supercharging a diesel

Post by **dominic** » Tue Jul 04, 2006 5:38 pm

ive been kicking this idea around in my head for a while now so i want to get some other peoples thoughts on it.
i have a super charger at home off a 1G-GZE(the motor is going into my celica with a sprintex charger on it)

so i have been thinking of bolting the SC-14 to my 2L ,now i havent done the sums yet so im not sure if it will be big engough but i can figure that out.
i can make mounts for it etcso i think i can do it for less than the cost of turbo kit,
if it turns out to be cost viable, do you think it will work?
has any one supercharged a diesel?
will post more detailed info when i have it,but any ideas or links would be great.
cheers
Dominic

Post by **chunderlicious** » Tue Jul 04, 2006 6:51 pm

ive got a workmate who is a qualified mechanic and he has put an sc14 charger onto his GU patrol to help the turbo spool up. did it to his GQ before and it hauled (now belongs to emu creek) they work allright but he said that the belt type needs to be changed to stop slipping.

Post by **tweak'e** » Tue Jul 04, 2006 7:55 pm

i havn't done it and proberly won't now i have the new truck. however i had toyed with the idea tho it was for my 3L motor.

the 1G-GZE is a 2 litre ?? if so it should work ok on a 2.4. the only thing to watch is not to over rev the super charger. also with a supercharger giving a flatter boost curve you can get away without useing a boost compensator unless you want to use a bypass (to bypass the super at idle to cut down losses/fuel useage).

Post by **dominic** » Wed Jul 05, 2006 5:38 pm

yeah the 1G-GZE is a inline 6 two litre.
ive done a fair bit of research into supercharging petrol engines so im hoping that i will be abel to figure out a good pully ratio that will give me good boost thru teh rev range.
comsidering that the 1G revs to about 6 or 7000rpm i think i should be able to work it with teh 2L reving to 4000rpm absolute max,as it is i never really take past 3000rpm.

ill psot again when i have done some more tech research and come up with a plan and some designs.
cheers
Dominic

Post by **Ruffy** » Wed Jul 05, 2006 8:08 pm

I've got a commodore super charger on me 60. Works fine.
Can't think of his name but someone on here will know, there was a guy at the piranha pursuit with a supercharger on his 2L hilux. Looked to go good!!!!
Anybody???

Post by **dominic** » Thu Jul 06, 2006 5:37 pm

cool.
always good to know that it can be done!

if any one does know id much apreciate it.
cheers
Dominic

Post by **hjsixty** » Mon Apr 16, 2007 5:38 pm

i'm interested in supercharging my 60 but worried that a supercharger would make it heavier on the juice(?) compared to turbo (?)

Post by **tweak'e** » Mon Apr 16, 2007 5:58 pm

hjsixty wrote:i'm interested in supercharging my 60 but worried that a supercharger would make it heavier on the juice(?) compared to turbo (?)

i would say so. turbo's on deisels tend to make it more economical, something you won't get with the supercharger.

Post by **dominic** » Mon Apr 16, 2007 7:12 pm

well the concept is the same-ie forcing in more air than the motor would breathe by itself.
justteh delivery is differant.turbo being exaust driven and SC being drievn by the crank shaft.

so you would prob see a rise in fuel usage due to the fact the motor is working to turn the SC.however the advantage of using the SC when set up with a electric clutch (comes factory on SC-14)is that you can turn it on and off.
i am still musing as to wether this set up ,used with a boost compensator on the fuel pump would work well...
imagine all those extra horses and torque right down low...

having said all that i came to the conclusion that tried and proven turbo set up was easier and cheaper.
if i had more time than i knew what to do with and money to match id prob do it...

cheers
Dom

Post by **slowhilux** » Mon Apr 16, 2007 7:20 pm

A little bit off topic, i have built a few early celica's with 1GGTE's and had a good mate with a 1GGZE, drop me a PM if you need any info or help

Post by **crack** » Mon Apr 16, 2007 7:27 pm

gday mate i was toying with the same idea on my 2.8hilux with the sc14 but ive decided to go a turbo. if you do a search you may be able to find my old threads. you might find something of use in there.
good luck

jack

Post by **PGS 4WD** » Mon Apr 16, 2007 9:44 pm

Positive displacement blowers are ace on cars with aftercoolers, I've fitted a number of PWR and Harrop aftercooled PD blower to Gen 3 Commodores.
However
Belts are crap in mud-they slip and you loose boost
They produce very high outlet air temps, to get a satisfactory result you need some fancy air ducting and a front mount or a water to air aftercooler in the manifold of a reasonable design.
Normally I'd say it might hurt the economy a bit as unlike a turbo it has to be driven by the engine, it takes HP to drive the blower, I cant remember the exact spec but a 2500 HP drag car looses about 500 Hp driving the blower, I'ts on the net somewhere precisely.
Joel

