Outer Limits 4x4 Board

I lost hours of my life reading about those crazie finn's and the merc's Im seriously thinking bout variable geometery turboing a td42 and running a aftermarket computer to electronically controll wastegates , boost compensator , Turbo, ETC , and also have fuel cut- EGT compensation ,and also to co...

You could build your own two stage control for the compensator with a air toggle switch and needle valve to vent pressure - less fuel and switch it the other way and have full pressure / full fuel , all could be set on bench to adjust compensator to suite.simple air lines and air toggle switch not ...

Given that most outfits now use an EGT sensor, it wouldnt be hard to have it activate a relay once a certain EGT has been met - there are digital EGT gauges that have a programmable output (ie to drive a buzzer or light). I dont think you need to even go to that extent....relays are readily availabl...

Ultimately an electronically controlled injection pump will give you all these options and more. But first, is such a pump easily sourced and second, can it be sealed up well enough for these conditions? Not an option for this truck AKAIK, even the "electronic" TD42 pumps are really limit...

Keep in mind these high power merc motors are all about high rpm. Jeemu is reaching peak torque at 5,200rpm and peak power at 6,000rpm (I have his 530hp chart which is three weeks old). It's not a tune that would work well in a 4wd. They're also running basically at stoich (15:1) which I think will...

You are a lucky man to have all that info with its accuracy. Should make future work a walk in the park. Andy Andy as you well know,many many hours go into designing and building these pump/turbo combos and if info is available that can get you close to start with then it saves a lot of spanner tim...

Honestly, there are heaps of threads and searching in Google for what I mentioned will give you the results. But anyway...... http://www.superturbodiesel.com/std/om605-dyno-t-899.html" onclick="window.open(this.href);return false; (now in new thread that hasnt been updated in last week) ht...

If I was looking at maximizing power on a TD42 (I am not, I am actually going to mod my 1HDFTE for towing a caravan), I would take a good hard look through the huge amount of information regarding the turbo Mercs. They are ALL IDI, Look at OM617, OM605 and OM606. The latter can make crank 750hp (~60...

It is all usefull information. Maybe I should ammend my formulae for drivetrain/traction and other losses to be a little less aggressive. Since the fueling seems close enough I should also adjust the BSFC calculation to be a little less optimistic. The trouble is, it cant be everything to every one....

Maybe I should ammend that to +/- 2% accuracy ;-)

223rwkw @ 3000rpm 269.7kw @ flywheel 858.4nm @ flywheel 16:1 AF Ratio (could be 17:1 due to headwork, which is clean) 157cc/1000 strokes BSFC: 267.2gms/kwh ~ 44lb/min Air @ 33psi Please note: as for use of significant figures for the power/torque, the accuracy does not warrant the use of 4….however ...

Sure, just give me the rpm, the HP/KW @ wheels (and corrected @ flywheel if you have it for reference) and I'll be right back at you.

Hi sswaffie, sorry if it came accross that I didnt think your pump put out what you said, didn't mean it that way. I was more interested in what fuel it could deliver in the higher rpms because 226rwkw, while huge, should be achievable on a TD42 with 180cc from 2500rpm and if fuel doesnt drop off, s...

Just trying to get my head around these figures? Did it make 110mm3/1000st @ given rwkw(1650Rpm) OR did the pump produce 110mm3/1000st @ 1000 pump RPM and made 151rwkw @3300Rpm (engine) Not knowing what pump produces @ Rated HP ? We race a Td42t with 223rwkw @30psi of boost myself and my navigator ...

It might be worth noting that the engine rebuild is not a result of the engine blowing up - in case anyone was wondering....., It some time back suffered from injestion of what I would call a "significant" amount of very muddy water that left gravel "post" turbo - this was ALL on...

Hmm very interesting reading , How good would it be for a ve pump to produce + 200mm3/1000 st @ say 2000 Pump rpm! What is your fuel setting @ peak Hp , i understand you say 140cc/1000 st @ 1000 pump rpm but what at rated speed? We are seeing a substansial amount more from our pumps @ 1000 pump rpm...

Interesting reading. Want to forward work out what 250 cc of fuel will give in a td42t from 2000-4000rpm for me. Remember dyno's are measuring torque, power is a output from it. Andy How much boost do you plan on running for the given 250cc,50 will be a minimum i would suspect from what we already ...

Interesting reading. Want to forward work out what 250 cc of fuel will give in a td42t from 2000-4000rpm for me. Remember dyno's are measuring torque, power is a output from it. Andy How much boost do you plan on running for the given 250cc,50 will be a minimum i would suspect from what we already ...

My assumption is that the dyno determines that all the power is being made (due to a time/rpm intergral - kiwibacon, care to comment?) That is how I understand it. Did you manage to get any BSFC figures for a stock TD42T? I back calculated ~250 g/kwh for a 1HD-T and ~300 g/kwh (both at max torque) ...

KB, I assumed you used the factory manual for pump setups and worked back - I know we discussed similar things for the 12HT way back when. At that time the marine diesel also was around the 260gms/kwh mark IIRC. I was quitedissapointed at what appeared to be lousy economy.... Having said all that, e...

Hi, I would like to add to this discussion if I may. The figures for the vehicle in question were recorded by myself. They are accurate and at the wheels. It should be mentioned that the dyno day wasn't about being a horsepower hero - we were tuning the engine/turbo for best response and wide power ...

For those interested, when I took all the measurements of the 12HT block when preparing for my build, at that time my brother who is a diesel mechanic commented on the apparant block thickness, or at least the thickness around the cylinders. As a result, it looked like a 95mm piston might fit. I did...

Hi Dougal, Wow, did some big posts and they dissappeared. I am not sure how long they take to load up. Anyway, to answer again, I am not sure if vnt or not. I am excited to find out but at the same time not sure what I prefer since I hav no idea about the governence of the VNT and feedback to ecu etc.

Hopefully in 2 weeks I will have something for you.

Hi All, well as it is with most projects that people with families and jobs have, delays delays delays.... Since I don't own the HJ61, I havent been responsible for the work done on it after the rebuild. In any case, the owner, a friend of mine, has installed a water to air intercooler, 3" stra...

Hi Flyology, I am looking to do the same thing in mine because the auto died. Simple fix for the auto (just need to change the clutches ($400) but I have all the bits to swap over (spare 86 HJ61 manual). Just would like to know how much messing around you had to do.... A number of hours would be great

We are aiming for 150-180 @ wheels. Worked till midnight last night, looking preddy. Need to torque up Head/BE/Mains, fit numerous accessories. As for crank strength = no idea. They dont look too strong really, after looking at a 1HDT. So what were the circumstances around these broken cranks? But 1...

the build will be completed in the next two weeks and the turbo installed will be a high flowed CT26....I sold it to a Mate and he wants to go conservative. Will have some interesting times though over the next month with TD42. Already made 201hp @ rear wheels..... hopefully now 250-300hp! Many secr...

Running, extra fuel, more than 15psi in my 12H-T with CT26 turbo, clipped turbine, no other mods. 2nd gear of auto gives 133hp @ wheels as measured yesterday. The clipped turbine was meant to be with many other mods and is not something I would reccomend as a turbo upgrade with no other mods or in f...

If you have a head off and are local, I can bring over a valve spring compressor......