Aussieveedubbers · VW Drag Racing

Long term project - Bug type 4 turbo

https://forums.aussieveedubbers.com/threads/100017/long-term-project-bug-type-4-turbo

4agedub ·

Over time I've gathered a bunch of parts.. so I think it's about time to start with my long term project.

Now here's the plan:
1971 VW Beetle (that I've already got as a donor)

It will be dropped to the floor, riding on a set of 15" fuchs with 911 discs. Raised transmission and adjustable front end with pie cut chassis for plenty caster.
Caged interior with two race seats. Only the bare minimum bits to keep weight down.

The power plant is a type 4 big cc engine (that I've already got)
- Cu engine casing
- 80mm stroker scat crankshaft
- Carillo H-beam rods
- Web 86b camshaft
- Scat lifters with oil hole
- Cromoly pushrods
- Magirus Deutz sleeves
- 103mm forged flat top pistons
- CU cylinder heads that's been opened with 45mm and 42mm valves
- 12:1 compression
- Intake plenum setup with 75mm throttle body, Methanol injection
- Garrett gt35 turbo (that I still need to buy), Changed to twin toyota turbos
- Xcell 38mm waste gate
- Xcell dump valve

The gearbox I still need to look at... It def needs a solid spool diff as I want to attempt drifting this baby.

4agedub ·

The firewall was removed to make space for the intake system and charge cooler. Next step in the process is to build the exhaust manifolds

4agedub ·

I've started with the intake system some time ago. The intake manifolds will house 8 injectors in total. One set of 680cc and one set of 875cc that will be staged as the boost comes in

cnfabo ·

hi louis, my friend here who is also from south africa built a almost stock 2ltr t4 engine turbo that produced over 400hp...you are going to have fun 🙂

that shroud he has one that looks the same from memory, is that the one made by some guy over in south africa??

fabo

4agedub ·

I've got another fan shroud that we will be using, this one was only to check for clearance. The other shroud is similar to the DTM housing.

Gracey ·

Intake looks good.

What sort of boost are you planning on running?

4agedub ·

About 7psi. The engine is high compression, with little boost it should react pretty good.

humpty ·

This all sounds/looks very interesting... Keep it coming.

SebastienPeek ·

This is going to be one hell of a build, keen to see this come to fruition.

type4turbo ·

hi Louis, I am fabo's friend that comes from south africa.
I Have been racing Type 4 engines for a long time (turbo and N/A).
Sounds like a nice project that u have there.
Is the other fan shroud that you have one of Armant's kits (IMPI)
I have one of his kits on my Turbo engine, Works great, fits great and looks almost stock.
I have a Porsche shroud on my N/A engine.
Have fun with your newest project....
Cheers, Hermann.

fish26 ·

the Hermann has sniffed out type 4 power, mate tell us more about your race engines

type4turbo ·

hi fish26.
my turbo engine has always been almost all genuine vw parts, (stock 71mm crank, stock polished rods, 1mm oversize KS pistons, reground cam, with solid lifters, stock ally pushrods, roundport heads, ported and 44 x 38mm valves (fron a old nissan skiline), everything balanced, 6,8:1 comp, chev valve springs, vw 2.1 waser boxer ignition (locked at 24), garrett T4 turbo, boosted to 28psi, 750 holly draw through, and thats about it.
But i have now upgraded my pistons to some lighter 95mm toyota pistons and my rods to some H-beam forged ones. still to take it out with the new combo, but feels much smoother and responds much faster with the lighter parts. Also using my old 48mm dellorto side draught and lower boost, till i got it sorted out and need more power.
Cheers Hermann.
PS: my NA engine is much more expensive. it wes origenaly built by FAT, has a 914 case and heads, a scat 80mm forged crank, carillo special order rods, 104mm JE pistons, 48 x 40mm valves and a 290 deg cam with chev springs and a 48mm merged exhaust, induction is now 48 IDFs. ignition is also 2.1 waser boxer.

4agedub ·

Yes, I've got a shroud from IMPI. 🙂
Was this maybe your beetle?

type4turbo ·

yes, hahaha, that was me, having some fun with the turbo engine. (it had a bit of a missfire that day, as the cam had started to destroy it self and one lifter.
That IMPI shroud is a very nice system, is Armand still making them?
Has he ever explained to you, (or showed you) what goes into making that shroud?
Definitely not just an empty shroud.....
Cheers Hermann.

