16g Supporting Mods

[97GSTee]

I have a 97 gst with a stock motor. I have a megan racing 2.5 inch test pipe with an hks catback....next i want to get a new downpipe and then an evo3 exhaust manifold. After ive been thinking about a big 16g, but im wondering...what supporting mods do i need, or would be recommended? thanks

 

[rarson]

3200 is great. The 14b isn't going to spool much faster, if at all.

Adding fuel without adding air isn't going to make more power. You can't just add fuel and expect the car to make more power while it spools. Otherwise, no one would be running any turbo and we'd all just keep adding fuel to the stock engine until we hit the power that we wanted.

I see you say you're running a 2g install kit. So obviously you're running a 2g (I assumed you were driving a '92 since that's what it says next to your name). The T-25 is a joke. Sure, it spools faster than anything else but that's because it's barely pushing any air. If you want power, you have to step up to a larger turbo. That's just the way it is.

My problem with the 16g is that it drops off at high RPM. I wish it would pull a little bit better to 7k. But that's just the world of turbochargers.

 

[redline2k6]

the Evo 3 is a great street turbo long last dependable, and flows well, as well as minimal lag. As far as supporting mods to get the most out of it hard intercooler pipes, fuel pump (190 is fine, 255 is great if you plan to go bigger) injectors you can get a set of stock evo ones cheap and work great, a good blow off valve helps. Super AFC is a good basic tuning tool but ull need a data logger and a wideband to get the most out of your tune hope this helps.

 

[toojung2die]

maybe the big16g isnt the best way to spend my money...what other turbos would you recommend...i don't want to have to change all the internals...maybe one day down the road

I hope I don't regret saying this but you asked. I asked myself the same question four years ago and I decided to buy Forced Performance's Big28 and I have no regrets. There are volumes written in these forums about 16G vs T28. There are more 16G's out there than T28's but there's something to be said in favor of each. When I was in your position the bolt-in stock replacement virtues of the T28 were important. I didn't have to change much but the basics to enjoy having a real high performance turbo. It's ability to keep up with my plans for the future were equally important. I wasn't trying to build a monster but a car with impressive performance. Both the 16G and T28 will achieve those goals. The T28 wins the spool up contest hands down. It's a very satisfying street turbo that will give you satisfying track performance too. I have the time and resources now to go for an even bigger turbo if I wanted one but I'm still very happy with the FP Big28. I'm focusing on upgrades other than horse power; like handling. There is no more popular topic on these forums than "What turbo should I buy?". I think you should include the T28 in your consideration. Have fun doing your research.

 

[rarson]

The T-28 isn't a bad turbo, if you're looking for fast spool with decent power (compared to the T-25). But an EVO III 16g will beat it hands down when it comes to power production.

But most FWD guys seem to like a bit of lag to help them get the car to hook up better, so I guess I'm a little surprised to see a GS-T owner recommend such a fast spooling turbo.

 

[toojung2die]

The T-28 isn't a bad turbo, if you're looking for fast spool with decent power (compared to the T-25). But an EVO III 16g will beat it hands down when it comes to power production.

But most FWD guys seem to like a bit of lag to help them get the car to hook up better, so I guess I'm a little surprised to see a GS-T owner recommend such a fast spooling turbo.

The OP asked about other turbo options with a minimal amount of modifications. The T28 is a direct bolt in replacement for the stock T25 and therefore I think it is worth mentioning. I won't be participating in another 16G vs T28 debate. You'll understand. I'm not going to disparage the 16G in any of it's forms. It's unarguably a great turbo so I'll write about my experiences with what I know.

I have an auto transmission so even the small added lag of a T28 makes a noticeable difference over the stock T25 from a standing start. I can not "hook up" with my present transmission because the stock torque converter stalls before the T28 hits boost. I'm a lazy dog off the line. I don't mind because I like my turbo to hit boost fast when I'm already moving which is most of the time. I can fix the launch issue later if I want to drag race. Manual transmission GST drivers may find the fast boost of the T28 hard to deal with from a standing start. What I like about the T28 is the power is there instantly no matter what speed I'm moving on local streets or freeways. I hold 20 psi to redline and the stock T25 couldn't hope to match that.

