View Full Version : boost killin my car?
boragirl
06-24-2005, 05:51 PM
i was just at roberto's picking up some lunch, and this guy came up to me to ask about my car. now, he wasn't the typical "is that an S4?"... "did you buy it from the dealer like that?"... "is that a body kit?"... "wanna come home with me?" type of guy.. he wasn't sleazy and seemed knowledgeable about cars, which is why i listened to him.
which brings us to the part where he became horrified when he found out how much boost i'm running in my car. i've had an apr chip in there for a few years, and depending on the day, it spikes at 19-22 lbs and holds at 15-18ish lbs.
i realize this is a whole lot more than the stock 10ish lbs. i never really put that much thought into it, since i'd heard good things about apr reliability, and was more concerned at the time with "going fast" than keeping my car running for a long time.
anyway, i know a lot of you have MKIVs with chips running similarly high boost.. just wondering if anyone's started having problems yet? what's your take on the effect this is going to have on the life of your motor? should i reprogram the stock program in there so i can switch it back more often?
advice is appreciated :corn:
Agent Orange
06-24-2005, 06:34 PM
Not necessary. Been working for VW for 7 years, people been chipping turbos since they came out. i still see some of these guys and theyve not had any boost related problems
wikedgolf
06-24-2005, 06:52 PM
195k almost.. no chip,, but i have a Split second BBS.. yes my boost acts up once in a while.. some time's i'll have it floored and it takes a second to kick in, but one it does, it hits my engine like a shot of NOS.. its funny like that.. but then again my car does funny things and you should use my car to compair yours too.. mines not normal
It depends on certain things like compression ratio, fuel delivery, intake air temp, timing. 15-18 of boost is fine as long as you have the fueling to suit it and it isn't over speeding your turbos. I have never seen you car or a dyno plot with A/F diagrams, but if you have bought everything for your software from a single suplier who knows his stuff and cars, then it should be fine. But as always, the star that burns the brightest, burns for the shortest amount of time.
Our 993 twin turbo would max out at 1.6 bar (or 23.5 lbs) at a compression ratio of 9.8:1 and made 760 RWHP, but then again it would last for around 50 hours and would burn through race gas like crazy (we would get about 1:15 on 42 gallons of fuel) They wouldn't let us race this car with the cars from Japan for GT Live for speed channel, they sent us a invite but failed us at tech inspection on a tow hook technicality out of fear
http://img.photobucket.com/albums/v313/vwman70/DSCN1818.jpg
http://img.photobucket.com/albums/v313/vwman70/DSCN1816.jpg
http://img.photobucket.com/albums/v313/vwman70/DSCN2058.jpg
sandiegobmx
06-24-2005, 06:58 PM
If you've been chipped for years, then commonsense should tell you that it isn't a problem. Sounding knowledgeable doesn't mean he's correct, especially if he's not familiar with 1.8ts.
I've built more turbo go fast motors than you have underwear, and boost science remains the same no matter what engine a turbo is on. be it a 1.8T like yours, a Porsche or a frickin yugo. All the variables remain the same, C.R., boost, fueling, air temp, timing, fuel quality, turbo capabilities.
But then again running high boost on a motor WILL have its adverse effects on things overtime. be it 800 or 80K miles, it will shorten the lifespan of certain components
boragirl
06-24-2005, 07:44 PM
But then again running high boost on a motor WILL have its adverse effects on things overtime. be it 800 or 80K miles, it will shorten the lifespan of certain components
yep that is what i've figured since i got it. i definitely never expected it to help matters, i guess i was just curious if anyone's already been experiencing problems.... perhaps our cars are still so new, it may be too soon to tell. ah well you pay to play right?
mitssn
06-24-2005, 07:46 PM
Fugg it... If it breaks, it give you a reason to upgrade...
look at mels car, I cant belive its still on the original turbo!
Steve hit the nail on the head though, "well the head gasket is blown, so I might as well install cams while the heads off, as long as the head is stripped, maybe a little head work, well shit, the turbo and manifold are off too and I will save money in labor now if I upgrade my turbo now, come to think of it, the tranny is right there too and that clutch has some miles on, now the tranny is out........................
