RPMZ

Looking good indeed ..................

Azman......... I'll be going to see Zworx next week sometime to repair my window winder, so if you need anything from I am the person to talk to P.S. I am located in Glenroy. You can catch me on msn or email me on yatzka@hotmail.com Jack

oooooohhhh......... I do like the engine conversion, please keep us updated on the car progress. Looking very good so far. I am not big on convertibles, but everything else looks promising.

Soulio ......... you're classic .............. great work considering you had fark all to work with. If you need fast web space for future videos let me know

NZeder .........sounds like a really nice engine you are building, especially being EFI. What computer will you be running. I mentioned fuel consumption as I know a few people in the Zed community here like using their cars on daily basis. I personally don?t, as I wouldn?t want to be stuck in traffic on the way to work and back, however not everyone has the luxury to have 2 cars. The 103rwkw doesn?t sound like much, but it comes down to who?s dyno you use. I saw an race build L28 with triple Webbers, 74* cam make only 102rwkw, so in my opinion dynos are for tuning and if people want to compare figures, they should comparing their ? mile slips and what MPH each car is doing, that way you get a better idea how much balls the car has. The times might be all different due to tyres, suspension, traction etc. but MPH should be consistent. With 103rwkw I still think car would?ve done high 13 second pass as it had 4.11 LSD, therefore the ratios were rather close, plud I did race a car that did 13.9, and I was tiny bit quicker. With 150rwkw you should be doing low 13s with around 105mhp??? let us know how you go

I think I might be a good person to respond to this topic as I have had both engines in my car. Well I had a 3L L28, which wasn?t stroked, but bored out a lot to Just over 3L, revved nicely to 8000rpm, and currently I have an L28 Turbo injected. Here are quick specs of both motors. 3L. L28????F54 block, P90 head, forged pistons, comp vale springs, 76* cam, 10.5 ? 11:1 comp ratio, ported head, Twin SUs setup correctly. L28 Turbo ???GTR pistons, low comp 7:3 to 1, turbo custom cam, custom exhaust manifold, GT30 turbo, Autronic SMC etc.etc. BTW?? the person who ended up buying my 3L motor raced in some class in QLD for 4 years finishing each season in top 5. The 3L made about 103rwkw with SUs, can?t remember at what RPM, with webbers 45mm which I got later would?ve made about 130rwkw I think. It drove very nicely even with 76* cam, as it did have 3L to help. The cam really came in hard at 4000rpm but it was still very flexible and drivable below 4000rpm as well. The car made the best induction noise that I ever heard from a 6 cylinder. It also would spit out fumes of up to 3-4 meters as it was lumpy, and very noisy. It made fantastic raw old school noise. I raced a 240z L24 Turbo, T28, old motec ecu ? and I just beat the car. The other car was making 102rwkw. However with SUs and 76* cam the motor wouldn?t idle below 1300rpm, it would get about 18-20L of fuel per 100kms taking it easy. With webbers around the city fuel consumption would be much worst. The current L28 turbo makes 220rwkw (on Racepace dyno) at around 5500rpm, redlines at 6700rpm and it makes over 200rwkw from 4000rpm. It is much more quite than 3L, just little more driveable down low below 3000rpm, most likely due to EFI. The car makes heaps of torque as it went through 3 gear boxes in 12 months (FJ20 modified box, L28 box, 1 mixed box of parts) All 3 boxes had 3rd gear stripped when flat sticked rolling in 3rd gear (torque gear) Now I finally got the RB25det box in, no problems since. The turbo motor is far easier to live with on daily basis and fuel consumption is great. It?s about 11.5 to 12L per 100kms, and that?s not just cruising. The car still makes that lumpy NA L28 motor sound, but once on boost the turbo makes a bit of induction noise. I?d never go back to a NA motor again, unless it was for historic racing or some hardcore restore job. However it all comes town to $$$. The Turbo motor makes more than double the power of the 3L in my case, however it would cost twice as much to build. Plus on top of that if you wish to push more than 200rwkw you will need a better g.box with a new tail shaft, put in CV shafts, get a good LSD in an lower ratio ie. 3.5 or 3.7, modify fuel lines, add electric fuel pump or pumps, surge tank recommended, Once you?ve done all that you need to upgrade your brakes to get engineers certificate (another $500) 3L is better option if you are on a smaller budget or want to maintain old school look and feel etc. However if it will be carburettors (webbers or similar) you won?t want to use it on daily basis as fuel consumption will kill you. To build EFI 3L stroker with throttle bodies cost nearly as much as a turbo motor. Once you built your 3L stroker, you?ll proudly be cruising down the street and you?ll have a P plater rock up in a 15 year old Silvia with a T28 on it that he got for $1200, kick you?re a$$ sounding like a law mower with an oversized exhaust, you might rethink you engine  P.S. I do have a friend whom has an old silvia with T28 that did 12.4@109mpg (on slicks) The best value for money is a RB30 turbo motor as you can keep fairly stock and still get good power out of it. It?s relatively easy to install, cheap and easily available. Stock-ish motor will easily make 200rwkw with a few bits and make loads of torque. If you feel brave and want the smoothness of a twin cam motor go RB25 which standard bottom end should be good for about 245rwkw, but will need bigger turbo. Stock turbo is good for 190rwkw max. If you feel even braver and you just sold a kidney, go for RB26 which with stock turbos will make up to 255rwkw on 15psi, but you will need cam gears and good exhaust. I was lucky enough to get a RB26 from a friend for dirt cheap price (no turbos) going single turbo anyway, so 1 day when I get my sh!t together and put it in, I?ll be able to do the compare of the 3 motors lol  BTW ??.Gav when I took you for a spin last time, car had the old crap laggy turbo with 190rwkw, new GT30 is so much better. P.S. I am happy to do a dyno or 1/4mile compare vs a 3L stroker??.. Quarter mile I?ve done 12.12@117.5mph on pulp fuel street 18? tyres. What?s the best time for a 3.1L stroker and with what diff ratio? I?m sure ?thehelix112? will be happy to help too He has a nice GT35R on his car. P.S.2 This strictly for scientific and education purposes only OMG ?? this report felt like doing home work???.. lol

