Open Flash Header Discussion

[tracerit]

Originally Posted by 2much

I am not sure I know exactly which noise you are talking about. But I can say with both oft/ofh all I can hear is bassy rumble and air induction on the inside.

Man, I should've searched harder because I just found a huge thread discussing my question, but here it is along with videos detailing the noise.

http://www.ft86club.com/forums/showthread.php?t=59475

[steve99]

Originally Posted by tracerit

This is more of a general header question, but since I have the OFT already, I figured maybe complement it with the OFH. So with the OFT, I notice a raspy metallic noise at 4k which I've read has something to do with the timing to get rid of the torque dip. Someone mentioned that getting a header can address this metallic noise. So for users who have both the OFT + OFH, does it get rid of it entirely or is it just minimized?

The stock header is EL and many EL header tunes for stock or aftermarket el header will get the rasp noise around 4k rpm its to do with the agressive vvt chabges to minimise the torque dip with EL header on an NA car.

With uel header like ofh or other uel header, they are generally better in the low and midrange areas and the tune does not have to run the agressive vvt timing to reduce the torque dip, so with uel header and uel header tune you will not get the rasp around 4k rpm.

[JB86'd]

@2much he's referring to the stage 1 vvt noise at 4k rpm. @tracerit I've seen mentioned a couple times that the noise is gone with the stage 2 tune and OFH.

[2much]

Originally Posted by JB86'd

@2much he's referring to the stage 1 vvt noise at 4k rpm. @tracerit I've seen mentioned a couple times that the noise is gone with the stage 2 tune and OFH.

Yup. perhaps I dont hear it because I have the ofh now. However I was running a stage1 tune before I had the OFH and I can't specifically remember that sound... repressed memories maybe.

[ckim]

Originally Posted by ckim

Ordered mine today. Looking forward to getting it on the car.

Got mine on the car today and am happy with the OFH so far.

But, I'm having issues with my OFT. PLEASE HELP!!

- I had previously successfully used the OFT to flash the stage 1 tune.
- I purchased the OFH, so I uploaded the stage 2 UEL maps to the OFT.
- I had the OFH installed today.
- When I went to flash my car I received the following messages: "Tuning file mismatching. ECU write denied"; "Tuning file corrupted. Weird."
- When I plugged the OFT into my computer, when I try to read/write to the device I get the following message: "Error in opening the file."

I'm stuck. Please help. I can't delete the device because that requires that I write the stock rom back to my car. But I can't write the stock rom back to my car because I get the above "Tuning file mismatching." message.

Also, I've tried re-downloading OpenFlash Manager 1.16.0 and doing a clean install, but to no avail.

HELP!

Thanks.

- Charles

[ap5512]

Originally Posted by tracerit

This is more of a general header question, but since I have the OFT already, I figured maybe complement it with the OFH. So with the OFT, I notice a raspy metallic noise at 4k which I've read has something to do with the timing to get rid of the torque dip. Someone mentioned that getting a header can address this metallic noise. So for users who have both the OFT + OFH, does it get rid of it entirely or is it just minimized?

OFH is all about that bass, bout the bass, no rasp!

[steve99]

Originally Posted by ckim

Got mine on the car today and am happy with the OFH so far.

But, I'm having issues with my OFT. PLEASE HELP!!

- I had previously successfully used the OFT to flash the stage 1 tune.
- I purchased the OFH, so I uploaded the stage 2 UEL maps to the OFT.
- I had the OFH installed today.
- When I went to flash my car I received the following messages: "Tuning file mismatching. ECU write denied"; "Tuning file corrupted. Weird."
- When I plugged the OFT into my computer, when I try to read/write to the device I get the following message: "Error in opening the file."

I'm stuck. Please help. I can't delete the device because that requires that I write the stock rom back to my car. But I can't write the stock rom back to my car because I get the above "Tuning file mismatching." message.

Also, I've tried re-downloading OpenFlash Manager 1.16.0 and doing a clean install, but to no avail.

HELP!

Thanks.

- Charles

Try deleting all the tune files from oft also delete the mod file database file on oft. Then try loading tunes.

If still no go , ring the openflash guys they may be able to do a remote reset.

if still no

[tracerit]

I currently have a Perrin 2.5" resonated CBE and am looking to pair it up with the OpenFlash Header. For some reason I thought the OFH was catted but it doesn't seem to be. If I find my combo to be too loud, what options do I have to help quiet it down? I read that the OFT can tune the startup rpm down, would that be okay to do since the header is catless (but my other exhaust parts would still be stock)?

Also do people usually just ceramic coat the outside, or is coating inside a usual thing as well? I'm just going to be daily driving the car, would it be okay to just throw an adhesive heat shield barrier to the oil pan even?

