New turbo garrett GT 25/30r turbo setup

[twin eng, twin turbs]

I machined up the exhaust flange for the outlet of the turbo, two ports will be used one for the turbine and the other for the wastegate. Ill manufacture a plate to go in between them both to seal. The turbine downpipe will expand quickly form 2 1/4" diameter out to 3" as is the rest of the exhaust and the wastegate pipe will be 1 1/2" exiting straight down below the engine! screamer pipe!!!

[twin eng, twin turbs]

Some more progress today, i manufactured number one cylinders piping to the turbo.

This is where it starts getting a bit tricky making manifolds, i am going to make each cylinders piping the same equal tuned length 4 into 1 with a rotary collector at the turbine inlet. A rotary collector utilises the firing order of the engine 1,3,4,2. With this design the exhaust gas spins around in the collector drawing the gas out of the next cylinders pipe. Good 4 into 1 extractors are designed this way.

Number one cylinder is obviously the furthest away from the turbo in this setup and each runner following will match its length. This pipe has 8 seam welds each one is "V" prepped, welded and internally ported out so no airflow obstruction is present.

[twin eng, twin turbs]

This threads awsomeness levels are already through the roof imo.

Just curious, whats the technical term when the turbo is mounted like that?

and where the hell are the rest of the cars you have writen in your sig?

Thanks Spyda, i will start a thread for the scirocco build up and their are allready pics of the twin engine mk1 in my gallery.

[Jarred]

pretty cool building manifolds.

i'd love to have the skills!s

[twin eng, twin turbs]

pretty cool building manifolds.

i'd love to have the skills!s

Thanks Jarred, theirs no reason why you cant build these things yourself, You did a great job spraying your mk1. The tooling is the expensive part really. I paid $5500 for a great ac/dc TIG welder and its the best for all welding jobs car wise.

[Preen59]

Looking good Marty. Might have to drop round and check things out when you're not busy.


You should come round to the workshop and check out some REAL horsepower too some time....

[Jarred]

Thanks Jarred, theirs no reason why you cant build these things yourself, You did a great job spraying your mk1. The tooling is the expensive part really. I paid $5500 for a great ac/dc TIG welder and its the best for all welding jobs car wise.

hahah

both my cars put together are hardly worth 5500! hahaha

Actually building some extractors is on my list of things to do! granted, it's not a short list though...:s

[twin eng, twin turbs]

Looking good Marty. Might have to drop round and check things out when you're not busy.


You should come round to the workshop and check out some REAL horsepower too some time....

Yeah drop round anytime Chris, just message me. REAL horsepower huh im guessing the dragstarrr is running is it?

[twin eng, twin turbs]

Im half way on the manifold now, number 3 cylinders exhaust runner is done and ill start on number 4 today. Number 2 cylinders runner has to go under 3 and 4 so im doing it last so i can get the correct clearance required. Its great having the room behind the engine now to design a great flowing setup, it was really cramped before.

[twin eng, twin turbs]

I completed number four cylinders exhaust runner the sarvo, heres some pics. I bolted the manifold to an old 1600 head to keep it relatively straight, though it will be machined to ensure its surface is flat once fully welded.

[twin eng, twin turbs]

I finished the exhaust runners on the manifold today and the managed to get them equal in length along the centreline of each one within a couple of millimetres. Shame the manifold cannot even be seen once assembled hidden under the inlet manifold and pipe work..

[Spyda]

Looks good man.

Have you thought about one of them US (ABA?) cross flow heads? I understand you would have better flow, cooler intake and you could show off the pipe work aswell...

[Jarred]

looks good Marty.

[Preen59]

I've seen better...


Nah looks the goods dude. I'll have to drop round when we're both free and have a look.

[twin eng, twin turbs]

Looks good man.

Have you thought about one of them US (ABA?) cross flow heads? I understand you would have better flow, cooler intake and you could show off the pipe work aswell...

Thanks Spyda, your right the cross flow head would out flow the original head unmodified, but i have sunk far to much time and money into the headwork on this head to change it now.