What is the type s bov for?

[95 gsturbo]

I just got a bov for my eclipse, my friend said it was a good one, and that I got a deal for 100 bucks? Well, it has this screw in middle that says soft and hard. Which way should I put it for a 96 spyder turbo? Because I bought it for my friends bday. What will it do?
P.s Will a 96 spyder turbo auto beat a 95 gst with 5 speed? What is the difeerrence between the two? Thanks

 

[SnowWhite]

I have a type S on my car and if you turn the screw to the softer side, you won't get so much compressor surge which is bad for your turbo if you have it. I don't know too much about it so if you want, put compressor surge into the search key and you will get some answers.

If you have the same drivers, the GST will beat the Spyder mod for mod because the Spyder is heavier and, I might get flamed for saying this, but in my experience, people with manuals usually are a little quicker without any drivetrain mods done to the automatic.

 

[95 gsturbo]

Umm I would like to know more about it and the compresser surge, it is a greddy by the way. Oh and the spyder is a convertible, why does it weigh more?

 

[PaleDSM]

The bolt on the top adjusts the spring pressure in the bov. Spring pressure determines how easily the bov will open at throttle lift. The more spring pressure you have the less likely it is to open up at low throttle lift which can give you some compressor surge. If it is set too light the bov will open under full boost which is a big problem as well. You have to find the right spot which is done by trial and error while listening to the bov.

The spyders are heavier because of the additional reinforcements and bracing needed in a convertable.

 

[JiveMasterT]

yeah, you just gotta toy with it to figure out if it is not letting enough pressure out, or if it is retaining too much. my friend's type s sounds like a sneeze when its working properly. if its too hard you will hear a fluttering noise which is compressor surge... the pressure bouncing off the throttle body and hitting the turbo fan blades.

btw, the regular gst 5 speed will win, if its all stock for stock cause it weighs less.

also, for the future, try not to post questions like that as bench racing is not encouraged here.

 

[1fast97gsx]

Oh and the spyder is a convertible, why does it weigh more?

um... because spyders are heavier period. They have additional supports underneath the car to strengthen it which weigh the car down. I wouldn't be suprised if a spyder weighed 200 lbs more than a hard top.

 

[JiveMasterT]

um... because spyders are heavier period. They have additional supports underneath the car to strengthen it which weigh the car down. I wouldn't be suprised if a spyder weighed 200 lbs more than a hard top.

they have the supports underneath and the convertible top motor as well. they also have some bracing in the trunk area. why do you think mitsu put a 2.4L in the NA spyder? its so that it wouldnt be a complete pig. i think the NA spyder and the NA eclipse are similar in track speeds stock for stock but only cause the NA spyder has more power.... correct me if im wrong?

 

[98spydert]

um... because spyders are heavier period. They have additional supports underneath the car to strengthen it which weigh the car down. I wouldn't be suprised if a spyder weighed 200 lbs more than a hard top.

WRONG, your GSX weighs the most. 100lbs hevier than the spyder and 200lbs! heavier than the GS-T. It's not only the drive train loss difference loss that gives us the advantage but the weight too.

What do you think weighs more? The reenforcement for the chasis or a huge chuck of glass for the hatch, a steel hatch, and a steel roof w/ or w/o another chuck of glass for a sunroof PLUS all of your extra running gear?

 

[98spydert]

The bolt on the top adjusts the spring pressure in the bov. Spring pressure determines how easily the bov will open at throttle lift. The more spring pressure you have the less likely it is to open up at low throttle lift which can give you some compressor surge. If it is set too light the bov will open under full boost which is a big problem as well. You have to find the right spot which is done by trial and error while listening to the bov.

The spyders are heavier because of the additional reinforcements and bracing needed in a convertable.

The valve will not open under boost as long as the top nipple is connected to a good manifold source. The pressure on the top diaphram keeps the valve closed under boost, not the weak little springs. Take the screw out and then do a boost leak test w/ the top nipple pressurized if you don't believe me.

 

[GPTourer]

i think the NA spyder and the NA eclipse are similar in track speeds stock for stock but only cause the NA spyder has more power.... correct me if im wrong?

I think they have the same peak hp, but the 2.4 has more torque, but its only like 5-8lb/ft more.

 

[PaleDSM]

The valve will not open under boost as long as the top nipple is connected to a good manifold source. The pressure on the top diaphram keeps the valve closed under boost, not the weak little springs. Take the screw out and then do a boost leak test w/ the top nipple pressurized if you don't believe me.

I was under the impression that the pressure in the intercooler pipes and the pressure supplied to the top nipple via pressure from the intake manifold are pretty close and the spring pressure is what overcomes that balance to hold the valve shut.

 

[JiveMasterT]

WRONG, your GSX weighs the most. 100lbs hevier than the spyder and 200lbs! heavier than the GS-T. It's not only the drive train loss difference loss that gives us the advantage but the weight too.

What do you think weighs more? The reenforcement for the chasis or a huge chuck of glass for the hatch, a steel hatch, and a steel roof w/ or w/o another chuck of glass for a sunroof PLUS all of your extra running gear?

care to line them up then? i already have smoked not one, but 2 spyders with similar mods. unless they were horrendous drivers, the spyder is the slowest of the turbo models. besides, i take it that if you are buying a convertible its not because you want a solid and fast car to take to the track cause with a convertible at the track you need all sorts of extra safety equipment. but then again thats not what this thread is about.

proofs in the pudding dude... line up a gst, gsx, and a gst spyder and the spyder is going to come in last. the gst is lighter than the gsx which makes up for the fact that it cant get the power down as easily as the gsx can, which is why the two of them are mostly even in the 1/4 until you start factoring in big turbos. the spyder has more weight than the gst and doesnt have the ability to get the power down like the gsx can.

 

[98spydert]

Well nothing was asked or stated about a comparison for track use, 1/4 mile times or especailly who you've beat.

As for the original question, yes, the GSX is heaviest.

AWD Eclipse or Talon MT: 3157 lbs.
Turbo Spyder MT: 3053 lbs
FWD turbo Eclipse or Talon MT: 2921 lbs.

Edit: and from a roll, by the numbers, a car with less drive train loss and less weight (read: the Spyder) will take the other (read: AWD), both having the same hp and tq.

care to line them up then?

And I KNOW that^ wasn't you challenging me... If so, sounds like the end of your Spyder crushing days to me

 

[98spydert]

I was under the impression that the pressure in the intercooler pipes and the pressure supplied to the top nipple via pressure from the intake manifold are pretty close and the spring pressure is what overcomes that balance to hold the valve shut.

That's a good theory. Even with the screw all of the way out and removed, the springs are still compressed and would be overcoming the balance if that's the case. Anyone who has takin one apart can tell you how hard you have to push down on the assembly to compress the springs and reassemble the Type S. Doesn't matter how the screw is adjusted, the valve shouldn't open with the same pressure on each side (AND the springs pushing closed).

I believe the springs are there in order to keep the valve from opening at idle, I'm not sure though. Since the valve isn't DSM specific, they do have to worry about the valve opening at idle and sucking in unfiltered air on a "vented" application.