Comments on: New Mercedes-Benz OM651 twin turbodiesel

By: Leon

Leon — Wed, 03 Jun 2009 17:26:07 +0000

dis engine does not have a leak off line at the injector, but why do they have the timing at the rear of the engine

By: superturbocompound

superturbocompound — Mon, 22 Sep 2008 13:20:47 +0000

in kk,already tried in a vigo and land cruser 1hz.(4,2 litre diesel).beutiful set up,never ending power,(15psi).on a vigo,not fully utilise due to chip parameters,(not enough fuel)DP chip cannot supply enough fuel.(setting at no.9),land cruiser good power enough fuel,howver inlet charge too hot so charge cooler currently being fabricated.i have a rexton rx290,this will have the set up some time this year.doing alot of research in fueling,finnish people manged to squeeze out 295bhp on a korando,

http://www.ssangyongclub.co.uk/forum/index.php?showtopic=152&hl=diesel%20tuning&st=40

this turbo set up is the same on the bmw,opel,saab.peogeot has a slightly different setup(similar to petrol type),Q,,can this be done to all 2.5 turbo diesel sold in malysia? CAN.fuelling is the only issue for common rail type but on mechanical type fuel pump there is hugh potential.my curent project is a supercharged turbocharged isuzu.you can read about it here.

http://clubisuzu.proboards29.com/index.cgi?board=Enginemods&action=display&thread=1020

By: jamsbong

jamsbong — Tue, 15 Apr 2008 13:56:55 +0000

This is one expensive engine! with complex turbo boost control and torque control. What impresses me is that Mercs didn’t try to save money on it. Instead, it comes with full on balancer shafts and forge pistons.

I bet if you can free up the computer limit of this engine. It can probably do another 550Nm or 600Nm of torque. Enough to wreck your gearbox or smoke lots of tyres.

By: fighter_B2500

fighter_B2500 — Sun, 13 Apr 2008 04:33:52 +0000

awsome!! think what it can do if that diesel engine put in pick-up truck like ranger, hilux, triton …sure can beat normal passanger car at traffic light!

By: osh_kosh

osh_kosh — Fri, 11 Apr 2008 11:49:26 +0000

Myvikiller,

u should read carefully… even Paul admit he has make the mistake.. & corrected it

By: MaverickNeo

MaverickNeo — Fri, 11 Apr 2008 06:52:40 +0000

High pressure turbo spooling Low Rev
Low pressure turbo spooling High Rev (Bypass valve to avoid overload and ceases at medium revs)

I think that’s what Paul is saying.

By: ynnad

ynnad — Fri, 11 Apr 2008 06:38:52 +0000

wah… when will this GEM find it’s way into a ssangyong?

By: MyviKiller

MyviKiller — Fri, 11 Apr 2008 05:38:34 +0000

MyBoy said,
April 11, 2008 @ 12:58 pm

Is it just me or the above paragraph indeed doesnâ€™t sounds right. One contradict each other.
—————————————————————-

Naaah Paul’s description is quite clear my boy.

By: brutus

brutus — Fri, 11 Apr 2008 05:27:39 +0000

mouthwatering! 500Nm from a 2134cc engine! impressive!!!

By: MyBoy

MyBoy — Fri, 11 Apr 2008 04:58:03 +0000

Paul,

“The twin turbochargers are installed in a sequential manner, with one HIGH PRESSURE small turbocharger spooling up quickly for LOW REVs and the OTHER low pressure large turbocharger taking care of the higher engine speeds. The LOW PRESSURE turbo has a bypass duct to prevent it from being overloaded, and it ceases work from MEDIUM engine speeds onwards.”

Is it just me or the above paragraph indeed doesn’t sounds right. One contradict each other.

Paul Tan says: yeah you’re right, its the high pressure low rev turbo that stops work from medium revs onwards, corrected already

By: pirate

pirate — Fri, 11 Apr 2008 04:34:13 +0000

Very concised and informative report. Well done Paul!
Well done M-B as well

Pity the diesel quality (or rather the lack of) that we have here in Bolehland