Horrible 1/4 mile

[2g2ner86]

I have a 2g FWD and I went to the track 2 days ago. My best 60' was 2.498 and my 1/4 mile was [email protected]. I was hot out that day, 98 to be exact. After i got home I noticed 2 of my vacuum lines we not connected, both on the back of the intake manifold. Could that make my times that bad???
My mod list is... evo3@16psi, tuned, 3" turbo back, port and polish head, 8:1, bored .020, FMIC, ported 2g exhaust manifold and o2, 660 injectors.
I would have thought it would have ran at least a 14.5. I have to work on my launching but other then that, does anyone have any advice?

 

[Alex7747]

Tires? Suspension?

 

[DSMTyson]

I have a 2g FWD and I went to the track 2 days ago. My best 60' was 2.498 and my 1/4 mile was [email protected]. I was hot out that day, 98 to be exact. After i got home I noticed 2 of my vacuum lines we not connected, both on the back of the intake manifold. Could that make my times that bad???
My mod list is... evo3@16psi, tuned, 3" turbo back, port and polish head, 8:1, bored .020, FMIC, ported 2g exhaust manifold and o2, 660 injectors.
I would have thought it would have ran at least a 14.5. I have to work on my launching but other then that, does anyone have any advice?

Its all in the 60 foot in your case.

 

[2g2ner86]

I have stock suspension and falken street tires, 18" rims (i know, i know )

 

[Pauly D]

Do you have it tunned? and I dont know if its me but isnt 16psi a little low for track especially on that evo3.

 

[2g2ner86]

yes its tuned. Buy my big issue with the tuning was bad boost creep. It would be 10psi until around 5500 and then creep up to 16psi by 6500. So I got it tuned to work with the creep.

 

[Pauly D]

You do know boost creep is bad and are you running a mbc? or external wastegate? Did you port the exhaust manifold or o2 housing. I dont understand why your getting boost creep tho.

 

[2g2ner86]

Yes im running a MBC, internal wastegate, Ported 2g exhaust manifold and ported 2g o2 housing, 3" turbo back exhaust (thermal R&D). Yes i know boost creep is bad, but I dont know how to get rid of it other then going to external wastegate.

 

[GSX401]

I have stock suspension and falken street tires, 18" rims (i know, i know )

AWD can barely get away with that...your poor car must be wheel-bouncing like a basketball.

 

[2g2ner86]

nope, no wheel hop at all (poly motor mounts)

 

[Pauly D]

The 3 in turbo back might be your main cause too me. Its a bit overkill unless your puttin big numbers. If you have your old exhaust try putting it back on and see if it goes away. usually a turbo back is going to be your culprit for boost creep on turbo engines well in most casses.

 

[2g2ner86]

sadly no I dont have my stock exhaust anymore.

could the 2 vacuum lines that were not hooked up make a big difference also?

 

[Pauly D]

Are you running any catalytic converters ??

 

[Calan]

I have a 2g FWD and I went to the track 2 days ago...and my 1/4 mile was [email protected] would have thought it would have ran at least a 14.5.

Ehhh...you answered your own post.

1. My best 60' was 2.498

2. It was hot out that day, 98 to be exact.

3. After i got home I noticed 2 of my vacuum lines we not connected, both on the back of the intake manifold.

4. It would be 10psi until around 5500...

I'd say 15.13 on a FWD car is a pretty good time considering all of that.

 

[2g2ner86]

no cat, but my exhaust is weird. I have a 3" dp, and the at the part where the cat back bolts up to the dp it is 2.5" and goes for about 18" and then opens up to 3"

 

[GSX401]

Boost creep is not "bad" if you have a tuning solution. Some guys purposefully creep. When I made a post on my local forums about boost creep I was told the solution of: "Buy some bigger injectors and get Link."

 

[2g2ner86]

Boost creep is not "bad" if you have a tuning solution. Some guys purposefully creep. When I made a post on my local forums about boost creep I was told the solution of: "Buy some bigger injectors and get Link."

I put 660 injectors in and I got it tuned with the creep. I didn't think creep was "that bad" unless its creeping into numbers where you cant tune anymore.

 

[Pauly D]

Thats probally the resonator but now seeing the wisemens post id have to agree its a prettty good time just fix the vaccum hosses and give it another try at the track. as for boost creep im pretty sure its the exhaust although i chould be wrong.

 

[2g2ner86]

Thats probally the resonator but now seeing the wisemens post id have to agree its a prettty good time just fix the vaccum hosses and give it another try at the track. as for boost creep im pretty sure its the exhaust although i chould be wrong.

Yeah, the lines are already hooked back up and clamped on. I'm going to run it again in 2 weeks and hopefully this heat wave is gone. I will work on my launches. I launched at 3k and sliped the clutch a little, but it felt really boggy, I guess turbo lag, so I didnt really have to worry about wheel spin that much. I think I was finally making power and I was already at the 60'. I guess ill try 3500 - 4k rpm this time. Maybe throw the stock 16's back on the front and drop the tire pressure a little.

 

[Calan]

I'm not recommending anything here (since I know nothing about your car), but 10 psi at 5500 rpm creeping to 16 psi on an E3 16g is barely scratching the surface. With 660's, a wally 255 pump, and a good tune... you should be able to run a solid 18 to 22 psi from full spool (3200 rpm or so) all the way to the rev limiter....assuming good gas and decent intercooling.

Again... don't go out and just crank up your boost! I'm just giving you something to think about and look into.

 

[2g2ner86]

I'm not recommending anything here (since I know nothing about your car), but 10 psi at 5500 rpm creeping to 16 psi on an E3 16g is barely scratching the surface. With 660's, a wally 255 pump, and a good tune... you should be able to run a solid 18 to 22 psi from full spool (3200 rpm or so) all the way to the rev limiter....assuming good gas and decent intercooling.

Again... don't go out and just crank up your boost! I'm just giving you something to think about and look into.

I do have a wally 255 pump, so thats good news. I have to take the car back to get it tuned up a little higher. But, do i turn up the boost until it hits the desired psi at full boost around 3100 rpm, or should i compensate for the creep and get it to creep up the the desired psi at red line? (I get free tuning since I already went there, as long as I didnt change anything major)

 

[Calan]

...do i turn up the boost until it hits the desired psi at full boost around 3100 rpm, or should i compensate for the creep and get it to creep up the the desired psi at red line?

It depends on the car and what it wants. The only way to find out what works best on your particular setup is through lots of trial and error.

I'd look into ways to limit the creep first so it's controllable, and then worry about slowly upping the boost and safely making power. There are LOTS of threads here on boost creep, but basically you could consider going back to a smaller exhaust as stated (not ideal), or doing some port work on the turbo and related components.

EDIT: If it's only creeping to something around 20 psi, you'll probably be ok with the mods you currently have. Just work on getting everything in line (including a decent data logger if you don't have one) and a good tune so you can run 20 psi safely.

Sounds like you need to do a lot of reading (and I don't mean that as an insult)...it will save you a bunch of money and headaches in the long run.

BTW - Has all the maintenance been done on the car, particularly the timing belt and all of those components?

 

[2g2ner86]

Yes, everything on the motor is pretty much brand new. I rebuilt my short block about 6000 miles ago (pistons, rods, crankshaft, bearings) The timing belt has about 10k on it. Im ready about boost creep right now. I read alot on here, if im not working on my car im on here reading about working on my car

 

[Calan]

Good deal. Sounds like you are on the right track.

Keep at it... you'll get there.

 

[2g2ner86]

Ill post back here with my new times in 2 weeks and let everyone know what they were. Thanks everyone for the help.