reducing lag in a 16g

[Dfish1]

i've got a 16g in a 97 gsx, I'd like a little less lag cause I'm going to be doing some autox and road racing. I've got a 9lb f/w, 2.5" downpipe & high flow cat into a 3" catback.
I don't have a fmic and I think I really need one, is there one that reduces lag or doesn't increase it? It seems with all the piping and huge core that it would increase lag. anybody experment with a wrc wrx style intercooler? would a 3" downpipe and cat help?
thanks,
david

 

[92awddsm]

The largr the ex./dp/o2 housing, the quicker the spool. If you are autocrossing, why dont you have a t28 instead of a 16g?

 

[Eagle_Summit]

you get lag with a 16g?

 

[Dfish1]

92awddsm: I just bought the car a week ago but it was a scream'n deal thats why it's got a 16g, I was thin'n the t28 but I don't really want to swap turbos cause the top end is just so much fun.

eagle: I'm not talking huge lag, but when I'm autoxing I'd like to more boost a little quicker cause i can't stay on it too long. I don't want anymore lag from an intercooler either.

keep in mind this will be a three event car, drag, autox and some track days. I know I can't be great in all of the events but I'd like to be competive in them.
first autox: sunday
first drag: oct. 10

 

[Kevin Jewer]

I think the 16g is already a great compromise for those 3 events. People have successfully autocrossed DSMs with much laggier turbos. Playing with timing advance can help, something DSMlink makes that easy.

 

[1fast97gsx]

my friend with an evo is here and just read your post ... he says "you're a fool ... a 16g doesn't have any lag compared to a real turbo and you are stupid ".

 

[CanadianTSi]

my 16g is at 15psi by 3000 rpm's, I would think when auto Xing you wouldn't ever really drop down much below that RPM ?

 

[TSIfreek]

Maybe the turbo is on its way out?? I would first try porting your manifold and 02 housing. Also make sure the wasitgate door is shutting and sealing. If its leaking it will hinder boost. 16gs have full boost by 3200- 3400 rpm depending on your exhaust set up. I would keep the 2.5 DP going any bigger may cause boost creep up top. If anything put a test pipe on it and be done with it. The 16g is perfect for what you want to do with the car. Also do you know if the turbo is clipped at all?? If its clipped it wont make full boost until 3600- 3800.

 

[n3gativerr0r]

If your gonna stay with a small turbo go with a smaller fmic or even a upgraded sidemount that flows well. You will get sufficient cooling without your response suffering much at all. As far as decreasing lag on a 16g I really dont know what to say with that. Tuning can help a good bit, make sure you dont have any exhaust leaks, and make sure the exhaust after the turbo is free flowing. A B16g should be hitting 18-20lbs right around 3000rpm some hit it alittle earlier some alittle later. If thats too much lag for you... you should look into selling your car and getting a good N/A performer.

 

[yo2001]

Take some timing out. that'll help the spool.

 

[Revolution]

i've got a 16g in a 97 gsx, I'd like a little less lag cause I'm going to be doing some autox and road racing. I've got a 9lb f/w, 2.5" downpipe & high flow cat into a 3" catback.
I don't have a fmic and I think I really need one, is there one that reduces lag or doesn't increase it? It seems with all the piping and huge core that it would increase lag. anybody experment with a wrc wrx style intercooler? would a 3" downpipe and cat help?
thanks,
david

Hey bro ,well their are tons of things you could do to make any turbo spool faster.
Take a look at my setup , I,, just like you'rself want to do all three,, but to be competitive in all three you have to address the three most important factors.

Usable power , total balance, over all weight.

I will sugest getting a tubulare exhaust manifold ,a 3 inch o2 and a 3 inch down pipe .By doing this you will free up all the restrictions from the hot side of the turbo.

It doesnt matter how you look at it you are going to spend some coin ,how much depends on how well you can search for a deal . In autocross every second makes a difference but in my opinion do as much competative driving as possible.

I will be joining a go kart league to better work on my line this winter .

The best upgrade is the nut behind the wheel .

P.s cams are a great way to add power.

 

[RedTurboEclipse]

you get lag with a 16g?

yea.. wat lag>?

 

[98spydert]

my friend with an evo is here and just read your post ... he says "you're a fool ... a 16g doesn't have any lag compared to a real turbo and you are stupid ".

Make your friend read the rule of "no personal insults to other members" before you relay his ignorant comments.

 

[Slipstream]

would a 3" downpipe and cat help?
thanks,
david

yep..any removal of restrictions will help spool faster...I'd also suggest porting everything.....the manifold, o2 housing, every nook and crevice..take it to a shop and have them do a number on the parts. between porting and 3" turbo back you should be in good shape for 16g spool times

 

[ItsStockOfficer]

3 inch o2 housing does as much for spool as the 3 inch downpipe, get rid of the cat as well, getting a maft translator helps as weel, as does al metal IC piping. My huge spearco core from turbo to TB has less retrictiion then stock by about 250%....3.5-1.5 psi.

 

[98spydert]

There's the answer; MAFT. More specificly, the 3" GM MAF set up as "blow through". That combo significantly reduced spool up time, more so than any other mod I installed.

 

[IMMORTALSPYDER]

Your turbo should be fine for autox. And by the way, the T28 has plenty of top end

 

[1fast97gsx]

Make your friend read the rule of "no personal insults to other members" before you relay his ignorant comments.

yea I know ... that's why I used quotation marks.

 

[Kevin Jewer]

Next time I think you're being an ignorant douchbag, I'll put it in quotes and say my friend said it.

Doesnt work like that

 

[1fast97gsx]

normally I wouldn't have actually responded like that but this thread is just plain ridiculous ... 16gs don't have lag!!! They are SMALL turbos!!! Get an all motor v8 if you want a lot of power and no lag!

 

[14.5 drift]

What's transient response like? I have a pretty small turbo (t25) but transient response is still pretty shitty. In first gear, floor it at 4k and i get full boost by 5.5k :thumbdown I want ball bearings

 

[dave99gst]

There's the answer; MAFT. More specificly, the 3" GM MAF set up as "blow through". That combo significantly reduced spool up time, more so than any other mod I installed.

thats what i was going to sugjest

 

[force inducted]

i have all the normal upgrades 16g fmic fuel pump exhaust intake piping an a bunch of other crap an nothin made more of a drastic difference as far as lag goes than the 3 inch gm maf with a tuned maf translator an the blow through setup ....mt evo 3 16g is on full boost 15 psi by 2800 rpm minimum it comes on boost so hard an quick it rips loose some real nice tires at 45 mph in second gear ....now im not saying thats all maf .. but it made a big diff

 

[1LE]

Is it tuned right? I was able to drop mine from spooling at 3200 down to 2800 by dropping 1% fuel under 4100 rpms... Might get a little knock from time to time, but it's a whole lot quicker!

 

[allturbo]

normally I wouldn't have actually responded like that but this thread is just plain ridiculous ... 16gs don't have lag!!!

The definition of lag is subjective, everyone has there own opinion on what's laggy or not. That being said, my cammed out 4g63 w/a clipped 16g definatley has more lag than a car w/ stock cams and a t25. T25's have no lag IMO, but my car does. Not as much as my cousins 50trim but it's still there.