40 replies to this topic

[WiredbyWilson]

Well about a year ago I bought a dismantled MG 1275 engine from a lad on here and decided it would become my 1330 project after I alredy fitted a 1275 into Frankie.

I sold the head and cam to fund machine work and am pleased to finally annouce the build is under way!!

So on 25/09/08 I dropped my block, crank, pistons, cam etc to the machine shop for it all to be balanced, bored, ground and checked over (all new bearings to be measured fitted too).

Time went by and I didn't like to pester the guy as it was a mates rates kind of arrangemnt through my uncle. But i picked it all back up a week ago.

But he did explain theat when he faced the block he noticed a crack between 2 and 3 - obviously not good. So he put it back on the mill and decided to mill a bit off, didn;t work, milled again, didn't work - then he started to get worried. Milled it a 3rd time and the crack disappeared. So just to make sure he milled it a 4th time and all is well

Time to fit the pistons then - disaster as now the pistons hit tdc above the face of the block - no worries he says i will machine the pistons too

(notice lack of part numbers etc)

So the block and pistons have been decked 15 thou as well - slightly upping my CR - can only be good lol!

And the guy had built it all up as well!! Apparently he always does to check things out.


block

can just see grinding marks from balancing

assembled



So can anyone guess what the mchine work cost me

Wilson

Edited by Wilson1275, 22 January 2009 - 01:59 PM.

[Blitz-Voodoo]

250?

[WiredbyWilson]

Voodoo - nope,

Ok well i will list the work i had done to make it easier:

Crank regrind and supply bearings
Balance crank
Bore block
Face black
Fit 1330 pistons to rods
Balance pistons
Supply & fit cam bearings + ream to size
Machine block and pistons to lose crack
Assemble

[Blitz-Voodoo]

400+

[WiredbyWilson]

lol, will wait to see if there are a few more guesses before tell

[freaker]

as its a friends rate...

180


freaker

[WiredbyWilson]

as its a friends rate...

180


freaker

Not that friendly!!

It cost £315 and got loads of advice too!

[mk1leg]

Another £200 and you could of got a new 1380 half engine from MED............

[Jordie]

Good luck with the build. What cam and head u going for?

Are you going to work out the Compression Ratio before build? Too high and you might need fuel octane boosters etc

[WiredbyWilson]

There is going to be a Morspeed Ph3 cam and a mildly ported head for now till i can afford a stage 3 one.

Dunno how to work out compression ratios though - but i can't see it being that much different can it?

[Jordie]

Yeah it can. Skimmed a few thou off can change it alot.

You need to measure afew things to work it out.

Ive gone for the same cam in my 1380 build, with a stg 4 head.

Ive added a spreadsheet i was emailed from turbominis. You need to work out the values and fill in the boxes on the lower left hand side. Fill in the yellow boxes with your values and the red box will tell you the CR.

Typical values for a standard engine are shown on the top right. Thats reference material only, so you need to physically measure yours using burettes etc..

[Jordie]

Pants it wont upload. PM me your email or msn address and ill send it to you.

[WiredbyWilson]

Just a quickie to say I now have all the parts to build (last one arrived today - cheers Simon ) And im now on a mission as have to get it finished for the end of the month - not saying why though

Gearbox should be back next week too..........

Joride - pm' in-coming

Anyone gut a numpty-ejit guide to timing in the cam??

David

[Jordie]

No guide, but AC DODD says this on the PH3.

I would time this cam at 108 degrees after top dead centre full lift on number 1 intake.

AC

But i dont know what morspeed say, as i didnt get any documents with mine.

Jordie

[WiredbyWilson]

No guide, but AC DODD says this on the PH3.

I would time this cam at 108 degrees after top dead centre full lift on number 1 intake.

AC

But i dont know what morspeed say, as i didnt get any documents with mine.

Jordie

Thanks Jordie - putting it in those words makes it suddenly make sense to me (108 sounds right as there is a cam thread on here i saved to laptop at home giving full details)