Jump to content
SAU Community

Recommended Posts

I did plan to measure the combustion chamber on the de neo head but simply forgot, i would expect them to cc the same as det neo.

I used the runners from det neo with a plazmaman intake, only because i already had it setup on a built motor in the car previously 

  • Like 1
8 minutes ago, Dil-Dog said:

@NEO25T did a CNC machine do that?

Nah this was full budget this time round i just opened them up with die grinder, no machining done at all. I just cleaned and measured everything, light hone on the block, cleaned everything again, and again, slapped in some valve stem seals and threw it together.

  • Like 1

@NEO25T wow bro that is really beautiful,  so did a cnc machine "port" your head to the bigger DET holes? what coil packs are you running? is that timing belt cover from a series 2, because it looks like the steel ones and not the plastic NEO ones? and LASTLY, for you catch can, what the fittings you used to fit in the standard holes in the valve covers? i know its AN but can you explain how you made it work, i would like to do the same as well

 

6 hours ago, Dil-Dog said:

@NEO25T wow bro that is really beautiful,  so did a cnc machine "port" your head to the bigger DET holes? what coil packs are you running? is that timing belt cover from a series 2, because it looks like the steel ones and not the plastic NEO ones? and LASTLY, for you catch can, what the fittings you used to fit in the standard holes in the valve covers? i know its AN but can you explain how you made it work, i would like to do the same as well

 

Nah it was all done by hand with die grinder, just traced the gasket. I didnt take many pics but started by knife edging the divider then slightly open the bowls to same size as the seats, smoothed the radius of the short turn and slightly opened the ports to same size as det head then just blended it out to the marks from the gasket, i dont think id like to see any flow bench results lol.

Those are r35gtr coils from prp.

Yeah its just a cover from a hydro 25 as i dont like the look of the neo ones, rb20 cam covers on it too.

I did weld fittings in the cam covers on the other motor but these ones um i forget.....

I think those are the standard nissan ones i cut and welded with -12 fittings, you can get them push in to an but the ones i seen were straight so you had to put a 90 degree hose fitting and they stuck up and i didn't like how it looked, ill take a pic if i remember in the next day or 2

  • Thanks 1
  • 3 weeks later...
  • 4 months later...

Just an update for future readers and any one else who may be able to learn from this or wanna do the same.... it works, i put manely h beams and cp turbo neo pistons with acl bearings with no problems. The head cc/size is the same. It is possible to forge a de with det parts 

  • Like 1
  • 6 months later...

Hey all I’m just in the process of building another rb25de neo engine for my car as my current engine didn’t seem to want to make more than 300rwkw but made good midrange 250 at 4000rpm. I’m wondering if u have a before and after Dyno sheet I’m looking to do a freedy intake polished ports , h beam rods, port and polish head and polished chambers, det cams, ARP studs and aim for 370 to 400 I may have to do pistons but can’t find info on max power from a stock piston motor

45 minutes ago, X Drifter said:

Hey all I’m just in the process of building another rb25de neo engine for my car as my current engine didn’t seem to want to make more than 300rwkw but made good midrange 250 at 4000rpm. I’m wondering if u have a before and after Dyno sheet I’m looking to do a freedy intake polished ports , h beam rods, port and polish head and polished chambers, det cams, ARP studs and aim for 370 to 400 I may have to do pistons but can’t find info on max power from a stock piston motor

Why though? Get a different turbo

Well, the DE ports are small, so they will become a restriction on max power long before they would on a DET head. It's not surprising that you start to hit a wall.

Your options are to use a DET head or spend some time/money in digging the extra metal out of the ports. I know which would be easier!

Freddy intake is neither here nor there as far as power is concerned. You will make the power just as easily with a stock plenum. So if you're planning to change it for power reasons, spend the money elsewhere.

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

    • I can see between the water jacket and cyl 3 there wasn't a hard line of combustion gas. It certainly appears that the issue is coming from there. Yes, checked the tension. All at 100ft lbs where I set them 5 years ago. These blocks can crack but generally when they have been over bored. Mine is only 0.5mm oversize at 89.5mm. They break between cylinders around the 91mm mark. No sign of that with mine. My gut feeling is the head gasket lifted a while back when the studs stretched and i bandaided it by retorquing the studs. It's finally let go.
    • My Nismo 1.5 churps a bit on reverse turns when cold, but besides that feels like a stock diff.
    • Yes, but, I paid cash and I'm pretty sure the receipt was in the bin 10 minutes after I got home Note to self, keep all receipts
    • Bunnings would have just handed you your money back on that one!
    • So, version 4 intake is on its way I was looking at these a while ago but at around $200 or more it was a little pricey for something that might not work, but, I had it in my watch list, but, I got a message saying it was on special, and I had a code thingie to use, it eventually came in at $120 delivered, so BAM, BUY NOW.....LOL I'll need to have a look when it arrives but I feel it will "look" better than what I currently have, as it comes with a PCV fitting, so I will be able to get rid of the alloy pipe that goes to the throttle body with the PCV fitting  Well, that's what the voices in my head are telling me  Oh, and this happened today Yeap, it was a Trojan, and it was cheap, so I headed back to the hardware store and actually spent a little bit more on a heavy duty,  one that was actually recommended by a plumber mate, a Cyclone one with a fibreglass handle that is actually rated for clay The broken shovel will eventually be "modified" into a short handle shovel
×
×
  • Create New...