Quote:
Originally Posted by oil pan 4
Have you thought about a ram air intake, putting a bigger turbo on, installing bigger intake piping or going with a straight pipe exhaust?
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Mkiv VW's have a bit of factory ram air.
Bigger turbo would only move BSFC curve up, the motor spends most of its time at low- moderate load and 1400-1900 rpm's. Would be fun, but most of the time that I make a boost request, I only want it for 3-7 seconds and a VNT-17 would make me need to downshift (maybe 2x) for the power I normally want.
I do have significantly larger turbo inlet piping (improved spool, tad bit less smoke at WOT). My TIP is from PD150, air box snorkel/ ram air bits are from Euro Dual Clutch R-32.
As far as boost side plumbing, I'm running a stock turbo outlet hose->1.8t pancake pipe (reduces spool a tad with larger volume, but reduces charge temps epically at cruise and allows a tad more high rpm power)-> Ebay stock size, but much higher mass and nicer fined inter cooler-> water / methanol injection (mostly to keep intake clean of EGR geww, but also quiets motor a bit at high power, drastically improves HP when heat soaked, and a tad more high RPM power with not much down side other than using crappy washer fluid up at 1.5x my normal rate) -> 99.5 upper charge pipe which relocates map much nearer intake and after the water/ methanol injection so I can keep a bit more timing from the corectly sensed intake air temp-> PD150 intake manifold (I've never run one before, but everyone loves them and my stocker was sheared off in the wreck.
My buddy runs a 3" straight pipe on his ALH, I'm not 100% sure, but we think he lost a mile or 2 to the gallon with it. Sounds pretty epic, reasonably quiet at idle/ cruise, not terrible at WOT, but sounds like a big single 2jzgte doing 100-150 pulls (except it is actually 30-60 pulls).
This car is for super comfortable highway cruising, so I'm running stock sized exaust with diesel Cat-> glass pack resonator -> factory giant 1.8t muffler. I'm expecting factory noise level, but hoping for lower.