Diff. between Petrol TUrbo and Disel turbo.
 

what are the key diffirences between a disel turbo and a petrol turbo.
Does anybody have a pic of a petrol turbo oil seal.

Re: Diff. between Petrol TUrbo and Disel turbo.
 

I dont think there is a difference

Re: Diff. between Petrol TUrbo and Disel turbo.
 

No difference at all.

All turbos from T2x to T8X are used, somewhere, on a gas AND a diesel engine.

I'm producijng over 300 WHP on my prelude with a GM 6.5L diesel turbo!

Re: Diff. between Petrol TUrbo and Disel turbo.
 

Holset boy here, off a Dodge Cummins turbodiesel. If split tang housing, do try to pair 1 + 4, 2 + 3, for best results.

Re: Diff. between Petrol TUrbo and Disel turbo.
 

diesel turbos usually have a larger turbine a/r than the ones found on gas motors.

Re: Diff. between Petrol TUrbo and Disel turbo.
 

I was looking at one of the turbos from a ford power stroke today at work, they have variable veins on the compressor side to adjust boost pressure. Kinda cool, too bad it's way too damn big to go on anything I've got.

Re: Diff. between Petrol TUrbo and Disel turbo.
 

newer diesel truck turbos have electronic components, about 8+ wires go into the turbo on my dad's 2004 duramax.

I read somewhere on here that diesel turbos are beefier because they spend more time boosting, and as a result they are heavier and more laggy, but I don't know how true that is after reading what's in this thread so far.

Re: Diff. between Petrol TUrbo and Disel turbo.
 

In our country there are no Petrol Turbo engines.
So all the Junk yard turbos are Disel.
FOr some stupid reason I thought you cant use a Disel turbo on a petrol car.
And landed up spending 300$ importing a Turbo from ebay.
A mate just picked up a Junk yard disel and pluged it in works fine.

What Iv noticed.
1. Disel Turbos are much more sturdy. They are designed to take / run with much higer temps.
2. All the Disel Turbos here use Bushes no ball bearings.
3. The compresor wheel blades design seem to be diffirent.

None of the disel engines we have seen at the junk yard. Have water cooling or a BOV on them.

Re: Diff. between Petrol TUrbo and Disel turbo.
 

so... can we use diesle turbos on our d16s and b16s?

Re: Diff. between Petrol TUrbo and Disel turbo.
 

did you read anything in this thread or just the title? does your d16/b16 run on petrol (gasoline)? if you answered yes to any of these questions then the answer lies before you.

Re: Diff. between Petrol TUrbo and Disel turbo.
 

You guys are 100% right. The turbines are always huge on diesel turbos. When I said they were the same, I was talking mostly about the internals of the turbo.

Most diesel turbos are usefull only if you hybrid the compressor with a smaller automotive turbine. Heck, I made a full time job out of it!!!

Howver, some recent turbos like the Holset, powerstroke garrett and GM 6.5 are NOT standard and cannot be hybrided easily. STill, if you have sufficient flow to use them, good for you!!

For example, the Dodge HOlset and powerstroke turbos are often used on Mustangs with great results. And again, the GM 6.5 (the best of all turbos IMO) will do miracles on B18C, H22, Vr6, 7MgTE and VG30DEt.


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Re: Diff. between Petrol TUrbo and Disel turbo.
 

1. Wrong, they are the same. Exhaust temperatures on a petrol engine are much higher.
2. Not many OEM turbos use ball bearings at all.
3. They are just designed for the air they need to flow.

As a general rule a petrol engine can make 20% more power on the same turbo as a diesel engine because the diesel has less energy blown out the exhaust, and some other factors.

Re: Diff. between Petrol TUrbo and Disel turbo.
 

For the big rigs, sure. For light duty diesels that see a lot of stop and go traffic, no. Common misconception. Keep in mind that most diesels rev to 3000 rpms, so a 10 liter diesel turbo is a good match for a 5 liter gas engine that revs to 6000 rpms.

In my case, the B5.9 Cummins diesel comes equipped with HY35 (tiny 9 cm^2 turbine) or HX35 (12 cm^2) - I'm ignoring the earlier H1E trucks of the early 90s and the 03+ HX40 trucks as those turbos are not as fluent. The HX35 in a 2.0 LS application with substantially constant pressure manifold design starts spooling at 3200-ish, and has 10 psi by 4200 rpm. Spooling higher from there becomes lightning quick. Using pressure wave manifold design, I should have better spool properties on a stock block LS.

Re: Diff. between Petrol TUrbo and Disel turbo.
 

I knew someone was going to say that, thats why I put usually. The majority of the diesel turbos available in the junkyard have larger than the typical 40ish turbine turbos that are readily available.

Re: Diff. between Petrol TUrbo and Disel turbo.
 

readily available in the states..in other countries like europe etc...you got to search a lot and..
they are pretty hard to find , or harder to find then diesel turbo's

Re: Diff. between Petrol TUrbo and Disel turbo.
 

the newer diesels with "electronics" and wires...thats a variable vain turbo...electroniclly self adjusting turbine to make maximum power at any rpm...dont wanna ---- with that ----....

