I'm designing a turbo manifold for a twin entry turbo (holset hx35). I'm trying to figure out what the correct paring should be. Someone told me that I should pair 1-3 into one scroll and 2-4 into the other. I've also read elsewhere that I should pair the runners so the pulses are as far away (in crank degrees) as possible... so 1-4, 2-3 are paired.

If #1 is on its exhaust stroke which cylinder is on the intake stroke? I'm guessing cylinder #2. It would make sense that those 2 cylinders should not be paired so the exhaust pulse does not interfere with the overlap of the other cylinders intake stroke.

 

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

If #1 is on its exhaust stroke which cylinder is on the intake stroke? I'm guessing cylinder #2. .</TD></TR></TABLE>


#2.

Not that I would put much faith into my advice on which cylinders to pair but I would think 1/4 and 3/2 sounds logical.

Nice little fab forum these guys got here huh. I find more useful info here than on the neon boards anymore..

 

You want to pair the cylinders that are 180 degrees apart which are 1-4 3-2 if your firing order is 1-3-4-2

It should look like
this little one that we did



If you have any other questions feel free to fire away!

By the way we can design the manifold for you using our in house devloped computer design program. The program has been used on many race cars such as ed bergenholtz etc. etc. lots of other ones are domestics and the weekend racers over 1800+ succesfully designed power making headers.

 

Mine's done the same way...

 

Ditto here. Tony I wish our(talons) junkers had all the room of that honda. That's a pimp manifold.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by ron@smp &raquo;</TD></TR><TR><TD CLASS="quote">Ditto here. Tony I wish our(talons) junkers had all the room of that honda. That's a pimp manifold.
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You're not kidding. Neon's have the exhaust on the back of the head so I have inches between the head and firewall. Not much room at all. I won't be able to make a really cool tri-Y setup or anyting like that. Probably a normal merge collector with a divider welded inside....

Thanks for the tips guys. Oh and I'd love to have a burns designed manifold but I'm prett poor (I'm drive a neon afterall) so I'll have to do the grunt work myself.

Tony, that manifold looks sweet. I'll be hitting you up early next year for some megasquirt EFI tuning.

Yeah KP... this forum rules....

 

I hear ya, I'm working on a t3 mani for a good friend with a GLH. I get depressed everytime I go work on it. The busa'a have more room for a turbo than the damn Omni does.

 

I've always done it 1-4 and 2-3.
That's the way to do it.

 

http://www.superchargeronline.com/im...l/DSCF0073.JPG

look at this.. this must be sequential pairing, just like long tri y on all motor..

why is that?????

 

Are you serious?

 

of course, just see the picture.
do u know the reason of that sequential pairing?

 

hahahahahahahahhahahahahahhahahhahahahahhahahahhah ahahahahhahah (gasp) hahahahahahahhahahahahhahahahhaa......

 

oh yeah, now theres a lazy guy that only know to type "H and A"

i know this thread has been death from 2004, but as the forum called TECH, you shouldnt sell your jokes here, this a type of manner wich starting the forum being a trash can.

i wrote this comment because im on way to fabricating my new twin scroll manifold for BWS366XL, for my 4 cyl engine (yeah its mitsubishi...... dont shoot me...!),
since it has the same firing order as honda so i ask it here, and papadakis car was a honda, and i actually playing lot with honda also.

and my old manifold was the same pair as him, but with no extension in 2nd primarry runner.

 

just pair them 1-4 2-3 and be done with it. that is how it works. think about when the cyl fire.