4agedub ·

I think Armand is still making them, he gave me one of his older design shrouds without the oil cooler take off. It's a piece of art inside, I'm sure it takes a couple of hours to make.

modnrod ·

This shroud sounds interesting, I like alternatives with a bit of lateral thinking.

Does this bloke have a website, or are do you blokes know of any info? I live about 300km north of you Hermann (if you're still in WH?), so if there are other ways of cooling these little things down in the heat you are no doubt aware of, then it's good to know about as a possible option.

Looking forward to the T4 build-up.

type4turbo ·

wow, 300km north of WH.... there is not much up there...hahaha😀
I'm living in Perth now. The impi cooling system works really well and looks almost like a 36hp shroud.
I don't know if anything will cool well in the heat that you have up there, but a type 4 has much more cooling fins, so it is possable to cool a type 4 with 100+ hp, much easier than a type 1 with the same power....
cheers, Hermann.

LIFE IN THE LOW LANE ·

Your n/a engine sounds very similar to mine. 104.7x86, 914 heads 48x40, 48idf's, webcam f86, 10.5:1 comp making 245 hp at the flywheel and 240 ft lbs torque.

type4turbo ·

Hi Brennden.
Your comp is a bit higher than mine and the webcam 86a, b and c is a bit wilder than mine, Do you know which of the 3 webcam grinds you have?
That and the extra stroke would be the reason why your engine makes about 45 hp more than mine.
Is your engine in a beetle? must be a real beast with all that torque. what is your rev limit, or at what rpm do you make your max power?
Cheers, Hermann.
Ps: sorry 4AGE, for hijacking your thread....

LIFE IN THE LOW LANE ·

Think it's an 86c. Engine is going into my 76 bus. It's a FAT performance engine that I am getting freighted from the states. Should be here early next year jan/feb. limiter is set at 6200rpm. Still waiting for all dyno sheets and specs to come as well.

Sorry for the hijack! Looking forward to seeing
Your bug finished!! Should be a weapon!!

Joel ·

12:1 and boost

That thing's gonna haul arse 😎

4agedub ·

The exhaust system is coming on slowly. Believe me it's real difficult to fit 48mm pipes past the pushrod tubes

4agedub ·

Some progress

4agedub ·

Two turbos mounted, and two charge coolers inside

Gracey ·

Looking good!!

Flintstones ·

Cool build thread🙂
Subscribed👍
Cheers
D

fish26 ·

man this thing is gonna sound sick and loose traction in every gear, so looking forward to seeing it run.

humpty ·

It's quite mad..... In a very good way.😀

4agedub ·

Some progress

4agedub ·

Some exhaust progress

tar76 ·

👍

modnrod ·

Hehehehe!
Cool.

4agedub ·

Some progress

4agedub ·

Turbos... what turbos... 🙂

4agedub ·

Air filters and injectors mounted

essex ·

Thats really neat stuff.

fish26 ·

Hey Louis, good progress on the project, can I ask what cam and heads you are using for the combination with the Deutz and have you thought about lowering the compression in order to increase boost. I think those cylinders can take at least 20psi.

I love the exhaust set up hope you don't mind if I pinch some ideas for the upcoming 2180 twin turbo engine I am putting together for a Manxter.

Once again, props for the work so far now hurry up and get this beast fired up.

4agedub ·

The heads are stock CU heads that were opened up for the Deutz barrels and then given a proper valve job. I would like to keep the compression high and rather run lower boost... the toyota turbos anyway dont like over 14psi.

I'm still inbetween two minds about running 2x waste gates or only one with a balance pipe... come on turbo experts give me a hand here??? 🙂

4agedub ·

Some more pics

typethreeking ·

I would run two wastegate a close to the turbo merge on the exhaust system, that will keep boost under control and stop boost spikes

modnrod ·

With those turbos on JZs they like combined boost and BOV control, just makes them smoother. But in this deal they are a fair way apart, here I'd probably run 2 as well. You could have both WG right on each turbo, but running a joiner exhaust pipe between them perhaps? It might help even WG control out maybe?
Dunno. ❓

4agedub ·

Right now there is no merge on the exhaust system.
Cyl 1 - 3 is joined to one turbo and Cyl 2 -4 is joined to the other. Like you would do on a dual scroll system.

So either I need to make a balance pipe between the two manifolds before the turbos or add 2x waste gates. My thoughs are that running the two banks seperate should help with spool up time, but I've never done a twin turbo system before.

modnrod ·

Seperate banks is how they work stock on the JZs, front 3 and back 3 feed their own turbo, so do VGxxTTs and RBxxTTs.

4agedub ·

thanks