choice of turbo matter?

[LWizzle11]

i'm looking into buying a turbo. i'm gonna replace the pistons and rods, but other than that i'm hoping to not change a whole lot on my engine. planning on pushing 8 psi. If i'm only looking for 8 psi does it really matter what turbo i chose? (420a)

If anyone can help i'd greatly appreciate it.

 

[gsx7707]

search your soul boost is addictive you say 8lbs but that want be enough ive been through 3 turbos everytime going larger im currently working on my hx35 already thinking i should have went hx40 goodluck gotta love dsms

 

[whe3ls]

you most likely want a smaller turbo. or something that spools quickly like a bb turbo

 

[420a_turbo]

I have a Garrett T3, relitively small and it works great. It is a .42/.48 A/R, nothing too large but has full boost at 3600 and maintains pressure until about 5900, which is close enough to red for me. I always keep my boosted cars running around 8-12PSI, and thats seems to be a good reliable amount of boost. You wont wanna go past 8 if you dont build your lower end with better internals.

I also have a .42/.50 A/R on my 1998 GS, great build as well. That old saying really applies to our cars. The farther away from stock you get the more you lose reliability. I have moderate goals, 250-300ish and DD'able from my cars. Thats exactly what I have with my setup. I have driven about 30k miles on one motor with minor issues, and almost 40k on the other with no issues. Im going to boost my Accord next witht the same game plan!

I had to change the filter a few times on the Missing Link, ground went bad, needed a wheel hub/bearing, clutch once other one is still running OEM clutch, injector failed once, fuel filter once-pump once, ASD/MFI relay went out on both cars but nothing really major has gone wrong. I did a full rebuild on both motors prior to boost and Im sure that helped.

 

[boosted97RS]

Imo, I loved my HRC Super 16g when I was boosting upwards of 10-12psi on a built motor. It pulled very nice. The garrett turbos mentioned above also work nicely so it's really your decision. For up to around 16-18psi, I recomeened the Super 16g, turbonetics t3/t4 or Garrett t3 turbo for their quick spooling characteristics and decent power potential. If you looking to make more power down the road you can always have your Super 16g sent in an rebuilt by HRC to Super 20g specs or go to a pte sc61 turbo. Another turbo that works very well with our motor is the Garrett gt3076r. But for lower boost pressures like your looking for I doubt it would be worth the $1200-$1400 you would pay for it.

 

[Dsmj89]

For 8 psi you can just toss in a t25 or 16g and call it a day. They are good low boost turbos.
You said you are replacing the pistons and rods, but keep in mind, a bigger turbo at 8 psi won't be very efficient, meaning you won't be making the turbo work hard, but either will it be making power.
You want useable power. You can just toss in a t25 and custom-make intercooler piping to work with and you will be fine doing 8 psi on your stock internals, not to mention, your typical t25 can only hold tops 10 psi in the end, so it's a perfect turbo for your car and boost level.

 

[boosted97RS]

Very true. Lol, I only mentioned the higher priced turbo's and totally forgot about those. The t25, evo III 16g, big 16g and more than likely 14b turbo would suit your needs.

 

[Locke]

OP won't be able to use the conventional manifold options when using a T25, 14b, E316g, etc... because they are MHI flanged, whereas mass produced manifolds for the 420a are flanged for T3 turbo's.

I will agree 100% though that for ~8psi, a small turbo such as the T25 blow-dryer or 14b would be about perfect. 16g would work great as well, and the S16g is T3 flanged. I've never had a clue why so many turbo 420a guys want to use such large turbo's and operate them so far beneath their efficiency range. All the lag, and none of the benefit.

 

[420a_turbo]

OP won't be able to use the conventional manifold options when using a T25, 14b, E316g, etc... because they are MHI flanged, whereas mass produced manifolds for the 420a are flanged for T3 turbo's.

I will agree 100% though that for ~8psi, a small turbo such as the T25 blow-dryer or 14b would be about perfect. 16g would work great as well, and the S16g is T3 flanged. I've never had a clue why so many turbo 420a guys want to use such large turbo's and operate them so far beneath their efficiency range. All the lag, and none of the benefit.

Exactly. My setups are moderate. They scoot for the little boost they are running, and more importantly they use the powerband correctly. I would suggest a thread on learning about the CFM of your motor, and the relationship that number has with the efficiency of your turbo. Then if we could teach people how to use this information to do an accurate/reliable build maybe we could help some of these noobs

If you just want boost, and a decent power gain a T3 is kickass! Most people try and dog them, but they make good-reliable power at lower RPM's which is a great combo for a DD'able 420a. I think people want too much boost out of their DD and find themselves shifting at 5k just to go to the grocery store because of the "Boost" they dreamed of having happens to have tremendous lag! Then they complain about their car always breaking down.......

 

[rstare]

Well said, 420a turbo. Here's a good place to start.

TurboByGarrett.com - Turbo Tech103

 

[420a_turbo]

Well said, 420a turbo. Here's a good place to start.

TurboByGarrett.com - Turbo Tech103

Well hopefully the lack of posts on this thread is due to your post. I hope everyone that read this got to your link and was like,"Oh, Oh wow. I was SOOO wrong. That is the best tid bit of information I ever read about turbos. There is no more need to post, I understand now."