The good old days ?

doubt that remind me again how many tonnes does a delorean weigh

1.28 tonnes, tiger. 120kg more than an atmo. Effectively taller gearing though cos of bigger back tyres. Also a 2.8 odd-fire, same gearbox ratios.

The particular car in question has received some serious engine work and I was on the rollers experimenting with a mappable control pressure regulator (K-Jetronic, Darling, you wouldn't understand )

(K-Jetronic, Darling, you wouldn't understand )

Maybe not 'fully' but I have a couple, and a manual too

doubt that remind me again how many tonnes does a delorean weigh

1.28 tonnes, tiger. 120kg more than an atmo. Effectively taller gearing though cos of bigger back tyres. Also a 2.8 odd-fire, same gearbox ratios.

The particular car in question has received some serious engine work and I was on the rollers experimenting with a mappable control pressure regulator (K-Jetronic, Darling, you wouldn't understand )

Your right petal what i.dont understand is why you only got 206 bhp out of a nigh on 3ltr motor with fuel injection and extensive mods.

I plan on putting a standard laguna/safrane lump in with standard injection remapped renix ecu, good headers and exhaust no cat obviously and see around 200bhp with no extensive mods. What i dont understand Petal is with extensive mods what happened to the third litres power output

I know i.ll find it difficult to understand but do try and explain petal


Si21 i prefer to walk the walk and no thats not the reason i walk funny

shut-up blossom

http://en.wikipedia.org/wiki/Flower_power

shut-up blossom

Listen here Roland how many times di have yo tell you not to call me bossom

going quite well this ' back in the day talking b ollocks thread ' I think

Your right petal what i.dont understand is why you only got 206 bhp out of a nigh on 3ltr motor with fuel injection and extensive mods.

Er, wot like the 24v lumps which produce that with 126cc more, twice as many valves and a very complicated intake manifold and exhaust?

Given the DeLorean market, people want an engine that looks stock and doesn't return a ghastly fuel economy. This limits the mods to compression ratio, head work, exhaust and cams. Even fuelling and ignition is basically tied to the original design (not now in the case of fuelling).

We're also not talking outright power, in fact the owner who brought me this car was fed up with the way it drove - great on a track, shite in traffic. I'm proud of the result which was a much smoother response and actually gained at top end. I ony wish the rollers didn't experience a "moment" which meant we got little in the way of absolute results, only comparing one run with the next. Still, we got the afternoon for nowt...

Your right petal what i.dont understand is why you only got 206 bhp out of a nigh on 3ltr motor with fuel injection and extensive mods.

Er, wot like the 24v lumps which produce that with 126cc more, twice as many valves and a very complicated intake manifold and exhaust?

Given the DeLorean market, people want an engine that looks stock and doesn't return a ghastly fuel economy. This limits the mods to compression ratio, head work, exhaust and cams. Even fuelling and ignition is basically tied to the original design (not now in the case of fuelling).

We're also not talking outright power, in fact the owner who brought me this car was fed up with the way it drove - great on a track, shite in traffic. I'm proud of the result which was a much smoother response and actually gained at top end. I ony wish the rollers didn't experience a "moment" which meant we got little in the way of absolute results, only comparing one run with the next. Still, we got the afternoon for nowt...

So not really extensive mods then, more modest mods slightly bigger inlets and exhaust and a mild cam a bit like the standard even fire 3ltr laguna or safrane lump. I know of a couple of 24 vslve lumps that put out 240 bhp standard,engine only with all the restrictions induction, exhaust and ecu removed. It therefore does not seem unreasonable that the 3ltr 12 valve cant make,200 bhp with all the external restrictions including the cat removed

Sure the 24 valve makes 200 brake in a standard road car, but i thought we are talking about modified applications. Many manufacturers produce multivalve engines but dont extract the maximum horse power for the intended application. The Ford zetec 1.8 only produces 115bhp in the Focus but the older equivalent Clio valver of the same capacity ran 137bhp.

I dont think to compare your,modified engine aginst a,standard 24 valve in a standard compromised road car is any kind of comparison as the engine is not being utilised to maximum even in standard form. I.think its fair to say that the 12 valve lump is equally strangled so i dont think that it would be unreasonable to expect around 200 bhp for an engine of this capacity.

