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09-03-2010, 02:14 PM | #1 |
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headers design
I'm doing a poll about headers design, I like to have a list of different headers design and hopefully discuss the advantages and disadvantages of each designs
headers configuration 1. brand 2. model 3. flange or v-band design connecting to up pipe, if flanged how many bolts 4. type of gasket of flanged 5. inner diameter of primaries 6. inner diameter going to the up pipe 7. equal/unequal lenght or other configurations. 8. pics of the said headers 9. clearance with aftermarket oil pan if info is available 10. tube material and thickness if available 11. short review about installation, performance and durability if available 12. design flaw/weakness in your opinion thanks guys
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09-03-2010, 02:17 PM | #2 |
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here's mine
1. brand AMR 2. EL Race headers 3. 2 bolt with own UP gasket provided, it bolts with stock UP, in my case it bolts with the Crawford 35R kit UP 4. AMR's own gasket 5. 2in 6. 2.5in 7. equal lenght 8. 9. it clears my moroso oil pan 10. I don't know the thickness, i wish it was a bit thicker 11. installation is very difficult compared to oem exhaust manifold. performance is laggy but nice, my engine never run smoother than AMR EL Race headers installed . 12. weakness would be the POS UP gasket that came with it , the gasket blew up on me without really pushing my engine hard. that gasket is nowhere near the performance and durability of oem or grimmspeed gaskets. |
09-03-2010, 11:51 PM | #3 |
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^ Looks like a similar design to Perrins EL headers .. A bit more Burly tho
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09-04-2010, 10:03 AM | #4 | |
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Quote:
it looks like the Perrin indeed. do you know the size of the primaries of the Perrin headers? I read that Perrin cracks, I guess cracked headers is common. Killerb's headers design and material looks good but I'm sure it won't fit the Crawford up pipe. |
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09-04-2010, 10:36 AM | #5 |
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This is the tech works engineering header. I don't have one, just figure I'd contact them to see what it looks like since there aren't any pictures on their website. TWE told me it requires the use of a 2.5 oil pan.
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09-04-2010, 11:17 AM | #6 |
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Last edited by subbie03; 09-04-2010 at 03:07 PM. |
09-04-2010, 12:10 PM | #7 | |
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Quote:
wow the primaries are thick! I wonder if it will fit moroso oil pan and Kaminari Race brace. Having moroso oil pan and Kaminari Race brace limits my choices of headers. I wish Killerb made his oil pan way back March to April 2008 just before I bought moroso oil pan. |
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09-04-2010, 03:11 PM | #8 |
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The thickness is more or less around 5.09mm. Maybe if I pull the headers apart, I can measure the thickness where headers merge. I also updated the post by adding weight. The header weighed in at 16 pounds.
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09-04-2010, 04:50 PM | #9 |
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I have run 2 different headers since I took off my stock manifold.
First was a QuickTime Completely equal length header. Seemed to really let the engine breath along with sounding just like a DSM Main problem was it was weak and leaked like mad Second one is a Elcheapo off EBAY that Junior took a look at before I put it on. Thought the tubes were a bit small in diameter but I only have a 2.0 so it wouldn't hurt it to much? It is an EL Tri Y style so it has a completely different sound than the Quicktime. However it spooled in the 750 to 1000rpm range quicker than the QTP header Here it is mounted to show it clears a stock WRX pan no problem. It came with crappy looking gaskets but I already had some stockers so I used them. Along with a 2" EBAY up pipe that I got separate. Sorry I don't have more info on tube sizes at this point or any dyno sheets on the new header to prove a plus gain. It sound a lot different and spools way quicker, also both of these headers where feeding a old school FP Green on a 2.0 EJ207. QTP Header made 405 WHP 22 or 24 psi @4500rpm as I can't remember it was so long ago? No dyno on new header yet. Forgoy to add the new header let the Green hit 32 psi when the WG stuck. QTP 24psi was max it could make. |
09-04-2010, 05:38 PM | #10 |
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^^ how long you been running the ebay manifold? any cracks yet? ive been looking at it, the only thing i dont like is the flex joints, ive heard stories of the cheap ones blowing out.
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09-04-2010, 07:13 PM | #11 |
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Hard to say cause it is a secondary car but I put a 1000 or so miles on it before I had to stop driving it to do more modifications. Well that and try to get a JDM ECU to pass NJ inspection
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09-05-2010, 09:01 AM | #12 |
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09-06-2010, 06:58 AM | #13 |
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any info with Full-Race headers?
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10-17-2010, 07:13 AM | #14 |
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bump
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10-17-2010, 12:53 PM | #15 |
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1. brand: Covert Performance
2. model:Good question. Custom? 3. flange or v-band design connecting to up pipe, if flanged how many bolts: 3 bolt flange. 4. type of gasket if flanged: OEM at the 3 bolt to up pipe, Remflex in between the 3 bolt flange and the heads. 5. inner diameter of primaries: BIG 6. inner diameter going to the up pipe: BIG 7. equal/unequal lenght or other configurations: Equal Length 8. pics of the said headers: See below. 9. clearance with aftermarket oil pan if info is available: Not sure, still use the OEM pan, but there is plenty of clearance and don't see why it wouldn't clear after-market pans. 10. tube material and thickness if available:SCH40 11. short review about installation, performance and durability if available: Installation was a pain in the ass. Performance is TOP NOTCH. Gained a lot of hp/tq in the mid range area. Durability is also extremely good! 12. design flaw/weakness in your opinion: Heavy as hell! A little complicated taking on and off. 1 piece design provides no flex point, which is not good. |
10-18-2010, 12:18 PM | #16 |
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that looks extremely durable
thanks for sharing |
10-18-2010, 02:27 PM | #17 | |
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Quote:
Those values will really tell you what RPM (resonance) the manifold was tuned, based on second or third wave reflective value. |
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10-18-2010, 03:28 PM | #18 | |
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Quote:
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10-19-2010, 08:38 AM | #19 |
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do you still have the quicktime? it would be nice to start getting a bit of a database together. Calculations for the secondary is complicated for reflective values but is a good design feature. They make the combo less peaky and have a broader range.
think of them as having two spring rates together and hanging a given weight from them, it makes them progressive with a broader dampening range but you won't have that same peak loading point....maybe I just butchered the explanation Gas dynamics and springs; probably not the best comparison. |
10-19-2010, 09:09 AM | #20 |
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Yeah I still have the QTP header in the cellar. I can try to get the measurements and lengths of the tubes later if you want?
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10-19-2010, 09:12 AM | #21 |
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I'd love to know. Just try and measure as close to estimated centerline of the tube as you can...A single runner length from each bank can suffice. Just let me know which cylinder/runner it was and I can estimate the degrees of bend (effective tubing length).
Would be nice for the subie community to get smart and compile ACTUAL data |
10-19-2010, 12:59 PM | #22 |
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10-19-2010, 04:04 PM | #23 |
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yeah, something like that |
10-19-2010, 07:24 PM | #24 | |
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10-19-2010, 09:14 PM | #25 |
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I had that ebay header on my first remote mount turbo setup lasted me about 2 months and it cracked in 2 diffrent places. The material is paper thin and the welds are junk.
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