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Forum: performance & modifications 11-14-2019, 01:46 PM
Replies: 86
Views: 1,887
Posted By Duder
0.42 A/R and M24 are specific only to the housing...

0.42 A/R and M24 are specific only to the housing that they are cast into, and don't pertain to the turbo as a whole.

A/R is a design attribute and every housing has a value for this, and they are...
Forum: projects & restorations 11-13-2019, 11:27 PM
Replies: 617
Views: 202,376
Posted By Duder
That's a great question! I like to think of...

That's a great question!

I like to think of it as A) because it fits the car so well. The answer is I really don't know.

If you look back at the earlier photos in this thread you'll see the car...
Forum: performance & modifications 11-13-2019, 07:33 PM
Replies: 28
Views: 649
Posted By Duder
Throat width is represented by the little yellow...

Throat width is represented by the little yellow line I drew in the turbine here...it's a twin-scroll but same idea, just ignore the divider wall.

https://i.imgur.com/S7H49AXl.jpg

And then a...
Forum: performance & modifications 11-13-2019, 06:53 PM
Replies: 28
Views: 649
Posted By Duder
I'm not an aerodynamic expert, but essentially it...

I'm not an aerodynamic expert, but essentially it is un-shrouding the wheel a bit, and increasing the nozzle flow area which will slow down the gas velocity.

The nozzle is the thin little ring...
Forum: projects & restorations 11-13-2019, 06:09 PM
Replies: 617
Views: 202,376
Posted By Duder
No problem. It's as much for my own sanity as...

No problem. It's as much for my own sanity as anyone else's; I like looking back at progress made in the past (and remembering that there's still a bunch left to do).

Eventually I'll migrate all...
Forum: projects & restorations 11-13-2019, 02:51 AM
Replies: 617
Views: 202,376
Posted By Duder
I went through and rid my thread of photobucket...

I went through and rid my thread of photobucket as much as possible, finally eradicating all the broken and/or fuzzy img links. Stupid predatory capitalist pigs!

The early photos should all be...
Forum: performance & modifications 11-12-2019, 08:26 PM
Replies: 28
Views: 649
Posted By Duder
That is a nice solution, especially for packaging...

That is a nice solution, especially for packaging an external gate with a stock style manifold.



To me this means that they chose the throat width to match the GT30 turbine wheel, so it'll be a...
Forum: performance & modifications 11-12-2019, 07:03 PM
Replies: 28
Views: 649
Posted By Duder
The as-cast port diameter is just under 25mm...

The as-cast port diameter is just under 25mm standard, and it's at 90 degrees to the flow. This housing dates back to the SR20DET and RB26DETT OEM applications so likely undersized for what you'll be...
Forum: performance & modifications 11-12-2019, 06:12 PM
Replies: 28
Views: 649
Posted By Duder
It may also be academic, but your engine will...

It may also be academic, but your engine will flow more than the choke flow curve from the turbine map, even after un-correcting back to physical flow. Any wastegated exhaust flow adds to the turbine...
Forum: performance & modifications 11-12-2019, 06:09 PM
Replies: 28
Views: 649
Posted By Duder
No worries. Radial turbines are fascinating and...

No worries. Radial turbines are fascinating and frustrating. They don't behave in an easy to grasp intuitive way...and to get that intuitive grasp you have to play around with the full maps...
Forum: performance & modifications 11-12-2019, 05:22 PM
Replies: 86
Views: 1,887
Posted By Duder
A 3582 is definitely overkill for 300-350whp, for...

A 3582 is definitely overkill for 300-350whp, for sure. It's more like a ~500-600whp turbo. But then again I'd argue that any Holset from a later 5.9L Cummins is also oversized...main difference is...
Forum: performance & modifications 11-12-2019, 05:14 PM
Replies: 28
Views: 649
Posted By Duder
I used this GT/GTX30R turbine flow chart as a...

