Oops, forgot the 2mm head gasket- heres what I worked out Mark: Bore 86 Stroke 96 Piston pin height 31.6 Conrod length 145.9 Chamber volume 45.2 Block height 227.45 Piston dish 13 Shaved deck no Number of cylinders 4 Head gasket thickness 2 Head gasket volume 14.47 Deck height -1.95 Volume under deck 11.32 Swept displacement 557.64 Engine displacement 2230.58 Compression ratio 7.63 Rod/stroke 1.519791667
Tom Richardson wrote: > No, the dish size is 13cc. The reason why the compression ratio is > nice and turbo friendly is that the piston is 1.95mm under the deck. > The Z20E pistons are actually 31.6mm, and regular L series pistons are > all 38.1mm. > > Here's the data for Mark's engine: > > Bore 86 > Stroke 96 > Piston pin height 31.6 > Conrod length 145.9 > Chamber volume 45.2 > Block height 227.45 > Piston dish 13 > Shaved deck no > Number of cylinders 4 > Head gasket thickness 1.2 > Head gasket volume 8.68 > Deck height -1.95 > Volume under deck 11.32 > Swept displacement 557.64 > Engine displacement 2230.58 > Compression ratio 8.12 > Rod/stroke 1.519 > > > > David Costello wrote: > >> hehe well that explains it then, those piston dishes must be pretty >> deep, >> 40cc is huge >> >> when I said 32mm Z20 pistons I was refering to the compression >> height. The >> Z20's have 2 different pistons one set are 32mm high, the others are >> 38.55 >> I was assuming you used the 32mm ones cause the 38.55mm ones would be >> above >> deck height >> >> Dave >> >> >> ----- Original Message ----- >> From: "mark krawczuk" <[EMAIL PROTECTED]> >> To: <[EMAIL PROTECTED]> >> Sent: Thursday, June 27, 2002 11:09 PM >> Subject: Re: Tuning Cars (off topic) >> >> >>> my bore is 86 mm, the gasket hole is a little bigger , so i reckon >>> that >>> >> it >> >>> would be a hole of about 87mm. >>> my head cc is 45 >>> bore 86 >>> stroke 96 >>> 2mm head gasket approx 11.76 cc >>> >>> the volume with dished pistons that havent been machined , and the >>> piston at tdc is 40 cc. (fluid level with top of block) >>> >>> what do you mean 32mm z20e pistons, mine pistons are 86 mm ( 1 mm >>> oversize) >>> >>> >>> i have been plugging these figures in a comp ratio calc and seem to be >>> getting about 6.7:1 comp can any body double check these figures? >>> i know before i said it was about 7.8 :1 but this is what i was >>> pretty >>> sure it was... which was of the top of my head. >>> the figures above are actually what i have written down. >>> >>> >>> mark k >>> >>> ----- Original Message ----- >>> From: "David Costello" <[EMAIL PROTECTED]> >>> To: <[EMAIL PROTECTED]> >>> Sent: Thursday, June 27, 2002 6:56 PM >>> Subject: Re: Tuning Cars (off topic) >>> >>> >>>> shit, how'd you get the compression that low? >>>> the dish on the pistons must be huge >>>> using Z24 crank, L20B rods, 2mm copper gasket and the 32mm Z20E >>>> pistons >>>> >> it >> >>>> gives a comp ratio of 11:1 >>>> and you said you were running 87mm bore...that's around 11.4:1 >>>> >>>> Dave >>>> >>>> ----- Original Message ----- >>>> From: "mark krawczuk" <[EMAIL PROTECTED]> >>>> To: <[EMAIL PROTECTED]> >>>> Sent: