as anyone try to turbo a 2.7

[jonnyboy]

hi, ive got a 2.7 botton end out of a 525e and going to put a 325i head on it then turbo it. as anyone tryed turboing a 2.7 will it be ok being a high comp engine am going to get a decomp plate made for it aswell. any info would be greatful.cheers

[blingsta]

ive been down that route mate... freshly rebuily 2.7 high comp, then whacked a turbo on... it was lovely for a little while on low boost, but i played with the in car boost adjuster and it went BANG... ... I then thought of buying a 3mm decomp plate to lower compression, but it was too late and spent wasted money on the decomp plate as when it went bang, it ripped the trheads from the block.. !!

Now running a standard 2.5 turbo'd lump... and its all Scwheeeet..

[1an]

Fowlers new car is running a 2.7 a believe

[blingsta]

Yes , it can be done but as stated, mine was just 525e block and 325 head...

[daimlerman]

Could it be done by using 325i pistons and not decking the block?Would that give a low enough comp. ratio? Be worth having a chat to Ant....my main concern would be that a turbo works best at high rpm,the eta crank may not be strong enough to take it for long,a 524 deisel crank would be ideal....

[e30_Turbo]

You can use the 325i block, pistons, rods, eta crank and have a low comp M20B27.

The ETA cranks are not weak, just not as strong as the TD ones, still have YOU ever seen one busted up?

It's been done and works fine, just get as good a block as poss or even get a M20B20 rebored.

HTH,Mark.

[daimlerman]

I am a cautious fella,I have set 6000rpm as my limit for my eta based engine,am I being too much of a girl?

[march109]

Hasn't Ant done one of these for a customer? and built it to last with TD crank so its bomb proof.

Another thread running here about it somewhere.

[e30_Turbo]

I am a cautious fella,I have set 6000rpm as my limit for my eta based engine,am I being too much of a girl?

I wouldn't use those words but your logic seems spot on, 6k is plenty anyway!

I've very rarely seen more than 6k on my datalogs in three years, not that I'm worried about tho as I'm sure most M20's will see 7k occasionally without any problems.

ETA cranks just had bad press for some reason, poss by the owners of all the TD cranks! LOL

[e30_Turbo]

Hasn't Ant done one of these for a customer? and built it to last with TD crank so its bomb proof.

Another thread running here about it somewhere.

Bens car's running the TD crank.

[fowler]

Yes MY Car which is a low comp M20b27 and its gonna come and get you all !!!!!! LOL mad max stylee

[Ant]

I have 2 Turbo 2.7's now, both have Very large Holsets and will provide hours of sideways fun, when least wanted

the "other" one is having a troublesome birth, I think it hates me all buttoned up now though, more shakedown required tomorrow , slippery when wet ? you betch