Hi,

Buddy and I are toying with playing with a Big Nitrous B20 setup as we are throwing around ideas for a header. We have no problem making one if we need to, and we are curious what you would recommend for a fully built B20 sleeves setup with atleast 250 shot multi stage nitrous setup.

What do you recommend for Header primaries, and a collector?

I was thinking atleast a 2.5" collector, but maybe even a little bigger due to the N20.

He is alreayd making 233 on the motor, so we hope to make atleast 450hp with the Nitrous setup.

 

Hi Marc,

I'm sure you know the basics.

I would thing a 3" collector and primaries 1.125" - 1.50"s. For length I would start at around 30".

I'm trying to picture the header design for a small V8. Of course you would only need one.

If your looking to make all the HP up top, may be go with a 1 5/8 tube.

Of course this is based on what I was taught back in my day.

Have you thought about running a tuneable pipe off the collector. Say a 15-18" long tube that you could shorten or lengthen for the best HP.

Also what about running twin primaries down the twin collectors with a H pipe?

 

The big V8 guys in my area told me this:

In order to get the best horsepower, run a long tube off of the collector and spray paint it. Then, see where the paint burns off. where the paint stops burning off, cut the pipe.

I dunno anything about it, that's just what I was told.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by 1992Si &raquo;</TD></TR><TR><TD CLASS="quote">Hi Marc,

I'm sure you know the basics.

I would thing a 3" collector and primaries 1.125" - 1.50"s. For length I would start at around 30".

I'm trying to picture the header design for a small V8. Of course you would only need one.

If your looking to make all the HP up top, may be go with a 1 5/8 tube.

Of course this is based on what I was taught back in my day.

Have you thought about running a tuneable pipe off the collector. Say a 15-18" long tube that you could shorten or lengthen for the best HP.

Also what about running twin primaries down the twin collectors with a H pipe?

</TD></TR></TABLE>

Not a header expert, but those sizes are definitely WAY too small on the diameter.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by tony1 &raquo;</TD></TR><TR><TD CLASS="quote">

Not a header expert, but those sizes are definitely WAY too small on the diameter. </TD></TR></TABLE>

Agreed

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Tippyman &raquo;</TD></TR><TR><TD CLASS="quote">The big V8 guys in my area told me this:

In order to get the best horsepower, run a long tube off of the collector and spray paint it. Then, see where the paint burns off. where the paint stops burning off, cut the pipe.

I dunno anything about it, that's just what I was told.</TD></TR></TABLE>

Yep now I remember that too.

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by tony1 &raquo;</TD></TR><TR><TD CLASS="quote">

Not a header expert, but those sizes are definitely WAY too small on the diameter. </TD></TR></TABLE>

Me either, but I figured we had to start some where. My old 340 had 1 5/8 primaries and had good mid range.

So Marc step it up to 2" primaries. Bigger for top end power.

How's that Tony?

 

You generally want to start with a primary at least the size of the exhaust port.

I think you're just building a big bomb with a 250 shot, so the header dimensions aren't too critical. lol

 

[QUOTE=tony1]You generally want to start with a primary at least the size of the exhaust port.

I think you're just building a big bomb with a 250 shot, so the header dimensions aren't too critical. lol[/QUOTE

to watching a nitrous motor go boom

 

I've always wondered if anyone would ever try to make a high compression, big shot Nitrous motor. The Pro Mod bike guys have been doing it for years. They basically take a Pro Stock Bike motor and run and a$$ load of nitrous to it. Some of the craziest things out there. If anyone could get it figured out, it would run like a raped ape. If you use something like this http://secure.mycart.net/catal...ext=1 you could probably do it. Give them a call, they could be a huge help to you.

 

250shot of nitrous should not be a bomb if tuning is correct, just like any other highhorse power combo!

 

HA HA.. Too Funny Building a bomb.

We have ran 170 shot in 2 stages in the past with no issues. I know Cubish (I think) was in the 250 shot range with his car.

