Did anyones 2H extractors make much of a difference?

[AussieHJCruza]

At 621,000k's if it smells a turbo it will s**t itself?

I would say at 621,000k's that would be your 19.5L/100 problem, do a full rebuild or do it the cheap way, take the rocker cover off and bolt it on a 2H that has done 250,000k's

I think you must be thinking of the OP, mine's got a shade over 300,000 k's and is nice and healthy, although it burns a tiny bit of oil. It will just draw away from an 80 series heading south on the southern expressway.
I'd be interested to know what sort of fuel consumption he gets though, I wonder if the PO has done a dodgy with the odometer on mine. It wouldn't be the first illegal modification he'd done to it...

 

[watrob]

I was referring to "new45" first post that he stated his 2H had done 661,000k's, think that's where is problem lies? if he starts playing with motor.

But I got your fuel economy muddled up from the other post>

 

[new45]

There is no problem with my 2H, just looking for a little more.

This is the project truck and not the daily driver, but before I took it of the road it was getting 13L/100km, and it has excellent compression, and drives like my other HJ47 (thats fairly fresh of a rebuild).

I trust it to do another 200,000 without worry. I just want some more performance.

People get all worried about kilometers! Its more about vehicle history, keeping to a solid service schedual is worth > half a million ks!

 

[watrob]

Hi all,

I have a HJ47 with a 2H which is starting to get on in years and kms (621,000k's) and I dont want to risk a turbo but I wouldnt mind a little more power.

I can get a cheap set of extractors and I was wondering if its worth a shot?

Any other exhaust mods that will help (already a 2.5' system)

Thanks for any advice.

New45, a 2H with 621,000k's is a lot, and 13L/100km is good, you can on fresh 2H's get 9L/100km if you don't push them to hard. The only thing that worries me is when you make changes to older engine is when things start to go wrong. The 2H is known to crack heads and adding extractors may give you 5-10hp and let it breath a little better, but it might make you drive it harder also thus causing problems sooner rather than later?

At 621,000k's I would be treating it with kit gloves rather than trying to extract more power out of it. The 2H is only around 100hp anyway and yours is probably sitting in the 80's, and full rebuild with extractors will give all the power you are looking for?

 

[sodafeld1]

I put pacemaker extractors on at 180000kms. Love it, maybe a bit more power but not much, but the 2h shall never be a rocket without turbo, even with turbo most cars shall blow you off. I don't want to turbo as I want the engine to last as long as possible. Not many engines last 35 years+ with 6-800000kms.
The design of extractors makes much sense and 2.5 inch pipes help her breath out better.
It sounds ace!
The 2nd 2h engine I am rebuilding is including the noordeman performance camshaft, they reckon 30% more power which must be a joke, but I shall give it a punt. The lobes are ground down besides the peaks where they close the valves, it looks like the valves open a tad longer. Shall see if much difference.

 

[AussieHJCruza]

I'd be very interested to know what sort of difference noordeman camshaft makes @sodafeld1

 

[sodafeld1]

yeah I was hoping someone here tried it, I believe there is something on facebook about it, but i don't facebook, if anyone sees anything solid about it on facebook please report back here. Noordeman take the standard chinese camshaft from nason (most of their parts are chinese, I believe), grind the lobes then re-heat treat them for an extra $300 aud.
Both the engine builder and diesel specialist I talked too reckon it is bs.
Gonna take me while to get all the rust out of the troopy wreck tho..I pity the panel beaters as a fulltimer!.