BigT28 or BigT28

[bobby180360]

Alright I was looking into the BigT28's and I see there is the FP BigT28 and the Garrett BigT28 turbos out there. I was looking at them for more of a stealth thing, but which one is better, I looked though the forums but it seemed like it was kinda even between the two. The cfms are not to much different, but from what i can see is that the Garrett has a 12psi waste gate and the FP has a 17psi waste gate. so what does this mean it starts boosting where the waste gates are calibrated at? And any input would be nice i was planning to go with a big evo3, but i need to umm.... mess with ppl lets say thats why i was looking at these turbos.

 

[the_mork]

Your wastegate spring isn't generally all that important, you will be controlling boost with an mbc or ebc anyways so don't let the wastegate spring even influence your decision EXCEPT that 17 psi is really too high for a stock fuel system so that turbo should not be run on a car without a rewired/upgraded fuel pump and larger injectors and some way to control them but I think you might be mistaken on that number so check again.

 

[bobby180360]

Well the fuel mods are gonna happen dsmlink for sure as well, its just which turbo to go with. I have read up on the t28's and it seems that agp and fp's seem to be the more liked of all the t28's, but i had a lil trouble finding some flow numbers, i did see the post on here at one time, but i cant find it now.

 

[gsxgate24]

why not something along the lines of a 20g? or the g50? with the heat shields on it would give it somewhat of a stock look

 

[bobby180360]

I want to keep it some what low, hit like 350 hp and thats good. I'm not looking for to much over that just a little more boost, a second or two in the 8th mile, and keep it some what reliable.

 

[gsxgate24]

i think a g50 would be good for you. its a bolt on turbo. right on a 2g manifold. you do need an oil return kit though. its good for 400 and its always nice to have a little extra room just incase you want to go a little faster. you can always not push it to its max

 

[tbonitz301]

I also would personally go bigger. You could definetely get some more bang for your buck with a different turbo. Like a sleeper 16g or something along those lines. Also get all your supporting mods on the car first, and then strap a bigger turbo onIt will really pay off.Also a wastegate with a 17psi spring will be able to hold/control higher boost easier than one with a 12psi spring. At higher boost the 12psi spring will almost seem weak, and will not be able to function properly
Edit: One more thing---You will always want more

 

[the_mork]

ehh, a t28 is a good choice overall, I was looking at a t28 for a while but then I decided on an e316g and have been very happy with it. A big (or small) 16g wouldn't be a bad choice either as they have a slightly faster spool rate which makes them a superior turbo unless you are maxing out the e3. Another choice would be an M trim from slowboy which I've heard is a great street/strip turbo as long as you run an external wastegate but that throws both stealth and budget out the window.

 

[PieEyedPiper]

Those turbos don't resemble a stock unit at all though. Debate it if you like. The only stock appearing turbos out there are the T25 and T28's.

 

[tbonitz301]

Your right. How many people even know what there looking at though Damn j-pipes

 

[Anger890]

A few turbo's to consider would be the evo III 16g, the 18g SL2 from Forced Performance or the Sleeper 16g. While these do not conform to a 2g stock appearing turbo, you could always tell someone you "upgraded" to a 14b which is still technically a stock turbo.

 

[bobby180360]

well my main goal out of it besides stealth was trying to knock time off the 8th mile, i was thinking a little smaller turbo spools a little faster, then a bigger turbo to give me more power in the 8th. Not really looking for a quarter car just something a second or two faster in the 8th.

 

[bmoha2]

I love it. It does have the 17psi wastegate actuator which I also like. I have all the supporting mods done so I can run it no problem. I was trying to get my hands on a GarrettBigT28 killer turbo but I couldn't find one. The difference between the BigT28 and the stock T25 is night and day. Totally different. the stock fuel system can't keep up with the T28 at all. You'll need 550s minimum and a 190 lph fuel pump. I also did an aeromotive afpr and am saving for dsmlink. 22 psi isn't a problem with the BigT28. It spools up superfast and holds to redline!

 

[T is for TURBO]

I love it. It does have the 17psi wastegate actuator which I also like. I have all the supporting mods done so I can run it no problem. I was trying to get my hands on a GarrettBigT28 killer turbo but I couldn't find one. The difference between the BigT28 and the stock T25 is night and day. Totally different. the stock fuel system can't keep up with the T28 at all. You'll need 550s minimum and a 190 lph fuel pump. I also did an aeromotive afpr and am saving for dsmlink. 22 psi isn't a problem with the BigT28. It spools up superfast and holds to redline!