Post by **Sic Lux** » Mon Apr 16, 2007 10:15 pm

yeah pgs i have the figre somewhere diffrent eng but good comparison. mate done the sc14 on red 202 went ok but belt slipage and the rest and finay got it to work half alright drove it gave it all it had but still nothing to crash hot then got a turbo made up the manafold and took it for a buzz and it flew but he used deisel turbo on petrol eng so the seals didn't last long at all, turbo cost nothing so he blocked the oil line and thrashed it for not long till it died. goog learing curve for him then just ended up staying N/A.

Post by **crack** » Tue Apr 17, 2007 9:37 pm

sorry not a mechanical guru but whats an aftercooler? i assume its the same as an intercooler. how does it work?

Post by **Juzfishin** » Thu Apr 19, 2007 7:28 am

PGS 4WD wrote:Normally I'd say it might hurt the economy a bit as unlike a turbo it has to be driven by the engine, it takes HP to drive the blower, I cant remember the exact spec but a 2500 HP drag car looses about 500 Hp driving the blower, I'ts on the net somewhere precisely.
Joel

If 20% of HP was pi$$ed up against the wall by running a supercharger, no one would use them, even with the disadvantage of turbo lag the turbo charger would be king. I think you'll find it is way way less than 20% power used to pump air........probably 2% or less.

Juz

Post by **smurf182** » Thu Apr 19, 2007 6:30 pm

I think the power required to run the supercharger would vary with the size and type (positive displacement, dynamic etc) of the supercharger.

An interesting article:
http://en.wikipedia.org/wiki/Supercharger

Post by **tweak'e** » Thu Apr 19, 2007 7:47 pm

Juzfishin wrote:
PGS 4WD wrote:Normally I'd say it might hurt the economy a bit as unlike a turbo it has to be driven by the engine, it takes HP to drive the blower, I cant remember the exact spec but a 2500 HP drag car looses about 500 Hp driving the blower, I'ts on the net somewhere precisely.
Joel
If 20% of HP was pi$$ed up against the wall by running a supercharger, no one would use them, even with the disadvantage of turbo lag the turbo charger would be king. I think you'll find it is way way less than 20% power used to pump air........probably 2% or less.

Juz

afaik hes actually right, superchargers to rob a lot of power when in use. they way a lot of manafactures get around that is to disconnect (eg toyota) or bypass (eg holden v6) when on cruise.

i'll have to dig the my old supercharger book out but they wsa a guy that did a lot of testing with 6/71's. he had it bolted directly to a 300hp motor and it would stall it trying to make 6lb of boost.

turbo's are not all that great either. they can rob a fair bit of power themselves exspecially by makeing large amount of backpressure.

Post by **PGS 4WD** » Thu Apr 19, 2007 11:09 pm

Thanks for the support guys. Dr Carl Krejenoski or whatever his name is did the best report on a top fuelller youll ever read, some other cool details are that by 1/2 track the spark plugs have melted and the engine is dieselling on the combustion heat, thats why they shut the fuel off to stop em, and there is so much fuel going in that if the engine missfires the fuel hydraulic locks and the blower blows off and rods smash, cool. Even beter the engine only revolves about 600 revolutions in the length of the 1/4 mile. I love fast s**t

An aftercooler is what some people call a water to air intercooler in a PD blower that sits in the intake manifold after the blower. like a heater core with a remote radiator. Harrop and PWR use them on their Gen3 Kits.

Joel

Post by **Sic Lux** » Fri Apr 20, 2007 12:03 am

yeah fuelers are cool i'll have to find a thing i had that said all that kind of stuff like something around 40amp to each plug and how they run on the verge of hydrulic lock and something like a stock 426 chev wouldn't be able to run the blower and so on.

Post by **dominic** » Fri Apr 20, 2007 11:42 am

cant remember the name of teh bloke you wrote it but i have a book called 'supercharged' (corky bell springs to mind??)and it is fantastic.give syou all teh data you need to configure a supercharger set up for your car.
mostly deals with petrol motors but if your interested in supercharging its well worth a read.

cheers
Dom

Post by **PGS 4WD** » Fri Apr 20, 2007 7:57 pm

I've got that book, the guy that wrote this stuff is an Aussie, he used to be on triple J and the ABC, Dr Carl.

Joel

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