new Head???

[Gr4H4m]

I have seen a 12G295 for sale that has been re-con'd. Can I use it with my 998 or would I need to complete some engine mods.

I have heard bits and pieces about C/R and needing cut a chunk off, them cracking very easy. needing to add studs to the block. But I don't know what is balls and what isn't.

I don't want to get into major block work or changing cams etc but do like the idea of a bit more go, with my stage one kit.
Also with it being a 295 its still original... What do you all think am I going down an unreliability road or serious fun factor.:confused:

P.S its from a mini engine builder so the recon should be ok.

Thanks guys.

[Deano]

trouble is mate when you upgrade something the next bit down the line needs doing aswell like pistons conrods crank drop gears gearbox diff drive shafts brakes the list goes on a 997 & 998 head will go on but 1275 head needs the block pocketing to allow ther valves to open:)

[Gr4H4m]

trouble is mate when you upgrade something the next bit down the line needs doing aswell like pistons conrods crank drop gears gearbox diff drive shafts brakes the list goes on a 997 & 998 head will go on but 1275 head needs the block pocketing to allow ther valves to open:)


mmm not a good idea then? I dont want a pocket rocket just a bit nippy?

[supadupacupa]

It will go on no problems if it is the 295 casting. If it has not had a skim to decrease the chamber volume then it will need doing so. On a standard 295 I thinks its 8o thou off. It could have been skimed already and the only way to check the cc volume is measure it with a pipette or the like. You need to have the same or slightly less chamber volume than you have already. Standard 295's have a chamber volume of 28.3 cc. Not sure what your standard head is.

The cracking you here of is on 940 heads and generally it is only the bigger valve one (ie 1805 castings) of the Mk1 and Mk2's. when fitting one of theses with anything other tahn a standard cam, you generally need to pockect the block for valve clearance.

The engine if in good condition, will handle the increase. Your probably looking at a jump of 7-8 bhp. More if you have the stage one kit fitted.

[@lex]

mmm not a good idea then? I dont want a pocket rocket just a bit nippy?

hey you aint getting your hands on my nippy :)

cheers

[Gr4H4m]

hey you aint getting your hands on my nippy :)

cheers

:D :D :D lol

[Gr4H4m]

It will go on no problems if it is the 295 casting. If it has not had a skim to decrease the chamber volume then it will need doing so. On a standard 295 I thinks its 8o thou off. It could have been skimed already and the only way to check the cc volume is measure it with a pipette or the like. You need to have the same or slightly less chamber volume than you have already. Standard 295's have a chamber volume of 28.3 cc. Not sure what your standard head is.

The cracking you here of is on 940 heads and generally it is only the bigger valve one (ie 1805 castings) of the Mk1 and Mk2's. when fitting one of theses with anything other tahn a standard cam, you generally need to pockect the block for valve clearance.

The engine if in good condition, will handle the increase. Your probably looking at a jump of 7-8 bhp. More if you have the stage one kit fitted.


cool I think have just found my Xmas present.... I will check the block on Sunday to see what type of pistons are in it. I think they should be dished, that should enable the company to skim the head to the correct size.

[Gr4H4m]

one other thing can I use my exisiting rockers. I know the 1.3 lift will give a bit more power but wondered if I could use the existing.

P.S anyone got an old complete knackered head I can use for the exchange if I go with the idea....:confused:

[Deano]

yep i think ive got one mate:)

[Gr4H4m]

yep i think ive got one mate:)


Cool dean what do you want for it?

[Gr4H4m]

well I have gone mad and ordered the 12G295...... which will be re-built and then sent to me....:o
This one was listed on the website not needing an exchange. I have convinced the wife its a good idea due to the fact it will be lead free....... and I would have had to get one at sometime. + I have paid the same price as a leadfree replacement....

The down side is that it looks like I wont have the car for the xmas do..........I might strip the head off ready I will need to sort a torque wrench and get a new set of studs+ nuts.

So I have blown my xmas present.

