why so slow?
07-11-2005, 09:52 PM
#16
Drifting
Thread Starter
well i checked my timing today.... looks like for the cam sprocket and mark...the cam sprocket mark is about 3/4 tooth before the housing mark. this is with the ot line directly on the bottom of the pointer. does this sound right? if i move it a tooth, itll be 1/4 advanced. i might just take off my balance belt again!
07-13-2005, 02:18 PM
#17
Drifting
Thread Starter
when still cold, my car keeps idling at only 600-700. i am setting the idle when the car is warm at around 900-950.
i just replaced the aav a little more then a year ago. could this be my power problem? does this still sound liek a vacuum leak?
today i noticed that when trying to move from a stop, it stutters more before the car gets up to the middle temp line.
i think my svo used to act like this when the fuel pump started messing up, and my a/f gauge read lean.
i just replaced the aav a little more then a year ago. could this be my power problem? does this still sound liek a vacuum leak?
today i noticed that when trying to move from a stop, it stutters more before the car gets up to the middle temp line.
i think my svo used to act like this when the fuel pump started messing up, and my a/f gauge read lean.
07-13-2005, 04:08 PM
#19
Drifting
Thread Starter
well its a 98 2.0 with a newer style intake and a cone filter. he has suspension work done to it, and we swapped in an auto. we have raced before, and this time was completely different. his car still isnt fast, its the fact that mine is super slow right now. im sure my girlfriends escort would beat me.
07-13-2005, 04:56 PM
#20
Consider this.
The last guy i raced in my 928S was in a 02'ish 1.8T Turbo GTI. He stayed within 2 lengths of me to 100, closed the gap by 110 or so, and blew by me at about 115 like i was standing still(he bailed as soon as he finally managed to pass me, so i don't know how long he'd have been able to stay out front, cuz he's a wuss)
Both my car and his were both not stock(Mine ran a best ever 13.67 in the quarter last year, and he had what was easily the loudest BOV i've ever heard, plus an aftermarket exhaust, probably at least a cold air intake and turbo timer as well i'm sure), but it's a good indicator of the kind of performance the little GTI turbo's are capable of.
Bone stock i think the new ones are well into the 14 second ET range...much faster than any stock 944 Turbo.
The 87 944 turbo i drove yesterday felt like about a 15 second flat car at best.
If you really have a hard on for this guy, go get yourself a 100horse wet nitrous system for 600 bucks. You'd blow his motherloving doors off....or just take him into the twisties.
As far as what's wrong with your car sadly i can't help you. I don't know much about 944s. If it's a turbo i would check to ensure that the BOV/Wastegate is functioning properly though. Might be that you're not making boost, or at least, that you're not making the boost you should be.
The last guy i raced in my 928S was in a 02'ish 1.8T Turbo GTI. He stayed within 2 lengths of me to 100, closed the gap by 110 or so, and blew by me at about 115 like i was standing still(he bailed as soon as he finally managed to pass me, so i don't know how long he'd have been able to stay out front, cuz he's a wuss)
Both my car and his were both not stock(Mine ran a best ever 13.67 in the quarter last year, and he had what was easily the loudest BOV i've ever heard, plus an aftermarket exhaust, probably at least a cold air intake and turbo timer as well i'm sure), but it's a good indicator of the kind of performance the little GTI turbo's are capable of.
Bone stock i think the new ones are well into the 14 second ET range...much faster than any stock 944 Turbo.
The 87 944 turbo i drove yesterday felt like about a 15 second flat car at best.
If you really have a hard on for this guy, go get yourself a 100horse wet nitrous system for 600 bucks. You'd blow his motherloving doors off....or just take him into the twisties.
As far as what's wrong with your car sadly i can't help you. I don't know much about 944s. If it's a turbo i would check to ensure that the BOV/Wastegate is functioning properly though. Might be that you're not making boost, or at least, that you're not making the boost you should be.
07-13-2005, 06:05 PM
#22
"thats rediculous. a 1.8 L turbo beating an 8 cylinder 5.0L or whatever it is.....
How is that possible?"
Just for the record, had we been racing 1/4 mile i'd have beaten him by over a length...my car traps at about 102 on a typical run, and he didn't pass me till i was at about 110. So at the track, i'd have beaten him.
