NismoPick

To reiterate from another thread: https://www.zdriver.com/forums/showt...highlight=sohc

The biggest issue w/ getting to 600hp is the cylinder head. It's a 38+ year old design. SOHC, 12 valves, intake & exhaust on the same side... it's just not an efficient head to flow a high hp application. There is a SUPER RARE DOHC head for the L-Series motor... which no one will likely ever get their hands on. The other option would be to cut some KA? heads and mount them on the block (someone did this on Hybridz)... which takes A LOT of time, knowledge, and money.

This is why I said 600hp isn't realistic. It's doable, but the hoops you'd have to jump through to make it worth while requires too much work and money (in my book).

snwbrderphat540

you ever see that KA DOHC setup? its like clamped together haha. he realyl shoulda produced them, and the RARE DOHC your thinking of was made by i think os giken and only sold in japan, you find one, and got 7K to spend then do it!. but yeah he should produce that DOHC KA setup, im sure it only cost him about around 1k to do (biggest problem would probably be the custom cam) and then just sell them for a grand over production cost, he would probably make ALOT of money cause im sure everyone and their mother would want one.

hoov100

DOHC L-series motors show up on yahoo auctions japan occasionally, as well as the cars they came from. people seem to forget just how common some of these "ultra-rare" parts are in japan.

snwbrderphat540

no, the problem is those DOHC ones are 2.0 L motors. wont work on the L6 from america

NismoPick

Yes... occasionally common. That's why they are so cheap and easy to find.

BlueKitsune

Very helpful info Nismo! Thanks!

BlueKitsune

Oh wow its page 2 already... and I didnt notice lol

KingDatsun1

If you have the money for this project, you should be talking to http://www.racetep.com/nissan.html

they are a well known company in the Z world, and specialize with this sort of stuff. there are also few others.



good luck with the project, I too love wangan midnight

BlueKitsune

*bookmarks* Sweet Thanks! Tho I actualy to do most of the work myself, body and all. tho help is nice lol

KingDatsun1

well they can tell you what you need, give you a full setup, parts etc etc. I call shotgun when you're done

NismoPick

Ah yes... Racetep has very sexy setups. Also Rebello (where all your hard earned $$$ goes bye-bye very fast).

260zturbo

lol its easy to convert a carb blow through setup to a efi setup. tap it for injector bungs and gut out the carb.. how hard is that?

BlueKitsune

Dude you pretty much just read my mind, I was thinking of that but then it hit me, where would I put the injectors and wires where they cant be seen?

And Thanks nismo! Yet again lol I've seen that site before.

Er lemme go get a pic of the car I want to put then engine in if I cant get another slicktop hard top w/e top you call it Z

snwbrderphat540

you can't hide injectors on any car or their wires. ????

BlueKitsune

Exactly.

Bleach

engine swap it!

RB26DETT

or

VQ35DE TT with only 18psi. You'll want to do some internal mods though.

VQ puts down 400whp at only 9spi but that's due to high compression.

duowing

VR38DETT there, you're done

BlueKitsune

Or What I want to do USE AN L ENGINE! IT just sounds funner to me. If I wanted easy HP I would have changed the engine but I want to use the L engine

hughdogz

I would love to see another high-HP L-series build, but...

Even if you have a 400 HP engine, how are you going to put the power to the ground? Even the stock Borg-Warner T5 will reliably hold only about 350 HP max.

My friend John Kurzals has 426 HP to the wheels on his 3.1? liter L28ET and he's using straight cut gears (I think it is a world class). Jeffp is using a Tremec or T56 or something like that, but those are huge and weigh a hell of a lot.

Also, you need a really strong clutch to hold it. Even a centerforce dual friction will only hold up to about 350 HP.

I would spend a lot of time porting the head, unshrouding the valves, 4/5 angle valve job, etc. since the head flow is a huge bottleneck...I'm shooting for a reliable 350-375 HP so I don't have to spend another $2k on a transmission upgrade.

BlueKitsune

I'm actually using a TKO Or a T5 WC with Gforce Gear set and case, And Im up for all the work needed as for the clutch I'll look around, Im sure I can find something

Bleach

well put your new $4000 paint job on first, $1800 for Wilwood brake upgrade, and new struts springs and wheels. That should be no big deal for you since you're rich.
An L-series build of this sort will cost four times what an engine swap would.

BlueKitsune

Not rich at all. I dont plan to do this over night you know. I'm actually selling a car of mine to help kick this off.

Its going to take a long time and It just feels like something fun to try. If I wanted cheap kicks Id get a different engine but I want an L-series engine.

See Im crazy lol

hughdogz

T5 Bellhousing and GForce Gear set and case...I think that's what Kurzal is using.

So you seriously spent ~$2k on a transmission in a car in that shape, with stock HP??

What does your car's transmission sound like this when you're driving around?

[Edit: Check out how loud these straight cut gears are: http://www.youtube.com/watch?v=Fgy9vc4rf90 ]

Bleach

Its fun to speculate and learn about engines but maybe you should put your goals into perspective.

BlueKitsune

Sorry. GOING to use that kinda of transmission.

And Bleach your probably right But Its worth a shot to me

HOLY CRAP Thats insane! There no way in hell Im using that kinda gearing!