Goodge123 5 Posted October 13, 2016 Report Share Posted October 13, 2016 Currently planning on a turbo build for my 2.8 12v. Don't want mental power to have to start upgrading internals to much . Found a few holset hx40 16cm turbos .Anybody have any experience with these ? Would the boost come in to late ?Ash Link to post Share on other sites
RBPE 198 Posted October 13, 2016 Report Share Posted October 13, 2016 Awesome turbo's, sorting out some supplies for them. Not used that one myself but know a few owners who love the 35/40's, some 12v owners. 16cm is probably about 0.95ar or so, you using a modified hybrid turbine or stock twin scroll? Get your fuelling big enough and check the wg spring isn't some 30psi+ one if you're not ready for it! Diesel turbo's don't forget so high psi. As an idea of spool on these 700hp turbo's; Link to post Share on other sites
RBPE 198 Posted October 13, 2016 Report Share Posted October 13, 2016 (edited) Actually, think it's from here (noticed name change - same thread I think); Edited October 14, 2016 by RBPE Link to post Share on other sites
Goodge123 5 Posted October 13, 2016 Author Report Share Posted October 13, 2016 As far as I aware it's a standard twin scroll 16cm h1c/hx40. Would be ok for low boost for 400bhp ?? Link to post Share on other sites
RBPE 198 Posted October 14, 2016 Report Share Posted October 14, 2016 (edited) They can handle low boost or high - good all rounder for these engines, if you see figures for like, 350hp/400hp max, then that's probably a reference to the fact that they are designed for diesels and their lower power figures, on petrol, a H1C can do about 640hp, HX40 can do 700hp. There can be a wide range of housings for the turbine side though which can affect spool. Compressor map; Edited October 14, 2016 by RBPE ibs and VR6CABBS 2 Link to post Share on other sites
RBPE 198 Posted October 14, 2016 Report Share Posted October 14, 2016 Most VR owners I have dealt with use the HY or HX35 turbo's, the 40's might be a bit big for just 400hp. Link to post Share on other sites
Goodge123 5 Posted October 14, 2016 Author Report Share Posted October 14, 2016 The turbo I have been offered is a h1c 16cm Link to post Share on other sites
Goodge123 5 Posted October 14, 2016 Author Report Share Posted October 14, 2016 Or possibly a hx35 16cm Link to post Share on other sites
RBPE 198 Posted October 15, 2016 Report Share Posted October 15, 2016 (edited) It's generally assumed that; 17cm - 1a/r So to work out others; 16cm - (16/17) - 0.94ar 14cm - 0.82ar and so on So, the 16cm would be like a 0.95ar Garrett for example, so more aimed at higher boost/hp set ups really on the 6 pots, probably still boost mid 3000's at lower boost. Other things to think about too - are you going to use a proper twin scroll tubular manifold to slave the gasses, that would obviously help spool, or if you're running low boost or talking about low air/blade speeds, is the turbulent air from the divide going to be something of a hindrance? Does it balance out or is negligible with the twin-scroll housing etc? There are some with 14cm and some with T3 GT30 esque turbine sides which may be more appropriate, but if you're thinking of upping the boost at a later date then they're all good for 500+hp and it depends on what you can live with/where you want power. So to answer your original question...... quite a large housing for your goals, somewhere 3500-4k rpm at a guess, maybe be a lot better depending how you sort the exhaust mani/slaving of the gases - any are good really, H1/HX35 seem similar, both using same turbine sides so probably hard to tell difference, probably great on a 20psi 500hp set up, HX40 if you're aiming for 550-600hp+ would be good on the 16cm housing. Edited October 18, 2016 by RBPE vr6nay 1 Link to post Share on other sites
Goodge123 5 Posted October 16, 2016 Author Report Share Posted October 16, 2016 I do plan to up the boost one day as I plan to 4wd it. I don't want to get a large turbo for the future and have to deal with a very laggy engine . I'll see if I can find a hx35 with maybe a 12cm or 14cm turbine . When I'm after more power I'll then go for something like the hx40 Link to post Share on other sites
RBPE 198 Posted October 16, 2016 Report Share Posted October 16, 2016 Compressor racing's only got the 16cm in at the mo, make sure whichever you buy is a proper one if you can, stickers look like this on them; http://www.ebay.co.uk/itm/NEW-Holset-HX35-600bhp-water-cooled-twin-scroll-T3-turbo-Not-Garrett-GT35-S300-/262658384111?hash=item3d27a8e0ef:g:HtwAAOSwvzRXzDbq This has a 12 on it? Ad looks a bit hmm though! http://www.ebay.co.uk/itm/New-Holset-Turbocharger-Hx35w-/152273948210?hash=item23743c0e32:g:czAAAOSw8w1X-5Ml MMMM Billet! http://www.ebay.co.uk/itm/1998-2002-DODGE-RAM-5-9-24V-CUMMINS-DIESEL-HOLSET-TURBO-HX35W-PN-3590104-/131970849706?hash=item1eba135baa:g:ZJ8AAOSwYIxX2dud I think there's some big commercial turbo sellers that you can put part numbers into but finding out turbine side info's usually the pain! Link to post Share on other sites
Goodge123 5 Posted October 16, 2016 Author Report Share Posted October 16, 2016 I'll keep my eyes peeled for a hx35 12cm. One will pop up soon I'm sure. Link to post Share on other sites
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