The T28 has many advocates and I'm among them. It deserves it's place in the turbo choices line up.

 

[haioku-rocket]

i agree on that part but i do not agree with the 190 what is he going to do once he reaches his goals of the 16g how he has already boughten a 190 and now he has to buy a 255 its a waist of money that he doesnt need eventually he will need to get a fpr and a 255 so why not just get it now

A quality regulator and install kit is damn expensive. Take a look at the aeromotive unit and everything you need to install it with. Price gets expensive quick. Fuel pumps are only 90 bucks man what are you talking about?

Your still way wrong on the stock regulator. We have ran 24 PSI on a TO4E 60 trim on a walbro 190 pump and a stock regulator. It is WAY more than he needs at this point. Trust me I know.

 

[haioku-rocket]

All I'm saying Is 3200 is not great by any means. That what I'm calling lag. I need more fuel to put more down until boost hits. 440's suck.

3200 not great? what are you kidding for a 16g?...man you on crack!

I hit full boost (22 psi) @ 3400 on my old 16g. I currently run 26 psi @ 4100 with FP2s on my TO4E, and I still think its responsive.

 

[rarson]

The OP asked about other turbo options with a minimal amount of modifications. The T28 is a direct bolt in replacement for the stock T25 and therefore I think it is worth mentioning. I won't be participating in another 16G vs T28 debate. You'll understand. I'm not going to disparage the 16G in any of it's forms. It's unarguably a great turbo so I'll write about my experiences with what I know.

Oh, no, I wasn't intending to compare the two or disparage the T-28 at all. What I was trying to say is that they're really two different turbos for two different applications, and they're both good turbos. The T-28 is probably better for someone who wants faster spool and a no-fuss install, where the 16g might be a better choice for someone looking for a little more power at the cost of slower spool. I agree with everything you said about the T-28.

I'm a lazy dog off the line. I don't mind because I like my turbo to hit boost fast when I'm already moving which is most of the time.

That's what I was saying. A lot of the FWD guys like to get moving before their boost hits, so they like a little lag. I was just confused because I figured the T-28 would spool even quicker than the 16g, and not give enough lag for a FWD car. But the answer seems to be the auto tranny that you're using. I think traction would be more of an issue for someone with a manual who is slipping the clutch out of the hole.

Manual transmission GST drivers may find the fast boost of the T28 hard to deal with from a standing start.

Yeah, that's what I meant.

The T28 has many advocates and I'm among them. It deserves it's place in the turbo choices line up.

Definitely. I wasn't trying to turn anyone off, but I figured (for a manual, anyway) it might be better suited to an AWD car. If you want a drop-in turbo though, it's hard to argue against the T-28.

 

[rarson]

3200 not great? what are you kidding for a 16g?...man you on crack!

I hit full boost (22 psi) @ 3400 on my old 16g. I currently run 26 psi @ 4100 with FP2s on my TO4E, and I still think its responsive.

Yeah, my small 16g doesn't hit full boost at 3200 RPM, not since I put the cams in the car, but it still spools plenty fast (maybe 3500? hard to tell, the damn thing moves pretty quick once boost hits). Ridiculously fast compared to most larger turbos.

 

[Sam@RRE]

Your only choice if you dont wanna spend the dough on support mods, is buy another T25 for a million dollars. T-28 vs 16G is really your pref. Though its bolt on, and you dont need an install kit for the T28, it costs about as much as a 16G +install kit. In the end your still shelling out the same cash. The guy who said 3200rpm 22pis is laggy. You dont know what your talking about. I'm already seeing 10psi at like 2800rpms. Your car Idles at 800rpms. From Idle to 2800 is you making it 5ft from a standstill. About 2 sec. In a race it hits full boost by the time I take my foot off the clutch. With the Antilag 2step combo, I get 15psi at a standstill and by the time the tree is green, I'm at 22psi. If you drag race you know how much time is between the time you react to the time the tree goes green. By no means is that lag. Whichever you chose whether it be a t28 or 16g variant, you will laugh at the t25 you have now and wonder if that was really even a turbo or an exhaust driven blow dryer.

 

[noypiC50]

really good explanation! can't believe he said full boost at 3200 rpm is laggy