Jump to content
SAU Community

Recommended Posts

Sure is Harry, O S GIKEN made the head and last I heard never to be again. Paul Newman and Bob Sharp had them in their 280ZX Turbos the year (I think 83) when Paul Newman won the US Sports Car title in an S130 280ZX turbo.

Link to comment
https://www.sau.com.au/forums/topic/186712-twin-cam-l28/#findComment-3374471
Share on other sites

hybridz.og has had extensive postings and communication about the DOHC L6 concept

there is one fella who got 3x KA24de (2.4 litre nissan bluebird) heads, chopped em up, and bolted together etc. $15,000 doesnt seem to go far in this concept either. it isnt even running yet!

for the same price you could get a single cam L6 to produce more power in the first place.

it all comes to dollars....

Link to comment
https://www.sau.com.au/forums/topic/186712-twin-cam-l28/#findComment-3375992
Share on other sites

I think theres alot of people out there who would sell an arm or 2 to get ahold of one of those OS giken twin cam heads.

Nissan also produced a twin cam head of their own for the L series 4 cylinder. They called it the "LZ"

Theres a bit of info on it here datrats

Pic of the OS giken twin cam head for a L4

OS_GIKEN_TWIN_CAM.jpg

check this car out too -

240Z with TC24 B1 head(OS GIKEN)

Woulda loved one of them for my c210 :blush:

Link to comment
https://www.sau.com.au/forums/topic/186712-twin-cam-l28/#findComment-3376897
Share on other sites

^^ that's a 4 cylinder DOHC. You can also use a Z18 DOHC head to make an L20 into a DOHC. L28's are 6 Cylinder

nismo makes a DOHC head too for the L28 from what I've read.

I was actually reading an article this morning in a japanese mag about some guy's Z with an LD28 (converted to petrol) and DOHC head... I'll see if I can scan the article.

link to the hybridz buildup: http://forums.hybridz.org/showthread.php?t=120659

intercoolerpics1_012-600x450.jpg

FrankPics_023-600x398.jpg

Link to comment
https://www.sau.com.au/forums/topic/186712-twin-cam-l28/#findComment-3376908
Share on other sites

The F3 or Formula Pacific head is expensive and very extreme cam wise for anything on the street .

A couple of years ago I found a thread on some US board about converting a KA24DE head to an L series 4 . At least the bore centres are right and I think the stud holes may be close or same . The problems from memory were always going to be the cam drive chain and timing cover . I guess with enough money you'd get it to work but then again a de stroked KA DE short with longer rods may be cheaper and easier if you wanted to rev it . Can buy turbo exhaust manifolds and better cams/springs over there from JWT and probably others nowdays . Pretty sure KA and SR use the same bellhousing pattern as well .

Good to see the big fella back , cheers Adrian .

Link to comment
https://www.sau.com.au/forums/topic/186712-twin-cam-l28/#findComment-3377272
Share on other sites

  • 1 year later...
i want someone to build a rb30/26 with 13:1 comp and huge cams for some 400hp+ na power
Late posting to this thread but I know that has been done here in NZ in a 240z race car - it runs 50mm DCOE Throttle Bodies large cam and is making around 380hp in na power. Edited by nzeder
Link to comment
https://www.sau.com.au/forums/topic/186712-twin-cam-l28/#findComment-4341365
Share on other sites

Ummm Z18 is a single cam head, and the conversion is Z18 head on an L20b block to make an Z20ET using the stronger L series bottom end over the shitty Z20/24. And yes there was a KA24DE head conversion done by a dood over on Ozdat which was also turbo'd, BUT, it took him a lot of time and farking around and really didn't produce any significant numbers performance wise. Oh and I've seen video of that OS L4 head in action and all I can say is OMFG 8)

Edited by IronmaskDR
Link to comment
https://www.sau.com.au/forums/topic/186712-twin-cam-l28/#findComment-4342276
Share on other sites

Yes there was an os giken twin cam for the L6, but none of the pictures in this thread are of one. The youtube link and the pictures are of the guy from hybrid z that used KA24 heads on a L28.

Here is what the TC-24 B1 looked like (The TG in the advert is a mis-print, is is TC).

O.S._GIKEN_TG-24_-1.jpg

Link to comment
https://www.sau.com.au/forums/topic/186712-twin-cam-l28/#findComment-4342417
Share on other sites

nismo makes a DOHC head too for the L28 from what I've read.

That doesn't ring any bells with me. Are you sure you're not getting confused with the x-flow 'LY' head that was run as the first Nissan EFI rally as the LY25 in a Z?