My buddy Shant ran some retarded shots on his stock piston and rod setup in the past. I think he was getting close to 200 shot when he chucked a stock rod.

 

nitrous is gettin big these days. im going for 150shot soon.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Tippyman &raquo;</TD></TR><TR><TD CLASS="quote">The big V8 guys in my area told me this:

In order to get the best horsepower, run a long tube off of the collector and spray paint it. Then, see where the paint burns off. where the paint stops burning off, cut the pipe.

I dunno anything about it, that's just what I was told.</TD></TR></TABLE>

This was proved to be not true by some article I read not too long ago. I can't remember if it was Hot Rod or Engine Masters or even a Rehr Morrison article though off the top of my head.

 

1 3/4" into 2" then into 2.5" collector... 3" exhaust... collector size is crucial too big and you may lose power...

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by 1992Si &raquo;</TD></TR><TR><TD CLASS="quote">Hi Marc,

I would thing a 3" collector and primaries 1.125" - 1.50"s. For length I would start at around 30".

I'm trying to picture the header design for a small V8. Of course you would only need one.

If your looking to make all the HP up top, may be go with a 1 5/8 tube.

Of course this is based on what I was taught back in my day.

</TD></TR></TABLE>

i would say, go with 1.78" primaries & 3" collector.

i try that on my car and the time on my sign.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by njn63 &raquo;</TD></TR><TR><TD CLASS="quote">

This was proved to be not true by some article I read not too long ago. I can't remember if it was Hot Rod or Engine Masters or even a Rehr Morrison article though off the top of my head.</TD></TR></TABLE>

Yep. It was hotrod, I believe in 2003 or 2004. I know I have it sitting in my bathroom somewhere, next time I drop the load I'll find it and scan for ***** and giggles.

 

...pm


Modified by six sigma racing at 11:27 AM 1/31/2008

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by ciscoscivic &raquo;</TD></TR><TR><TD CLASS="quote">[QUOTE=tony1]You generally want to start with a primary at least the size of the exhaust port.

I think you're just building a big bomb with a 250 shot, so the header dimensions aren't too critical. lol[/QUOTE

to watching a nitrous motor go boom</TD></TR></TABLE>

why would it go boom... .V8's have been runnig BIG nitrous builds for MANY years.. and there have been a lot of honda's running nitrous safely. its all in the tuning.........
plus Nitrous is Fun!!!

 

Don't worry about it... it'll only go boom once.

Good Luck Marc

 

A 250 shot is not a bomb. I run a 120shot, problem free. As far as exhaust goes on a nitrous motor, IMO bigger is better. My car has a cheap header, and a powercore test pipe from now defunk and well deserving of it "Landspeed Racing"(Rotten F$%%#@' Crooks), w/ Thermal 3" cat back. That set-up works great for a 120 shot, I would want the header as large as possible if I was going for a 250 shot in the 1/4.

 

i have gone as much as maxing out 2 sports man direct port kits..which is about 320+ worth of nitrous..

im spraying a 160ish on my oem built gsr motor (stock b16 pistons) in my daily driver...makes 200hp on motor and 348 on spray

i went through a few head gaskets getting it to work on 13.6 to 1 compression but i figured it out...(this was about 4 years ago)...made 236 on motor..492 on spray, couldnt get it to hook on the dyno cause the nitrous hit so hard...car went 10.69@136 in spfwd trim...daily driven

few things i would do...
make sure u run c16
start low on the timing
advancing the cam gears alot usually loses a lot of power with the nitrous
run a 4-1 big tube header with a 3" collector
keep it simple...no need for crazy fuel setups to run 2 stages
use really cold plugs.. i used 9-10's
make sure your igintion system is up to par
...i can go on for a long time...lol

 

[QUOTE=tony1]You generally want to start with a primary at least the size of the exhaust port.

I think you're just building a big bomb with a 250 shot, so the header dimensions aren't too critical. lol[/QUOTE]

if your scared go home tony.....hahahahaha

 

bump and good luck with the build

 

Thanks for the support... It is a bit of a side project right now. No real rush!