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are my 1/4 miles times normal

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915GsT

10+ Year Contributor
32
0
Apr 16, 2009
El Paso, Texas
just want to see where i stand here, i went to the track with high hopes and left very disappointed.

97 gst (spyder)
mods include evo 9 injectors and fuel pump
apexi safc
k/n filter
fmic
aftermarket bov
kyb struts and eibach springs (2inch drop)
ngk bpr7s
new spark plug wires
a/f aem uego monitor
xs boost controller (set at 11 lbs but spikes momenteraly to 14 and then drops)
boost gauge
2 1/2 - 3" dp to 3" cat back (thermal exhaust)

now i did run with full interior and 17 inch rims, and like i mentioned at 11 lbs (still on t25) i spike for like a second to 14 but then it goes back down to 11.
i have it set there because the shop that tuned my car recommended i didnt push it too much on this turbo.

well i took it out to the the track and these are the results.

1/4 =16.1
total speed 86.87
60 foot was 2.564

am i doing something wrong here or are these times normal for the mods i have????

if someone can please clarify id appreciate it...

Thanks in advance !
 
Yes 12 psi on a stock 2g car. The 60' time seems terrible. You will pick up ALOT of mph and cut times with improved 60'. What was your reaction time? A .500 is generally a perfect light. A set of good cams, balance shaft eliminator kit for improved lubrication, more boost and better tuning will also help improve things, but it sounds like alot of it was honestly in the driver.
 
First time at the track? Practice will help improve those times. The FMIC on that t25 probably is not helping your situation either. How does your car run with those bpr7s and stock boost?
 
16 seconds is pretty crappy, the car bone stock runs roughly 15.1-15.5, that fmic on stock turbo actually makes you lose hp,and make sure the car is tuned good! You should at least have a 16g with 560cc injectors and a fmic and 3" exhaust you can run 20lbs. Safely on that setup I did for 2 years then the turbo blew
 
16 is fast...in the Honda world, but it sounds to me like you aren't launching and/or shifting right or on time. And reaction time definitely plays a big role in your overall time. A t25 is a smaller turbo than even the 14b(stock 1g) and unless pushed to a higher boost level, will probably have a hard time keeping a fmic at a good efficiency level to add to hp instead of take away from it....which is what's happening.
 
I ran a 16.1 @ 82.4 MPH with my 1g non turbo with just a K&N, 2.5" cat-back, and new NGK plugs and wires.

This weekend I ran a 14.33 @ 101.1 on a 14b @ 14 psi. Stock injectors, stock SMIC, no tune, FULL interior, and 17" rims with cheap street tires. I had a 2.4 60'. My best 60' of the day was a 2.3.

You need to work on your launch (so do I). What RPM are you launching at? Where are you losing traction? But even with the bad 60' you should be getting better then 16's.

First thing I would do is go back to the BPR6ES plugs instead of the colder BPR7ES, you don't need those yet.

Have you done a boost leak test? My guess is that you are leaking a lot and that can affect your times immensely because your turbo has to work harder to keep up with the pressure loss and on a t-25 it only has so much it can do. If you haven't already do a boost leak test (even if you have, do it again!).

What is your AFR at WOT? How high are you revving to before you shift?

Lastly how many passes did you make? It takes practice you get a good launch and good times. Hang in there.

Hope this helps!
 
16 is fast...in the Honda world, but it sounds to me like you aren't launching and/or shifting right or on time. And reaction time definitely plays a big role in your overall time. A t25 is a smaller turbo than even the 14b(stock 1g) and unless pushed to a higher boost level, will probably have a hard time keeping a fmic at a good efficiency level to add to hp instead of take away from it....which is what's happening.

The clock doesnt start ticking until after you start moving. So reaction time plays no part in his ET. You could sit there for 30 seconds until you are ready and it wont start ticking.
 
The boost spike would be the only thing keeping me from wanting to raise the boost if I was you. Otherwise I would say just set the t25 at 15psi and get everything out of it possible. Like others said, a frontmount paired with a t25 will just cause more lag and not help anything. Also, seeing as you've got evo injectors, an evo fuel pump, and an afc, just pick up a 14b or 16g somewhere and run closer to 20 psi and you should be much faster. Otherwise those mods aren't doing much for you either, although they shouldn't be hurting you.
 
Still you should be well into the 15's...