Here's a photo of a TT TC24-headed engine (from a long time ago...)

post-13940-1230778860_thumb.jpg

Link to comment
https://www.sau.com.au/forums/topic/186712-twin-cam-l28/#findComment-4342759
Share on other sites

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now


  • Similar Content

  • Latest Posts

    • So, I started this repair and got as far as "fixing" the holes with some fibreglass. God all those years working on boats came back quickly. I decided I'd reach out to some rust guys just to see what they would say about it. I came across a guy about 40 mins away and went to see him. He said the windscreen needs to come out, that there might be some more bits around the windscreen and he'd quote them at the time. But his quote was $300 to remove and replace windscreen and $3k for the damage he can see. He said he could respray the roof for $1200 and the bonnet for another $800 (somebody has previously rattle canned it, its horrendous). This is $5300 + any small additional bits. It's a lot, I get that and the name of one of my fave youtube channels 'Not Economically Viable' comes to mind.  I'm not being financially rational, but I've taken him up on the quote. He's opening a new shop in November with more room, so we're waiting for that. I'll leave the currently missing headliner out until then. I'm looking forward to it being fixed and having the paint looking nice again (lots of clear coat issues on the roof too). / flame suit on.
    • Oh and some up-and-comings; New rear drivers wheel bearing. I'll do that this weekend while the diff is out. The car is already up and the d/c axles and missing exhaust will help with space. This is the last bearing for me to do and I've been dragging my feet on it. I also have some new EBC blue stuff pads for the car and some new brake fluid. I haven't ever flushed the fluid in this car and looking forward to it. I have 600 degree fluid to put in. Not exactly "race fluid" but better than the typical stuff I have been using.
    • A proper clutch/plate type mechanical diff with quite a lot of pre-load and high locking % is better for drifting. Much more consistent in its behaviour. A helical can be annoyingly vague and inconsistent in how it responds under the sorts of abuse found in drifting.
    • Some updates here. I pulled the entire interior out, minus some trim to respray the seats with Colourlock dye. It turned out really nice though I accidentally let the dog in the car after and she scratched up the front seat.  This is what it looked like before, the colour was just washing out everywhere but thankfully the leather was in good nic. Then after the respray   And after the bloody dog jumped in The headliner is out waiting to be retrimmed, but it will stay out now until Nov - see why below. I replaced the stereo/headunit with a period-styled Android headunit. I have no after pics, but I'll get some. This is because of the missing pixels. I tried to fix this twice with replacement ribbon cables but couldn't. Also the bluetooth interface I'd bought for this was crap. Then there's the rusty roof. Pics and info in this other thread. I have decided to get this repaired professionally, but I'll update that thread. This is why the headliner will stay out for now. I'll be getting the roof and bonnet resprayed at the same time the rust is fixed. I also had an interesting issue with my drivers door lock.  For a small period I was having issues getting any 12v power to the car - I mean *any*. It would have no dash lights, nothing. It happened while I was at the shops and I couldn't get in the car. So, we had 2 problems. The most pressing here is that I was locked out. I have only a single physical key hole on the car, the drivers door and no amount of turning would unlock the car. Surely it doesn't need power for this? The second issue is why am I losing all power periodically, The battery isn't dead, its almost like the battery isn't even there. Two issues that were surprisingly easy to fix. You fellow BMW over-engineering lovers will appreciate this. The lock in the door has 5 states; mechanical lock, electric lock, neutral, electric unlock, mechanical unlock achieved at -90 degrees, -45 degrees, 0 degrees, 45 degrees and 90 degrees. Although, the unlock is towards the front of the car, so opposite for LHD countries. Sticking the key in and turning 45 left or right is what is used 99% of the time. It activates the central locking etc. 90 degrees is for dead battery access and, obvs, only un/locks the one door. But because the mechanical lock is never used and is 27 years old, it seizes up. I was totally unable to turn the key far enough to get to the mechanical unlock (At the time of locking myself out, I didn't even know this was a thing). I eventually did it with some vicegrips and teflon spray.  I made a quick vid for other E39 peeps.   The battery issue is totally new to me also - It wasn't making sufficient contact between the post and the terminal. The terminal was bolted on tight, but the car wouldn't have power. After checking the battery with my multimeter I accidentally contacted the terminal and the battery post and the car got power. The battery was only a few years old and in good condition. I cleaned the post and the terminal with a wire brush, bolted it back on tight and never had the issue again. I'm still surprised that despite having solid contact it didn't work. Also, the car was getting Warragamba sized pools of water in the back when it rained. My initial concern was another rust problem. But when I went out on Weds while it was raining and while I had no headliner in I could see a steady stream of water coming through the roof mounted aerial. As this aerial is for the (now removed) car phone I pulled it out and whacked a blanking grommet in the hole. It seems fine now. I'm thinking I might get the hole permanently filled when the rust is fixed. Moving forward and things in progress; The tailgate needs some attention. I have taken all the trim off to clean it all and address some small rust spots. I have partially done all of this but I'll finish it up hopefully this weekend. As all the trim are now entirely devoid of trim clips I have bought a heap of strong velcro and I'm hoping it does a good enough job as any of this trim in good condition is super expensive and usually in Europe as we dont have many of the wagons here. Suspension and brakes!!! This is exciting. In the front; New control arms New sway bar links New lower Eibach springs (the only modification I'm planning on this car) M Sport shocks (these came with the car and will replace the longer shocks in the car) New top mounts Used 540i calipers (stock brakes suck!) New 540i disks and pads (22x296 mm for 528 and 30x334 mm for 540i) New front wheel bearings (thank all that is holy for bolt on bearings!) Annnnd in the back; New control arms New sway bar links Adjustable air suspension arms (fool the car into what the current height is so the self levelling suspension can match the new front ride height) New ball joints I'll also be doing a brake fluid flush while I'm in there. I'm planning on switching the car over to the 16's that came with it so I can clean up and respray the M Sport 17's. They've lost a lot of colour over the years and have some gutter rash. None of this will start until the E90 is back.
    • You mean you will regret it for drifting duties? I don't quite follow.
×
×
  • Create New...