[Deano]

Good stuff mate will be a beast in no time :)

[Gr4H4m]

Good stuff mate will be a beast in no time :)

A beast is a bit much but it should be nippy..... and stay with the traffic..:D

[Gr4H4m]

Well whilst I have the exhaust and carbs off I have whipped of the old head ready for my recon'd 12g295 form Morspeed

Came off quite easy I used the two nut trick to take the studs out then gave it a bash with a wooden hammer, and off she popped....

The head gasket looked distorted form the middle cylinders it was egg shaped I'm not sure if this is normal? I did have some work done on the car years ago so maybe the didn't torque the head down in the correct order?

The studs need changing so I will get a set from Minispares and the couple of gaskets I need. I should have thought and done a web guide for the forum... I might be able to do something when I fit the new head? :o

Still here a pic of the bare engine.... looks like the bulk head needs a bit more painting....

[supadupacupa]

Good stuff, looks like you have the standard dished piston (cooper's had a raised D top). Whilst morespeed are sorting the last bits, get them to measure it up and skim it to raise the CR if poss. They would have done it loads of time before. They will probablly be facing it up anyway so get it done at source.

As for the gasket, when you say egg shaped do you mean the wring around the piston or do you mean the gasket had lifted. On the subject of gaskets, go for a good quality copper one. No need to go daft money and try and use some A+ head nuts. Much better.

I'd look for a CR of 10:1 max. That way you wont get pre-det and you dont have to run fancy fuel to stop it from Pinking.

I can see you getting addicted......new SW 5 cam, Lightened flywheel.....ooohh the list is endless.

Oh and yes running standard rockers would be fine. I think they come up at 1.25 -27 anyway. The 1.3 ares ways to get you to spend your money. The standard S ones are this ratio, so keep a look out for them but at this state of tune, you'd stuggle to see a difference apart from your pocket!!

[Gr4H4m]

thanks mate Thats what I was thinking about the Rockers. As with a lot of tuning parts most of the time its a reputation rather than benefits, (Same goes for the 2" exhaust).

The bug has stopped at the head. The cam is a bit too much work for me, what with the fitting and timing.:o

I spoke to Morspeed they said the same about the rocker gear, and they are going to skim it so I have the correct C/R... They so far have seem a good bunch.

The head gasket had the egg shape around the metal rings?? I will get a pic later.

I can't wait to get it back to I can finally get it all back together. :D :cool:

[Gr4H4m]

The head gasket rings are all egg shaped so I presume they are all like it.

[Gr4H4m]

ooo should have the head next week, so I can get it back together..... cant wait.

I need to get a bit of painting done on the bulk head whilst I can get to it. I'm going to paint the manifold whilst I'm there. :D :D

[supadupacupa]

If you can, use some thremal exhaust wrap (Not to keep it warm on the winter!!)

It will help keep the heat in it and keep cooler air for the intake. It all helps.

[Gr4H4m]

I did put some on but knacker'd it trying to get the manifold on the car. Those freeflows are a tight fit:mad:

[Gr4H4m]

ooo look what I got today....

[charlie_mini]

ooo! looks like santa came early to you!! :D

[Gr4H4m]

Yep... Spent 5 hours today putting the car back together.....

So I have the head on, tappets adjusted, Exhaust manifold on, twins on, made an exhaust bracket, repainted the head because Morspeeds, BMC piant is not the same as mine....

I need to fit the exhaust, but the link pipe and the pipe on the back box are the same size so I need to get some pipe to sleeve it, going to speak to CES tomorrow.

I also need to sort the accelerator cable and fit the air filters... Then off to the Rolling road for some serious setup...

[Deano]

Fantastic any piccy`s?:)

[Gr4H4m]

No I will have to sort some... I was waiting until the air filters were on.;)

But the exhaust might stump me if I can't get any pipe to sleeve the stuff I've got?? I would need to get some serious kit to flare the end so I could fit one pipe into the other....

[Deano]

If need be get the next size pipe up or down and we could cut the other pipe off and weld a new pipe on. Then one clamp and its on :)

[Gr4H4m]

If need be get the next size pipe up or down and we could cut the other pipe off and weld a new pipe on. Then one clamp and its on :)

cool thanks Dean... a factory finish :D will contact CES and see what they have.