Holset Turbo.. would this work on an m20?

[dan_emaps]

Guys, saw this beast on ebay..

http://cgi.ebay.co.uk/HOLSET-TURBO-TO-F ... dZViewItem

I've noticed these turbo's are respected by alot of people here, but also read that diesel turbos are not suitable on petrol engines?

Would this turbo work on an m20?

Thanks!

[gcorky]

yes its a h1c like ive got ,check on turbine housing size....ask seller to look for 12 or 16 etc cast on it...

[dan_emaps]

Ahh right, it looks fecking huge surely theres gonna be some hardcore lag lol, yours all done now then dude?

[gcorky]

nope im not running yet ,but this turbo is widely used in usa on the m20...its bombproof...not too laggy from other peoples input...t3 flange-split entry etc...

[gcorky]

heres one next to a turbotechnics t3(2wd saph)

[dan_emaps]

lmao! oh yes is it a t4 flange? looks bigger compared to the t3.. could be my eyes lol

[blingsta]

HMMMM, that turbo technics 1 looks really nice !!!! and familiar..

[gcorky]

its t3 ,yes bling m8 that would look familiar to you

[Turbo-Brown]

So how many of us are gunning for this Holset then?

Sure I've heard people saying they don't boost until as much as 4000rpm!

I'm really keen to make another TT system only this time using something like that Holset and something like a T25 too so as to generate axle snapping torque off idle and still get a decent top end.

Seems that standard late bottom ends are good for over 350bhp at the wheels so the cost should be concentrated only on the exhaust and induction systems

[fuzzy]

Have heard people saying they don't boost until as much as 4000rpm!

4000rpm?by the time your turbo kicks in whatever you were racing will be long gone

[Ant]

as the only person currently online with actual experience of a holset'd M20 let me tell you this:

Boosted to 1-2 psi on no load @ idle( revving it )

8 psi @ 2.8K, loads more above

if its a 16 or 18 cm/2 buy it !!!!!!

[Turbo-Brown]

fair enough, need to tell my arse to stop talking

[Ant]

to answer Dan's Q on the derv turbo on petrol, the sheer size and robustness of the holset commercial series means you can get away with the higher gasoline EGT , but a smaller derv tubby would be borderline @ best.

Just to add, by common consent the "sweet spot" on the H1C in 80mm+ compressors starts @ 1 Bar, lower CR is a must have, my HX35W comp map is sweet from 17-36psi , lots of headroom there

[gcorky]

to answer Dan's Q on the derv turbo on petrol, the sheer size and robustness of the holset commercial series means you can get away with the higher gasoline EGT , but a smaller derv tubby would be borderline @ best.

Just to add, by common consent the "sweet spot" on the H1C in 80mm+ compressors starts @ 1 Bar, lower CR is a must have, my HX35W comp map is sweet from 17-36psi , lots of headroom there

lower cr?so are you running decomp plate or something?thought stock facelift was ready to roll on its native ratio?

[dan_emaps]

Ah i see, so maybe not the best idea if the max i'm intending to run is a bar then Ant?

Turbo-brown - Just got my manifold yesterday so have no £Â£Ã‚£ so i'm out on this one.. trust me i wouldn't have stuck the link up if i could afford it lmao

Hoping another one will come up when i have money.. don't seem to appear that often though.

[Turbo-Brown]

fair enough, be interesting to see what it goes for. Gotta be worth a punt if no one else is desperately wanting it

[WillG]

honda boys abuse these turbos with anti lag, they are solid, nice turbo, wont get much lag, people have used much bigger turbos and spooled before 4k

[cplagz]

It's a T4 split-pulse turbine entry, not T3.

I have a H1C, ~50mm inducer, with the 18cm2 exhaust housing going on a eta block, 885 head with forged slugs (8.0:1 CR) will let you know in a few months how it goes once its running

[gcorky]

[quote="cplagz"]It's a T4 split-pulse turbine entry, not T3.