[steve99]

Originally Posted by tracerit

I currently have a Perrin 2.5" resonated CBE and am looking to pair it up with the OpenFlash Header. For some reason I thought the OFH was catted but it doesn't seem to be. If I find my combo to be too loud, what options do I have to help quiet it down? I read that the OFT can tune the startup rpm down, would that be okay to do since the header is catless (but my other exhaust parts would still be stock)?

Also do people usually just ceramic coat the outside, or is coating inside a usual thing as well? I'm just going to be daily driving the car, would it be okay to just throw an adhesive heat shield barrier to the oil pan even?

Any catless header is going to be louder than stock. even hiflow catted ones will be a bit louder than stock.

if you still have stock secondary cat in midpipe it will robably be acceptable noise wise, but noise is very subjective and an individual prefernece.

If it too loud for you with perrin catback just put the stock catback back on, you could even sell the perrin, yes you might loose a couple of hp but i dont think you would notice.

i have ofh and hks legamax catback it not loud but my catback is quieter than perrin.

been running uncoated catless header with no heatshielding or coating 35-40 celcuis days as daily driver no issues on petrol or E85. Their is much more airflow arround header without the bulky heat shields of stock header. Catless header may even run a bit cooler than catted header dont know.

[ap5512]

Dammit, I'm getting new noises when I drive now. It's a popping/clunking type noise on cold starts while driving slow. I have it narrowed down to two things it could be:

1.) OFH has come loose again but I don't hear the fluttering noise I once used to. I retightened all bolts last weekend. I'm wondering if the bolts are coming loose everytime the car is driven?

2.) the sound is coming from my struts. I was trying to replace the springs on them but I couldn't get the top nut off so I left it alone. I tried not to spin the strut shaft but it turned a little bit but not sure if it was enough to render the strut faulty.

All in all, it hears and feels liek something is loose.

[victorb]

Might have a leak in between joints, it's not mandrel bent, they are connected via joints. More welds more prone to leaking. Good luck!

[ckim]

Originally Posted by tracerit

I currently have a Perrin 2.5" resonated CBE and am looking to pair it up with the OpenFlash Header. For some reason I thought the OFH was catted but it doesn't seem to be. If I find my combo to be too loud, what options do I have to help quiet it down? I read that the OFT can tune the startup rpm down, would that be okay to do since the header is catless (but my other exhaust parts would still be stock)?

Also do people usually just ceramic coat the outside, or is coating inside a usual thing as well? I'm just going to be daily driving the car, would it be okay to just throw an adhesive heat shield barrier to the oil pan even?

I have the Perrin 2.5" resonated CBE and OFH. I just had the OFH put on the car on Tuesday and to me as far as sound goes, it's just right. The Perrin is a relatively quiet CBE, so the OFH-Perrin combo isn't too loud.

Maybe I'll change my tune (no pun intended; I mean maybe I'll change my mind) after I'm done drooling over the deep, rumbly exhaust note, but I don't think so.

I'm impressed with how much a UEL header helps with the torque dip.

Cold start and idle.
[ame="http://www.youtube.com/watch?v=M47t54Yh_p8"]http://www.youtube.com/watch?v=M47t54Yh_p8[/ame]


Sound only. U-turn to bottom of 3rd.
[ame="http://www.youtube.com/watch?v=9gVkxn-Ksa8"]http://www.youtube.com/watch?v=9gVkxn-Ksa8[/ame]

[tracerit]

Originally Posted by ckim

I have the Perrin 2.5" resonated CBE and OFH. I just had the OFH put on the car on Tuesday and to me as far as sound goes, it's just right. The Perrin is a relatively quiet CBE, so the OFH-Perrin combo isn't too loud.

Maybe I'll change my tune (no pun intended; I mean maybe I'll change my mind) after I'm done drooling over the deep, rumbly exhaust note, but I don't think so.

I'm impressed with how much a UEL header helps with the torque dip.

Cold start and idle.


Sound only. U-turn to bottom of 3rd.

Thanks for the videos. That's not loud at all, nice deep tone to it. It's a go then, going to try to get in on the next shipment of OFH which seems to be next week.

[ap5512]

Has anyone had any issues with the header bolt/nut becoming loose. I am starting to hear noises again and trying to figure out if it's the strut or the header being loose again. If it's the nuts coming loose again, what can i do to make sure they don't come loose. The reason I think it's the header bolts is because well it's cold as hell outside so I'm wondering if the header heating up and then cooling down alot has any affect on the bolts coming loose so quicky..let me know your thoughts. Thanks.