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TurboKat
01-09-2005, 02:49 AM
Hey OZ, I read your thread on Oldskool re; A/R ratios, it was perfect timing for me coz I was researching exactly the same thing at the time (spooky huh?) [:0]
It looks like we had the same ideas about what size snail to use, I was thinking along the lines of something from a 1.4 - 1.6 litre car engine to allow for the extra RPM & efficiency of a bike motor.
It seems the Rajay unit that Mr Turbo has been using 'til recently has an A/R of .40 on both inlet & exhaust, there are a few similar sized integrated wastegate jobs around but they seem to be off 1.8 - 2 litre engines. [?]
I think i've narrowed it down to a M24 model T25 or T28, they're both avail. in .42 inlet & .48 exhaust which is about perfect size wise but here's the rub - from my old turbo car days, T03 was big & T04 was bigger so I assumed (all Garrett) GT 17 was tiny, T2 bigger, T25 bigger again, T28, T3, T4, etc, you get the picture, but I was looking at one of the bike Turbo builders sites (I don't rember which - I've looked at heaps) & their stage 1 kit has a T28 & stage 2 is a T25! WTF? Have I got it arse about? I assumed stage 2 has more of everything (HP & torque) than stage 1 but now I'm a bit confused (happens a lot, I'm not very itelij...intleg...intelag....smart)
What pearls of wisdom have you turned up from your research?
Now, I am a qualified Mechanic but WTF is a flow map? All the riceburner mags are talking about flow mapping turbos for optimum efficiency [V] are they just milking themselves? I'm not trying to make 500 HP from this thing so I'm sure that shit wouldn't apply to me but you know how it is - it's good to know everything before you spend the $.
Other thing is all the Jap car turbos are blow thru, word on the street is that you can't run fuel thru a blow thru unit coz it'll fuck the seals up, sounds feasible, what do you reckon?
Do you know if there are seals avail to convert 'em?
What unit did you settle on?
What's the John Dory with Supercharging? You mean one off a jap car?
I didn't think they'd be able to handle 10k + revs. If they could, it'd be a piece of piss to set one up ay? Tell me more[:p]
Fuck me, I've never typed this much in all my life - I'm actually starting to get average at it! ;)
It's 2.45 am, i'm hittin the sack [|)]

J7-11
01-09-2005, 03:32 AM
Damn I want a blower...

You just got me thinking that a blower of a Toyota 4A-GZE (don't ask why I know the engine designation) from a jap Levin/MR2 (I think) would do the job just fine I reckon. It's a 1.6 that I'm guessing revs to around 7500 so supplying enough air for our 1100's (or more if you're lucky) at 11000 should be ok. If not there's also a 2L supercharged donk too, which would easily be enough. As for the revs, just use different sized pulleys, so the blower spins at a similar speed to what it would on the car.

I could be full of it tho...

J7-11
01-09-2005, 03:32 AM
Damn I want a blower...

You just got me thinking that a blower of a Toyota 4A-GZE (don't ask why I know the engine designation) from a jap Levin/MR2 (I think) would do the job just fine I reckon. It's a 1.6 that I'm guessing revs to around 7500 so supplying enough air for our 1100's (or more if you're lucky) at 11000 should be ok. If not there's also a 2L supercharged donk too, which would easily be enough. As for the revs, just use different sized pulleys, so the blower spins at a similar speed to what it would on the car.

I could be full of it tho...

Tony Nitrous
02-09-2005, 06:43 PM
OK, Silly Question time.....

What if you mounted a Turbo (small Jap car or similar) with the exhaust side removed / changed to run belt and pully from the ignition end of the crank. Turning it into a Supercharger.
Similar to the TTS system...
http://www.tts-performance.com/catalog/product_info.php?cPath=502&products_id=4220&PHPSESSID=9f1f66e6d35f6ae9d25cc7874c20df72
Note..ROTREX superchargers are not positive displacement but work on the principle of a turbine,
Im sure you could source Belts / Pullys / Turbo / Mountings / Oil feed and returns / manifold etc.
What would the + and - of it be ?
Wide range of boost from lower revs ?
Cooler charge ?
More drag on the motor than a Turbo ?
TTS claim an efficiency of 72% for their Supercharger compaired to a 65% for a Turbo.
Would there be any problem with dump valves / waist gate's ?
I notice TTS go for injected Motors (probabley 'cos they are "smart" enough to compensate for fueling on a lowish boost system ?
Would it have to be Injected or Carbs ?
Blow-through or Draw-through ?

