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RB26 pre turbo extractors !!

amosite

By amosite,
in Group Buys

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amosite Proficient

amosite

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Quote From manufacturers ad

I have spoken to a manufacturer who will be releasing their RB26 Manifolds shortly and with RRP set at $1299 is it definitely a viable and cheaper option compared to HKS headers.

General description:

Complete stainless steel (3mm thick!), mandrel bent and equal length headers/turbo extractors. Minimum gain we have seen is 12% (At the wheels) on a dead stock R32 GTR. These are a complete bolt on for all RB26 Engines and also have fittings for the factory heat shield.

Firstly these headers are brand new and construction is from mandrel bent stainless steel. Other popular brands have mild steel flanges that have been "chromed" (or Painted) giving it the stainless look but not the associated benefits. The difference in flanges is the stainless steel will aid in gasket life and reliability with pipes and flanges expanding at the same rate. I know I personally don't want to be changing gaskets in 6 to 12months time, this is an evident property of mild steel flanges mixed with SS pipes as they expand and contract at different rates, which eventually causes them to warp! Ours are constructed of the same grade Stainless steel so they won't do this- ever!

Mandrel bent pipe work in 3mm stainless and direct bolt on for all RB26 engines. We have also included a provision for the factory heat shield to keep under bonnet temp down. In addition, these can also be heat wrapped or HPC coated for further improvements

Included are:

-Headers (For 1 engine)

-Manifold to head gaskets

-Turbo Gasket

Bends and welds are kept to a minimum to improve exhaust velocity and pipe length is made as even as possible (equal length). With these fitted you will see a power increase from around 1800 RPM all the way to 8000 RPM (not all Rb26's rev to 8,000) providing a broad power range. This makes every day driving a lot more enjoyable especially for those of you who are running aftermarket turbo's. The car is really that much better to drive! With a stock turbo, the power/torque drop off above 6500 isn't as bad and boost comes on a little earlier providing stronger mid range torque that hits like a bomb. The top end power increase is due to 2 reasons. Firstly; boost doesn't drop off like the factory manifold does. Secondly; the efficiency and flow is improved at high rpm driving- this was optimized for people using turbo upgrades such as garrett and HKS turbo's. In Addition the collector flange has been closer match ported. If you have a look at the factory manifolds you will notice a fairly large step where the manifold mates to the turbo's. We have changed this to a smooth entry. Perfect for street/track cars.

In addition to this they also have a sound change which is inevitable with the velocity increase in the exhaust. The exhaust does sound tougher (higher pitched roar) with these fitted. Expect around 27 hp (at the wheels) on a stock RB26. Bigger gains have been seen with more modifications/better quality parts fitted but due to so many variables, the gains have been from 37 rwhp (about 20%) to a whopping 69 rw hp on a severely restricted car (This car had all the bolt on goodies and ended up making just over 500 hp (at all 4 wheels). This makes for a cost effective power increase!

This doesn't just add top end power but increases overall power and power under the graph making your car overall quicker in a variety of situations including out of corners, partial throttle, up steep hills etc. Its easy to make something that improves power, but improving power over the entire useable RPM range and partial throttle is not so easy. Not only this, we have seen full boost reached 400 rpm earlier on a stock car and nearly 950 RPM on a more modified car. This makes a massive difference to the fun factor especially on the street and accelerating out of the corners. Unfortunately the dyno graph doesn't show partial throttle improvements in response, drivability and off boost torque. We will post dyno graphs shortly. This will fit your stock turbo or another bolt on.

Group buy price for 10 $849 + Shipping $30 nation wide via courier

If it hits 15 or more I need to update this with a specific price.

Group buy closes 26/6/05 and firm payments are needed before this date and your name is put down.

They will be delivered approx 18 working days after that!

There is no pick up available and all items are shipped via courier

They are not available for any other skyline!

I will try and answer any of your questions, however feel free to email [email protected] if you have any questions I can not answer

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https://www.sau.com.au/forums/topic/74935-rb26-pre-turbo-extractors/
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amosite Proficient

amosite

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Yes!

But they were for the 1st generation.

These have been revised since then.

-Heavily polished

-pipe work is redesigned for better flow

-Machined and polished flanges

-better quality welds

-modifed JIG for easier fitment

-Additional bracing

Edit: Was just told about more details

BigMicky Proficient

BigMicky

Posted
Posted

The pics look very much like the ones I saw a few weeks back but the workmanship does look very good.

amosite... have you actually seen one of these and had a close up look.

do you know where these are made?

I'd like a set without the posts for the heat shields.

And yes very interested unless I pick up a set before hand

amosite Proficient

amosite

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Yes, I have seen these in person!

I have also seen them in comparison to the 1st gen and some of the cheap chinese shit going around! You get what you pay for in the latter.

These are made in the land of the rising sun!

Im definitly in on this batch.

I asked him about the posts and they are for heat sheilds. I wasnt too keen on running them after fitting them but it is vital otherwise the intercooler pipes suffer heat soak as they sit just above the manifolds.

BigMicky Proficient

BigMicky

Posted
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I asked him about the posts and they are for heat sheilds. I wasnt too keen on running them after fitting them but it is vital otherwise the intercooler pipes suffer heat soak as they sit just above the manifolds.

I still want them without the posts!!!

Can they get them this way?

They should even be cheaper !!!!!(6 less welds)

amosite Proficient

amosite

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what diameter is the pipe on these manifolds? can they be done in a larger diameter pipe

They are 42mm each. You wouldn want them any bigger as they start to induce lag and are only really a benifit if your going to be running more then 950 hp and 12,000 rpm.

Who makes these? What grade stainless? Have they been flow tested, and if so, what were the results?

Cheers,

Lucien.

[email protected] makes them

304 Stainless

They havent been flow tested. I believe that flow bench data has very little to do with performance on exhaust manifolds. Dyno and on road testing is more useful as exhaust heat has a major impact on outright flow.

BOOSTD Mentor

BOOSTD

Posted
Posted

I bought a pair from Roguepi off ebay, One had large loose dags inside which broke off easily. All surfaces had to be faced as they were massively warped($160) and I paid him for overnight delivery which took almost 2 weeks...and he is also in sydney. Quality is quite good on first inspection but looking deep inside there are(were the 3 pipes meet near the turbo flange) large lumpy flow reducing welds. They are quite cheap but still required alot of work to bring up to scratch. The Turbo flange is also a larger size to stock turbos and HKS 2530's etc which require's maching of the exhuat housing to match. Look at the pic's and then at your turbine inlet see what i mean. Oh and the heat shield bolts don't come close to lining up. All I can say is physically check before you buy.

  • 2 weeks later...
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