Here's Header #3
"Pictures Deleted"

Header #2 for comparison

Ground Clearance for Header #2


I don't think header #3 will fit with a stock cross member but if it performs well I think I can make it fit since the 1/4 secondary that is too far forward now can be moved towards the block for added clearance, as shown in this picture.

"Pictures Deleted"


Hope to be testing very soon versus Header #2. Then Header #2 will be modified and retested against Header #3.



Modified by SMSP at 11:01 AM 8/3/2003

 

What are the tube diameters and the length of the primaries? What generation lude was built around?


[Modified by sharkcohen, 10:12 AM 12/27/2002]

 

Cool!

It's on a 4th gen.


[Modified by Variance, 4:43 AM 12/27/2002]

 

nice lookin header.
what numbers are you hoping to see as far as power gains and what about the price tag?

 

Hopefully sufficient.

It's built on a 4th gen but the cross members seem to be the same between the 4th and 5th so I don't think there will be a difference in the header. This header will NOT bolt up to the stock exhaust. It will have a 2-1/2" collector and most lkely utilize a donut/flex joint like most Hondas versus the standard flex tube of the Prelude.

As for power, header #2 made 184ish on a stock engine with only a CAI and a short race exhaust (2-1/2" tubing with a 18" resonator and a turn down). Header #2 didn't do as well as we would have hope for at VTEC xover so I hope this header will remedy that. So I'm hoping to at least equal header #2 in the top end and improve the mid range. If we get that, then I think I'll have something to go to production with.

 

 

"If we get that, then I think I'll have something to go to production with."

Yes! That's what I've been waiting to here!

 

That is ultra nice. Are there any options for bolting up to an exhaust? I guess the header would have to be routed to the stock cat location, as the underneath of Hondas only have the center tunnel as the exhaust route.

 

need a price for that header... as well as will a stainless steel version be availible and also since it will go into production will the cost be less than the previous version of the rumored 1000US ?????

 

i like both of those!!!!!! do yall have the specs on both?

 

 

I already asked him about specs, he's being fairly secretive. He won't say what the tube diameters or lengths are. Kinda discourages me from considering purchasing one.

 

he has worked hard on testing and research, he doesnt want people to steal his ****, i sure as hell wouldn't. Espescially not until it is fully tested and ready for production. Until that time comes you wouldnt even need to know that information anyways unless u are a spy

 

The numbers will speak for themselves. If the header makes good power who cares what size tubing and lengths he used?...it works so buy it.

 

yea make me a turbo manifold. ill so it off get your name out there.aha please

 

i would also like to see the runners from the head side of the flange. like looking into the tubes..

 

Price will be determined when the design is finalized.

They will probably all be stainless steel. The question will be if you want to spend the extra for stainless steel flanges versus cold rolled steel.

 

could you build a better version than the hotshot h22a racing header for an ek with more power thorough the powerband or that is very difficult ? So far that's the best header i've found "production"for my car...

 

Do you have any dyno graphs of the HotShot header? I'm using a 2-1/2" collector on my headers and not the 3" like HotShot.

Here's a graph of my 4-1 (header#1) red line and my 4-2-1 (header #2) blue line



This is on a stock H22A with just a CAI and race exhaust.

 

very nice my friend

 

meaning the 3" collector from hotshot is too big or unfair for your comparison ?

isn't a 4-1 header yeild more power up top than a 4-2-1 so why does you 4-1 header have less power everywheres' compared to the 4-2-1 sounds a bit fishy there ????

 

I think it's because both headers are so unrestrictive that it doesn't make a difference. The engine it was dyno'ed on is literally stock.

 

For a stock engine and even with mild mods I feel the 3" collector is too big, but then again I haven't tried it.

Actually, the my 4-1 kicked the 4-2-1 from 4900-5400, and thats what I'm trying to improve with this 3rd version.

4-1 vs 4-2-1 talk is usually filled with mis information. You just can't say that a 4-1 will have more top end than a 4-2-1, without knowing the design of the two headers. I can make a 4-2-1 with more top end when compared to a 4-1 and I can do it the other way around, and the same goes for low end power. I could probably make a 4-1 that would kick a 4-2-1's butt on the low end but it would be a dog up top.

Any header design is a compromise and don't let anyone tell you different. It's not hard to get improvements over stock but it is hard to get huge improvements over the entire engine rpm range. Some areas of the band will respond better with a certain type of header versus another. What Corey and I are trying to do is develop a header that is very good in the mid and top end. It will probably show some improvements in the low range but that isn't as important than the mid and high areas. If the low end power was very important to you all, you'd be driving V8s or turbo diesels.

So the design constraints I'm working around are

1. Keeping P/S
2. Keeping A/C
3. No mod to the cross member or very very little
4. Very good improvements in the mid to top end with smooth power delivery
5. Maintaining near stock ground clearance
6. A 2 piece design may be in the future but probably won't happen right away unless it turns out to be an easy thing to incorporate.
7. No concern for where the collector ends, it will be a 2-1/2" collector so some modification will be needed to the B pipe any way.
8. Stainless steel construction........most likely


[Modified by SMSP, 7:56 PM 12/28/2002]

 

ok, if i requested a 4-1 header that gained in midrange and top end, without worries for the front mount, ground clearances similiar to hotshot and about the same spacing from the block to the front radiator support in ek chassis could you build a better version of it that would yeild more power than the hotshot header, i would pay to have one made, i would gladly dyno test it fully and send you the results... because there is alot of us h22 civics around that are looking for upgraded headers.. heck i'd be more than willing to send you information, mind you my motor is not stock what so ever.....

looking for power 4k-9k anything lower i'll rarely see just in town, where i don't need much the rest is for the track anyways....

let me know if this intersts you if you need a down deposit let me know how much...

-H

 

Do you only want a 4-1? One of the problems with the H22 is the oil pan. There is very little room to stack tubes in there and therefore 4-1s are really bad in the ground clearance department.

Here's a pic of one of my LS/VTEC headers.




But even this configuration can't be utilized for the H22 in a Prelude when larger primaries are used since there isn't enough room due to the front to rear support. Now your set up maybe different.

But if the power can be made with a 4-2-1 (like header #3) in the rpm band you what and then get better ground clearance on top of that, wouldn't that be a win win?

If your engine is highly modded then the size of the primaries of header #3 that I'm currently developing may not even be large enough. That's why I offer different headers for the B16, B18, and B20 engines. Each engine needs something different.

My H22 headers have not been tested against the Hotshot header so I can't answer that question of yours.