I have a H1C, ~50mm inducer, with the 18cm2 exhaust housing going on a eta block, 885 head with forged slugs (8.0:1 CR) will let you know in a few months how it goes once its running [/quote


ive had dozens of these -got a spanker here right now,sold one to another zoner.....defo t3 footprint.



obviously you are doubtful......t4 is more square looking than the rectangular looking t3........

[WillG]

i can tell from photo and looking at these flanges alor befor on trucks , one in pic is 100% a T3 flange

[gcorky]

bit of wisdom from Ixer


The H1C or HX35 are great turbos for most stock 'i' engines that aren't looking for insane power that would require lower compression than 'i' stock 8.8:1. Like say 400+ crank hp would require an HX40 and engine bottom-end modifications.

They both usually have a T3 divided entry, couple that with a manifold adapter and separate Tial 38 mm wastegate and it would be enough for a 1-1.5 bar setup. We're talking safe 300 whp with aftermarket ECU (fuel + ignition).
3.5" downpipe and 3" exhaust with a single muffler out the back and you're set on the exhaust side.

[dan_emaps]

3.5" downpipe wheres the room lol!

Ahhh ok so shouldnt be any problems with running a bar on standard compression then?

[gcorky]

Ixer is a mod on e30tech....use=lhd....lucky buggers

[WillG]

i dont think ypu need a 3.5" exhaust to make 300 hp like hes saying tho, 1 bar on stock compression is possible but your on the limit of wha t the stock gasket with non stretch can take, might be safer to get a MLS or orings with welded channels, with orings and welded head with ARP bolts on the internals people have run close to 2bar std compression

[e30_Turbo]

My H1C is a T3 flange 18cm3 housing too, 82mm compressor in it also, so plenty of power to use up as yet.

The one on ebay is identical to mine.....it's sounds fecking awesome on boost!

You need atleast 3 inch exhaust, the difference it made was massive on mine.

There is NO WAY you can use a 3.5 inch downpipe, not poss without chopping out some bulkhead or running it directly out through the wing

I got round this by having a 45mm external screamer pipe and that equates to over 5inchs of total exhaust area! Pretty sure that'll do for my needs, bloody injectors will max out way before that does.

Either way that bad boy needs to breath!!

HTH, Mark

[WillG]

no problems on the MOT with a screamer mark?

[Turbo-Brown]

Shouldn't do anything at idle I wouldn't have thought.

[e30_Turbo]

no problems on the MOT with a screamer mark?

Not at all, as Alex said, they only test the exhaust as idle, saying that I did go and see the MOT man before I dropped mine in, took a few attempts to explain what I meant but they had no problems at all.

MOT man even added they would have to test drive it afterwards tho

[dan_emaps]

i dont think ypu need a 3.5" exhaust to make 300 hp like hes saying tho, 1 bar on stock compression is possible but your on the limit of wha t the stock gasket with non stretch can take, might be safer to get a MLS or orings with welded channels, with orings and welded head with ARP bolts on the internals people have run close to 2bar std compression

Oh right, i'm planning on running 12.9 bolts on the standard h/g.. but mines a 320 so i have a bit more to my h/g.. a bar shouldnt be a problem i'm hoping... so hopefully this holset would work ok for me, no huge exhuasts here though 2.5" downpipe to a 3" system i reckon.

[Turbo-Brown]

Take it the bolts being uprated inside are the main bearings?

[dan_emaps]

Just for those of you who can afford to buy it unlike me lol! this turbo is still cheap guys 3 hours to go...

[Turbo-Brown]

Anyone ever find out how big the housing is?

[gcorky]

i would say the 18,as its the common one on the 6bt....as in commercials -looks like hes in the game...

[bigkev]

why do these bloody things always pop up when cash is short

i wonder if the missus will mind if i cancel the holiday

[Turbo-Brown]

So how much power are they good for?