Are the Exige S/240/Elise Supercharged header equipped with bigger piping than NA's?

[Noel]

That rusty manifold zuoom posted are not the ones that came out of the Lotus. Below came out from the Exige 240R. The 2ZZ-GE supplied by Toyota for Lotus has the extra useless EGR valve.





Inside Diameter - 34mm
Outside Diameter - 37mm

These dimensions are way too small.

[Trendy Exige]

Unfortunately, the Larini, 2bular, and PPE's header would not be applicable with my setup since the layout of these header are too long for my Arqray sport cat. I really love my Arqray setup so I will not sacrifice just so I can have an upgrade header. However, these are fantastic options for those who are running the above mentioned brands in retrospect.

Personally I find the Weapon R shorty header design to be dated, but it would work for my car. The design were made for naturally aspirated Celicas so I'm not too thrilled about them.

I got an email from Trial Japan and they said the diameter of the piping on the primaries are 47.5mm so it seems that the pipungs are much bigger but on the NA Exige is only 3.8ps, which is hardly significant enough to compel me to purchase them either.

I'm still stump and it looks like I'm going to have to wait for some other company that can meet my demand.

Originally Posted by GTsRasta

Don't waste your money on the overpriced Trial header from kinwaymotorsports. For the gains you can get with the money:

$155 Boosted2.0 Ported Stock Header Service (keeps stock cat)
$505 shipped Weapon R Race Header (cat delete)
$1100+ PPE Race Header (High Flow Cat Optional)

Pick how much gains you want to see for your price range, and if you want to be green or not.

[Trendy Exige]

Thanks for sharing this information with us Noel. I find this to be very useful because now we have a base to compare with the aftermarket header.

Originally Posted by Noel

That rusty manifold zuoom posted are not the ones that came out of the Lotus. Below came out from the Exige 240R. The 2ZZ-GE supplied by Toyota for Lotus has the extra useless EGR valve.





Inside Diameter - 34mm
Outside Diameter - 37mm

These dimensions are way too small.

[Noel]

Mate, you didn't click on the link to Aussie Elises which I provided earlier eh?



The above SUS304 exhaust manifold + metal catalytic converter was designed specifically for the SC Exige and will bolt-up to your Arquay muffler. Don't worry about the Arquay catalytic, the Saclam exhaust manifold + metal catalytic converter is a more recent/well engineered product. In fact, the Saclam setup is second to none worldwide along with it's premium pricetag.

[321freeflow]

There's no doubt the std offering is too small for the Supercharged cars - I'd say it's too small for the n/a motor too!
Here's a pic showing the std header alongside the 2bular std and the 2bular big-bore (for 300+ outputs - brave).
Apart from the obvious increase in bore size THE most important design feature on the 2bular(s) is the proper flexy section - absolutely essential IMO. To fit a spring-loaded joint on the n/a cars is bad enough but to continue its use on the Supercharged motors is unforgiveable. It's cheap and nasty. There's waaaay too much engine movement for that component to withstand the stresses.

btw the std 2bular header weighs the same as the Lotus offering. The big-bore is 1lb heavier.

[Trendy Exige]

Noel,

Yes I did in fact clicked on the link you provided. Judging on the pictures alone, I can see 2 possible problems I would be encountering.

First, the primary 02 sensor that comes before the catalytic, the wiring cannot reach that far unless some modification is expected. Perhaps on the right hand drive Exige S is different which I don't know about. I know mine won't.

Second, it seems like in the picture the catalytic convertor is welded to the muffler and the only flange where it meets with the gasket and the exhaust manifold's collector is where the spring loaded bolts are located.

Again, I'm only basing this on a single picture. There is too little information to go with even with the English translation on the other link.

Whoever owns this Saclam exhaust manifold setup perhaps can fill us in more about it when it's installed on their forced induction Lotus.

Originally Posted by Noel

Mate, you didn't click on the link to Aussie Elises which I provided earlier eh?



The above SUS304 exhaust manifold + metal catalytic converter was designed specifically for the SC Exige and will bolt-up to your Arquay muffler. Don't worry about the Arquay catalytic, the Saclam exhaust manifold + metal catalytic converter is a more recent/well engineered product. In fact, the Saclam setup is second to none worldwide along with it's premium pricetag.

