3400 turbo.

[ericjon262]

yes but I dont want to deal with the bet side or constant boost at highway speeds. im very picky I know lol. by the time I add brakes and 18s It will slow it down some. plus a cage.. then I will need power to make up for it and the lsd rebuild should help with traction a LOT. really not much else I can do to the chassis other than rwd.. or custom springs/coilovers

whats every ones take on billet vs cast?

put a bypass valve in it, no more boost on the freeway...

[Guest]

yes but I dont want to deal with the bet side or constant boost at highway speeds. im very picky I know lol. by the time I add brakes and 18s It will slow it down some. plus a cage.. then I will need power to make up for it and the lsd rebuild should help with traction a LOT. really not much else I can do to the chassis other than rwd.. or custom springs/coilovers

whats every ones take on billet vs cast?

Drive a supercharged vehicle before making assumptions.

You won't have constant boost on the freeway, unless you constantly have your foot into it. At cruising speeds the throttle is barely open, so there is not much air to compress.

[Alxsmt]

good to know, I didnt know that.

no offense, I appreciate the opinions! but this is about turbos. just trying to learn how to size them and make them work how I want, or close to it. im not using a supercharger unless somebody has one thats ready to bolt on. and its a steal. I was thinking about that route in the past but the whole mounting/belt part draws me away. really not much room on that side and I dont want to make it worse. yes the whole setup might take up less space but then I still have my headers I hate (cant justify making an NA set and I already have almost everything). plus all that extra space where the battery once was. I prefer exhaust work. I have driven a few GTPs, years ago.

back to turbo maps. might be a stupid question. I think I have them figured out a little better. been at this all night lol. im messing with the squirrel performance calculator. I know its just a rough calculation and there are so many variables but at 200hp its saying I will have .1lbs of boost. I make more with no boost. 7psi is 325hp. say I make 325 at 5lbs. how would that move the map? just want an idea of how this changes. assuming its very minimal.

thanks,
Alex

[Alxsmt]

http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&item=130830583661&fromMakeTrack=true

any thoughts on this?

http://www.squirrelpf.com/turbocalc/index.php?version=4&target_peak_power=325&pr_ref=14.696&engine_disp=3.4&engine_disp_factor=0&target_af=12&bfsc=0.43&max_ic_loss=1.7&rpm_redline=6900&rpm_peak_power=5500&rpm_max_boost=4000&rpm_min_boost=2500&vol_1=89&vol_2=93&vol_3=90&vol_4=87&vol_1=89&vol_2=93&vol_3=90&vol_4=87&intake_temp_1=90&intake_temp_2=120&intake_temp_3=135&intake_temp_4=140&turbo_n=1&map_sel0=62

and

http://www.squirrelpf.com/turbocalc/index.php?version=4&target_peak_power=325&pr_ref=14.696&engine_disp=3.4&engine_disp_factor=0&target_af=12&bfsc=0.43&max_ic_loss=1.7&rpm_redline=6900&rpm_peak_power=5500&rpm_max_boost=4000&rpm_min_boost=2500&vol_1=89&vol_2=93&vol_3=90&vol_4=87&vol_1=89&vol_2=93&vol_3=90&vol_4=87&intake_temp_1=90&intake_temp_2=120&intake_temp_3=135&intake_temp_4=140&turbo_n=1&map_sel0=188

[TGP37]

put a bypass valve in it, no more boost on the freeway...

Thing is a turbo will boost mpg on the highway. The SC still has parasitic loss even with a bypass (though not as much).

http://cgi.ebay.com/ws/eBayISAPI.dll...MakeTrack=true

any thoughts on this?

http://www.squirrelpf.com/turbocalc/index.php?version=4&target_peak_power=325&pr_ref=14.696&engine_disp=3.4&engine_disp_factor=0&target_af=12&bfsc=0.43&max_ic_loss=1.7&rpm_redline=6900&rpm_peak_power=5500&rpm_max_boost=4000&rpm_min_boost=2500&vol_1=89&vol_2=93&vol_3=90&vol_4=87&vol_1=89&vol_2=93&vol_3=90&vol_4=87&intake_temp_1=90&intake_temp_2=120&intake_temp_3=135&intake_temp_4=140&turbo_n=1&map_sel0=62

and

http://www.squirrelpf.com/turbocalc/...1&map_sel0=188

The DBB option is not a good match. The link above however is a great match. It will allow you up to 13-14 psig before you start having efficiency losses.

I like the first link turbo map.

[Guest]

Thing is a turbo will boost mpg on the highway. The SC still has parasitic loss even with a bypass (though not as much).

A turbo will NOT in anyway shape or form increase economy. What a turbocharged engine has the ability to do is have the economy of a much larger and more powerful engine. A turbo, no matter how you look at it IS a restriction in the exhaust.
Many times when someone installs a turbo and claims increased economy, it can be followed back to an improved tune of the engine, that was not performed prior to the addition of the turbo.

[3400-95-Modified]

A turbo will NOT in anyway shape or form increase economy. What a turbocharged engine has the ability to do is have the economy of a much larger and more powerful engine. A turbo, no matter how you look at it IS a restriction in the exhaust.
Many times when someone installs a turbo and claims increased economy, it can be followed back to an improved tune of the engine, that was not performed prior to the addition of the turbo.