Your disciption of extensively modified didnt really paint a representative picture of what your mods were trying to acheive to me extensive means pushing the limits

I hsve been advised that this coversion has been carried out several times in France with the result being 210 bhp

I hope this is correct otherwise ill be really peeved to have done all that work for an extra 12bhp.

Ill stand corrected if anyone can prove and give me a reasonable explanation why not,......preferably before i waste my time doing the conversion. That said i am really wanting to supercharge the engine as apposed to turbocharging....well one day when i am solvent again.

Si21

Your disciption of extensively modified didnt really paint a representative picture of what your mods were trying to acheive to me extensive means pushing the limits

Okay fair comment. But there is a law of diminishing returns here too.

Come back and let us know when you've actually done it Si ....then we'll be all ears

Come back and let us know when you've actually done it Si ....then we'll be all ears

I have been advised that this coversion has been carried out several times in France with the result being 210 bhp

I hope this is correct otherwise ill be really peeved to have done all that work for an extra 12bhp.

Ill stand corrected if anyone can prove and give me a reasonable explanation why not,......preferably before i waste my time doing the conversion. That said i am really wanting to supercharge the engine as apposed to turbocharging....well one day when i am solvent again.
Si21

I am not one for bull shite power figures either, in fact I dont care whether an engine produces 150 bhp or 450bhp on the rollers just as long as it performs on the road. Rollers figures are only a guide and only useful when figures are compared on the same rolling road.

Whilst I may not understand and never claim to understand the very technical details or most importantly pretend to understand between my father and myself, mainly my father (he is fully qualified old school engineer, now retired); we have built several unsuccessful modified road engines.

I wish I knew a fraction of what he has forgotten about engineering, engine buiilding (motorbike race engines) over the years

But you know what, I am learning and doing stuff for myself on limited funds. Trust me If I did not have limited funds at the moment I would not even be considering messing around with bolt on mods to a standard engine, prior to owning Renaults all of my cars had been powered by home built modified engines. Probaly the best engine was not an outright power engine but a high torque 2 litre for my Opal Manta 1.8 s all comp raito's pistons calulated and pistons machined by my father not an engine builder or machine shop down the road, yes that home brewed

I have now done a clutch change subframe and engine in and out twice virtually on my own, well the 2nd time anyway. So now that I have that under my belt and can do it in a weekend, the next job is a new engine rebuild as the atmo is lacking in a certain department , I am sure my father will only be too happy to advise me and set me straight.

So when time and funds allow you had better get your ears out ,unfortunately the Atmo has taken rather more time and money than I hoped or could really afford at the time, having stretched the build of my Le Mans replica to over £22,000 grand way beyond the budget expected, but once you've started you have to finish it dont you . Like I said my mistake was to take on another project which also got started and also ran way over budget by about £5,500 so far so the money I needed to finish the Le Mans; well I guess you'll all have guessed where thats gone Thats why the Le Mans has not been fiished as some that have seen it may agree, I am trying to do a nice job so I will not bodge it on the cheap to spoil the overall effect. I still have those black leather seats you sold me many moons ago Clee, once they have been re-covered and trimmed I'll be only too happy to refit them.

So you think I'm full of Sh*te Clee that's fine

Maybe I'll be wrong but I cant be impossible to get reasonably decent power outof a PRV as far as I know I think 340bhp has been acheived from an "extensively, seriously, modified" odd fire normally aspirated lump; not here of course, but in France.

But it looks like you have the time and funds to do the 3ltr EFI before me Clee, so I know you will be looking forward to selling the conversion so we'll see if you with far greater experience and knowledge than myself will come up with. Like I said If it can be done and someone can advise me of a more realistic power figure before I waste my time and limited funds I am all ears, yeh I know and nothing inbetween

I certainly think another 30bhp should availble over over the oddfire fitted to the atmo GTA with those fantastic Solexexexe'sisis. I have been advised that just the exhaust headers and system are worth upto 15 bhp on the 3ltr lump I'll stand corrected If someone knows better

So come on anyone since I am so full of mire, someone please advise what realistic bhp at fly figure should I expect?

Mr Faulks do you have an opinion on this

Kindest regards

Si full O sh*te 21

That's the spirit

:lol:

That's the spirit

And your valid opinion

about what