Running 3.4" pulley feedback

[denglish318ti]

Just thought I would give my feedback on running the 3.4" pulley on my DASC with meth injection and standard RRFPR.

Took it on a track day, ran it for the whole day, it got a bit warm and the needle left the middle of the gauge, never did this with the standard pulley. It was fairly cold weather.

Ran it on another trackday and it was hot and it felt quite lumpy accelerating, went back to the larger pulley and it was probably pulling just as hard.

Conclusion is that the 3.4" would be good on the road where you are only going to use the power for about 30 seconds at a time, but on track where you are out for 20 minutes then the heat gets too much and the timing gets pulled (even with meth injection).

Answer is to get it properly mapped with some bigger injectors, but at around £550 to do this I am not too keen!

[slow_ti]

You m44?


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[setho1993]

Are you running stock injectors as well?

[JP422]

Sorry if I missed this somewhere... but for a 3.4" pulley, can you use the same belt as a stock DASC pulley?

I just ordered my 3.4 and wondering if I should buy a new belt too.

Also, are you running stock DASC fuel setup? with the RRFPR?

Thanks!~
-Joe

[denglish318ti]

Yeah, stock RRFPR, stock injectors, M44

You can use the same belt as the auto tensioner will take up the excess slack, although it might then start to slip. Best to give it a go and see what happens.

[xxxJohnBoyxxx]

Originally Posted by JP422

Sorry if I missed this somewhere... but for a 3.4" pulley, can you use the same belt as a stock DASC pulley?

I just ordered my 3.4 and wondering if I should buy a new belt too.

Also, are you running stock DASC fuel setup? with the RRFPR?

Thanks!~
-Joe

I've run down to a 2.8" pulley with the stock belt on a M44. No slip, turning the S/C 15,000rpm and 15psi of boost on a stroker Metric motor

[JP422]

Thanks guys... sending my ECU to NickG today.. and Pulley arrived last night


Johnboy... you always put a big grin on my face.. haha. If only it was easier to tune and build cars in Cali... I'm so fed up with CA's smog laws and such. My other car is a fully built A4 1.8t on standalone and such, but it's SO expensive to keep it registered... if ya know what I mean. That's why this Z3 MUST be smog passable... Might have to sell the Audi too.

Well... let's see how she runs (on 91 pump at that)...

[m44lee]

i also run the 3.4 pulley on mine and although i dont track it i've had no dramas at all with heat etc
it probably helps that here i use 99 octane fuel aswell
still on the stock map etc at the moment but it will be getting mapped pretty soon!
(wish i had the option of taking it off the road and sending my ecu to nick myself but its my daily!)