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Old 20th December 2014, 05:56 PM   #1 (permalink)
RB26DETTpowered is unaware they can edit their status
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Converting the RB26DETT to a single turbo

Of course, you see many people do this for horsepower purposes since the two turbos come tiny in the RB26DETT. What'd be the best turbo to convert to ?
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Old 20th December 2014, 06:32 PM   #2 (permalink)
R32 Combat is in limbo
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Ah, yes, well.
You can get just as much power with twins as you can a single. The shorter inlet manifold for twins favours response.
Can you read a compressor map?
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Old 21st December 2014, 09:34 PM   #3 (permalink)
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@R32 Combat

No, I can not. Of course, going with big twin turbos compared to a big single turbo, you'll have better top end power with the twins, but that's pretty pricy. Which is why I think quite a few people just convert it to a single turbo since they're better for top end power then what the stock twin turbos do.
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Old 21st December 2014, 09:38 PM   #4 (permalink)
R32 Combat is in limbo
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After reading your post a number of times, you appear to be contradicting youself?
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Old 21st December 2014, 09:58 PM   #5 (permalink)
anthonymcgrath is probably succumbing to gravity... lemme check.. yep.. still there funnily enough
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Depends on what you wanna do really..

My initial plan s for my 32gtr were to run top mount. Got a gt3582r at good price but would need manifold wgate and downpipe all sorting out. A fair outlay of cash for what still ends up a custom job.

Drop some decent hi power twins in and yer away.. running on oem manifolds etc. Course things like injectors and clutch need sorting plus remap for either option. Just depends what you want to fiddle with really. Sound of a big tub spooling up is epic tho. Still miss that sound
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Old 5th January 2015, 08:23 PM   #6 (permalink)
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Twins for response . Big single for drag.

I used HX40 with 19cm turbine housing. Ported compressor inlet etc on a bmw 2 valve m20 b27 low cr once.... spooled hard @ 3.8k made 388bhp @ 1bar but was awful to drive on the road

My mate Alex used t25 twin setup on his 325i , E30's both BTW ,made 350ish hp and was stunning to drive with wide powerband.

Having sampled both. Twins ftw .

Mapping is the key whatever route you choose.
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Old 5th January 2015, 08:49 PM   #7 (permalink)
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I have gone to a single and would never go back to twins.

I've got more response and more HP than I would get from low mounts, a much cleaner and easier to work on engine bay, no overheating issues with the rear turbo, much better piping flow than the tightly packed twins, no surge issues.....the list goes on.

The old "twins for response and single for drag" no longer applies with the range of singles available now.
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Old 5th January 2015, 09:54 PM   #8 (permalink)
gtr mart is fast and loud
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A GT30 sized turbo for 500hp would be superb. GT35 size turbo for 600bhp also awesome.

I am a fan of decluttering and simplifying where appropriate
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