Noz Posted January 10, 2012 Share Posted January 10, 2012 I know a few guys are running turbo trumpets, was just wondering if running no air filter actually increases HP. Clearly restriction on air flow will be less, helping the turbo spool, but will it help the power output? Quote Link to comment Share on other sites More sharing options...
stevie_b Posted January 10, 2012 Share Posted January 10, 2012 (edited) I imagine it would increase it by a bit. Edit: you'd be mad to run a car without one though. Edited January 10, 2012 by stevie_b (see edit history) Quote Link to comment Share on other sites More sharing options...
Gaz6002 Posted January 10, 2012 Share Posted January 10, 2012 A small amount, but at big cost if your engine ingests the wrong thing. Quote Link to comment Share on other sites More sharing options...
Tyson Posted January 10, 2012 Share Posted January 10, 2012 A small amount, but at big cost if your engine ingests the wrong thing. Exactly this, if you have ever looked at an old air filter they are full of dirt and rubbish. If you remove the filter I think in the long run it will detremental to the engines health. Quote Link to comment Share on other sites More sharing options...
Chris Wilson Posted January 10, 2012 Share Posted January 10, 2012 Measure the vacuum drop with a cheap or home made gauge and you will KNOW if the air filter is restrictive...Anything else is mere speculation. Quote Link to comment Share on other sites More sharing options...
Branners Posted January 10, 2012 Share Posted January 10, 2012 mkivsupra.net - Thriving on speculation since 2001 Running without a filter is going to be death to your turbos. Those with a trumpet regard the turbo as a consumable item and so ingesting a stone wont worry them. For mere mortals the loss of turbos is a killer. Quote Link to comment Share on other sites More sharing options...
mellonman Posted January 10, 2012 Share Posted January 10, 2012 also its not exactly going to be a cold air you would be getting, i would of thought the gains would soon disapere with a hard run and raised temps Quote Link to comment Share on other sites More sharing options...
Scott Posted January 10, 2012 Share Posted January 10, 2012 also its not exactly going to be a cold air you would be getting, i would of thought the gains would soon disapere with a hard run and raised temps Depends where you put the trumpet. If you are super brave you could put it at the front of the car, that way you would be getting ram air, no restriction from any filter and the coldest air available. I reckon you could time the life of the turbo/engine with a stopwatch in that case though. Purely theoretically you would make more power. Anything that lowers the restriction is going to increase the top end power. This is the reason lighter internals and pulleys can gain you HP. As stated you will kill your turbos/engine though. Quote Link to comment Share on other sites More sharing options...
Noz Posted January 10, 2012 Author Share Posted January 10, 2012 I was just considering this for the dyno run after mapping, just as a final power run to try and make sure I top the 400bhp mark. Its a 500 mile round trip to the dyno for me, and the whole aim was to reach that figure. The reason for setting myself this value, was so when I reached it, I was concentrate on other things such as body work and interior, I don't want to forever be chasing power and this is the only way, to set myself a goal and to reach it. I would hope to be hitting 400hp with a boost controller anyway, but I want to give myself every chance of that. I know I'll be running on slightly less with a filter with it mapped as such. Quote Link to comment Share on other sites More sharing options...
Nodalmighty Posted January 10, 2012 Share Posted January 10, 2012 Running without an air filter effectively turns your turbo(s) into a shot blaster, fine on the dyno, crap on the road. Quote Link to comment Share on other sites More sharing options...
Scott Posted January 10, 2012 Share Posted January 10, 2012 I wouldn't bother personally, absolutely pointless IMO. If you want 400hp and you hit 395 just give it a smidge more boost. The boost level that will blow your engine is by no means an exact science. The difference between 0.9 and 0.92 isn't going to make any odds as noone runs their car that close to the edge. Quote Link to comment Share on other sites More sharing options...
mellonman Posted January 10, 2012 Share Posted January 10, 2012 it makes what it makes why try and cheat it, so you can make 400 on they dyno but only have 395 on the road its only 5bhp Quote Link to comment Share on other sites More sharing options...
Dnk Posted January 10, 2012 Share Posted January 10, 2012 mkivsupra.net - Thriving on speculation since 2001 Running without a filter is going to be death to your turbos. Those with a trumpet regard the turbo as a consumable item and so ingesting a stone wont worry them. For mere mortals the loss of turbos is a killer. What about the rest of your engine ? running without a filter is pretty daft if you ask me as your just asking for trouble and killing a turbo wont be the end of your problems Quote Link to comment Share on other sites More sharing options...
