As a matter of fact I have a "Race-tronics" engine dyno printout of it:
With Twin SU's: max 160hp at 5500, max 173ft-lbs at 4200. With the SC12 and 500 holly (approx 4psi): max 228hp at 5500, max 242ft-lbs at 3200. Note both power curves have not plateaued at 5500 and the dyno sheet doesn't go any higher. I'm yet to see how well it will rev past 5500, will let you know. Oh and other stuff before I forget, its running a VT commodore PS pully on the crank which drives the SC. It also has a mild crowe cam which I have the full specs for so can give you those if you want. Regards, Dave >>>>>>>>>>>>>>>>>> Original Message <<<<<<<<<<<<<<<<<< On 8/20/02, 12:23:22 AM, Bob <[EMAIL PROTECTED]> wrote regarding RE: L28->240Z almost there! Questions.: > I will be really interested to hear about how this setup gets allong, > my L26 has a limited lifespan and I will probably be looking at a bit > of a step up in the performance stakes. I dont suppose you know any > dyno figures for the setup? > ------------------- > > Terry, > > > > Sorry I was vague on my previous post. The clearances I'm talking > about > > is between the SC mounted where the AC pump used to be, and the > passenger > > side chassis rail. The SC is wider than the AC pump was and there is > > about 8mm gap between the SC and the chassis rail (note: now 25mm > and now > > the top of the SC hits my extractors.. grrrr.. going to slot the sc > > mounting bits so i can try to find a nice even spot). Anyway.. what > I > > meant was in relation to how an engine will "twist" when its revved? > How > > it moves sideways a bit? How much clearance do i need between SC and > > chassis rail so it won't bang when i plant it? > > > > The L28 sits exactly (as near as I can tell) where the L24 did so > the > > angles between gearbox etc should still be good. > > > > Thanks for the detailed response, appreciate your time/input as > always. > > :) > > > > Dave > > > > >>>>>>>>>>>>>>>>>> Original Message <<<<<<<<<<<<<<<<<< > > > > On 8/18/02, 11:02:16 PM, "Terry Rudd" <[EMAIL PROTECTED]> > wrote > > regarding RE: L28->240Z almost there! Questions.: > > > > > > > Dave, > > > > > You have been busy. > > > > > With regards to your question I don't fully understand what you > are > > asking > > > about so I'll write in very general terms - usually clearances are > seen > > to > > > be OK by engineers RTA types etc as long as there isn't any > evidence of > > > solid component contact at anytime. They mainly look at exhausts, > > alternator > > > brackets, filters, air cleaner assemblies and the like. > > > > > What component(s) are you referring to that have only 8mm > clearance eg > > sump > > > to xmember? > > > > > Does a 240Z have a split tailshaft? It's so long since I looked > under one > > I > > > can't remember. If they have a split shaft then ignore what I'm > about to > > > write as it only applies to single piece tailshafts. > > > > > One thing to watch when you modify the natural position of the > engine > > > and/or gearbox is that you don't upset the plane between the > gearbox > > output > > > uni the diff input uni. If the distance between plane is outside > 5% from > > > parallel then this will put the unis out of harmony with each > other and > > it > > > will cause all sorts of noises and/or vibrations at certain speeds > on the > > > road, technically it's relative to tailshaft revolutions but much > the > > same > > > thing. I've seen this problem with gearbox conversions in 1600's > as it's > > > very often overlooked and it will also come into play if you > modify > > engine > > > mount heights and not modify gearbox mounting heights. I'll try to > draw a > > > simple picture as if you've never had someone explain this to you > while > > > under a car, it's a bit difficult to get a handle on. > > > > > gbox uni ---------------- > > > ---------------- diff uni > > > > > A one piece tailshaft typically follows a straight line from the > > beginning > > > of the top broken line to the end of the bottom broken line and as > the > > > gearbox and diff in the example are in a parallel plane the angles > that > > both > > > of the unis spin in are the same and everything will be sweet. If > you > > move > > > either of these components up or down so the angle on the unis is > greater > > > than +-5% of each other then they'll rumble. How did manufactures > get > > around > > > this problem in the family car or race car for that matter? Invent > the > > split > > > tailshaft, and I wish our early Dattos had them, especially those > with > > IRS > > > ala 1600. > > > > > Does this problem occur in IRS uni half shafts? Short answer is > Yes, but > > as > > > a driveshaft is ~2' long, then 5% is a much greater distance to > modify > > the > > > position of either the diff or the short axle. Interestingly, > lowering a > > > 1600 has far less effect on this in the rear end as does fitting > > > wheels/tyres that are way oversize from stock. Anyone who's been > in a > > 1600 > > > with 17's with the rear springs that have about 1/3 of them cut > off and > > > stock uni half shafts fitted would have noticed the racquet that > goes on > > in > > > the rearend. How did manufacturers fix that one? They invented the > CV > > > shafted rear end. > > > > > I recall reading recently that someone is snapping half shafts or > unis, I > > > would mind betting that there is a bit off, could even be > something along > > > these lines in the rearend of that Datto as you have to really try > hard > > to > > > snap a uni - side stepping the clutch at 6 grand with 300 hp on > tap on > > > slicks can do it though. > > > > > regards > > > Terry > > > > > > > > > > > -----Original Message----- > > > From: [EMAIL PROTECTED] > > > [mailto:[EMAIL PROTECTED]]On Behalf Of David > Andrews > > > Sent: Saturday, 17 August 2002 8:24 PM > > > To: [EMAIL PROTECTED] > > > Subject: L28->240Z almost there! Questions. > > > > > > > G'day All, > > > > > Well I spent today plonking my L28 into my 240Z and am happy to > report > > > that everything is going well so far. This is the supercharged > (baby > > > SC12) engine I just purchased and my query is with regards to > clearances > > > for the chassis. How much clearance between engine/chassis is > required? > > > Currently there is bugger all (8mm) but I'm modifying the mounts > tomorrow > > > which should take it up to around 25mm. Will this be enough? > > > Regards, > > > > > Dave > > > > > > > > > --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]/ > > > --------------------------------------------------------------------- > > --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]/ ---------------------------------------------------------------------