I can vouch for that... My turbo Legacy will perform as if it has a larger engine but it does not have better MPG than a n/a version of that engine, but it will have better MPG than a larger engine that can put out the same amount of power, that's the only improvement.

But that's not what this thread is about... and I kinda knew this was going to turn into a SC turbo debate eventually.

[TGP37]

ehh, wasn't trying to debate. I just always believed tapping into exhaust energy while cruising helps the engine run more efficient. Which in turn makes better mpg when cruising (not in boost).

two engine of the same, one has a turbo. The turbo should get better mileage on the highway as exhaust energy is used versus being lost to atmosphere.

I probably wouldn't of debated this except it goes against much of what I know.

[3400-95-Modified]

The exhaust energy isn't helping the air though not at cruise at least... 90% of the time cruising on the highway you still are producing vac, so if anything MAYBE the intake track is just a wee bit less restrictive than it normally would be but I don't think its enough to make a significant difference...

The typical turbo install on modern vehicles these days are simply there to make a 1.8L or 2.0L engine get out of its own way when you stomp on the gas and when you do that the engine goes pig rich to protect against detonation and uses more fuel than its N/A counterpart would at the same condition. It's the sheer fact that at highway speeds its simply a tiny 1.8L engine so there isn't all that displacement to feed so it gets better mileage than the larger n/a engine options, it's not the addition of the turbo doing it.

I can not match my wife's mileage with my car and that's even if she drives mine she can't match it. Displacement wise they are exactly the same EJ255 engine, Mine is the DOHC turbo and her's is the SOHC N/A version. She also has 35k miles over me and still gets better mileage. And yes stuff is done to mine but its all WOT only changes... Cruise boost tables stayed the same as well as cruise timing tables so my mods shouldn't affect highway mileage.

[TGP37]

Well, your input I trust considering your skill level I've noticed over the years on this forum.

Though I want to point out exhaust gas is still expanding as it leaves the cylinder. Surely this energy is utilized in the turbine and thus reduces pumping losses in the intake.

So many variables......

[3400-95-Modified]

Well like I said it will to an extent, but if you have a vac gauge and it's still reading negative pressure then all the turbine is doing is helping the air up into the intercooler, so it's helping draw the air in through the filter then after that it still has to be pulled by the engine, otherwise you wouldn't be registering negative intake pressure.

As soon as I hit -10in on my vac gauge my MPG drops below the 20mpg mark (instant read out) and anything positive is in the teens if not single digits.

[TGP37]

Yeah, I see what you mean about the vacuum. Thinking about it, the vacuum should keep the compressor wheel spinning. Counteracting what ever benefit.....

In the end, can't argue with real world results.

[Alxsmt]

ok I was thinking it was good too. I posted the 2nd one because it had more specs listed.

Im thinking about buying that one on ebay.
TURBO 60-1 / F1-62 .58 A/R TANG those are the specs they give you for the first map (I think lol, from turbonetics.com)

This turbocharger features a 60-1 compressor. These turbochargers are some of the most versatile units made because of the unique marriage of air flow and packaging size. Best suited to be used in applications under 22 psi, the 60-1 will comfortably make 425-625 HP and still respond well in street use. The F1-62 turbine wheel is the largest T3 turbine available. Turbonetics exclusive F1-series turbine wheels feature a 10-blade design and tall tip height configuration to maximize the exhaust gas energy and keep back pressure low. This turbocharger also feature Turbonetics patented Ceramic Ball Bearing system. Turbonetics exclusive design is made with almost indestructible silicone-nitride ceramic balls.


the ebay information
The listing is used Turbonetics 60-1 with only 8k miles on it. The turbo was swapped out with no issues just testing different setups. The specs are T04B 50 AR Compressor Housing with 60-1 wheel with standard 360 race bearing journal with water cooled housing. The turbo has a larger .82 AR turbine housing with a Stage 5 wheel to flow more exhaust up top. The Turbo was on a 3.0 liter motor with forged internals. The turbo has some scratches from the rubbing on lines etc with very low miles on it. Message us for further questions.

EDIT: now im lost. I think im getting turbos confused with eachother.. turbonetics and garrett both have the same turbo, with the same map? turbonetics has confusing labeling too.. hmmmm


I did email them to see if they had a map for it. waiting on a reply

how do you think what they did will affect how the turbo for my application?

also, how do you figure out spool time?

thanks,
Alex

[timg]

The 60-1 hi-fi is a good match. The turbine side is T3 which should make it spool fairly quickly. The 60-1 compressor wheel is a great match for this size engine. This is a nice, mid-sized turbo that is probably perfect for most.

Tim

[Alxsmt]

how would the 50 ar compressor work compared to a 59 compressor housing? all I can seem to find info on is the turbine housing..

right now the compressor is one thing thats holding me back for buying it. the other is im not sure how it changes the map, or is this just how it spools?

this is what the guy on ebay said
I am not certain about what the GT35R wheel did versus the E housing or even the S surely the turbo will build little quiker with the smaller housing and maybe come in 25 hp less from my readings when I bought the turbo. I used it on a smaller V6 and I was shooting for 600hp streetable setup. The turbine side will blow really nice with the stage 5 Q trim wheel to help for the larger power up top. Joey

not sure if im following what he said