did you modify the dizzy advance curve? I remeber you have a series 2 electronic, the total mechanical ignition advance on that is too much for a turbo and will ping/crack ring lands. mine has been limited to 6deg mechanical advance and even then the 6 degrees comes in too soon (need to add heavier weights to get it to come in later).
zac > RE: Z18 questionshi, i talked to stewart w ralling and he said the > pistons would be good for 12 lb.( and i was running 15 lb for about 5 > mins ) and stewart also said that it was dentonation > > > i also phoned up a turbo place in nsw, and he said it was > dentonation. > > the two pistons looked absolutely fine > , besides the cracked lands, no sign of any other damage. > > > > any ideas on how to controll dentonation? the dizzy was modified > for 15 degrees, with engine idling and vac line disc, and a total of 20 > degrees. > i have a inter cooler, would water inject be a good idea? > > > > mark k > > ----- Original Message ----- > From: Rowe, Adam > To: [EMAIL PROTECTED] > Sent: Wednesday, November 21, 2001 9:17 AM > Subject: RE: Z18 questions > > > Are you sure it was the boost, and not the detonation, that broke the > ring lands? > > -----Original Message----- > From: mark krawczuk [SMTP:[EMAIL PROTECTED]] > Sent: 20/11/2001 20:48 > To: [EMAIL PROTECTED] > Subject: Re: Z18 questions > > hi, steve t are u using factory z18 turbo pistons, what boost are > u running? > > the ring land below 1st ring is cracked, stewart w ralling said > that i was running too much boost (15 lb) > > mark k > > ----- Original Message ----- > From: steven.taylor <mailto:[EMAIL PROTECTED]> > To: [EMAIL PROTECTED] > <mailto:[EMAIL PROTECTED]> > Sent: Tuesday, November 20, 2001 8:18 AM > Subject: Re: Z18 questions > > Does it have a set of extractors on it or has the stand. exh > mani been modified at all?? Is there a water feed running from somewhere > into the turbo?? If not , like adam said i doubt its a T25/28 as the > stand z18 used a T3 which is a complete diff bolt pattern. They never > came out with a T25 from factory.... > As for the question of the head ive had my head shaved 2 times > on 2 different rebuilds and it still runs up to 20psi no probs on the > standard bottom end.As for how much boost you can run that will depend > on what injectors are in it and how hot the air is thats getting pumped > into it. > As for just bolting a L18 bottom end onto it i dont see any > particular point whatsoever. Unless you spend money setting it up to > handle a forced induction lifestyle, and then u may aswell of used a z18 > bottom end to start with. > As for power mine made around 90kw@wheels@10psi in pretty > standard form. 176hp@wheels sounds like a crock of shit/attempted > selling point to me. > Steve. > > David Costello wrote: > > it wasn't my choice to shave the head, they had some problems > with it and it was either shave the head or replace it and he didn't > have the money at the time..are Z18 head relatively cheap/easy to find > cause I'd be looking at replacing it. also he didn't downgrade from a T3 > down to the T28the motor had a T25 on it when it came in from the > importers, he upgraded it to a T28. I can't use a Z22 bottom end cause > the car it's going into is only just over 800kg which limits me to a 2L > with forced induction. I have a spare L18 bottom end here, can I just > bolt that under the Z18 head, instead of going to the trouble of > stripping the current one down to inspect it. Dave > >