Sounds like fun........... I'll come down, been a while since my last car outing.

Looks like a quick car ......... NOS isn't really needed in a 1100kg car...... and the wheels look good Cool vid, thanks for posting it

I won the 2wd drive knockout challenge (240z vs 350z vid), my problem was no handbrake therefore didn't do so well on skidpan as every course had hand brake turns, I had to use compression lock up power over-steer. However on the long track I was 2nd fastest overall behind a hardcore R34 GTR. Came home with 3 trophies  All great fun at DECA with bunch of cool people ? there is another one on in May if people are interested.

Yes I am .... Another video 350z track vs 240z in a knockout challenge ...... http://www.yatzka.com/240z_vs_350Z_track.wmv

Hello people ........ A friend of mine shot bit of a video at deca and did a great job editing it. Most of the footage is my 240Z, but there are other cars too. Very cool vid, some of you might enjoy it. http://blkcrx.hondata.com.au/yatzka/videos/videos/sau@deca_med.divx "save target as"

I had heat issues as well as I have a turbo and manifold generating a lot of heat on the L28. Vents in the bonnet is a good start. I can see the air distort as hot air leaves through the vents. Tape for extractors is also good, just doesn't look very pretty.

Cool concept .......... it's funny how many retro cars from 60s and 70s are being redone by many manufacturers.

Jimbo ........... are you asking about expansion tank or overflow tank/bottle as I posted a pic of expansion tank for bleeding air out of the cooling system, but I got a feeling you are talking about overflow tank?

I have one, as I really needed to bleed the air out of my system as my external water cooling to head became the highest point on the cooling system. Here is a pic of it. It was custom made for about $150 if I remember correctly.