supercharger and turbo ideas on sd33t

[taz01]

have a nissan sd33t was thinking of adding a supercharger((rootes type) through a water cooled intercooler leaving the turbo standard .....will i need to add larger injectors? or anything else

[KiwiBacon]

I think you'll need a new head and precombustion chambers before anything else.

The diesels which take boost best are direct injection. Stronger head design, no precombustion chambers to crack apart and smash pistons and higher efficiency to boot.

[taz01]

done abit of readin up and so far found i need to up the injectors that all the aussie guys are doing ...........

[skid]

I think you'll need a new head

the one on his shoulders,already has some weird ideas

wot makes ya think a new one will be any better

[tweake]

i would not use stock turbo. turbo is normally kept small to get boost up early. but the supercharger will do that instead. so you should be able to use a much bigger turbo which will be more suited for higher boost and more flow at high rpm.

also look at lower compression a little bit as you should be able to get away with lower comp due to the supercharger and it should allow for more boost. just make sure the starter motor can handle turning the motor and supercharger.
don't forget bypass valve for the supercharger.

[taz01]

have now planned to try supercharger on a non turbo engine first with over fueling the pump should work if all goes well will add larger turbo to other engine plus charger and oversized injectors ???? 250hp?????

[KiwiBacon]

There are two distinct questions here.

The first question is:
Can it be done? The answer is "Yes".

The second question is:
Should it be done to an SD33? The answer is "No".

[taz01]

There are two distinct questions here.

The first question is:
Can it be done? The answer is "Yes".

The second question is:
Should it be done to an SD33? The answer is "No".

any reason why not??.......sd33 motor is never going to be used for anything else i thought the kiwi attitude of give it a go....

[Jerry]

have you thought about welding 2 sd33's together to make a V12 diesel

[wgtnnewbie]

have you thought about welding 2 sd33's together to make a V12 diesel

sheesh Dr Tazenstein doesn't need anymore ideas he has plenty as it is.......................

[tweake]

i wasn't thinking of masive power increase but rather supercharger providing boost at idle which should give far better drivability and a bigger turbo should give decent boost at a lower temp and be more efficent.

the only real problem, is it worth the $$$ ?

[KiwiBacon]

any reason why not??.......sd33 motor is never going to be used for anything else i thought the kiwi attitude of give it a go....

Because those engines die at stock power levels, they can't handle any more. You can get a very robust diesel like the Isuzu 2.8 for only a few hundred $ which will actually last and be usable at the end of the project.

[Sadam_Husain]

Be a lot less farking around to drop something in there with a few extra cylinders Taz


Disclaimer: Petrol vs Diesel, Nissan vs Toyota... blah blah blah and all those other stoopid farking arguments????

[williamhamilton]

Be a lot less farking around to drop something in there with a few extra cylinders Taz

Disclaimer: Petrol vs Diesel, Nissan vs Toyota... blah blah blah and all those other stoopid farking arguments????

This should have just about enough power for you and already super charged. http://www.trademe.co.nz/Trade-Me-Motors/Car-parts-accessories/Chevrolet/Engines/auction-206775674.htm

W

[taz01]

any reason why not??.......sd33 motor is never going to be used for anything else i thought the kiwi attitude of give it a go....

Because those engines die at stock power levels, they can't handle any more. You can get a very robust diesel like the Isuzu 2.8 for only a few hundred $ which will actually last and be usable at the end of the project.

to my knowledge (not alot) the sd33 were one of the most robust diesel engine ever made, they still run em in buses all over and why do people throw a turbo on a 4.2 saffy with no engine mods a turbo would be just as hard on an engine wouldnt it
but any ideas thoughts are most welcome it all helps........

[KiwiBacon]

any reason why not??.......sd33 motor is never going to be used for anything else i thought the kiwi attitude of give it a go....

Because those engines die at stock power levels, they can't handle any more. You can get a very robust diesel like the Isuzu 2.8 for only a few hundred $ which will actually last and be usable at the end of the project.

to my knowledge (not alot) the sd33 were one of the most robust diesel engine ever made, they still run em in buses all over and why do people throw a turbo on a 4.2 saffy with no engine mods a turbo would be just as hard on an engine wouldnt it
but any ideas thoughts are most welcome it all helps........

The experiences of the guys who rebuild them doesn't make them sound in any way robust. Talk of pistons, heads and precombustion chambers cracked.
This in an engine that in factory form is supposed to run about 6.5psi boost.
In contrast people run the Isuzu 2.8's past 30psi, guys overseas drag race them.

You're talking about adding a supercharger and increasing fuelling. This adds a lot more stress to a motor that already has components known for cracking.
The TD42 is one of the most robust indirect injection engines around, it's the only one that IMO can have more than mild boost added and still survive. It's not in the same league as the SD33T.

Maybe pickup a TD27T and go to town on that instead?

[nz4x4]

the sd33t is prone to destroying heads. have a look at the international scout forum (dont have the address with me sorry)
I went down the track of working the sd33t in my old wagon but found from my research (100's of hours on the net and ringing engine builders etc) that it was going to be a bad move. if you want more horsepower you have the wrong engine. the sd33t does what it does

[allmud]

what a cool idear
will look cool in the nissan just do it i say
dont think about what can go wrong till it dose lol

[Jerry]

Could always put a jet engine on the back for extra boost

http://www.youtube.com/watch?v=l-spt7y1 ... ecommended

[Steve_t647]

Just to throw a spanner in the works, you could get a nos type kit that puts LPG into the intake, this is common in Europe for diesel truck's and buses passing diesel emissions.