I used this GT/GTX30R turbine flow chart as a reference for your T3:

https://i.imgur.com/ECwghKZl.jpg


And here's the GT/GTX28R:

https://i.imgur.com/fHTGWO2l.jpg
Forum: performance & modifications 11-12-2019, 05:07 PM
Replies: 28
Views: 649
Posted By Duder
That turbine housing won't fit on a GT28R or...

That turbine housing won't fit on a GT28R or GTX28R though. Different turbine wheel and shroud contour machining.



You can use the choke flow curves that are published for each wheel/housing...
Forum: projects & restorations 11-12-2019, 03:24 PM
Replies: 62
Views: 2,540
Posted By Duder
This is probably the nicest looking 145 I've ever...

This is probably the nicest looking 145 I've ever seen. That color really flatters the car. Good luck getting it roadworthy - keep posting here and don't get discouraged!
Forum: performance & modifications 11-12-2019, 03:14 PM
Replies: 28
Views: 649
Posted By Duder
"Drive pressure" is a misnomer from the diesel...

"Drive pressure" is a misnomer from the diesel truck world - it's not the pressure that drives the turbine, it's momentum transfer from the exhaust gas molecules physically hitting the turbine...
Forum: performance & modifications 11-12-2019, 03:08 PM
Replies: 86
Views: 1,887
Posted By Duder
HE351 and GT3582R are pretty close in terms of...

HE351 and GT3582R are pretty close in terms of wheel diameters, for the record. The Holset has a larger compressor but the Garrett has a larger turbine.

Compressor
HE351CW: 86mm exducer
GT3582R:...
Forum: performance & modifications 11-12-2019, 02:16 PM
Replies: 28
Views: 649
Posted By Duder
Good advice here. The T25 style OE Garrett...

Good advice here. The T25 style OE Garrett turbine housings are a better match aerodynamically to the GT28 turbine wheel. The ATP housing, while convenient on a Redblock, isn't optimal. I did some...
Forum: projects & restorations 11-08-2019, 03:17 PM
Replies: 14
Views: 1,186
Posted By Duder
Do you have a bolt supply house or well-stocked...

Do you have a bolt supply house or well-stocked hardware store somewhere in driving distance? I find that's the most cost effective way to get a bunch of hardware quickly for a project. Get a set of...
Forum: article composition 11-02-2019, 11:35 PM
Replies: 503
Views: 260,910
Posted By Duder
Have that beer, but then PM me your name &...

Have that beer, but then PM me your name & address and I'll send you a replacement board, on the house. I'll just ask you to cover shipping. Mistakes happen! :cheers:
Forum: projects & restorations 11-02-2019, 11:33 PM
Replies: 184
Views: 49,607
Posted By Duder
Awesome progress and trip reports. I'm jealous...

Awesome progress and trip reports. I'm jealous you got yours done so quickly. But happy to read that you're driving it and enjoying it.

The wheels have an almost gothic look to them on the 240,...
Forum: performance & modifications 10-30-2019, 06:03 PM
Replies: 13
Views: 1,404
Posted By Duder
Or you can run wasted spark and ditch the...

Or you can run wasted spark and ditch the distributor altogether :-D
Forum: projects & restorations 10-30-2019, 11:24 AM
Replies: 40
Views: 1,860
Posted By Duder
I'm sure you could get the later e-codes to fit,...

I'm sure you could get the later e-codes to fit, but the trim and mounting and side-to-side width will all be different and not look good with your hood, grille, or fenders.

The early "TV screen"...
Forum: projects & restorations 10-28-2019, 01:23 PM
Replies: 587
Views: 140,727
Posted By Duder
Save it! That's a sweet looking wagon. Brace the...

Save it! That's a sweet looking wagon. Brace the rockers maybe, drill out the spot welds, clean and treat the seams, weld the new floor in. Crazy amount of damage from that driveshaft failure. Were...
Forum: projects & restorations 10-26-2019, 11:53 AM
Replies: 738
Views: 201,551
Posted By Duder
Modern Golf-based VWs are great cars. I can only...

