Author Topic: Turbo Pics and questions (Read 18376 times)

JungleGus · « **on:** August 08, 2006, 05:44:42 PM »

Hi long time listener first time caller here

has anyone strapped a turbo onto their m42 on here? got any writes ups/lists etc?

heres a couple of pics of a local iS turbo, putting out around 350hp (hearsay, but i know who worked on it and $$ gone into it so i don't have any disbelief)

i'm not sure what engine work he has done, but i know its motec.

when turbo, what internals need changing? i imagine just pistons, to change the high compression? does anyone have any pictures of stock vs turbo iS pistons?

thanks for any answers and info, im a bit of a m42 n00b being a m20 man too!

Febi Guibo · « **Reply #1 on:** August 08, 2006, 06:04:10 PM »

welcome!! that is one sweet-looking snail!

asubimmer · « **Reply #2 on:** August 08, 2006, 10:14:19 PM »

mine will be on REALLY soon now, I am going back to college in less than a week and a half and it has to be on by then. Write-up will follow

nickmpower · « **Reply #3 on:** August 08, 2006, 11:06:16 PM »

oooooooo aaaahhhhh do you have any more pics?

JungleGus · « **Reply #4 on:** August 08, 2006, 11:18:52 PM »

nope sorry..thats all i go....tis nice though!

dude8383 · « **Reply #5 on:** August 09, 2006, 03:45:53 PM »

what!! that looks like a really well setup turbo. I love how the coilpack was mounted as well!

Euro Nation · « **Reply #6 on:** August 09, 2006, 08:50:12 PM »

The sticker on the strut tower in the last picture may as well say "Ouch... my ass"

I'll be all over the turbo thing just as soon as I recoop financially from making the car drivable and safe. Then once my car is done I'll be building the parts for other people

Tonyb · « **Reply #7 on:** September 08, 2006, 11:48:20 PM »

Sign me up!!! Can you use a thicker head gasket to lower the comp?

asubimmer · « **Reply #8 on:** September 08, 2006, 11:54:48 PM »

Quote from: Tonyb

Sign me up!!! Can you use a thicker head gasket to lower the comp?

timing chain not belt

idk how much movin you can do w/ that

Tonyb · « **Reply #9 on:** September 09, 2006, 12:01:35 AM »

Ooops! Never thought of that!

asubimmer · « **Reply #10 on:** September 09, 2006, 09:49:47 AM »

thats fine, you can lower it a ton of other ways though.

shave your pistons, new pistons, bore, stroke, ...the list goes forever

Euro Nation · « **Reply #11 on:** September 09, 2006, 02:45:13 PM »

Chain works just like the belt.... that's why you have the indexing squares on the back of the cams and adjustable cam gears. The tensioner will take the slack just like before and all will be well. You could STACK thicker headgaskets and still get away with it fine.

And more bore with the same piston CC will make compression higher.

I'm planning on a thicker M44 gasket. Stacking a couple MLS gaskets would be nice but Cometic gets a ton for those things.

2002maniac · « **Reply #12 on:** September 11, 2006, 04:40:36 PM »

Quote from: asubimmer

timing chain not belt idk how much movin you can do w/ that

There is alot of room with the tensioner.

D. Clay · « **Reply #13 on:** September 11, 2006, 05:19:09 PM »

Aha! So that's what the slots in the cam gears are there for - i.e. adjusting the relationship between the crank gear at TDC and the cam gears to compensate for variations in head gasket, deck height, etc.
http://www.m42club.com/forums/showthread.php?t=1175
So how do you do it when you are reassembling the engine? Does Bentley cover this?
I try to learn something new every day, I'm going to bed now!

asubimmer · « **Reply #14 on:** September 11, 2006, 05:24:54 PM »

Quote from: 2002maniac

There is alot of room with the tensioner.

lol cool, I didn't know but I figured it was something to take into account