It works best in turbo diesels and is like NOS in petrol's, the difference is LPG will not pre-ignite in a diesel the diesel has to burn to ignite the LPG, the affect it has is it increases the duration of the burn, makes the diesel burn more completely and has some cooling effect (liquid to gas conversion) on the intake.

The extra gas in the exhaust would help the turbo spool earlier too.

I played with one for a while but the second time I had no gas for the BBQ I gave up on it and now have a petrol anyway (road tax and oil changes so often annoyed me). mine was umm very basic (read continuous through a NOS jet) but it was a noticeable improvement.

[KiwiBacon]

It works best in turbo diesels and is like NOS in petrol's, the difference is LPG will not pre-ignite in a diesel the diesel has to burn to ignite the LPG, the affect it has is it increases the duration of the burn, makes the diesel burn more completely and has some cooling effect (liquid to gas conversion) on the intake.

The extra gas in the exhaust would help the turbo spool earlier too.

Yes LPG does preignite in a diesel, it is the LPG which causes earlier ignition of the diesel and not the other way around. That shortens the duration of the burn, the result is very similar to simply advancing your injection timing but is much more aggressive and damaging to pistons and rings.
You're also adding more fuel which increases EGT's

The amount of complete bollocks being spread by marketers of these systems is truely amazing.

[Shane]

It works best in turbo diesels and is like NOS in petrol's, the difference is LPG will not pre-ignite in a diesel the diesel has to burn to ignite the LPG, the affect it has is it increases the duration of the burn, makes the diesel burn more completely and has some cooling effect (liquid to gas conversion) on the intake.

The extra gas in the exhaust would help the turbo spool earlier too.

Yes LPG does preignite in a diesel, it is the LPG which causes earlier ignition of the diesel and not the other way around. That shortens the duration of the burn, the result is very similar to simply advancing your injection timing but is much more aggressive and damaging to pistons and rings.
You're also adding more fuel which increases EGT's

The amount of complete bollocks being spread by marketers of these systems is truely amazing.

Well there you have it,all those people that had L.P.G kits fitted just needed to advance there timing(they should also invest in a rebuild kit with new pistons/rings just in case they melt )

[Flash2004]

You can believe this ...or not, but I've had 3 SD33's over the years, one (86 MQ flatdeck) was a naturally aspirated pig but lasted forever while everything else fell off around it. In an effort to try and find out why it was so sluggish we dyno tested it and with gear losses calculated figured it was putting out the 100hp on the label. I don't know what gave me the idea but i advanced the spil (pump) timing only a little bit and it flew (by comparison) and then dyno tested at a corrected 150hp! That's the believe it or not, and the engine ran great like that for all the time I had it.

Another SD33, MQ flatdeck this time with an aftermarket turbo kit shit itself quite quickly without ever impressing and now lies under a hedge.

Another SD33T in an 86 safari 5 speed 3 door went like a rocket straight out of the box, its done about 600ks now and still going with my brother using it. The body's falling off, but it will still crack 160k any time you ask it. It'll burn a sump full of oil for no reason but be fine most of the time. It can be a bitch to cold start and we've spent hundreds on glowplugs over the years. Smokes like a bastard when cold and does everything wrong but still goes.

So are they a good engine? I'd say they are, but there's a limit with any engine. cheers.

[taz01]

You can believe this ...or not, but I've had 3 SD33's over the years, one (86 MQ flatdeck) was a naturally aspirated pig but lasted forever while everything else fell off around it. In an effort to try and find out why it was so sluggish we dyno tested it and with gear losses calculated figured it was putting out the 100hp on the label. I don't know what gave me the idea but i advanced the spil (pump) timing only a little bit and it flew (by comparison) and then dyno tested at a corrected 150hp! That's the believe it or not, and the engine ran great like that for all the time I had it.

Another SD33, MQ flatdeck this time with an aftermarket turbo kit shit itself quite quickly without ever impressing and now lies under a hedge.

Another SD33T in an 86 safari 5 speed 3 door went like a rocket straight out of the box, its done about 600ks now and still going with my brother using it. The body's falling off, but it will still crack 160k any time you ask it. It'll burn a sump full of oil for no reason but be fine most of the time. It can be a bitch to cold start and we've spent hundreds on glowplugs over the years. Smokes like a bastard when cold and does everything wrong but still goes.

So are they a good engine? I'd say they are, but there's a limit with any engine. cheers.

and there you have it guys, was my understanding about these engines as well.....so my sd33 non turbo pos is going to be supercharged crank the pump open and let loose...those who know me know that i dont have a throttle but a on off floor switch and after a couple of runs i will bolt a s/charger to my sd33t.............

[skid]

maaaaate, I cant believe you replied and didnt even ask about the one under the hedge

did ya hassle my boss and get a resounding no yet

[KiwiBacon]

Well there you have it,all those people that had L.P.G kits fitted just needed to advance there timing(they should also invest in a rebuild kit with new pistons/rings just in case they melt )

Pretty much, they should also tell their insurance companies what they're doing so they can find void their cover now rather than later.

[zookfest]

the idea of having the supercharger for extra power from idle is good,the engine drives the supercharger
the idea of having a big turbo is no good as it will have too much lag

as kiwibacon said decent diesel turbo motors are direct injection and can handle extra boost,and as for robust engines
take my 13bt. rolled it left it running upside down had crank machined and new bigends turns out my crank was twisted from previously being hydroliked and had been running 15psi boost for the last 3 years witch is tripple standard boost on a twisted crank with a 95% blocked radiator.never missed a beat

Its in my new truck now