20psi 16g or hx35???

[gearhead07]

So to start off i am a newb so probably a nwebie question. My previous car was a supercharged cobalt ss. So turbos are kinda new with me. To start off i just bought a 97 gsx it currently has a big 16g and is at 20psi. My Question is i was considering geting a hx35 but if I am only running the same 20 psi where there be any hp difference? ... let me explain, in the cobalt world there is an upgraded lager s/c comonly called TVS. Now even if u run the same psi with that one.. because it is larger and will run higher boost levels eaiser, the charged air temp is lower resulting in more hp. And also i am asuming that the hx35 will take longer to spool???

My main reason behind my madness is to keep my eyes open and when a good deal comes by on an Hx 35 to buy it and put it on. My long term plans are to run it with the stock bottom end goes out then overhaul it. As of know it has 105k on it

 

[LiquidX]

Since your profile is not filled out then no proper guidence can be given. What are you goal with the car, what do you plan on doing with it?

Just because you can make more power with one turbo over another doesn't mean it's better for what you do. There will be a lot more lag between the two and 20psi isn't anything for the Holset. You really want to run 25+ to start getting that turbo to breath good.

If you don't have fuel mods and a tuning program, drop the boost back down to the stock wastegate pressure.

Please search on how our vehicles perform and what is needed to increase power.

 

[GRAVEDIGGER]

To start off i just bought a 97 gsx it currently has a big 16g and is at 20psi. My Question is i was considering geting a hx35 but if I am only running the same 20 psi where there be any hp difference? And also i am asuming that the hx35 will take longer to spool???

An HX35 even at the same pressure (20psi) will produce more power because it's generating more airflow. And because it's creating more airflow it will require some bigger injectors to support its appetite for air. Yes it will take longer to spool up though.

 

[BLINKY619]

mod list on it...

 

[JusMX141]

If you're never going above 20psi, the 16G is what you want.

If you have plans to go to 25psi and eventually 30psi, the HX35 is the beast for you.

 

[slow4g6392tsi]

At that low of boost I would definitely go with a 16G.

 

[gearhead07]

Yes there is a list of other things done to the car. The car is getting shiped to me as we speak so the exact detials are unknow at this time. But i will be getting recipets with all records and everything was always proftionaly done. So i am assuming that fuel sytem and tune have been done. And i am not a newb to cars i have been a GM auto tech for the past 4 years.

Im just asking is there diffference in 20 psi on one vs the other? is 20 psi on one turbo the same as any other turbo runing 20 psi?

BUt as far as goals it is a second vehicle so it is going to be a fun car and will be driven at the track probably regualarly. I plan on runing and moding the stock bottom end till it blows.

Thanks for the help

An HX35 even at the same pressure (20psi) will produce more power because it's generating more airflow. And because it's creating more airflow it will require some bigger injectors to support its appetite for air. Yes it will take longer to spool up though.

thank you

 

[slow4g6392tsi]

20psi might feel a little faster on the hx35 but not worth the lag for the small amount of gain. Now if you were comparing both at higher boost the hx35 will make much more power. Last time I saw a DSM with HX35 at 24psi it only made 346awhp which I feel is still in 16G territory.

 

[Shake_Zulla]

So to start off i am a newb so probably a nwebie question. My previous car was a supercharged cobalt ss. So turbos are kinda new with me. To start off i just bought a 97 gsx it currently has a big 16g and is at 20psi. My Question is i was considering geting a hx35 but if I am only running the same 20 psi where there be any hp difference? ... let me explain, in the cobalt world there is an upgraded lager s/c comonly called TVS. Now even if u run the same psi with that one.. because it is larger and will run higher boost levels eaiser, the charged air temp is lower resulting in more hp. And also i am asuming that the hx35 will take longer to spool???