Hate to thread Hi-Jack but I'm overdue for an update of my golden sow anyway so be very careful though as it can snow ball pretty bad, my 911 need a simple rebuild, if you remeber thats it. BUT, "while I'm in there".......... well over $11K later I have a full blown race motor that is completely race balanced, blueprinted, race cams, headwork the whole enchilada I havent assembled yet as the intake is off to extrude hone soon, with a MAF kit to get rid of 1980's technology of the BOSCH air meter.
and fuck it, the gear box is out too so I'm bringing the locking up to 60% with the ZF diff and rebuilding it with cryo treated gears, Wevo shiftgate, maybe an oiling system for the box and changing the gear stack a little to ensure the quick death of a 996TT to about 140. But it has been apart for 9 months now in sits in my garage waiting for its ultimate return at some point. There is way more but too much too list
But look at the size of those ports!
http://img.photobucket.com/albums/v313/vwman70/DSCN1906.jpg
Crankshaft
http://img.photobucket.com/albums/v313/vwman70/DSCN1911.jpg
Engine case
http://img.photobucket.com/albums/v313/vwman70/DSCN1884.jpg
ncttrnl
06-25-2005, 12:20 AM
Ooooooh pretty pictures..... mmmmmmm flat 6 goodness.... oh wait
Mel, your car is fine. The harder you push it the faster stuf breaks but you would be surprised the abuse these things will take.
One thing to keep in mind is that if the guy was used to boosting normally aspirated motors, anything over 10 psi is going to sound extreme to him. Whatever he may be used to may be what influenced his response.
damn that looks fun. Nice choice in wheels. :) Kinesis unlike the HRE's being banned from racing for mechanical failures!
It depends on certain things like compression ratio, fuel delivery, intake air temp, timing. 15-18 of boost is fine as long as you have the fueling to suit it and it isn't over speeding your turbos. I have never seen you car or a dyno plot with A/F diagrams, but if you have bought everything for your software from a single suplier who knows his stuff and cars, then it should be fine. But as always, the star that burns the brightest, burns for the shortest amount of time.
Our 993 twin turbo would max out at 1.6 bar (or 23.5 lbs) at a compression ratio of 9.8:1 and made 760 RWHP, but then again it would last for around 50 hours and would burn through race gas like crazy (we would get about 1:15 on 42 gallons of fuel) They wouldn't let us race this car with the cars from Japan for GT Live for speed channel, they sent us a invite but failed us at tech inspection on a tow hook technicality out of fear
mitssn
06-25-2005, 01:19 AM
I have a question---What is the consequence of way over revving the engine? I was in 1st gear and revved it way to high... Like pegged the needle, but it was only for a split second... in that split second, the car definetly hit a "dead spot" if you know what I mean. I dunno if it's just my paranoia, but the car seems slightly off... Could i have fugged something up? and what could it be if I did?
factory rev limiter is always set below the ACTUAL limit. so you are OK. Bad things? floating valves, rod bolts. Dont worry! My GTI see's its redline ATLEAST once a day...130K and counting, knock on wood.
Kinesis is much better than HRE's, plus you get that cool smeel of burnt magnesium when you put them on with a gun! They will bend WELL before they break.
mitssn
06-25-2005, 01:33 AM
Revo eliminates the factory rev limiter I beleive.... If something was messed upp, would it be very obvious?
oh hell yeah, every chip moves the rev limiter up a little to take advantage of the fatories "fudge" room, but the extra RPM's only really come in handy with a camshaft(s) change, you would know because it usually floats and bends valves, or sends a rod through the block.
Just dont make a habit of it
mitssn
06-25-2005, 01:43 AM
oh hell yeah, every chip moves the rev limiter up a little to take advantage of the fatories "fudge" room, but the extra RPM's only really come in handy with a camshaft(s) change, you would know because it usually floats and bends valves, or sends a rod through the block.
Just dont make a habit of it
Thank You!!
vBulletin® v3.7.4, Copyright ©2000-2008, Jelsoft Enterprises Ltd.