^Word.^

Some of you need to re-read the thread starters first post... You know, the part about how he wants to go for the STEALTH look. g50s and 16gs look nothing like the stock unit. Not to mension a FPBig T-28 can go toe to toe with just about any 16g on the market.

To give you an idea of the power I was making (no dyno numbers) but I was running the stock fuel system (stock tune) with the FP Big-T28 running 16-17 PSI, and the stock T-25 wastegate, and when I would do a hard pull, by the time I would get to the top of second gear the tires would start to rip loose. (FWD). It would pull HARD from about 3K all the way to redline. Boost didn't seem very linear with that turbo, it would climb "slowly" to about 8psi then BAM, it would shoot to 16-17 and it would hit hard!
I'll be running it at around 21ish psi when I get my motor back from AMS for a little while to see what I can get out of it, but I will eventually upgrade to a 50 trim.


-Shawn

 

[thiazole]

I used to have an FP-Big28 back in the day and I really like that turbo. Many people have trouble with the wastegate blowing open at higher rpms, though, because the turbine housing is so restrictive - this causes you to hit a certain boost when it kicks in, but then the boost level falls through the rpm range. The 17psi wastegate is adjustible so that you can tighten the preload to remedy this problem. I found that it needed a LOT of preload to hold lots of boost. Once I figured that out, my trap speeds jumped 8mph! Also, it doesn't matter how small your turbo is as far as your 1/8th mile times. Bigger turbos still run better 1/8th mile times than small turbos.

 

[bobby180360]

I used to have an FP-Big28 back in the day and I really like that turbo. Many people have trouble with the wastegate blowing open at higher rpms, though, because the turbine housing is so restrictive - this causes you to hit a certain boost when it kicks in, but then the boost level falls through the rpm range. The 17psi wastegate is adjustible so that you can tighten the preload to remedy this problem. I found that it needed a LOT of preload to hold lots of boost. Once I figured that out, my trap speeds jumped 8mph! Also, it doesn't matter how small your turbo is as far as your 1/8th mile times. Bigger turbos still run better 1/8th mile times than small turbos.

i was thinking more along the lines of a smaller turbo spooling quicker, giving me power just a bit quicker. unless i miss understood something i read.

 

[thiazole]

If you have a bigger turbo, you just need to launch at a higher rpm to get it to spool up. If it is a huge turbo, you can use "antilag" to get it to spool up on the line.

Here is a race between someone with a BigT28 (red car) and an PTE-6152 (blue car) which is a big turbo.
http://www.awdboost.com/seth/videos/PMISeth3.wmv

 

[COdsmer'96]

I figured the same thing also. Smaller turbo=quicker spool with the exception of ball bearings of course.

 

[bobby180360]

If you have a bigger turbo, you just need to launch at a higher rpm to get it to spool up. If it is a huge turbo, you can use "antilag" to get it to spool up on the line.

Here is a race between someone with a BigT28 (red car) and an PTE-6152 (blue car) which is a big turbo.
http://www.awdboost.com/seth/videos/PMISeth3.wmv

my car is AWD with an automatic so high rpm launches wont work...

 

[thiazole]

Automatics are usually easier to spool because you can put a load on the engine. You can still use antilag with an automatic as well. You need DSMLink or something similar to have antilag.

 

[bobby180360]

i know but i don't see bigger being better in my case.

 

[thiazole]

Here is a video of someone with a monster turbo and an automatic transmission. He built 15psi on the line and was running 1.3-1.4 second 60' times:
http://kigglyracing.com/media/Kiggly Racing 8.79 Record Pass.wmv

 

[thiazole]

I'm not saying bigger is better, but that bigger will give you better 1/8th mile times (if set up right). I'm also saying that automatics are more forgiving of lag. If you want a super fast spooling turbo that hits hard, then a BigT28 is a great turbo, as long as you aren't looking to make more than ~350whp.

 

[spaugh]

Seems he has his mind set on a T28 and is just wanting help on witch one to get. I have no experiance with the t28's, but I really like Forced Performance. I just picked up used FP sleeper 16. The choice is yours to make in the end not someone else's.

 

[niles]

As the thread starter is looking for a fast spooling turbo, my question is, if there is any difference between the FP BigT28 and the BigT28 you can buy from atpturbo for example?

I know even FP has changed the exhaust wheel to a lower blade count version on the "new" FP BigT28, so I guess the "old" FP BigT28 spools faster than the "new" version!?

Could a "non-FP" version of the BigT28 be the better choice, if spool-up time is more important than top-end power? Or are they all the same?