[Noel]

Heh, catalytic converter is not welded to the muffler, it's a 3 piece setup for a full exhaust system like with every setup.

As for the 2 02 sensors, one pre-cat / one post-cat, the wiring is long enough if you remove it completely and run it how you need it to go. One is longer than the other.

[shay2nak]

Originally Posted by 321freeflow

There's no doubt the std offering is too small for the Supercharged cars - I'd say it's too small for the n/a motor too!
Here's a pic showing the std header alongside the 2bular std and the 2bular big-bore (for 300+ outputs - brave).
Apart from the obvious increase in bore size THE most important design feature on the 2bular(s) is the proper flexy section - absolutely essential IMO. To fit a spring-loaded joint on the n/a cars is bad enough but to continue its use on the Supercharged motors is unforgiveable. It's cheap and nasty. There's waaaay too much engine movement for that component to withstand the stresses.

btw the std 2bular header weighs the same as the Lotus offering. The big-bore is 1lb heavier.

Jim,
what's the price of the std 2bular header and the "big bore" header? What's the pipe diameter of each one?

[GTsRasta]

If the exhaust sound/setup is what's keeping you away from the PPE race header and making optimum power out of your 2zz powered vehicle...then so be it. All I know is that Dave here changed out his exhaust to a different brand, and is running the PPE Race Header (SC version) with a 3.2" pulley and a standalone ECU tune, and is making 248 whp, without even touching water injection yet.

But if keeping your exhaust setup is what you want so bad, you can't beat the $155 Boosted2.0 stock ported header service. Why not go with proven gains? Are you even going to purchase a programmable ECU or get a custom reflash to take advantage of the larger primaries from the Trial/TRD/Non-existent shorty header you want?

[KeepItClear]

Originally Posted by shay2nak

Jim,
what's the price of the std 2bular header and the "big bore" header? What's the pipe diameter of each one?

+1 I wonder if the 2bular header will fit my larini de-cat instead of their 2bular one?? anyone think so?

[KeepItClear]

anyone installed the standard 2bular header?

[Trendy Exige]

Its not the exhaust note/sounds thats keeping me away from the PPE Headers. The only way I can use the PPE headers is if I get rid of my Arqray sport car. Since I am located in the Southern California, local police and state highway patrol men are harsh on cracking down vehicles without a catalytic converter. The Arqray Sport Cat looks more closely to a stock cat than any other cat thats applicable on the Lotus that bolts straight on.

As I mentioned earlier about the boosted 2.0 headers porting service, I find the performance gain to be trivial. Clearing out diameter of the primary pipes can only gain so much, and I don't believe it will gain as significantly its shown on the results it provided. To me its no different than boring out the chamber in my throttle body. Perhaps a little air flow, but not by much. Its not what I am looking for. But it may be for others.

Originally Posted by GTsRasta

If the exhaust sound/setup is what's keeping you away from the PPE race header and making optimum power out of your 2zz powered vehicle...then so be it. All I know is that Dave here changed out his exhaust to a different brand, and is running the PPE Race Header (SC version) with a 3.2" pulley and a standalone ECU tune, and is making 248 whp, without even touching water injection yet.

But if keeping your exhaust setup is what you want so bad, you can't beat the $155 Boosted2.0 stock ported header service. Why not go with proven gains? Are you even going to purchase a programmable ECU or get a custom reflash to take advantage of the larger primaries from the Trial/TRD/Non-existent shorty header you want?

[GTsRasta]

Originally Posted by Trendy Exige

As I mentioned earlier about the boosted 2.0 headers porting service, I find the performance gain to be trivial. Clearing out diameter of the primary pipes can only gain so much, and I don't believe it will gain as significantly its shown on the results it provided. To me its no different than boring out the chamber in my throttle body. Perhaps a little air flow, but not by much. Its not what I am looking for. But it may be for others.

You haven't done your research, but suite yourself. All I know is that this guy went from 181 whp NA to 175 whp NA on a Hydra standalone EMS dyno tune after switching out from the Boosted2.0 ported header to the low-midrange oriented (catless) Weapon R race header that's also available (also only catless) for your cars as well.