Re: Diff. between Petrol TUrbo and Disel turbo.
 

yeah. semnos right. there in europe it's to hard to find petrol turbos. but diesele - readly availeable. but i thought that diesel turbos are not ready for too hot gazoline exhaust. i am not right? if so, wich turbo i have to have? from wich engine by displacement? for example will T3 diesel turbo from BMW 524 TD will work? it has 2.4 litre.

Re: Diff. between Petrol TUrbo and Disel turbo.
 

Seem to be a lot of misconceptions. On all sides.
Guess it depends on what you see.
Good point there didnt know most OEM Turbos are not water cooled. Live and learn. Thanks.

Well most of the IHI RFB 5 disel turbos Ive seen here. And the Asian turbos are tiny. Starting with the VI13s where you cant fit 2 fingers into the exhaust housing. Going up to the VI 22s.

In my cause I hybrided a VI34 RFB5 with watter and ball bearings with a VI22 Exhaust housing off disel turbo.

The stock VI34 Ex. housing was just to large. No spin till 3500 RPM. No boost till 6500 RPM. WIth the smaller Exhaust housing she spin and boosts much faster. Though honestlly. I still think the first car we did with the Junk yard DIsel turbo came out better.

Re: Diff. between Petrol TUrbo and Disel turbo.
 

AHAH!!! :D

The first turbo I installed on my H22 was a HOLSET 3LD coming from a ford powered industrial snow blower.
This turbo was HUGE, approx equivalent to a T04B. Obviously designed for 24/24hrs heavy duty boosting.
I sharpened the split scroll in the turbine to reduce restriction and slapped it on my prelude without any idea of the specs and flow of the turbo.
It ended up that the turbine, despite it's size, was too small! Boost was coming on like a violent explosion at 2500 RPM and while it was sutaining power all the way to red line, I blew it in a day of track abuse (it was overspinning like crazy)
The downside on truck/indsutrial turbos that are not garrett, is that the specs are not disclosed so it's up to you to do some trial and error. Luckily, it's a lot of fun!
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Re: Diff. between Petrol TUrbo and Disel turbo.
 

huh?
Why would petrols have hotter exhaust temps?
Diesels have much higher static compression ratios and use that for combustion.
I've always assumed their EGs were considerably higher than for petrols.

That would explain why they use big ass turblows.

Re: Diff. between Petrol TUrbo and Disel turbo.
 

anybody have an egt gauge? my dad has one on his duramax, while driving normally egt sits around 500-600 degrees, if you get on it it gets up there, but cruising it doesn't go over 600. I don't know how gas engines compare though.

Re: Diff. between Petrol TUrbo and Disel turbo.
 

umm hondas run ALOT hotter than that kyle

Re: Diff. between Petrol TUrbo and Disel turbo.
 

that's what I figured, but I'm a college educated man now and I know an argument isn't ---- without evidence backing it up, this time evidence is numbers, and I had no numbers.

Re: Diff. between Petrol TUrbo and Disel turbo.
 

Where is his EGT mounted?
You cant rely on just one EGT to give you accurate results when we are talking about diesel turbos in general.

I know for a fact, that diesel compressions are much higher than with petrol.
Because of their resistance to detonation, I would assume they use leaner AFRs and that would equal higher combustion temps.

But I'm not 100% sure, so feel free to correct me.

Re: Diff. between Petrol TUrbo and Disel turbo.
 

Resistance to detonation? They don't resist what doesn't exist :)
In a diesel there IS no detonation, because there is no fuel being compressed.
Also in a diesel, because the burn only happens where the fuel is being injected, you have no lean limit really.
And the more fuel you inject, the higher the exhaust temperature will be, thus too rich means melting your engine, lean is playing it safe.

Re: Diff. between Petrol TUrbo and Disel turbo.
 

Not familiar with the 3LD (I had a 3DLZ at one point, off a Porsche of some sort, which is apparently a KKK/Holset/somebody else group effort design... but that's OT). I know most of the HX30's are used for stationary generators, are fairly petite, and most people are amazed (based on comparative size) that they are equivalent to a slightly more efficient .50 trim T04E/T3 hybrid.

Holsets like high pressures - most don't become any more efficient than a dinosaur T04B until they hit above 12-15 psi. I'd say your blown turbo - wasn't. Diesels don't run a lot of oil pressure, and the ~0.080" 'restrictor' found in the OEM feed line is typically way to big for a high oil pressure gas engine. You probably just flooded the bearings, the turbo started passing a ton of oil, and the turbo might be a happy little camper again with a little dissassembly and cleanup. Look for minor coking where oil was passing the turbine wheel/ring seal - if you're lucky you won't even have to replace the ring seal and can just clean off the coking and toss it back together.

I've got a pretty good grasp of common US Holsets made through the 90's - more or less. When I have a question, or am looking to buy one with a warranty for cheap (lots cheaper than Garrett equivalents, the HX series are GT series equivalents), I call Jaymez at Diesel Injection Service in Cincinnatti, OH. He's a super cool guy, racer friendly, and has busted his hump for me over speshul riceboy requests in the past.