Rob_Mitchell Posted January 10, 2012 Share Posted January 10, 2012 mkivsupra.net - Thriving on speculation since 2001 Running without a filter is going to be death to your turbos. Those with a trumpet regard the turbo as a consumable item and so ingesting a stone wont worry them. For mere mortals the loss of turbos is a killer. I have a trumpet and dont think that at all, mine is for shows only, i wouldnt run the turbo without a filter when driving ect.... Quote Link to comment Share on other sites More sharing options...
Noz Posted January 10, 2012 Author Share Posted January 10, 2012 it makes what it makes why try and cheat it, so you can make 400 on they dyno but only have 395 on the road its only 5bhp Because it's a power acheivement for my engine, I'm not going to gloat I pushed an extra few HP when I didn't even run an air filter, it's just nice to know I've pushed that on the dyno with a trumpet that I will use as a show peice when I get my engine looking nice. I don't want to speculate the maximum power I could have, I'd rather just know on the dyno the max run was ###, typically on the road I run ###. If you didn't print the run, the power never happened. It's about reaching as high as possible as I know I won't be doing many more power modifications. I'd like to be as happy as possible with my last couple of runs, its a personal acheivement with the modifications I've done so far, it's not a power race or pub talk figures. It's purely to get as much as possible for my own personal benifit. I've never owned a car with such power, so I'd like as much as possible for my print out on my wall at home before I start saving for a house. Every little helps. And 5hp means alot when you've spent alot of cash trying to hit a target. Tell that to the guy who had 995bhp, to me its the same thing, a goal is a goal, I want to reach it. Quote Link to comment Share on other sites More sharing options...
Branners Posted January 10, 2012 Share Posted January 10, 2012 If you want to fool the dyno then pack everything with bags of ice, all round the intercool, airfilter, pretty much everywhere. The colder the air going in to the engine the more power you will get back. Quote Link to comment Share on other sites More sharing options...
Chris Wilson Posted January 10, 2012 Share Posted January 10, 2012 Treat it to five gallons of 116 octane and whack the timing and boost up for a couple of pulls? Quote Link to comment Share on other sites More sharing options...
Branners Posted January 10, 2012 Share Posted January 10, 2012 oh yeah, that too. Even just using toluene fuel makes a big difference, and the car smells lovely when idling!! Quote Link to comment Share on other sites More sharing options...
Chris Wilson Posted January 10, 2012 Share Posted January 10, 2012 Then shovel up the bits, mop up the oil, apologize to the dyno facility and wish you hadn't bothered. Quote Link to comment Share on other sites More sharing options...
mellonman Posted January 10, 2012 Share Posted January 10, 2012 i see your point tell the dyno operator what your goal is and if it was only 5 bhp out in sure they might adjust the dyno to suit."joke but does happen" but i would think you get over 10bhp differance from a cold misty day to a 30c summers day, so get it on the dyno while its still cold for a good result, octaine booster (race fuel). you could always add NOZ,"NOZ":eyebrows: Quote Link to comment Share on other sites More sharing options...
Gaz6002 Posted January 10, 2012 Share Posted January 10, 2012 Or you could just put a few more horses in the engine bay? Quote Link to comment Share on other sites More sharing options...
ripped_fear Posted January 10, 2012 Share Posted January 10, 2012 Just put some bling under the bonnet everyone knows that adds mega BHP! Quote Link to comment Share on other sites More sharing options...
Gaz6002 Posted January 10, 2012 Share Posted January 10, 2012 Racing stripes? Quote Link to comment Share on other sites More sharing options...
Josh Posted January 10, 2012 Share Posted January 10, 2012 Just put some bling under the bonnet everyone knows that adds mega BHP! Can't see why Mitchell is going single. With all his gold plated cable ties, he should have stayed NA and he'd still have 1,000bhp Quote Link to comment Share on other sites More sharing options...
ripped_fear Posted January 10, 2012 Share Posted January 10, 2012 Racing stripes? If you do that you need the shopping list decals down the door Quote Link to comment Share on other sites More sharing options...
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