Modern Golf-based VWs are great cars. I can only imagine how much fun that R is. The 242 is looking minty fresh. I hope drool will bead up on the Griot's waxed surface.

Congrats on the SEMA /...
Forum: projects & restorations 10-18-2019, 11:17 PM
Replies: 141
Views: 38,777
Posted By Duder
:nod: :nod: :nod: ...

:nod: :nod: :nod:

http://i.imgur.com/oHmoYikl.jpg (https://imgur.com/oHmoYik)
Forum: projects & restorations 10-17-2019, 04:57 PM
Replies: 19
Views: 3,784
Posted By Duder
Y U RUNE KLASSIK?! :wtf: (you need one of...

Y U RUNE KLASSIK?! :wtf:

(you need one of the stickers like we have on the Opile)

http://i.imgur.com/jUENP0vl.jpg (https://imgur.com/jUENP0v)
Forum: projects & restorations 10-17-2019, 12:59 PM
Replies: 637
Views: 240,691
Posted By Duder
Your answer is in the thread title :-P

Your answer is in the thread title :-P
Forum: projects & restorations 10-07-2019, 04:50 PM
Replies: 382
Views: 141,914
Posted By Duder
Best 240. Would daily!

Best 240. Would daily!
Forum: performance & modifications 10-07-2019, 02:15 PM
Replies: 7
Views: 718
Posted By Duder
Here are a few more (!) reasons to go with...

Here are a few more (!) reasons to go with something else:

(from Mike Kojima at MotoIQ, here: https://motoiq.com/5-performance-car-engines-that-suck/2/)
Forum: performance & modifications 10-07-2019, 02:09 PM
Replies: 7
Views: 718
Posted By Duder
4AGE makes no sense in a 240 other than as a...

4AGE makes no sense in a 240 other than as a novelty, for reasons others have mentioned. Unless you put the 240 on a strict diet and get weight down to Miata levels it's just not going to be very...
Forum: performance & modifications 09-30-2019, 11:23 AM
Replies: 17
Views: 1,084
Posted By Duder
Another thing that I know is confusing: if you're...

Another thing that I know is confusing: if you're comparing turbine housings for the same turbine wheel, and same A/R, the "T3" vs "T4" distinction usually only refers to the inlet flange and a bit...
Forum: performance & modifications 09-30-2019, 11:20 AM
Replies: 17
Views: 1,084
Posted By Duder
To make the same flow on a twin scroll turbine...

To make the same flow on a twin scroll turbine housing, you have to run a larger A/R than you would with mono-scroll on the same turbine wheel. Twin scroll places a wall in the middle of the flow...
Forum: projects & restorations 09-22-2019, 02:57 AM
Replies: 1,464
Views: 330,183
Posted By Duder
Just do what we did on our Lemons car, Harald -...

Just do what we did on our Lemons car, Harald - get an ATL fuel cell with an integrated sump snork in the bladder floor, hook up one pump to that, then another with the inlet hose suspended up off...
Forum: projects & restorations 09-20-2019, 11:37 PM
Replies: 1,464
Views: 330,183
Posted By Duder
In-tank pump?

In-tank pump?
Forum: projects & restorations 09-17-2019, 08:57 PM
Replies: 48
Views: 5,671
Posted By Duder
Yeah, it was an interesting fellow in the Boston...

Yeah, it was an interesting fellow in the Boston area. Car was #91 light green originally but had been repainted black. I have no capacity for another project right now but it would be cool to see if...
Forum: projects & restorations 09-17-2019, 01:53 PM
Replies: 48
Views: 5,671
Posted By Duder
Looking great - impressive work so far. Seeing...

Looking great - impressive work so far. Seeing your progress is making me regret selling my wife's '66 1800S a few years ago. We called it the Duckling because it was so ugly. It needed roughly the...
Forum: projects & restorations 09-13-2019, 02:32 PM
Replies: 831
Views: 210,547
Posted By Duder
Makes sense; thanks for explaining. That blows...