How it's possible for a 4 cyl to beat an 8 cyl is a function of boost, gearing, and vehicle weight.
Every 14.7psi of boost(1 bar), is the equivelant of doubling displacement, minus thermal heating of the air charge(the higher the boost, the greater the thermal heating, the less return for each psi of boost. That's why intercoolers are so useful....they help to reduce the intake charge heating caused by the compressing of the air in the turbo or SC)
So a 1.8 liter motor operating at 1 bar of boost is really a 3.6, and at 2 bars it's really a 5.4!!!(again, that's dismissing thermal losses)
This is why super high horse 4 cylinder boosted engines all run at very high boost levels. A 100% efficient 3 liter motor at 50psi is really the same as a N/A 10 liter engine as far as max. power output is concerned.
I had him all the way to 110mph. So until that point i had a HP x gearing advantadge. When i hit 3d gear at 98mph he immediately began to close the gap i'd opened up to that point, suggesting that once i was in 3d he had a gear ratio x HP advantadge, which is why he was able to fly by me by the time i hit 115.
I'm sure i'd have passed him again with ease at a higher speed, because i highly doubt the box shaped GTI would be able to match the top speed of my much more aerodynamic 928S.
How is that possible?"
Just for the record, had we been racing 1/4 mile i'd have beaten him by over a length...my car traps at about 102 on a typical run, and he didn't pass me till i was at about 110. So at the track, i'd have beaten him.
How it's possible for a 4 cyl to beat an 8 cyl is a function of boost, gearing, and vehicle weight.
Every 14.7psi of boost(1 bar), is the equivelant of doubling displacement, minus thermal heating of the air charge(the higher the boost, the greater the thermal heating, the less return for each psi of boost. That's why intercoolers are so useful....they help to reduce the intake charge heating caused by the compressing of the air in the turbo or SC)
So a 1.8 liter motor operating at 1 bar of boost is really a 3.6, and at 2 bars it's really a 5.4!!!(again, that's dismissing thermal losses)
This is why super high horse 4 cylinder boosted engines all run at very high boost levels. A 100% efficient 3 liter motor at 50psi is really the same as a N/A 10 liter engine as far as max. power output is concerned.
I had him all the way to 110mph. So until that point i had a HP x gearing advantadge. When i hit 3d gear at 98mph he immediately began to close the gap i'd opened up to that point, suggesting that once i was in 3d he had a gear ratio x HP advantadge, which is why he was able to fly by me by the time i hit 115.
I'm sure i'd have passed him again with ease at a higher speed, because i highly doubt the box shaped GTI would be able to match the top speed of my much more aerodynamic 928S.
07-13-2005, 11:04 PM
#23
Drifting
Thread Starter
well, im not really concerned with racing my friend...its more of how to get my car back up to its old standard. i have raced in the past and beaten: v6 firebird, newer ford lightning, 70s stingray corvette, various hondas and accuras....tons and tons of hondas wanting to race. and this friends gti. oh also beat my friends grand am and another friends' 5.0 cougar. the only race i lost that i drove was to a 5.0 sn95 mustang that had a custom paint job and a huge vortech supercharger sticker on it. the lightning was the toughest one, because like your friend with the 1.8t, i just started pulling on him in higher speeds. he was past me the majority of the time......
now the pathetic part: my friends gti is not a turbo, it is a 2.0 n/a. the turbos are all 1.8 for a gti anyway. he has a bad vacuum leak, and his "hotrod" skills consist of cobbling together junk to make things barely work with a factory system. tons of his sensors are unplugged, and you can smell his car running rich.
when i started working on my car in august or september to do a ton of stuff to it, i found that the balance belt was broken, but i had no other fell of vibrations. i also used to have the power steering disabled. i would like to take the balance belt back off to see if i gain any more speed.
i still havent seen if anyone had any real evidence of long term problems by not using the belt.
the only other thing i have not changed during my 6month tune up, was the o2 sensor. i will be getting that soon, and will replace my fuel lines. hopefully that will clear up a little power for me.
any more suggestions?
now the pathetic part: my friends gti is not a turbo, it is a 2.0 n/a. the turbos are all 1.8 for a gti anyway. he has a bad vacuum leak, and his "hotrod" skills consist of cobbling together junk to make things barely work with a factory system. tons of his sensors are unplugged, and you can smell his car running rich.
when i started working on my car in august or september to do a ton of stuff to it, i found that the balance belt was broken, but i had no other fell of vibrations. i also used to have the power steering disabled. i would like to take the balance belt back off to see if i gain any more speed.
i still havent seen if anyone had any real evidence of long term problems by not using the belt.
the only other thing i have not changed during my 6month tune up, was the o2 sensor. i will be getting that soon, and will replace my fuel lines. hopefully that will clear up a little power for me.
any more suggestions?