Thursday, June 27, 2002 8:08 AM >>>> Subject: Re: Tuning Cars (off topic) >>>> >>>> >>>>> hi, i have dished z20 ( you can get flat or dished), which i got >>>>> >>> machined >>> >>>>> out a bit more, then when i had to redo he engine i just put the >>>>> dish >>>>> >>>> type >>>> >>>>> back in withoutt geting them machined out more. i can work it out >>>>> >> more >> >>>>> exact if ya want me to but i think i ended up with about 7.8:1 or >>>>> >>> 7.9:1 >>> >>>>> and yes, z20 pistons on l20b rods. >>>>> >>>>> mark k >>>>> ----- Original Message ----- >>>>> From: "David Costello" <[EMAIL PROTECTED]> >>>>> To: <[EMAIL PROTECTED]> >>>>> Sent: Thursday, June 27, 2002 12:41 AM >>>>> Subject: Re: Tuning Cars (off topic) >>>>> >>>>> >>>>>> hey mark, slightly off this threads topic here, but what compression >>>>>> >>>> ratio >>>> >>>>>> did your L/Z combo end up with? >>>>>> you used Z20E pistons and L20B rods didn't you? >>>>>> >>>>>> Dave >>>>>> ----- Original Message ----- >>>>>> From: "mark krawczuk" <[EMAIL PROTECTED]> >>>>>> To: <[EMAIL PROTECTED]> >>>>>> Sent: Thursday, June 27, 2002 1:07 AM >>>>>> Subject: Re: Tuning Cars (off topic) >>>>>> >>>>>> >>>>>>> i have pics of the body, and engine but non of the internals of >>>>>>> >> the >> >>>>>>> engine. i did have some internal engine film on a handycam tape >>>>>>> >>> but >>> >>>>> it >>>>> >>>>>>> got chewed up, when i get the energy i might see if i can salvage >>>>>>> >>>>>> something >>>>>> >>>>>>> of it. >>>>>>> if you want i can burn u a cd with some pics of my datsun. email >>>>>>> >> me >> >>>> : >>>> >>>>>>> [EMAIL PROTECTED] >>>>>>> witth a postal addresif you want them .. for free !!!! >>>>>>> >>>>>>> mark k >>>>>>> ----- Original Message ----- >>>>>>> From: "Paul Stanley" <[EMAIL PROTECTED]> >>>>>>> To: <[EMAIL PROTECTED]> >>>>>>> Sent: Wednesday, June 26, 2002 11:01 PM >>>>>>> Subject: Re: Tuning Cars (off topic) >>>>>>> >>>>>>> >>>>>>>> Do you have pictures? >>>>>>>> >>>>>>>> From: Paul Stanley >>>>>>>> [EMAIL PROTECTED] >>>>>>>> >>>>>>>> >>>>>>>> >>>>>>>> ----- Original Message ----- >>>>>>>> From: mark krawczuk <[EMAIL PROTECTED]> >>>>>>>> To: <[EMAIL PROTECTED]> >>>>>>>> Sent: Wednesday, June 26, 2002 4:47 PM >>>>>>>> Subject: Re: Tuning Cars (off topic) >>>>>>>> >>>>>>>> >>>>>>>>> l20 b block (4cyl), with navara 2.4 crank,z18 efi head, T3 >>>>>>>>> >>>>> turbo@10 >>>>> >>>>>>> psi, >>>>>>> >>>>>>>>> ivan ttighe cam,boost retard dizzy,v8 commodore throttle body >>>>>>>>> >>> and >>> >>>>>>> toyota >>>>>>> >>>>>>>>> 7mgte injectors.......... >>>>>>>>> >>>>>>>>> mark k >>>>>>>>> >>>>>>>> >>>>>>>> >>>>>>>> >>>>>>> >>>>>> >>>>> >>>> >>> >> >> > > > --membersozdat------------------------------------------------------- OZDAT Mailing List Please Note:- Send (un)subscribe requests to [EMAIL PROTECTED] Send submissions to [EMAIL PROTECTED] No unauthorised redistribution of this email http://www.ozdat.com/ozdatonline/index.htm http://www.ozdat.com/ozdatonline/listindex.html http://www.mail-archive.com/[email protected]/ ---------------------------------------------------------------------