Makes sense; thanks for explaining. That blows goats about the cracked cylinder! I have a good used B21F shortblock I could donate to the cause if it would help. It's down here in smog city though.
Forum: projects & restorations 09-13-2019, 02:22 PM
Replies: 831
Views: 210,547
Posted By Duder
Fair enough; I'm sure there'd be some unique...

Fair enough; I'm sure there'd be some unique challenges jamming that into your engine bay.

Price-wise though... wouldn't it be more than $3k to build up a nice B230 (that flows as well as a 16V)...
Forum: projects & restorations 09-13-2019, 12:59 PM
Replies: 831
Views: 210,547
Posted By Duder
Karl Buchka has a complete 16V engine with Link...

Karl Buchka has a complete 16V engine with Link and wiring harness for sale in the classifieds - that might be the most expedient option!

Edit - here it is:...
Forum: projects & restorations 09-10-2019, 11:18 PM
Replies: 1,464
Views: 330,183
Posted By Duder
Prepare to fall into a rabbit hole. The guy...

Prepare to fall into a rabbit hole. The guy started with a 308 and a V12 from a 400i. He added Testarossa heads to the V12, but there's not much left of the original head castings at this point...
...
Forum: projects & restorations 09-10-2019, 07:06 PM
Replies: 1,464
Views: 330,183
Posted By Duder
Have you seen that thread on the Grassroots...

Have you seen that thread on the Grassroots Motorsports forum where the guy basically built his own Ferrari V12 out of welding rod!? It's not far off...
Forum: projects & restorations 09-09-2019, 11:30 PM
Replies: 576
Views: 137,321
Posted By Duder
That's a badass Gremlin. I like the wheel & tire...

That's a badass Gremlin. I like the wheel & tire combo.
Forum: performance & modifications 09-08-2019, 02:01 PM
Replies: 8
Views: 1,012
Posted By Duder
Check your turbine wheel & compressor wheel for...

Check your turbine wheel & compressor wheel for damage...
Forum: projects & restorations 09-05-2019, 02:13 PM
Replies: 831
Views: 210,547
Posted By Duder
True - but with your long bent tube between the...

True - but with your long bent tube between the turbine housing and wastegate inlet, you've got more restriction between the main exhaust flow path and the wastegate valve.

The wastegate is...
Forum: projects & restorations 08-30-2019, 05:18 PM
Replies: 831
Views: 210,547
Posted By Duder
Turbine housing to wastegate plumbing will be...

Turbine housing to wastegate plumbing will be quite restrictive and likely the cause of your creep.
Forum: projects & restorations 08-29-2019, 10:35 PM
Replies: 672
Views: 242,717
Posted By Duder
Sorry to hear about your recent issues, but man...

Sorry to hear about your recent issues, but man this car is sounding and looking super sweet. Definitely something to be proud of regardless of how many silly failures may pop up.

Regarding the...
Forum: performance & modifications 08-20-2019, 12:46 PM
Replies: 12
Views: 1,058
Posted By Duder
It will work for startup and idling and very...

It will work for startup and idling and very light driving, for a while. It depends on your engine, turbo system, and state of tune - but - if you get up anywhere near a "normal" gasoline full-load...
Forum: performance & modifications 08-19-2019, 11:00 PM
Replies: 12
Views: 1,058
Posted By Duder
Do you mean between the exhaust manifold and...

Do you mean between the exhaust manifold and turbine inlet? If so, then no.
Forum: performance & modifications 08-19-2019, 04:23 PM
Replies: 11
Views: 1,574
Posted By Duder
The 2-door (3 door?) VW Golf seats will have the...

The 2-door (3 door?) VW Golf seats will have the same tilt-forward function as the C30, I just realized. Those came with a cloth upholstery option too. The VW pleather is called V-Tex and is pretty...
Forum: performance & modifications 08-19-2019, 04:16 PM
Replies: 11
Views: 1,574
Posted By Duder
In an older car there's something to be said for...

In an older car there's something to be said for keeping it period correct, so maybe rebuilding the stock seats is a decent idea.

On the other hand if you're looking at a swap to something more...
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