Thats how my evening went, PMSL

Me and my mate Biscuit decided to give the 3 door a bit of a going over to get the engine bay tidy again as its started to get a bit grubby, then because im planning on building a new engine this winter for it anyway, it might be fun to send it out in a blaze of glory.
This a YB I built from random bits of a couple of dead ones with the intention of it seeing me through last summer (2006) for a few months if it held together with the abuse I give it, and then when it died I would build a new one a bit more properly when I had the time, but depsite a 32psi+ boost spike and as much boost held as the T34.48 could cope with the bastard thing just hadnt given up the ghost, its smoked a bit on over run, its rattled a little on startup, but its just kept going and going, and its started to feel like the old smoker was never going to die.
So we nitroused it to hurry it along msl:
Then we cranked the boost up as far as it would go with the extra exhaust gas from the nitrous kit (was holding nearly 2 bar for most of the rev range, LOL)

Feck me was it going well, I guess it was probably making about 500lbft of torque and over 450 bhp, as it was on 120bhp jets and should have been about 350/350 ish anyway without the gas.

Absolutely monstered round to 170mph a few times (guestimate based on rpm getting to the limiter in 5th and I think thats about what its geared for)

Sadly though, on the last run up an off road track that looks somewhat like the M5, it just decided it had enough, it started to splutter a bit, I kept my foot in anyway to see if it would pull through, and that was it, nothing more after that.

Coasted about a mile or so to the service station with the clutch dipped, and rolled up to within 10ft of a petrol pump where it finally ran out of puff, I checked I had fuel and a spark, no problems there, but from how fast it was turning over, it seems to have lost compression. So a mate of mine came and fetched me back in his works recovery lorry.

Going to either yank the head off or pull the engine tomorrow I expect to see whats going on, but given that its so blatantly lost compression its either pistons melted or head gasket blown I guess, Im thinking head gasket as there wasnt the plume of oily smoke I would expect from the exhaust if it was pistons melted.

Fair play to the old girl though, she did me proud for the last 18 months or so, and I have to say that a reasonable shot of progressive nitrous on a stage 3 cossie engine is PERFECT for the road, the difference in lag is massive, felt more like driving an N/A car from that point of view, and the extra torque through the rev range was very noticeable in terms of acceleration.
In fact on some reasonabley grippy yokos, it was braking traction on a good condition dry bit of tarmac in 2nd as soon as the gas came on hard just through sheer torque.

Quite impressed the T5 gearbox took the punishment all evening.



Couple of quick shots from biscuits phone of the bay as we tidied it up and chucked the nitrous kit off my nova into it:

 

do you have any mates called chocolate? that would be great

chocolate chip biscuit

sorry

cant believe the car took so much of a hammering and didnt break up until now any more pics of the car

 

FPMSL
Sounds like you had quite alot of fun chip

 

Your mad

At least you had fun

Steve.

 

Down in flames

 

 

Joking aside, i would have thought the engine would happily take that. Gasket ok - there is some serious compression pressure and i guess your not on anything fancy, but i'd be dissapointed if a piston let go, and AFR was ok...

 

LOL, no mate, i'll see if I can get to know some afro caribean strippers, im sure one of them will have a name along those lines,

For pictures just click the garage thing under my name

 

Yeah I reckon its the gasket.

It was already starting to go a bit before, Ive drained the water a couple of times to get rid of a small amount of oil containation on previous occasions.

 

and you was only saying two days ago that you couldnt get the beast to break

 

Time will tell if I actually have now or not, as I dont really view a headgasket as very broke if its all that is up with it, its not much more than a service item, lol

 

literally LMAO!!!!!!!!

 

Cool as Had to go one day, no bother really

If it was 500lbft itd be destroying the tyres in more than just 2nd in the dry with 215/225 tyres, surely.

 

Sounds fun.


do you set the AFR the same from full load with the shot of Nos?


i was thinking that too.

 

3rd is geared about 50% more than 2nd, so give than a reasonable condition saph/3door will happily take more than 300lbft in 2nd, there is no reason at all that 500lbft should break traction in 3rd unless there is something up with your tyres etc, especially given that the 3 door has more grip in 3rd than second due the whaletail starting to work.
Also because it is dialled in progressively it starts weight transfer backwards before it gets to peak torque, its not like a full bore gear change with a massive turbo where you get hit with the whole lot when you change gear, I had the controller set to reset on every gearchange to dial it in smoothly again.

 

I would love Nos, but just can't justify Ł50 a refill

 

OMFG - ITS ALIVE!!!

Plugs look very black, but all the same.

Compression tested it and got just under 9 bar on all 4 cylinders, so definately no major compression loss anywhere like I had suspected.


Whacked a set of cheapy autofactor plugs in it today and it fired up.

So it was just the plugs had got coated up with soot as I neared the end of the bottle and the pressure dropped, thus making it go much richer.

This old cossie engine I built from scrap bits just will NOT fucking give in, LOL

 

time for round two?

 

go on chip, what an engine, you may have one which just does not want to break




200 shot next

 

i cant belive its alive after that lol

 

great thread

 

Chip, you mad coont

Love it

 

I wouldn't bother trying to build another engine, you wont get one as reliable as the one you have now lol

Steve.

 

class!

look forward to round 2.

 

haha quality

 

Right, latest update.

When the plugs coked up, the spark obviously managed to break free as it couldnt get across the plug with all that nitrous in there making things difficult on top of the extra sufrace resistance of the plugs, so consequently its burnt out a couple of my HT leads, so now when I bring it back on boost, there is a path for it to escape from already made, its ok upto about 22psi, but anything over that and its arc'ing out, and obviously the gas is a no go at the moment for the same reason.

Its leads 1 and 3 that are doing it, ive tried to insulate them to stop it, but its still not having any of it, so I will order up a set of new 909's or magencores for it and have another crack next weekend.

Might have to bite the bullet and swap to coilpack here to get a reliable spark, but will see how I get on with new leads on it for now as its easier and im not really interested in putting too much effort into something that I just want to die anyway

Scrapheap challenge YB -1
Chip (even with the cheating gas) - 0


On the plus side, my 150 bhp jets turned up this morning (rated at the wheels, so potentially good for about 175bhp), so that should put the ball back in my court with trying to kill this fucking thing

Sadly though, the weak ignition system is my achiles heal in this battle at the moment as I can only put in as much gas as that will let me.

Ive already pikey-motorsported the rotor arm with a load of solder and some copper pipe though, so thats at least something going my way.

 

Fair play chip for trying

 

haha chip my god how good did it go when it was running ok tho were gonna have to make it better next weekend then turn the gas on again lol

 

Sounds good, hopefully it will last long enough till your RST is back on the road then we can get the kit on that and do some more destruction testing

 

sounds like fun to me. kill the lil rst lol

 

Good on ya chip..

 

i could bring my leads tomorrow. lol

they will be connected 2 car tho so no u can't use them

 

LOL @ Len, thought that was a genuine offer at first

 

when ru gonna c20let the cossie then chip lol

 

LOL

Nah, im loving this old YB too much now, think im finally starting to see the appeal in them at last, tough old girls that they are

 

lol me2 its gonna be bye bye cvh hello yb

 

You finally seen the light and going to make plans for getting a saph later on then?

Good man, if we both have one, there are odds that at least occasionally one of them will be in correct working order

 

yea sph here we come lol yea i bet but none of them will be in the same calibre as evosteveos car tho haha

 

Better go out whit a bang