problems after fitting rs2 airbox and 3"turboback

[220bhp]

I have just fitted an rs2 airbox, 3"downpipe and ss exhaust,now the boost is higher and its popping under load,the car is a 3b with rs2 turbo, em,injectors,044pump,and7a fpr, it was mapped by Minhea at MRC. It is due back there next week to be tweaked. I wondered if it could be fueling as it i now takeing in more air and getting rid of th gasses much quicker.
I am still running the stock IC but I cannot see this is anything to do with it
Before it was running max1.7boost,now it will go to 2bar,would fitting these items make that much differance or could I have disturbed something while fitting them.
Any help would be appricated.


LOU

[newsh]

The 3" DP will make a big diference, the reduction in back pressure means that the turbo spins up easier, less gas goes through the WG and boost goes higher, Mihnea will be able to tweek it back in. On my car I was getting boost creep with the 3" system meaning I was getting the boost climbing higher with rpms.. Just make sure though that all the tubes to the WGFV are connected properly with no leaks.

[Rocco]

I have just fitted an rs2 airbox, 3"downpipe and ss exhaust,now the boost is higher and its popping under load,the car is a 3b with rs2 turbo, em,injectors,044pump,and7a fpr, it was mapped by Minhea at MRC. It is due back there next week to be tweaked. I wondered if it could be fueling as it i now takeing in more air and getting rid of th gasses much quicker.
I am still running the stock IC but I cannot see this is anything to do with it
Before it was running max1.7boost,now it will go to 2bar,would fitting these items make that much differance or could I have disturbed something while fitting them.
Any help would be appricated.


LOU

99% the same setup like mine with oem 3B IC (for the moment)

do you have a dyno results to show it to us

[220bhp]

John, thanks for your advice,I will do as you suggest:
Rocco,I am at MRC next week and will let you know the results

[220bhp]

It is interesting that you run with the 3b IC Rocco, I wonder how many others run with this. How much of a restriction is this.As far as I can see the bigger the intercooler,the more lag you have,on the other hand the hotter the air is when it reaches the inlet the less affective it is on combustion, but dos this mean faster spool up but less top end ,or is this wrong.

[4WheelDrifter]

I agree with Newsh.

Go careful while the car is like that.

I don't think the 3B IC is restrictive, but an RS2 IC will help keep the IAT's down, keep torque/power up, and knock at bay. And I doubt you'll notice any extra lag. Whether anyone can quantify the gain, I don't know.

I would take the opportunity to find an RS2 IC, modify the cross-member to fit it, and get it remapped.

[220bhp]

Thanks for the advice Stu,I intend to fit a bigger intercooler ASAP but I dont think I will be able to sorce and fit one in time,Doug at MRC has booked me in for next Thursday,and I am very worried about driving the car with such high boost,so I am getting it mapped first and will fit a better intercooler at a latter date,I figure this is the safest opption,not sure if I will need yet another remap after fitting a bigger IC or not.

[s2_bo]

I highly recomend trying to get a bigger IC or canceling the remap Untill you have got hold of one.
If your paying for remapping each tine then it's really a waste of money untill everything is ready and this must be the bottle neck. Also how's your ignition system? Are you getting strong hop free spark to each cylinder?
And double check that n75 and pipework. If you want I can send you a spare to borrow with hose.

[Rusty]

Strange this as when I fitted a 3" DP etc. I saw no change in boost - afterall, the ECU controls the boost, it's not a dumb system like an old Cossie. It sounds to me like you've disturbed something at the same time. As above, any leaks or pinches in the N75 to WG pipework will cause the symptoms you are seeing as it's the boost that opens the WG, not a failsafe system. As this is all in the same area as you have been working, it seems too much of a coincidence that you're seeing these symptoms.

One thing you could do is disconnect the N75 plug, this should drop the boost to the spring setting, if it doesn't then you have a leak or pinch in the pipework.

[Rocco]

i am using the a rs2 replica front bumper...so the air enter better into the IC over the original S2 front bumper

RS2 IC it is a worth mod for sure and much more with 2.0bar boost

i got one and i will install it and next month i will go to the dyno again to see the changes on power and torque draws

go for it

[220bhp]

Thanks for the advise guys,the n75 was replaced by MRC at the first remap,plus the car has new dissy and leads ,this was all checked by mrc along with dissy, cam timeing and compression. Minhea could not get it to perform as well as he would of liked and put it down to a combination of both down pipe and airbox, we even tried it without the exhaust,[not a plesant expiriance].
I have not tried the car without the n75,but I will try as soon as it stops blooddy raining. It is not impossible that I have dissturbed something so I will check.Apart from that the nly other thing Idid was to clean the MAF.

[220bhp]

Found the problem,pipe from turbo to n75 of.

[newsh]

Yep, that'll do it