FWIW, I'm fairly hand with the tools and making up stuff myself. Some stuff I need to farm out, but I've got friends that can help with that too
, laser cutting, machining and such like.
Welding and spanners don't scare me though
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| Author: | two_OH_five [ Wed Dec 26, 2012 4:36 pm ] |
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I don't think the GT35 will be a great match unless you are looking to build a 1/4 mile car |
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| Author: | Dave Dorson [ Wed Dec 26, 2012 11:35 pm ] |
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two_OH_five wrote: I don't think the GT35 will be a great match unless you are looking to build a 1/4 mile car
Hi Thanks for the feedback. Can I ask, is that based on the turbine trim and compressor trim details or the the fact it's a GT35 (which in reality only means the flange type). |
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| Author: | two_OH_five [ Thu Dec 27, 2012 12:12 am ] |
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The series defines a bit more than the flange type It also describes wheel sizes - the GT35 series uses pretty big wheels. 35 series are more appropriate to 3l sized engines According to turbobygarrett the one you have doesn't exist so it is a little bit hard to be certain if it will work or not. It is possible that what you have is a custom hybrid of parts which might work but without any kind of compressor maps it is very difficult to be certain. However it is going to be a lot of effort to fit it only to find that (as I guess) it won't spool to 4500rpm plus. There have been a few cars running high horsepower with a gt35 series. A feature of them has been the ability to make a cuppa while waiting for the boost to arrive. I might be wrong but seem to recall Adrian was using a bit of gas to spool a gt35 on the Runx at one point |
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| Author: | TrackToyFour [ Thu Dec 27, 2012 12:14 am ] |
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GT35 turbos converted to GTX35 spec with a billet compressor wheel spool from about 3,500rpm so an improvement in driveability over the GT35. Whether this would be OK for road use I'm not sure. |
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| Author: | Sunny [ Thu Dec 27, 2012 12:32 am ] |
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Hi, a billet compressor wheel do not give you a spool up advantage, it is just stronger.....? greetz |
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| Author: | TrackToyFour [ Thu Dec 27, 2012 12:38 am ] |
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Sunny wrote: a billet compressor wheel do not give you a spool up advantage, it is just stronger.....? The earlier spool is reported from both Owen Developments (WRC, F2 and BTCC turbo suppliers) and Adrian at Fensport. I would speculate that due to the stronger nature of the billet material this allows some weight to be removed from the wheel this improving the spool.
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| Author: | Dave Dorson [ Thu Dec 27, 2012 1:26 am ] |
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First of all, apologies for the confusion I've caused. after doing some cross reference with the Perkins part number, the turbo is actually a GT3271 With the exhaust housing 435066-32, so 0.69 AR housing on the turbine size. According to Garrett, it's for 2.0 to 3.0 cars, between 200 and 400bhp. |
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| Author: | Jon9985 [ Thu Dec 27, 2012 9:46 am ] |
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What are your goals horsepower wise? A td04 turbo is good for spool up and power up to about 300hp. |
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| Author: | Dave Dorson [ Thu Dec 27, 2012 10:22 am ] |
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Jon9985 wrote: What are your goals horsepower wise?
A td04 turbo is good for spool up and power up to about 300hp. I'm happy around the 300-325bhp mark. Crucially though, I have this turbo on the shelf. If I didn't, I'd be sending the CT20b off to get rebuilt and hybridised to suit. |
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| Author: | Sirius [ Thu Dec 27, 2012 1:14 pm ] |
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I think it would be well worth costing out what it's going to cost to fit the turbo you have in terms of having manifolds machined, down pipes fabricated and fluid lines made up. You might find the total cost isn't that different from getting a CT20b rebuilt. |
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| Author: | Sunny [ Thu Dec 27, 2012 2:22 pm ] |
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Hi, TrackToyFour wrote: Sunny wrote: a billet compressor wheel do not give you a spool up advantage, it is just stronger.....? The earlier spool is reported from both Owen Developments (WRC, F2 and BTCC turbo suppliers) and Adrian at Fensport. I would speculate that due to the stronger nature of the billet material this allows some weight to be removed from the wheel this improving the spool.aluminium is pretty light weight, i think you have to remove a lot of material to get the weight significant down.....do this compressor wheels possible have a different design? greetz |
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| Author: | two_OH_five [ Thu Dec 27, 2012 6:24 pm ] |
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Earlier spool will I imagine come down to a more efficient compressor design Dave that turbo is a bit of a odd duck. Using my ballpark estimator (10lb/min = 100hp) it's in the right ballpark according to the Garrett site. But to echo Sirius' thoughts you might still be better to just stick with the stock setup - also of note is the lack of water cooling If you are handy on the tools and fancy a fabrication project it might pan out. If you have to pay someone the known quantity CT20 is probably safer |
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| Author: | Dave Dorson [ Thu Dec 27, 2012 7:53 pm ] |
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I think TD have said that to build a turbo the way I'd really want it, will be £350 +vat. Now.. that was before I discovered the turbine had shattered and exited, probably damaging the rear housing. So that'll need machining out, a steel Supra shaft, cleaning, assembling, balancing and new seals. I reckon I'll be well south of £700 by the time I'm done. To make the Garrett fit. Custom Fab in the US will sell me a flange for £37.00, +£18.00 import and delivery charge. Pirtek will make up my oil lines.. what's that?, £100.00 max? A genuine garret rebuild kit will be around £80.00 and rebuilding a journal turbo I've done a fair few times without problems, the key is to mark everything before you remove it and refit it all carefully. Exhaust wise, 6 bolt flange to vband, and then cut and weld a vband into my dp, provided I can make the lambda probe fit (easy enough), I still doubt I'll be near my £700. Obviously, I want what's best for the car, but the way I see it, if this turbo allows more scope for tune, the money I'd spend on the turbo could then be spent on cooling and tuning improvement. |
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| Author: | Dave Dorson [ Thu Dec 27, 2012 7:59 pm ] |
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FWIW, I'm fairly hand with the tools and making up stuff myself. Some stuff I need to farm out, but I've got friends that can help with that too , laser cutting, machining and such like.
Welding and spanners don't scare me though
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| Author: | TrackToyFour [ Thu Dec 27, 2012 10:01 pm ] |
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Could be an interesting project Dave although the end result may be less than obvious at this stage. If you wanted a guaranteed end result then there are the obvious options in terms of Toyota hybrid specs, S148 etc. If, as you say, you have the skills, tools and contacts then I'd encourage you to go for it with the Garrett, nothing ventured, nothing gained! |
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