Another thing that kinda makes me confused is the fact that the stock fuel maps are pig rich. Your should have your AFC leaning out up top and adding the bigger injectors should make you lean them out even more.
 
well... i was considering turning up the boost to 15 because even with a spike to 20 lbs i should be good... the set up is good for it... i think LOL... correct me if im wrong.

as far as launching im having to launch at about 2.5 because if i go any higher ill spin out... i read the v faq on how to launch.... im reving up to 6.5-6.7 every gear... my a/f gauge reads at 11.1 -10.9 at wot...
i have checked boost leaks and have not found any, my vac at idle is about 11, sometimes 14 in the mornings... constant with out any idle issues is that normal?

this is my first time running times, not my first time racing, ive raced turbo mazdas before this. im still fairly new at the dsm life but i plan to stay here... if theres anything i should check or something that seems a bit off pls lmk...

also the bpr7's are good imo... have not had issues.
 
Yes 12 psi on a stock 2g car. The 60' time seems terrible. You will pick up ALOT of mph and cut times with improved 60'. What was your reaction time? A .500 is generally a perfect light. A set of good cams, balance shaft eliminator kit for improved lubrication, more boost and better tuning will also help improve things, but it sounds like alot of it was honestly in the driver.

reaction time doesn't effect the actual time. it just makes the driver in the other lane freak out when you pull off a .00. (I have only done it once, and it was awesome, although i couldn't get my car into third and had a horrible time, but great 60)

how about offer some driving tips, not mods. to go fast, you have to know how to drive fast. you have to know how to get off the line.

16 is fast...in the Honda world, but it sounds to me like you aren't launching and/or shifting right or on time. And reaction time definitely plays a big role in your overall time. A t25 is a smaller turbo than even the 14b(stock 1g) and unless pushed to a higher boost level, will probably have a hard time keeping a fmic at a good efficiency level to add to hp instead of take away from it....which is what's happening.

no. reaction time has nothing to do with your time.

well... i was considering turning up the boost to 15 because even with a spike to 20 lbs i should be good... the set up is good for it... i think LOL... correct me if im wrong.

as far as launching im having to launch at about 2.5 because if i go any higher ill spin out... i read the v faq on how to launch.... im reving up to 6.5-6.7 every gear... my a/f gauge reads at 11.1 -10.9 at wot...
i have checked boost leaks and have not found any, my vac at idle is about 11, sometimes 14 in the mornings... constant with out any idle issues is that normal?

this is my first time running times, not my first time racing, ive raced turbo mazdas before this. im still fairly new at the dsm life but i plan to stay here... if theres anything i should check or something that seems a bit off pls lmk...

also the bpr7's are good imo... have not had issues.

turn it up, and adjust with your safc. stay around the 10.9-11.3 area.

also when you are in your upper RPM range you will feel where your car is making maximum power, ideally you want to shift 200-300 rpms after that.

drive your car more, and hit the track more often. launching a car at a track is totally different than launching on the street. I have dumped my clutch before on the street and had no issues (and it was an accidental dump), i did it at the track and grenaded a transmission. (expensive accident)
 
Practice on your 60's, try lowering your tire pressure to ~20-25psi
2.2s will put you solidly in the 15s.
Get a wideband, tune your a/fs to around 10.6-11:1 on pump, factory is very rich at ~9.5:1
Since you have a boost controller, try and get it to spike ~17-18psi and dropoff from there
As said don't expect much from the T2small, but 14s are certainly attainable with limited work.
 
vac at idle is about 11, sometimes 14 in the mornings... constant with out any idle issues is that normal?



Do you have cams? If not I would assume you have a vacuum leak. should be more around 18-20.
 
My single cam vtec did 15.3 on slicks, aem v2 intake, dc header, no cat, exhaust, and skunk 2 manifold no tune. LOL
I've never timed my gst yet but the way it feels... it hasn't compared to my civic coupe.
I've seen some gst's run better times with less mods. I'm assuming your intercooler is killing it.
There's fact why people say an intercooler is useless on a tsmall.
Think of a kitchen sink with running water as the turbo and you're filling water(which in this case is air) into a pepsi can. Fills it up with no time. Now think of a 2liter pepsi bottle as your front mount intercooler. Try filling that up with the same sink with running water. It's gonna take a while because that bottle/front mount is to big to fill it up with water/air in X amount of time!
Sorry kinda of confusing.
 
:ohdamn: I stand corrected: reaction time does not count although I though it did for whatever reason. But, launching does and practice makes perfect..'cept no one's perfect
 
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