2zz WR Race Header Results - NewCelica.org Forum

For a ported stock header WITH THE STOCK CAT to outperform a dedicated catless race header on the top end speaks enough for what it delivers. Unless Forcedfed comes out with their shorty header design, or you convince a vendor to start a group buy for the discontinued weapon r shorty header design, the product you want doesn't exist...unless you're willing to spend $800 - $1,175 for the overpriced TRD and Trial JDM 2zz shorty headers kinwaymotorsports offers:

KINWAY MOTORSPORTS - TRD Performance Parts and Accessories for Sport Motors

I don't think I'll ever move to Cali...

[GTsRasta]

I'm sure you've seen this, but just to show others:

http://www.newcelica.org/forums/showthread.php?t=204266

Originally Posted by Boosted2.0

Flowbench Testing on GTS headers to date indicates over a 10% gain in flow from this operation. (These results will be updated if they change as test sample sizes increase). Increases may be slightly larger or smaller in some cases depending on the quality of the initial factory weld at the collector.
Total Header Increases were tested at (stock) 750 CFM average at 28" vacuum to (ported) 796 CFM average at 28" vacuum.
Individual runner flow increase is equally significant - from (stock) 205 CFM average at 28" vacuum to (ported) 236 CFM average at 28" Vacuum



GTS header porting (I don't want to give away all my secrets, but heres enough to give you the gist of what I do)

Ported Inlet


Ported Collector:


Dyno gains will vary in accordance with other mods to your vehicle. The only dyno available so far is on a 2003 GTS with stock ECU, AEM CAI, and TRD Exhaust. As you will see below there were gains of over 10 WHP and 10 WTQ at various points in the power band. It is our belief that with a more freely breathing setup significant gains would have prevailed throughout the entire RPM range.

Click Here to view Swing Fixer's comparison Dyno

Click Here to view Klutch's comparison Dyno

Still not satisfied, even with the flowbench verification? If you end up with a aftermarket shorty header with bigger primaries for your supercharger setup, I hope you will use a programmable ECU to take advantage of them.

[Trendy Exige]

Yeah, you'll kick yourself if you move to Cali if you have a hard time accepting the whole strict smog issue. If you read below my avatar, you'll see that Cali is where the CARB is. There is check points for sniffers on the highway and the officers are now trained to distinguish between OEM parts and aftermarket parts. I"m not surprised, since the trend of modifying import cars derived from the golden state.

I have given careful thought about the Trial Headers and I read up on what you said. I have concluded not to go with it. Weapon R is great for Nissan Sentra's and other cars, but its too dated. Its an old design. I'm sure someone is going to make a big diameter piping for forced induction header. Hopefully its not made of mild steel, instead be a stainless steel or titanium material.

Bigger bore throttle body and porting stock headers, I've done in the past because like you said, its not costly. More air flow through the inlet chamber, however it doesn't increase hp gain worth noting. Furthermore, I'm basing this on my experience with my other cars like the Nsx and Supra.

Originally Posted by GTsRasta

You haven't done your research, but suite yourself. All I know is that this guy went from 181 whp NA to 175 whp NA on a Hydra standalone EMS dyno tune after switching out from the Boosted2.0 ported header to the low-midrange oriented (catless) Weapon R race header that's also available (also only catless) for your cars as well.

2zz WR Race Header Results - NewCelica.org Forum

For a ported stock header WITH THE STOCK CAT to outperform a dedicated catless race header on the top end speaks enough for what it delivers. Unless Forcedfed comes out with their shorty header design, or you convince a vendor to start a group buy for the discontinued weapon r shorty header design, the product you want doesn't exist...unless you're willing to spend $800 - $1,175 for the overpriced TRD and Trial JDM 2zz shorty headers kinwaymotorsports offers:

KINWAY MOTORSPORTS - TRD Performance Parts and Accessories for Sport Motors

I don't think I'll ever move to Cali...

[FLuXeXigeS]

if done right i think porting the OEM headers might just work, in both cost and performance

to be honest a lot of stuff out there is WAYYY over priced anyway

when im ready i might give that a shot along with a sport cat that doesnt throw any CEL LOL