My main reason behind my madness is to keep my eyes open and when a good deal comes by on an Hx 35 to buy it and put it on. My long term plans are to run it with the stock bottom end goes out then overhaul it. As of know it has 105k on it

Well do you like Apple's better or Orange's? Without telling us what you want out of your car it's hard to say what one is better for you. The 16G is an internal wastegated turbo and the hx35 is an external so some modification and extra parts will be needed. Are you building a car for the 1/4mile? If so this would be a valid choice (hx35). If you are building for autocross or just having a fun DD this is not the turbo for you. Reason being is it spools at between 3000 and 4000 rpms. If you arn't building a 1/4 mile car you probably want a more consistant power band and a turbo that will spool faster.

 

[Tanro]

If your planning on going for more power later go with the HX35. It will support more boost than the 16g.

If you dont think you will wont to build the car to support the HX35, then stay with the 16g.

Yes the HX35 Will create a bit more airflow at that 20psi than the 16g, but the increased lag will offset any increased airflow at the same boost pressure.

With turbos it is a bit different ballgame. Turbos have boost lag where superchargers don't. But yeah, they do follow the same principle that bigger turbo/supercharger at the same pressure follows more air.

 

[GRAVEDIGGER]

The 16G is an internal wastegated turbo and the hx35 is an external so some modification and extra parts will be needed.

Not necessarily
http://www.dsmtuners.com/forums/tur...tallation-holset-hx35-w-bep-bolt-housing.html

 

[Shake_Zulla]

Yes there is a list of other things done to the car. The car is getting shiped to me as we speak so the exact detials are unknow at this time. But i will be getting recipets with all records and everything was always proftionaly done. So i am assuming that fuel sytem and tune have been done. And i am not a newb to cars i have been a GM auto tech for the past 4 years.

Im just asking is there diffference in 20 psi on one vs the other? is 20 psi on one turbo the same as any other turbo runing 20 psi?

BUt as far as goals it is a second vehicle so it is going to be a fun car and will be driven at the track probably regualarly. I plan on runing and moding the stock bottom end till it blows.

Thanks for the help



thank you

Well diff turbos can run diff psi based on a lot of things. The wastegate is the main thing that regulates the psi. So a smaller turbo might max out at 20 psi but because it takes less force/volume to build psi it spools faster. You can run a bigger turbo at 20 psi even though it could run 30psi only difference is it's bigger and made for higher psi so it takes more volume (aka rpms) to spool.

 

[gearhead07]

It is gonna be prob more of a 1/4 mile car. My driving record isnt to good so i have been trying to drive carefully... . But anywho like i said before im not aware of the exact details but i do know that the previous owner ran a 12.75, but 10 years ago. My goal is to push it thill it breaks and keep on going i would realy like 11s.

So in other words... later on i will definatly be increasing the boost levels.

 

[Guzman08]

well dont start getting big -headed until you get ## car, u need to make sure everything is up to date on it. drive it for a couple of months to see if it acts weird. after that i would say start modding " correctly". and by shipped? what do u mean , where is the car?? :/

 

[Shake_Zulla]

Not necessarily
http://www.dsmtuners.com/forums/tur...tallation-holset-hx35-w-bep-bolt-housing.html

^Touche my friend... touche
It would still need modification and IMO I would not run more than 20psi on a internal wastegate, I know there are people out there who do, however, I would be keepin my eyes on the boost gauge not the road.

 

[gearhead07]

well dont start getting big -headed until you get ## car, u need to make sure everything is up to date on it. drive it for a couple of months to see if it acts weird. after that i would say start modding " correctly". and by shipped? what do u mean , where is the car?? :/

Yhea well that is one thing i was going to be doing was making sure all fluids are new and timing belt was done ect.

But yes shiped, on a truck across the country. From Oregon to me in Pennsylvania. But im not worried its coming from my uncle he is like 40 and is getting to old for it so he cut me a sweet deal. He has had it for the past 10 years and has EVERY record since it has been new, he is the second owner. And him and the previous owner made bank so it was well serviced.