07-13-2005, 11:16 PM
#24
Addic
Rennlist Member
Rennlist Member
i dont think your balance shaft belt will help your speed at all. fairly certain. it is just to help counter balance the big 4 cylinder firing so it is smoother. and then i have read only above 2800 rpms.
07-14-2005, 02:23 AM
#26
Drifting
Thread Starter
the balance belt is still driven off of the crank though, right? for a long time...maybe two years, my car felt faster than it is now, and it had a broken balance shaft belt.
07-14-2005, 02:29 AM
#27
Addic
Rennlist Member
Rennlist Member
yea they are. but they can be turned with very little effort. so maybe there would be a slight increase in how quickly it revs, but i dont see it being anything nearly as drastic as to what you are describing
07-14-2005, 03:29 AM
#28
"any more suggestions?"
Techron fuel injection cleaner, several tanks in a row.
You can get it at pep boys for about 10 bucks.
Works great(basicly the same stuff a shop uses when they pressure flush your system).
One other thing. Grab an assistant. Have them sit in the car, and with the engine off, floor the accelerator.
From under the hood, while the pedal is floored, manually ensure that the throttle is actually open all the way. A worn throttle cable will NOT open the throttle all the way even though you floor it!
That's a fairly common problem with 928s, so it may also happen to 944s.
Techron fuel injection cleaner, several tanks in a row.
You can get it at pep boys for about 10 bucks.
Works great(basicly the same stuff a shop uses when they pressure flush your system).
One other thing. Grab an assistant. Have them sit in the car, and with the engine off, floor the accelerator.
From under the hood, while the pedal is floored, manually ensure that the throttle is actually open all the way. A worn throttle cable will NOT open the throttle all the way even though you floor it!
That's a fairly common problem with 928s, so it may also happen to 944s.
07-14-2005, 03:32 AM
#29
"Stock they are faster that. The example you drove must have been tired."
It might've been a high-mid 14 car. I drive a mid 13 car everyday, so of course a mid 14 car will feel a lot slower to me.
It had a much different feel. My 928 has tremendous low end power, which obviously a 4 plug hole turbo car isn't going to have, so it's very possible i'm just misjudging it because i'm used to a much different feeling of acceleration with my big V-8.
The car was really nice, nothing about it was whooped, so it was probably me. I also didn't sit there and launch it either...it's not my car, lol.
It might've been a high-mid 14 car. I drive a mid 13 car everyday, so of course a mid 14 car will feel a lot slower to me.
It had a much different feel. My 928 has tremendous low end power, which obviously a 4 plug hole turbo car isn't going to have, so it's very possible i'm just misjudging it because i'm used to a much different feeling of acceleration with my big V-8.
The car was really nice, nothing about it was whooped, so it was probably me. I also didn't sit there and launch it either...it's not my car, lol.
07-29-2005, 09:09 PM
#30
Drifting
Thread Starter
well i think some of my slow issue is caused by the extra weight of tools and spare that im not used to carrying around. i have about 6 qts of tranny fluid, oil, and also a gallon of antifreeze for safety...and i noticed my car picked up some speed when i was down to the empty line for the gas gauge.
BUT, my idle still messes with me. i set my idle when my car is warmed up. it seems that my car is not doing any type of high cold start idle stuff. always idling around 600-700, then it finally idles at 900 when its warm. this is a new auxiliary air valve, which i think is slang for idle stabilizer. what else can i look to? anyone? anyone?
BUT, my idle still messes with me. i set my idle when my car is warmed up. it seems that my car is not doing any type of high cold start idle stuff. always idling around 600-700, then it finally idles at 900 when its warm. this is a new auxiliary air valve, which i think is slang for idle stabilizer. what else can i look to? anyone? anyone?