Outer Limits 4x4 Board

my carby motors getting old and cant be stuffed rebuilding it and being left with the same old thing.

i like the sound of a holden v8 at the right price and the extra torque at low rpm is something i'd really like lots. but is the power delivery very similar between the two tb42 motors? i know theres hardly any power increase.

diesels another option but i've been spending quite a bit recently on doing a home made efi setup on the carby motor so have fuel pumps and surge tanks ready to go and theres alot more dicking round with converting to diesel (well thats a personal opinion from the looks of things).

The cost of any V8 transplant is gonna be $5k+ but more likely up near $10k with engineering and all.

You should be able to pick up a good GQ TB42 for $500 and a rebiold might be $1000.


Diesel V8 maybe?

Heh...its funny ive been wondering about the same thing. My ol carby TB42 is getting a bit tired and have considering rebuilding and trying to put together a copy of the EFI kit that Bru21 made. In his comments he says that the power delivery is *much* better, more responsive etc etc.

Im not really sure, but i think the standard torque from a Holden 304, isnt 'that' much different from the TB42(at low revs), just another 40 KW's of power when things get going.

Heres the specs ive got.

TB42
125kw @ 4200
323NM @ 2800

Holden 304 std
165kw @ 4400
385nm @ 3600

These specs have made me wonder if spending the $7000 on a 304 engine conversion is worth it. Dont get me wrong, i would lurrrrrrv the sound, but id really like something a little more for the money

Would be really interesting to see a real life dyno chart side by side of these stock engines, and see what the torque is at 1500rpm etc.

yeah my efi setup is a copy of the one bru21 did. after spending the money on it all (which ended up close to 1000 bucks) i later saw on this very site an injected tb42 with computer for like 1500 and i was like !!!! but that happens sometimes.

its not bad but its not exactly what i was hoping for, pings a bit too easily for my liking under not really heaps of load.

How much do you normaly have to spend to do a diesel conversion?

Draven,
what holden engine are you talking about? efi or carb?

i'd say that'd be efi....

Yea its the 304 (5ltr) EFI V8 from a VN - VT....Althought they did increase in power in the later models....

i have had 2 patrols with 5ltr conversions and i wouldnt waste time again (conversion cost me nothing but time) the torque from the 5ltr is crap and you need to always be reving it to get anywhere and to stop it stalling over obstacles. and they only put 100kw to the wheels . a sorted out carby motor can do the same . the better option is a factory efi manifold & injectors and a aftermarket ecu . costs less than the 5ltr conversion and more torque and more power .

304 withe stroker kit should get the heart pumping. Around 200rwkw withe mid cam should make some luvely noise

If anyones interested , my factory efi is still for sale. Its still in the car at the moment but is coming off at x mas. PM me for details , shane....

ok cool thanks krminl thats the kinda opinion i was looking for.

Ok, just as a matter of conversation, ill add this.


What about fuel econ ? Ive been told that the economy gets boosted by upto 25% when the 304 coversion is done. (So 15l/100km, instead of 20l/100km)

Is this true ? And would anyone know of a way to bring the TB42 in line with that sort of economy assuming the above mentioned mods... because my feeling would be that increasing the power output of a TB42 is going to push the economy waaaaay in the other direction. eg 30l / 100km. Which is just gona kill a daily driver.

yeah ive been keen to find that out too, im like just about to do the 5ltr conversion but the only thing thats holding me back is the economy.
I'd be looking at putting the vs 5ltr in, i got a mate who had the same engine in the commodore, he reckons he was getting between 500 - 600kms per 65ltrs, so say 11 - 13ltr/100km. Commodore is a lighter car with around 30% over drive, im not sure what the patrol/mav has, prob around half. I'd be guessing around 15-16ltr/100kms, depending on tyre size.
If anyone out there has some figures, share them around please...

well yeah that was another reason for my thinking, i'd like something that would be better on fuel than the tb42 which aint that hard.

diesels dont use much fuel......

ive been keen on a diesel shorty for awhile, i just cant seem to find a decent one for a decent price. Thats why ive been looking into the 8.

I think you will be surpirsed how much fuel a Diesel can burn when they start producing decent horse power.