bad E.T./ mph!!!

[talonman69]

I finally got to the track last night with my 90awd (132K). Now I am completely depressed. Before the horrible times, my mods: k@n, free mods, 95 exh. man, 2.5 testpipe and DP, 3in. catback, reg 16G, boost around 18-20lb. on "16G"!!!, full stereo w/box, etc.
My best time was a 16.03@85 or so, r/t .806
Please tell me this is just my horrible driving!!!!
might sell if my car can't get out of it's own way.

ps-are'nt stock T/E/L awd times high 14s low 15s?

rob

[Fast16G]

Hehe...I ran a 14.3 with spun bearings :) It's seized 2 minutes later :( Anyway, yeah, that's pretty slow. Obviously something is wrong somewhere, but we need more info to sort it out:

What were your 60 foot times? This will tell us how much of it is your launch.

Are you using stock injectors? I didn't see any listed and a 1G with 16G should have a 550s.

What about a fuel pump? If you're trying to run 20psi on a 16G on a 1G without at least an upgraded fuel pump, you're crazy ;) I am beginning to think that you might a have a fuel starvation problem causing knock and pulled timing.

What kind of fuel? If you don't have injectors and a pump, at least tell me you were running race fuel.

[ChosunDSM]

Your trap speed is very low so that should tell you something is wrong with the car, either maintenence problem (ex. bad motor, vaccum leak,etc) or your car setup. Don't worry. its not your driving.

[Redsand187]

Has your clutch been replaced recently, or ever? What RPM were you launching at? You should do a compresion test because your rings might be giving out. Also if your stereo is very big that can slow you down a lot. Not 2 seconds by any means but a half second is very possible.

[talonman69]

just to add some more info:
-no injectors or pump
-boost was actually around 17-18
-almost new act2600
-60ft: 2.46
-compression is ok (do have a miss..sputter once and awhile at idle. If I rev sometimes it drops to about 500rpm)
-stereo is about 60-70lbs.
-launching at about 3k-3.5k

-I actually wish it was my driving (1st time...thought it might be) and not my car!! $$$

[Peter 92TSI]

Yeah definatly a fuel problem. Running 20 psi on the stock fuel system is causing you to lose power. The ECU is really retarding timing, probably because of major knock at high rpms. I learned something after I got my 16G.... Big turbos, do little without supporting mods.

[Fast16G]

I would definitely go for the Walbro 255lph pump to start and 550s if your wallet can handle both. 1Gs run noticeably leaner than 2Gs with the same mods due to their larger ports, lower compression, and lower base fuel pressure. The DSM Shop has pretty good prices on both items: http://www.thedsmshop.com

Secondly, I don't know if 5000 is necessary (I've never launched over 4750 and usually 4000-4500), but 3000-3500 is definitely too low and is probably the cause of your bogging and subsequently poor 60 foot times. 2.4 sucks for an AWD, but it's obviously not the cause of all your problems. Knocking .6 off of your 60 foot might take .8+ off of your 1/4 mile ET. That would still only drop you to low 15s, maybe high 14s, but it's a good start.

You haven't mentioned it, but I would consider adding a few gallons of 100-103 octane at the track. I SERIOUSLY doubt you'd need anything more than that with the mods that you have and the boost you're running. It will help you keep your timing which goes a long way to make power. Make sure that you take care of your fuel system situation first.

Do you have an EGT or A/F meter? You really need to be able to monitor the mixture level to know what's going on in the engine.

You just need a little work and practice launching/shifting and you should be in good shape. I think fuel is your biggest concern right now. My 2G was running 14.0s with pretty much the same mods as you, a completely stock exhaust system, and upgraded fuel pump @ 17psi.

[ecoli]

If you get 550s, you need an AFc or some sort of fuel computer. I would try adding a fuel pump and doing the fuel pump rewire mod. Also check for boost leaks and check your engines compression. A 2.46 60' is very bad for an AWD, but your MPH should be much higher regardless of your 60'.

[talonman69]

has anyone ran without the fuel pump, then installed? did you lower your time and mph? If I don't have a compression, what else could it be?

soon to install pump, 550s, and AFC!

rob

[Fast16G]

Yep. Go here: http://rossl.home.texas.net/slips.htm and to spare yourself, just start reading after the 3rd chart of runs. Read down to the 6th chart. That was on my old GSX (2G) with a similar list of mods compared to yours at that time.

You'll see that I picked up my car from the dealer on Friday before an event from having the fuel tank recall done. Of course, I never thought in a million years they'd replace my Walbro, but they did. So I ran that weekend unknowingly with a stock fuel pump and did pretty poorly (notice the traps). Then scoot down to the 6th chart after I put the fuel pump back in and DIDN'T DO *ANYTHING* EXCEPT INSTALL THE FUEL PUMP and compare the difference.

[talonman69]

thanks fast16G...that's amazing how much the pump pulled your time/mph down. Well that should help shave .5-.6 off but I'll still be in the 15s...what's up with that. compression is OK. do you think timing is really killing power? how about an intake leak (I did just install an upper IC pipe.

what ya think?
rob

[Fast16G]

Yeah, it's amazing what the right fuel supply will do for a setup. I am really sure this is part of your problem. I had a PMS and was tuned with the 255lph. When it was gone, it ran leaner. Put it back in and voila!

Ignition timing will definitely help or hinder your performance. If it didn't, no one would ever run race gas.

Depending on the size of an IC pipe leak, it might make a difference. If you car holds steady boost, you don't have a leak or it's very small. If you did have a leak, you'd be running richer than normal (maybe too rich), which could cost you power as well.

Did you check compression before or after you ran those times? I am just wondering if it was knocking like mad during the runs (causing the slow times/traps). If you checked it before, I suggest checking it now to make sure you didn't hurt anything important.

I would get the pump (and 550s if you can...but the injectors are useless w/o the pump so get it first), gap your plugs to .028" if they aren't already, check the IC pipe, add some race gas, and try launching at 4500 RPM. All of this should help considerably.

You'll need further work to really get the setup more compatable to where you can really use the 20G, but start with the basics first.

[talonman69]

thanks dude?