This is my Nissan DOHC V8 for my 240 I'm building a Turbo manifold
for it but there oval I'd like to get this shape down in tubing to a nice transition so I can
boost this great V8.

 

take a flange and make a cad drawing of it. have someone machine the shape then split it in half, youd just put the tube in there and tighten it down till it made the shape

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by wantboost &raquo;</TD></TR><TR><TD CLASS="quote">take a flange and make a cad drawing of it. have someone machine the shape then split it in half, youd just put the tube in there and tighten it down till it made the shape</TD></TR></TABLE>

Thats what I dont want to do though.

I dont know but cant I just half cut two peices of tubing?

 

put some round tubing in a vice and squeeze it, it wont be perfect but it works.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by all_motor_mike &raquo;</TD></TR><TR><TD CLASS="quote">put some round tubing in a vice and squeeze it, it wont be perfect but it works.</TD></TR></TABLE>

I'm sensitive to hurting the flow so early .

 

you could have some pieces cnc machined that taper from the oval port to round tube

 

Like this guy... http://www.sdsefi.com/air12.html

Eh this is time consuming.

 

I think I'll just put them in a vice and crush them carefully.

unless someone has a better idea

 

Hydraulic press

 

v8 silvia?

 

yep.

for thinking outside of the box

 

i just brewd this up. its a pip cut in half and filled with a wedge piece. the design might not look so efficent but who knows.

 

yea, this was my idea.

 

Now get that machined out of stainless steel billet.

All eight of them.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Lam.N &raquo;</TD></TR><TR><TD CLASS="quote">
</TD></TR></TABLE>

That seems like the best option

btw you should post up picks when you get this project done. I have seen some v8 240s but none that have a turbo. Sounds like its going to be an amazing car.

 

Go with the vise method. If your careful, it will turn out fine and wont hurt flow at all. Get it to where it fits into the flange, then from the inside, tap it out until it is tight around the outer edge of the port hole in the flange. Weld it, and be done.
Kyle

 

you want something like this:


i know the champ car series cosworth v8's have manifolds that look similar to this but i'm not sure what method they use for them although i'd love to know!

 

Yes a Nissan V8 DOHC VH45DE, there special and this thing you can tell has massive potential. Stock Forge rods and crank six bolt mains + girdle, titanium valve springs, OEM coated pistons, variable cam timing, dual stage manifold, oem tubular headers, COP ignition, chain timing belt. its a 93 engine too



It has been done to the 240 before. The 300zx flywheel has the same 8 bolt pattern, also an adaptor plate is now being made for it.

I'm having rods & pistons made stock dimension stock compression + haltech and a journal bearing 4088r.


http://ellisautoworkz.com/cars/450sx/thumbs.php

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by k24em2 &raquo;</TD></TR><TR><TD CLASS="quote">Now get that machined out of stainless steel billet.

All eight of them.</TD></TR></TABLE>

i could do it on our 5 axis

 

The port on the head is 28mm tall and 54mm wide I'm really thinking about doing CNC peices.

 

we could do that no problem if we could get some downtime

 

i would keep the header tubes the same circumference as the ports.

 

I would have the whole flange cnc'd, oval on one side to a round on the other.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by MidShipCivic &raquo;</TD></TR><TR><TD CLASS="quote">The port on the head is 28mm tall and 54mm wide I'm really thinking about doing CNC peices.</TD></TR></TABLE>

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by KraZEtEggIE &raquo;</TD></TR><TR><TD CLASS="quote">i would keep the header tubes the same circumference as the ports. </TD></TR></TABLE>

I came up with 1.750 ID tubing as the same port circumferance.

 

wow i didnt know nissan made v8s..... except for the truck ones... but this one doesnt seem half bad... im looking into it im considering it for my kit car now....

i need to find out how much the engine weights though...