Forums Forums Enthusiast Forums A - Z Autowirral More power from a diesel

Let me make myself clear about why a turbo is not an option:



Yes, that's ice, imagine that hitting a red hot turbo!

imho p1ssin in the wind as you cant have it both ways, although what about different ratio's for quicker response?

Carnt you throw a Red Top 2.0 16v lump in there ? No Turbo and 148 BHP

good idea batman then you could reroute the exhaust to come out near rear window.

encase all the electrics in a sealed box.

Lol, I know, we've tried everything! Btw it has a low ratio transfer case atm, i think the gearing is about 30:1 when 4L is selected lol. If you leave it in gear you could climb out and it'd climb walls without stalling

I'll mention the red-top as IMO it's a worthwhile option, he'll just lose a bit of torque

I think its well worth considering mate. Red Top on twin 40's with a snorkel feeding them

What torque does the diesel lump have ?

I am pretty sure the red top would have more, i remember being 5 up in a MK2 Astra GTE 16v (Red Top) and you could floor it from 55 mph in 5th gear and it would climb all the way to 148 mph very fast, no messing about like.

With the gearing you have i think it would still climb a brick wall on idle without stalling ?

With the limited options you have i think this one is the best by far mate.

Thing is, snorkel or no snorkel, going that deep in the water is gonna give you electrical problems with any petrol motor, as the water will get between the leads and plugs, in the dizzy cap and everywhere.

Turbos dont get as hot on diesel cars as they do on petrols and your hardly gonna be pushing high boost for long periods in that terrain.

TD I say - the new Discos / Range Rovers / anyother serious off road vehicle seem to get by without cracking turbine housings

A petrol motor in water that deep will cut out and leave you stranded

totally agree

I think we all agree a turbo is the best and I second what stuy says about diesel turbos not getting as hot as a petrol, another thing that will help is getting a water-cooled turbo, it wont help alot since the water is mainly for cooling down the turbo once not being used but its better than nothing.

Another thought noone has mentiond is a supercharger altho you would have to make a one-off as to my knowledge no one has done one (Aftermarket wise). The advantage with that is the power is evenly spread across the whole rev range so its instanly availible plus you dont have to worry about extreme temps cracking exhaust housings.
It can be done, and aslong as you know the go in you and arnt prepaird to face defeat you will do it. Granted not on £200 but I personally think this would be best, going off your brothers requirments.

Just had a thought, maybe a supercharger would be a better option



He's gonna look into it Dazza, cheers for the input and I agree, how come no-one thought of it sooner! It'd be a big project but **** me, if this plan works it'll be friggin awesome.

this means that the supercharger is going to be submergeed in water, superchargers still get hot.

what about a new 16v diesel out of an astra/vectra?

Superchargers are belt driven (Usally off the cambelt, that iv seen thats aftermarket) so will get no-where near as hot as a turbo but with all the benefits to reap.

I'll dig out useful bits of a convo I once had with a turkish guy thats S/C his zetec, its quite impressive. He knows what parts etc to use so ill see what I can find jim

Right, am still getting my info off my friend (Hes from Slovenia not turkey). The BMW Mini supercharger is a common S/C to use, altho my friend Ernest Pančur has used a roots type of blower, Eaton M62. This blower creates preasure at idle (unlike some) so requires a bypass valve, it can also be easily mod'd since most S/C reqiure mounting to the inlet manifold - With a flange and custom piping this is avoided. It comes off a mercedes, and along with the S/C you'll need the obvious such as higher rated injectors, intercooler, CR decrease, ideally an enlarged throttlebody and a custom way of making it all happen!

Keep in contact as i'll get more info if you need it mate, he also has a few pics of his progress so far

Allot of work by the sounds of it ? Lower compressions, fueling, bypass valves and acuators....

How you goinf to fuel accordingly ? Bigger injectors wont do it, you will get far too much fuel at idle.

Jim, Have you looked into Water Injection