sorry to butt in I was just ready your email about your LZ24 motor,in
my datto I have a modified z24 block (how modified i forget,going
back two years) and is attached to a highly modifed 20b head.The
speedo just clicked over 11,000 miles and it was brought s/h of a
friend
which used to be in a off road competition buggy and I just fitted
straight up to my datsun. When I fist brought it i rigged up twin
su's off a 4.2 liter jag but I couldn't afford the fuel bills so
about a year or so ago I got set up with fuel injection and the
computers cut off is at 6,500 rpm and I generally spin it up to 6,000
rpm in 1st 2nd 3rd, and once in forth 120mph (so i don't do it much)
and it spins up really easy and loves it around 4000, 4500 rpm. the
only problems have been 1 cooked h/d 8"'clutch and pressure plate and
flywheel, and a now very tired 3:5 diff. It was dynoed but the shop
said there machine didn't do charts but said the rear wheel horse was
around 130- 140hp> my efi system is off a 180b jap import motor
fitted up with vg30 throttle body and a (link) management system.
>David,
>
>Thanks for the update. I've been considering building a Z22 based motor but
>I'm concerned that I'll lose the top end due to the reduced rod/stroke and
>bore/stroke ratios. I like torquey motors as much as the next guy but my
>motor needs to have strength above 5000rpm. If you get any dyno charts made
>up I'd be most interested to see the power and torque curves when a free
>flowing induction system is used (as I'm sure everybody else would be too!).
>What type of EFI system are you going to be running it with?
>
>Cheers
>
>- Tom
>
>-----Original Message-----
>From: [EMAIL PROTECTED]
>[mailto:[EMAIL PROTECTED]]On Behalf Of David Thompson
>Sent: Friday, 13 April 2001 12:53 AM
>To: [EMAIL PROTECTED]; [EMAIL PROTECTED]
>Subject: Re: [LZ24, Tom Richardson - David Thompson]
>
>
>Tom,
>the LZ24 is going well. It's done 700 miles now - almost run in. Although I
>have a custom EFI to fit, I wanted to run it in using a carb, so that it did
>not get over-revved at the dyno shop. I understand that it wont rev out as
>fast as a standard stroke engine, but the torque should compensate.
>I used a z24 crank and 89mm pistons (re-sleived)with l20 rods. The l20 rods
>have been modified to suit full floating pistons, and so a bearing has been
>inserted at the small end of the rod. When this was done, the bearing was
>inserted lower than standard height, efectivley decreasing the rod length by
>a
>couple of mm. Also, pergeot v6 pistons were sourced and the dome machined
>off
>the top to produce a 10.4 cr with a 2mm copper head gasket and re-shaped
>combustion chambers. To compensate for the inability to rev out as fast as
>usual, I lightened the flywheel and used the full floating pstons.
>Since I'm using a bluebird carb on an old 180b manifold, (very small port
>diameter relative to the head) the engine struggles to get enough fuel to
>breath properly. That said, the engine is very strong, and has already
>broken
>2 diffs!
>Regards,
>David Thompson.
>
>"Tom Richardson" <[EMAIL PROTECTED]> wrote:
>David,
>
>If you're still about, hows the LZ24 going? I'm keen to find out how it
>goes and how much it revs out!
>
>Cheers
>
>- Tom
>
>
>
>____________________________________________________________________
>Get free email and a permanent address at http://www.netaddress.com/?N=1
>
>
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