque out of the fairly small, short stroke imp engine would be a turbo or supercharger. I guess I understand the main differences between turbo's and superchargers- superchargers are belt driven and so don't suffer from lag as much, but do sap a small amount of engine power. But how tricky is it to plumb either of these in? I'm guessing that the best way would be a "suck through" application using something like a single SU carb. Also, because the imp engine is so small (albeit mine is overbored to 915cc) I'm guessing that I'm going to need pretty much as small a turbo as possible? Having looking on the Garrett (the only turbo make I know tbh) website I saw things like "T12, T15, T20" which I'm guessing would be most suitable. But what cars have small turbos like this as standard? I know renault 5 turbos + carbs have been used before, but these are fitted to a 1.4 engine as standard, so presumably still larger than ideal. I was thinking metro turbo, but I hear these turbos are also quite big? This site shows some of the smaller garrett turbos www.capa.com.au/turbo_garrett.htmWhat about superchargers? These are presumably easier to plumb in because they don't need to be plumbed into the exhaust? What small superchargers are there? My engine in NA for should be pushing out around 50-60bhp I guess if that's of any use. As you can probably tell, I don't really know what I'm talking about here, so please bear with me! And if any one fancies helping out you'll be more than welcome  |
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loon
Posted a lot
Posts: 1,092
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Jan 11, 2008 19:55:54 GMT
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hi frank did you look at jo's viva ? the charger in that is off a mini cooper i think it would work ok on yours. cant help other than that  |
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what the fcuk have you done lately
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Jan 11, 2008 20:00:16 GMT
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Just get an old Ford 1bbl (the Holley knock off with the cruch proof floats). For a turbo get one from a Subaru Loyal or Turbo Sprint or somthing like that.. they were pretty small and should work tops. Even a Toyota CT-9 would work good and they are cheap as hell since they are the first upgrade for the 4EFTE (check . don't bother with draw thru... its curse word. Just blow thru the Ford 1bbl. |
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1986 Toyota Camry HB 1992 Toyota Tercel turbo 1972 Datsun 510 1992 Honda Accord EX-R wgn. Same as always, use THE FORMULA....... Your Car + {(Suspension - Height) + (Wheels + [3xWidth])} = THE WIN |
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Jan 11, 2008 20:03:47 GMT
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J's Imp runs a Mini blower.
His old Imp ran a Maestro Turbo setup (I think...).
I'd go for bike carbs and a mini blower.
*n
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Top grammar tips!
Bought = purchased. Brought = relocated
Lose = misplace/opposite of win. Loose = your mum
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slater
Club Retro Rides Member
Posts: 6,390
Club RR Member Number: 78
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Small turbos/super chargersslater
@slater
Club Retro Rides Member 78
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Jan 11, 2008 20:08:44 GMT
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Well only you can choose which way to go, theres so much you can say about the pros-cos of each i couldnt possibly cover it here.
Supecharger wise, the BWW mini one would work, maybe a bit big for the engine but you don't find many smaller ones. You can gear it to suit anyway. Suck through is ok, but blow hrough with an intercooler and more compression ratio is better.
As far as turbos go something about T2 (fiesta rst) size would be about right i think. Would'nt worry about getting anything much smaller as contary to popular internet 'false wisdome' smaller turbos can be worse than bigger ones. Suck through with a turbo is silly, you should go blow through whatever you do.
Oh and turbos are much eaiser to fit imo. maybe a bit more complicated than a suck through supercharger but not beacuse of the exhuast just all the odds and ends you have to do to make a carb work under boost. Hooking a turbo up to your exhaust is alot easier than mounting and divising a drive system for a blower imo.
Check out turbominis.co.uk they build 998cc turbos
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Jan 11, 2008 20:14:48 GMT
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what about an IHI, something off a starlet or charade turbo.
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Jan 11, 2008 20:17:38 GMT
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Yeah, the Starlet turbo is the CT-9... just go check TO theres always some for sale on there...... and cheap
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1986 Toyota Camry HB 1992 Toyota Tercel turbo 1972 Datsun 510 1992 Honda Accord EX-R wgn. Same as always, use THE FORMULA....... Your Car + {(Suspension - Height) + (Wheels + [3xWidth])} = THE WIN |
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Jan 11, 2008 20:17:59 GMT
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please don't do suck through.....blow through is just passable for any sort of home brewed install.
injection would be 100x better and probably cheaper.