No plans at present,
Its just a "what if" that keeps popping up in my mind.

Feel free to shoot the idea full of holes,
If it was that easy there would be thousands of them !

Tony.

Tony Nitrous
02-09-2005, 06:43 PM
OK, Silly Question time.....

What if you mounted a Turbo (small Jap car or similar) with the exhaust side removed / changed to run belt and pully from the ignition end of the crank. Turning it into a Supercharger.
Similar to the TTS system...
http://www.tts-performance.com/catalog/product_info.php?cPath=502&products_id=4220&PHPSESSID=9f1f66e6d35f6ae9d25cc7874c20df72
Note..ROTREX superchargers are not positive displacement but work on the principle of a turbine,
Im sure you could source Belts / Pullys / Turbo / Mountings / Oil feed and returns / manifold etc.
What would the + and - of it be ?
Wide range of boost from lower revs ?
Cooler charge ?
More drag on the motor than a Turbo ?
TTS claim an efficiency of 72% for their Supercharger compaired to a 65% for a Turbo.
Would there be any problem with dump valves / waist gate's ?
I notice TTS go for injected Motors (probabley 'cos they are "smart" enough to compensate for fueling on a lowish boost system ?
Would it have to be Injected or Carbs ?
Blow-through or Draw-through ?

No plans at present,
Its just a "what if" that keeps popping up in my mind.

Feel free to shoot the idea full of holes,
If it was that easy there would be thousands of them !

Tony.

Tony Nitrous
02-09-2005, 06:46 PM
http://img352.imageshack.us/img352/9092/gsx1400chargermont1dd.jpg (http://imageshack.us)

Tony

Tony Nitrous
02-09-2005, 06:46 PM
http://img352.imageshack.us/img352/9092/gsx1400chargermont1dd.jpg (http://imageshack.us)

Tony

Tony Nitrous
02-09-2005, 06:58 PM
Supercharged Busa.
Nowhere near the 621-rwhp UK or 701-rwhp USA Busa's but i was thinking Useable not a Dyno-pony.

http://img380.imageshack.us/img380/2923/busagraph5sh.jpg (http://imageshack.us)

Tony Nitrous
02-09-2005, 06:58 PM
Supercharged Busa.
Nowhere near the 621-rwhp UK or 701-rwhp USA Busa's but i was thinking Useable not a Dyno-pony.

http://img380.imageshack.us/img380/2923/busagraph5sh.jpg (http://imageshack.us)

TurboKat
02-09-2005, 08:33 PM
There are plenty of these type of systems around for car engines (mainly V8s) but the impeller needs to spin at or close to 6 figure RPMs to pass enough air to make pressure. The turbine is overdriven by a set of gears to get those sort of revs. My brother has bought one for his 5 litre Statesman, I'll be putting it on soon & I'm interested to see what sort of improvement it makes. I'll let you know. I haven't actually seen one for a bike application up close.
Draw thru or blow thru would work on that style of system, easiest to setup would be blow thru on a EFI bike with a Power Commander - just mount it, drive it & dynotune it - piece of piss, that'll be $8000 thanks, cash or card?

TurboKat
02-09-2005, 08:33 PM
There are plenty of these type of systems around for car engines (mainly V8s) but the impeller needs to spin at or close to 6 figure RPMs to pass enough air to make pressure. The turbine is overdriven by a set of gears to get those sort of revs. My brother has bought one for his 5 litre Statesman, I'll be putting it on soon & I'm interested to see what sort of improvement it makes. I'll let you know. I haven't actually seen one for a bike application up close.
Draw thru or blow thru would work on that style of system, easiest to setup would be blow thru on a EFI bike with a Power Commander - just mount it, drive it & dynotune it - piece of piss, that'll be $8000 thanks, cash or card?