Supersprint Manifold

[talkingfish]

anybody got any experiences of this? good or bad? I've heard mixed reviews... if there are problems, what are they???

[richy]

anybody got any experiences of this? good or bad? I've heard mixed reviews... if there are problems, what are they???

a few ppl have had them snap around the head joints, ive personally had mine over 2 year now and no issues yet, they have a flexi section which joins to the cat/decat and can be over-tightened quite easy meaning no flex at all

mines a stainless steel one btw not mild

[speed]

i removed mine sat as it had cracked, mates welding it this week, and it looks to have been done before,

[speed]

http://i52.photobucket.com/albums/g30/speed_bucket/DSCF2620.jpg

http://i52.photobucket.com/albums/g30/speed_bucket/DSCF2622.jpg

http://i52.photobucket.com/albums/g30/speed_bucket/DSCF2621.jpg

i have the flexy too,

[16v_paddy]

I've not had any real issues with mine either and mine doesn't have a flexi bit in it

[speed]

i think mine is because the exhaust wasnt fitted proper,

[talkingfish]

any power gains?

[number1]

Tbh i was A little Disappointed with the power gain, but after a few days it started to feel quicker and pulls harder at the top over a valver manifold,

[flash]

yeah it will do.. ecu's take time to ajust to changes you make without a remap think of it as a learn feature

[Laine_16v]

yeah it will do.. ecu's take time to ajust to changes you make without a remap think of it as a learn feature

Horse tripe, tell me exactly what sensor the ecu uses to learn about an exhaust modification.

[stan]

:idea: Lambda :?:

[Evogone]

Fitted mine and was a lot crisper top end.....Sounds good too.. :D

[flash]

ecu doesnt adjust straight away...
if you dont notice gains straight away, disconnect your battery for a few minutes to reset the ECU
feel free to google about ecu learning

[summeh]

disconnect your battery for a few minutes to reset the ECU

hmm, this old chestnut again 8)

[flash]

ah crap.. have i dug something up i shouldn't have?? haha ... my bad :oops:

[Laine_16v]

:idea: Lambda :?:

Lol forgot about that, but putting a different manifold on isnt going to change the AFR composition and learn theres a new manifold there. Im a firm believer all this ECU reset is tripe.

[stan]

Of course it can change AFR.

e.g, if a manifold is tuned to give peak torque at 4000rpm, but the engine is calibrated for a mnaifold that gives peak torque at 3000rpm, the fuelling requirments wont be the same, as the VE curve defined by each manifold will be different. SO when you fit the "new" manifold, there will be leaning off around where its trying to make peak torque. The lambda sensor will detect this, and the ecu will try to adapt to suit.

Obviously if its running open loop lambda, then it cant/wont correct, but I bet there will be a certain ammount of correction through the MAP sensor due to different intake depression with the new VE curve.

[stan]

As for the re-setting, well ECU's have so-called KAM- Keep Alive Memory. I.e 12v is required to keep logged corrections. It follows if the 12v is disrputed for any length of time, this memory will be wiped.

So make of it what you will.

[richy]

As for the re-setting, well ECU's have so-called KAM- Keep Alive Memory. I.e 12v is required to keep logged corrections. It follows if the 12v is disrputed for any length of time, this memory will be wiped.

So make of it what you will.

yeah this is what we was always told at renault(by renault themselfs so make of that what you want lol)

the newer models ie 2001>> if you leave the battery disconnected for 3minutes or more then reconnect and re-insialize it resets the ecu to base settings as theres a limited ammount they can learn from the engine/driving style etc (as renault say..)

[talkingfish]

so would it be advisable to change the lambda at the same time as installing the manifold/downpipe?

[richy]

so would it be advisable to change the lambda at the same time as installing the manifold/downpipe?

no need to change it if its working fine

[MatBrown]

so would it be advisable to change the lambda at the same time as installing the manifold/downpipe?

no need to change it if its working fine

But good luck trying to get the old one out!


Mat.

[richy]

so would it be advisable to change the lambda at the same time as installing the manifold/downpipe?

no need to change it if its working fine

But good luck trying to get the old one out!


Mat.

very true! can be a utter ball ache lol

[talkingfish]

that's what I thought... a bit of a bugger trying to get the old one out....

[Coops]

new one can be had for around 50 quid off internet, bought a bosch for mine a few years back,so not the earth