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Jan 11, 2008 20:27:08 GMT
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I like the GT2056... MEGA efficient, good wide compressor map at around 1bar boost. so shouldnt surge easily, or end up running beyond the choke point either
Still may be larger than you really want. The imp lump is sub 1 litre isnt it?
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Jan 11, 2008 20:29:07 GMT
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Yep, charade gtti, metro turbo etc something, got a cuple of mates on turbominis, pretty good lads and know their stuff.
Seem to think you might have issues with bike carbs and turbos from something that I've read before, they just don't seem to enjoy boost too much, BUT I may be wrong.
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'A' series trigger wheels and sensor brackets, 205 GTi radiator brackets, general fabrication and machining - www.gsmotorsport.net |
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Jan 11, 2008 20:30:18 GMT
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Oh and i agree with seventynine, EFI would make for a much better solution!
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Jan 11, 2008 20:34:11 GMT
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Yep, charade gtti, metro turbo etc something, got a cuple of mates on turbominis, pretty good lads and know their stuff. Seem to think you might have issues with bike carbs and turbos from something that I've read before, they just don't seem to enjoy boost too much, BUT I may be wrong. They love it - constant velocity carbs and they can take up to 1bar. ;D *n |
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Top grammar tips!
Bought = purchased. Brought = relocated
Lose = misplace/opposite of win. Loose = your mum
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Jan 11, 2008 20:34:52 GMT
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a quick search on Charade Turbo's resulted in the following info
The Charade Turbo's force-inducted 3-pot engine was a joint venture between Daihatsu Japan and IHI-Hitachi. Using the standard CB60 993cc engine as its base, the project called for a lowered static compression ratio (from 9.5:1 to 8.0:1), an electric fuel pump and associated regulator, a water-to-oil cooler, a larger diameter exhaust and a revised air filter system. The chosen V04-trim IHI RHB32 turbocharger was one of the smallest in the world; this was used to pressurise a downdraft Aisan carburettor to around 7 psi. Due to the mild boost level, no form of intercooling was required.
So if you can find one cheap enough it might be a good source of parts !
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Last Edit: Jan 11, 2008 20:35:58 GMT by andyb64
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Jan 11, 2008 20:49:27 GMT
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Cheers guys, like I said- my knowledge is limited and the suck through idea was more of a "once upon a time many a moon ago i was heard this feller in a pub mention that he might have had a friend who heard a rumour that it was the best way" type thought tbh. I have got some Kehein (sp?) constant velocity carbs I was thinking of using of having a manifold made up for. If I did it blow through with bike carbs, once I have the manifold made up, I could then get some throttle bodies and upgrade to EFi at a later date couldn't I? (assuming I get some TBs with the same spacing as the carb) The charade turbo sounds like a good idea. I'm assuming that looking for similar engine sizes/power outputs is the best way to find something suitable? I'll check out the turbo mini's site for sure  Can any one recommend something to read about forced induction? |
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slater
Club Retro Rides Member
Posts: 6,390
Club RR Member Number: 78
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Small turbos/super chargersslater
@slater
Club Retro Rides Member 78
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Jan 11, 2008 21:00:44 GMT
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Maximum boost by Corky Bell is pretty good
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Jan 11, 2008 21:06:18 GMT
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Jan 11, 2008 21:21:21 GMT
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Maximum boost by Corky Bell is pretty good ill second that, excellent read. then theres supercharged! by the same author, which shares a lot of content with the other one but is for superchargers. |
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Jan 11, 2008 21:29:37 GMT
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I would keep it as simple as possible using as many components from a single donor as you can. That way you know all the components will work together. I'm planning on doing something like this on a 1.3 golf hopefully using Renault 5 bits. Still got some research to do though.
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Last Edit: Jan 11, 2008 21:33:08 GMT by andyb64
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Jan 11, 2008 21:31:39 GMT
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I would keep it as simple as possible using as many components from a single donor as you can. That way you know all the components will work together. Yeah good point. Donor charade components would be good then, would just need the manifolds etc |
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stealthstylz
Club Retro Rides Member
Posts: 14,856
Club RR Member Number: 174
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Small turbos/super chargersstealthstylz
@stealthstylz
Club Retro Rides Member 174
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Jan 11, 2008 21:34:45 GMT
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I'm gonna turbo the uno at some point. Probably blow through a pair of SU's for ease.
Matt
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