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Twin cam head for the L6 from Derek at Datsunworks


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On 6/6/2021 at 4:04 AM, Derek said:

The only footage other than my car and 005 is the dyno pull that ZCC did.

https://www.instagram.com/p/CMKqD5BHwrr/

 

Holy MOLY. I thought I was going to be able to live without one of these heads, but now I'm looking around for stuff to sell on eBay. Sheesh! Thanks a lot, Derek! 🥴

I think I asked before, but it sounds like nobody has done any forced induction yet? I'd be damn curious to see what a stock bottom end with a nice modern turbo could push through that head.

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This is all Tony D’s fault:)   Hi everyone. Some of you know me from my  DIY EFI manifold project http://forums.hybridz.org/topic/63445-making-my-own-efi-intake-the-first-casting/ &#

Machine work finished!   I can relax a little:) Just got done with their first bath. Still need de-buring and edge finishing but the majority of the work is done.    

Ready for battle!       Getting geared up to start machining the heads. Officially the first production run.    

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Posted (edited)
7 minutes ago, Ineptitude01 said:

I'm looking around for stuff to sell on eBay. Sheesh! Thanks a lot, Derek! 

 I told you guys before don't blame me blame Tony D. I think that has a nice ring to it.  Like an orange juice commercial. 

 

7 minutes ago, Ineptitude01 said:

I think I asked before, but it sounds like nobody has done any forced induction yet?

Not yet. It's a pretty pricy head to blowup. 

Edited by Derek
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Posted (edited)
4 hours ago, Derek said:

 I told you guys before don't blame me blame Tony D. I think that has a nice ring to it.  Like an orange juice commercial. 

 

Not yet. It's a pretty pricy head to blowup. 


Yeah I think your bang-for-the-buck on this head is NA. Once you are going forced induction, you can boost more to overcompensate the shitty flowing L heads. Clearly the DOHC will make more power at less boost, but I think the sexy factor is making big power in an NA application for road racing. Just my opinion :)

Edited by AydinZ71
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42 minutes ago, AydinZ71 said:

Clearly the DOHC will make more power at less boost, but I think the sexy factor is making big power in an NA application for road racing.

 

What class of road racing?

 

As far as I can see, a head like this isn't legal in any class where it would be competitive.

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38 minutes ago, HS30-H said:

As far as I can see, a head like this isn't legal in any class where it would be competitive.

 

Is there a class it could even run in at all? If so how much horse power would it need to put out to be competitive? I'm not into road racing so I have no clue.

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4 hours ago, HS30-H said:

 

What class of road racing?

 

As far as I can see, a head like this isn't legal in any class where it would be competitive.


True :) At least not in SCCA. Can’t run it in ITS, EP. 

 

Not sure about the rules in Vintage racing. I have always had trouble finding the comprehensive rules for that.

 

Still, I believe there are some exhibition track days, hill climb, time attack, etc. 

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3 hours ago, Derek said:

 

Is there a class it could even run in at all? If so how much horse power would it need to put out to be competitive? I'm not into road racing so I have no clue.


@HS30-H is right. You wouldn’t be able to run this head on any of the classes in SCCA that run in “nationals”. Still, there are other regional road racing and vintage series races that have looser rules. More on the exhibition side, without a trophy 😂

 

Even for exhibition racing, the “cool” factor of running a DOHC L-series would get a lot of attention. 
 

HP needs would depend on the track, but given EP runs an L24 w/ SU’s, I think you will have plenty of power! The EP L24’s are in the 230-260hp range, but the torque band is limited to the higher RPM’s and typically run a redline 8-8.5k. No expert here, just spent a lot of time asking question from those who are. 
 

What I would be most excited about with this head is the potential for a broader torque band, and higher peak torque. The valvetrain will need to be super stable to run those high RPM’s though. You could test it on a block with pauter rods and forged pistons with valve reliefs, if you were interested in “stress testing” the head well past the OEM redline. 

 

 

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17 hours ago, Derek said:

 

Is there a class it could even run in at all? If so how much horse power would it need to put out to be competitive? I'm not into road racing so I have no clue.

I don't know about being competitive, but it can run in the NASA Super Touring classes.  It's all about power to weight with brakes and suspension pretty much wide open.  I imagine it would compete in ST2 or possibly ST1 depending how much wheel horsepower it's putting down.  Time Trials run the same rules and I currently run TT3 in my 2014 SS Camaro, mostly at Sebring but I was just at Daytona a little over a week ago.  It's a fun group and they are nation wide.

 

Here is the form, it's stupid simple.  Classification Form

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