je pistons
Turbo Mini Forums

I bought some +0.020 18cc JE pistons from minispeed and have just fitted two of them to the block. When i ordered them, they didnt tell me anything about fitting them, neither does it on the website. first off, you have to get the rods bushed because the pins are smaller. Now I have them fitted, they stop 1/4" short of the deck. Im pissing furious they never told me anything of this, just that theyll go in. now i either get longer rods and bush them, or get new rods and new pistons. rant over

Edited by Leonard on 30th Mar, 2006.

Do you mean 1/4 of inch down the bore at deck i think you need S rods ?

1293 Turbo mini

Think low hieght pistons are .090" down the bore on a std crank

Metro turbo weekend driver,Mini turbo in the making again!

1/4" is rediculous, get onto minispeed and ask whats going on. Whats the engine btw?

I've seen the future and tbh its Pie

hmm low comp!

Alex

AlexF

Well, there you go. Whilst a stock block could possibly 'just' take a 1/4" being milled off it, it's definately not good for applications like the K1100 head conversion.
Why on earth would JE not make pistons to do the job????

I think you definately need to go back to the supplier with this problem, there is not a lot you can realistically do to be able to make practical use of these pistons.

couldn't they be used in a long stroke motor? or am i way off the mark?

Good luck complaining to Minispeed. there customer service is appaling.

I'm still trying to settle a complaint with them which has been going on since the first week in February. I was shouted at down the phone when I complained.

Pistons sound duff mate.

Wil

Fastest 998 mini in the world? 13.05 1/4 mile 106mph

Anyone got a mini Piston to hand (that isn't a JE)??? Give us a quick measure of the comp height (distance from centre of pin to crown) so we can compare it to the JE...

Just Measured a 10cc Omega, 37mm or near dammit.

JF

Std pistons are 1.497in comp height.

Are these 73.5s ?

If so they are for a stroker.

Saul Bellow - "A great deal of intelligence can be invested in ignorance when the need for illusion is deep."
Stephen Hawking - "The greatest enemy of knowledge is not ignorance, it is the illusion of knowledge."

Well - I was emailed a pic from the side of the box that JE pistons came in (you know who you are Thanks! ) and this says 1.272 compression height. Axel says 1.497, so the difference is 0.225" (5.715mm).

Strikes me that the JE pistons are about as much use as the famous Teapot.

Add the 0.225 to the std stroke of 3.2in you get 3.425in or 87mm.

All he needs is a set of S Rods and a stroker crank for about 1490cc!!!

Send em back.

Saul Bellow - "A great deal of intelligence can be invested in ignorance when the need for illusion is deep."
Stephen Hawking - "The greatest enemy of knowledge is not ignorance, it is the illusion of knowledge."

I can't see the point of running piston right down the bore...

My latest engine i have machined the block so they run flush and still found it very easy for a lowish CR.

JF.

I can only think someone screwed up when ordering them - and it hasn't yet been rectified....

Either that - OR - JE wanted to use an existing forging, and 'someone, somewhere' decided this was good enough...

It might have been once - but I certainly won't be buying any...

They wont melt thats for sure.
Take them back they are not fit for the purpose.

Edited by AllanMcD on 30th Mar, 2006.

http://www.rabdunn.co.uk/

thanks for the replies guys. im just annoyed because thats the kind of thing you should be told when you order something. i spoke to minispeed, and they say to skim 250 thou off the block. the bloke reckons hes seena block that was skimmed down to the f of 'wfm' on the side. im gonna send the pistons back. the annoying thing is i had the rods bushed for them because its a smaller pin. so im on the look out for some a+ rods now! does anyone know if the accralite pistons are standard pin to top of piston height?

by the way i worked out comp ratio would be about 7.3 with a standard head!!!

Speak to one of the well respected engine parts suppliers and see what pistons they recommend for you.

Ian at Avonbar is usually more than happy to discuss the options with you etc.

Alternatively you could try Steve at MED, or Simon at Morspeed.

they must be made for a different application.

think about it if they was for a mini in mind then the gudgeon pin of been the right size and the top of the piston would have been the same as well.

i recon these are just being flogged as a part bit piston which will fit after a lot of fucking about.

custom made pistons are exactly that, made to fit not afdter a fashion. best i dont buy none them for £400 squid.

id rather buy a good second hand set first.

always looking for them bigger bunches of bannanas

they never told me when i bought them about the pins or the height. they use them in their turbo engine kit with modded standard rods, so i suppose they must skim all of that off their blocks? this is all their site says about them

"JE +20 18cc dish Turbo forged pistons
The best in the world. Comes complete with Nippon ring set."

not very descriptive. never mind, you live and learn.

Personally before spending £400-odd, I like to have an in depth conversation with the company selling whatever it is, not read the website and be done with it.

i ordered them by phone, and it turns out that the sales person clearly isnt familiar with these pistons, so i was given misleading information. im going for big dish pistons, because i want a good chamber shape, this is the reason for me spending alot. anyway ive learned now so i wont be making this mistake again

It does ot stop and just skimming the block, what about the rocker geometry?..a bit out you can live with that will need a carefull look over...