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turbo short engine
https://ausmini.com/forums/viewtopic.php?f=5&t=5486		 Page 1 of 2
Author:  mini_matt [ Sun Mar 13, 2005 10:55 am ]
Post subject:  turbo short engine
im taking me 1275 metro turbo block to 1293 . what do people think of o ringing the head and block. what do you think of getting the rods cleaned up and the crank rods pistons and block cryo dipped. mainstrap worth it. i may be runnin in excess of 12pounds once run in. thought and comments welcome
Author:  Boostedmini [ Mon Mar 14, 2005 8:10 am ]
Post subject: 
Yes deff run a main strap if not a steel cap, i am runnign a Graham Russel one in mine with studs instead of bolts and its great, ringing the block and head would be ok but bit of money and i am not sure if there is a gasket to suit, you can buy a reinforced head gasket with double fire control on the bores where you have to machine the block to suit sort of ringing but about $200 not cheap.
yeah i would also clean up rods and crank make it all nice and strong

Grant
Author:  awdmoke [ Mon Mar 14, 2005 1:03 pm ]
Post subject: 
With the torque you're gonna get with that sort of boost, you definiately need to try and hold that crank in place.

I'd peen the rods, but not sure if cryo is worth it.
Author:  Chris [ Mon Mar 14, 2005 5:35 pm ]
Post subject: 
Linebore mains
Check height of deck to crank each end
Machine block deck as necessary
Close and hone rods
New bolts for everything
Main Caps
Balance crank assembly
Crack test crank
Check stroke on each journal
Check rods for twist and bend
Check rod centres for length
Check gudgeon centre to piston crown height
Magnaflux and shot peen rods
Balance rods
Find a bloody good machine shop to do all the above.


And that's just the block assembly. Overkill? Possibly but it will live and be a good motor. My point is that the motor will only be as good as the amount of money you spend on it. The top end requires more money again. I used to presume pistons were all made the same until I started to run karts. I now know they aren't.
Author:  kazjim [ Mon Mar 14, 2005 6:06 pm ]
Post subject: 
I did most of the above, plus

Crank Nitriding (or maybe tuftriding, cant remember.. the one you can do to EN16T ...)
Align-bored the block (oh, you called it Line-bored mains... oops)
Check cam tunnel for straightness
Torque plate honed (yea, i know it doesnt make a lot of difference, but hey, while it was in there.....)
Crank balanced with Clutch assembly and piston wieghts (Dynamic Balancing)

Basically, a strong street build... a'la street machine....

Not cheap.... wont get much change from $1500 JUST more machining !!

J
Author:  mini_matt [ Mon Mar 14, 2005 6:58 pm ]
Post subject:  engine
thanks people im in the mechanical business but still dont wanna have it blow up , what pistons people
Author:  drmini in aust [ Mon Mar 14, 2005 7:02 pm ]
Post subject:  Re: engine
mini_matt wrote:
thanks people im in the mechanical business but still dont wanna have it blow up , what pistons people

Hypatecs would be my choice.
Crown is thick, can be machined to deeper dish if you want. :wink:
Author:  kazjim [ Mon Mar 14, 2005 7:13 pm ]
Post subject: 
Hepolites here (they are the ones with AE on the side arent they ?)
Castings of the "Van" design.... (larger dish i think...) - Low compression anyway....then again, Chris may have sold me anything.... :x
Yes, its THAT chris I'm talking about.... (Coasties and Rover owners know who i mean......)

J
Author:  CLUBMAN [ Mon Mar 14, 2005 7:17 pm ]
Post subject: 
wow that is a big list i gotta follow :D
but like kazjim said,while its out and apart,you may as well just do it once and do it rite.
any other things that should be done in prep for turbo?
Author:  CLUBMAN [ Mon Mar 14, 2005 7:20 pm ]
Post subject: 
11 stud head would also be a good one?
new miniworld has a turbo mini in it using 16 PSI on metro pistons that have been dished out
Author:  drmini in aust [ Mon Mar 14, 2005 7:35 pm ]
Post subject: 
Hepolites (for 1275s) are not as strong as Hypatecs- they have oil drain slots, the Hypatecs are drilled holes instead.
And the Hypatecs are way cheaper too. 8)
Author:  CLUBMAN [ Mon Mar 14, 2005 7:37 pm ]
Post subject: 
what about blue printing,some one tell me about it and if its worth it,and if its outa my reach :D
Author:  gafmo [ Tue Mar 15, 2005 5:38 pm ]
Post subject: 
You tell Us..your Brickworks :shock:
Author:  willy [ Tue Mar 15, 2005 5:41 pm ]
Post subject: 
Nah mate, not even close.
Author:  gafmo [ Tue Mar 15, 2005 5:46 pm ]
Post subject: 
You are willy :!:
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