3b twin scroll turbo (1 Viewer)

[ERNRAM]

Based on thr first post:

Billet GTX Turbo 2.2" TD04HL-13T w/ 8.5cm T25 Hsg &9 Blade Wheel

 

[gerg]

So the original turbo is from a Volvo. Specifically im not sure I go by serial numbers. it uses a td04hl housing with regular 12blade hl turbine and a standard 6+6 13t compressor.

The above link is for a single scroll 8.5 cm housing which would not see much of the benefits of the manifold and exhaust housing im using. Mine is an 8.5 divided manifold and housing. That one above is a single scroll housing for a log manifold.

I appreciate the plotting you have done Ernie. I tried to make it very drivable and have found that it is pretty much never off boost, certainly not when your shifting. Im pretty stoked.

 

[Gengis]

So, is it still worth using a twin scroll if you don't have the fancy manifold, and, where do you place the EGT sensor for optimum reading??

 

[ERNRAM]

Gerg,

I understand your second paragraph more clearly now. The images below pictorially show what you stated above.

Thanks for the learning opportunity.

Please just document the details on the turbo and we can follow the leader.

Thanks
Ernie

 

[gerg]

So I gotta say im not the leader by far but thank you. This is very old technology but I do appreciate the compliment. Nice to bring it home to some little diesel engines. You can use a divided exhaust housing with a non divided manifold but you would be better off using a single scroll housing as flow would be sketchy unless you smoothed out the septum in the middle of the flange. Guys do it, but it is a shame.

I posted up that I located the egt probe where the 1st and 4th runners converge sampleing the cylinders that tend to get les air and thus run higher egts overall. I figured that was safer.

 

[Gengis]

Cheers Greg
All a lot clearer now.

 

[cruisedeisel]

Cool stuff gerg. I vote for gerg, gerg for president.

 

[gerg]

Ohhh now somehow don't think that would end well....

 

[Gengis]

Could not be worse than what you guys got today!!!! IMHO

 

[Dougal]

View attachment 1348696
The goal is to match thr higher and earlier torque curve if the 2F

Where did you get that fuel consumption curve?

 

[ERNRAM]

From a 1991 Spector Catalog

 

[ERNRAM]

Dougal,

Since I know your going to ask.....here is what you want.

The 3B is below

 

[ERNRAM]

The 3B is in the 190 range in the 2500rpm range where is 2F is around 260.

260/190= 1.36

So this points to a 36℅ fuel consumption versus the 2F. If your 2F is getting 14mpg, then the 3B will get almost 20 mpg, and you can furthet reduce frictional losses with higher gearing / taller tires.

 

[Dougal]

Dougal,

Since I know your going to ask.....here is what you want.

The 3B is belowView attachment 1349383

Brilliant, thanks. 190-250 g/hp-hr which is 256-340 g/kwh.

 

[Dougal]

The 3B is in the 190 range in the 2500rpm range where is 2F is around 260.

260/190= 1.36

So this points to a 36℅ fuel consumption versus the 2F. If your 2F is getting 14mpg, then the 3B will get almost 20 mpg, and you can furthet reduce frictional losses with higher gearing / taller tires.

Not to mention, those BSFC numbers will be at full load. Petrols get worse quickly at lower load due to throttling losses (but gain a little when they drop enrichment). Diesels are a lot flatter across the load range (vertical scale on the graph) and appear to be largely dilution of idle torque.

 

[ERNRAM]

From a 1991 Spector Catalog

1HD Turbo and 1HZ info

 

[ERNRAM]

1HD Turbo and 1HZ info

View attachment 1349582

View attachment 1349583

View attachment 1349584

2H below

 

[GTSSportCoupe]

ENRAM, that is a gold mine of info. I can't tell you how many times I've looked in vain for that data. Thanks so much for posting those!!!!!!!!!!

 

[ERNRAM]

ENRAM, that is a gold mine of info. I can't tell you how many times I've looked in vain for that data. Thanks so much for posting those!!!!!!!!!!

Welcome sir

 

[GTSSportCoupe]

I'll throw in the only one I have which is the 2LTE engine (sorry to further side track your thread Greg!).