Sprintex 335 Testing & Progress

[Ultramaroon]

Originally Posted by SprintexUSA

Correct. A recirculation valve is the opposite of a BOV. Ours is open under vacuum and closes under boost. It does not vent "excess boost" because there isn't any excess boost. The only time you might get overboost is if you downshift into the wrong gear and hit 10k rpm. By then, excess boost is the least of your worries.

What happens if you crank up the spring pressure? Serious functional question.

edit: nvm lazy question. sorry.

[Xero-Limit]

Originally Posted by dstrout

So I have just read this whole thread. Assume my parameters are a stock motor and exhaust, always good 93 oct with occasional tanks of E85 when handy, 6-8 track days a year, and I'm mostly looking for silly-strong roll-ons from 2500 - 4K rpms on a daily basis. I'd also like to hit an honest 300 hp just for the ****-wagging rights of 9 lbs / hp.

Do I understand correctly that my best plan is a 335 with a small-ish pulley, a BOV to limit boost on the high end, and possibly a lowered rev limiter? Or could I do what I'm asking with a 210, given that I'll never build up a motor for this car, so don't need the headroom of the 335.

That's a centrifugal kind of a setup. On this you really don't have to worry about it. A larger pulley takes care of things. You can also just increase the overlap and blow the air out the exhaust valve. Nice thing about dual VVT.

I think folks need to put this in perspective a bit as well. The 335 is about 50% bigger than the 210. Spinning a 210 with a 70mm pulley gets you about 15000 RPM by 6800 RPM. The 335 is spinning about 25% slower (rough math) with the larger pulley. Nothing huge at that drive level, especially on e85. For pump gas I'd definitely do the 85mm pulley on the 335. Those are cheaply available from us or sprintex. You can also cut the rib under the hood and get the 90 or even 100mm pulley from MRT in AU for about 200 bucks shipped to the US. Not a huge deal. Though really at that point I'd say just stick to the 210 and why we didn't bother importing them.

We're going to focus more on the track side in the next few months, and for that we'll go down to the 85mm. Realistically over 250 torque on the track in this platform is a bit much on a road course without a full cage etc...so 300whp is a much better power level and we can hit that no problem with the 85mm. The challenge I expect sooner is the temperature management. Big power means major work there, and with the oil cooler and off the shelf koyorad I hope that'll be enough.

[350matt]

So how much boost pressure does the 335 make on an 85mm and what are the IAT's like post compressor?

[WHITE]

@moto-mike Whats the max lb/min of the 335?

[20firestorm13]

So we just finished pulling off the stock exhaust which became a severe limitation as we were testing both the limits of the kit and the limits of the stock system. I would not recommend this kit without replacing the header back. It is just to much and this may seem like common sense but sometimes it still needs to be said!

Using a
P&L Motosports Header
HKS Front Pipe
Nvidia Over pipe
Perrin 3in Catback

(Yes I was playing mix and match due to part availablity :P )

On the 85mm we managed 280whp / 245 trq on e85. This is on a very unforgiving mustang Dyno also. I am looking locally for a dynojet to get numbers from so I can show both.

Some people have mentioned the throttle body being an issue, but to my knowledge people who are running much higher hp/trq set ups with turbos use the same throttle body. How would that be different for us?

[DIE1000DEATHS]

Originally Posted by 20firestorm13

So we just finished pulling off the stock exhaust which became a severe limitation as we were testing both the limits of the kit and the limits of the stock system. I would not recommend this kit without replacing the header back. It is just to much and this may seem like common sense but sometimes it still needs to be said!

Using a
P&L Motosports Header
HKS Front Pipe
Nvidia Over pipe
Perrin 3in Catback

(Yes I was playing mix and match due to part availablity :P )

On the 85mm we managed 280whp / 245 trq on e85. This is on a very unforgiving mustang Dyno also. I am looking locally for a dynojet to get numbers from so I can show both.

Some people have mentioned the throttle body being an issue, but to my knowledge people who are running much higher hp/trq set ups with turbos use the same throttle body. How would that be different for us?

My thoughts as well on the throttle body. There are plenty of 400+HP turbo cars running the stock TB. They are also using the OEM intake manifold, which I can only hope does not flow as well our 335's runners do.

I have a full exhaust except for the overpipe, but have been eyeballing Nameless' full 3" from header back...

[20firestorm13]

If you go with a 3in over pipe be prepared for rubbing. There is not a lot of space at all under there.

And if you want to do it this year, you may want to order it now.

Originally Posted by DIE1000DEATHS

My thoughts as well on the throttle body. There are plenty of 400+HP turbo cars running the stock TB. They are also using the OEM intake manifold, which I can only hope does not flow as well our 335's runners do.

I have a full exhaust except for the overpipe, but have been eyeballing Nameless' full 3" from header back...

[DIE1000DEATHS]

Originally Posted by 20firestorm13

If you go with a 3in over pipe be prepared for rubbing. There is not a lot of space at all under there.

And if you want to do it this year, you may want to order it now.

Perhaps some STI mounts will be ordered as well...

[bfsnail]

Originally Posted by DIE1000DEATHS

My thoughts as well on the throttle body. There are plenty of 400+HP turbo cars running the stock TB. They are also using the OEM intake manifold, which I can only hope does not flow as well our 335's runners do.

Sucking vs blowing would be my guess. On turbos, the the throttle body is pressurized and all you have to do is open the intake valve for air to flow. The supercharger has to suck the air in, and its much easier to suck fast through a big straw...

[johan]

Originally Posted by bfsnail

Sucking vs blowing would be my guess. On turbos, the the throttle body is pressurized and all you have to do is open the intake valve for air to flow. The supercharger has to suck the air in, and its much easier to suck fast through a big straw...

This is exactly it. Turbo's push through the TB, which is much more efficient than a PD blower which generally pulls through.

[stockysnail]

Originally Posted by Dream20b

Looks like I need a short intake for my 210, for Teh Noizez

The Perrin intake with a metal charge tube instead of the plastic makes it much more noticable. Most of it is from the Perrin intake. I have a few videos of my car on the track in my build thread near the bottom of the first post in the build thread.

[stockysnail]

Originally Posted by moto-mike

That's a centrifugal kind of a setup. On this you really don't have to worry about it. A larger pulley takes care of things. You can also just increase the overlap and blow the air out the exhaust valve. Nice thing about dual VVT.

I think folks need to put this in perspective a bit as well. The 335 is about 50% bigger than the 210. Spinning a 210 with a 70mm pulley gets you about 15000 RPM by 6800 RPM. The 335 is spinning about 25% slower (rough math) with the larger pulley. Nothing huge at that drive level, especially on e85. For pump gas I'd definitely do the 85mm pulley on the 335. Those are cheaply available from us or sprintex. You can also cut the rib under the hood and get the 90 or even 100mm pulley from MRT in AU for about 200 bucks shipped to the US. Not a huge deal. Though really at that point I'd say just stick to the 210 and why we didn't bother importing them.

We're going to focus more on the track side in the next few months, and for that we'll go down to the 85mm. Realistically over 250 torque on the track in this platform is a bit much on a road course without a full cage etc...so 300whp is a much better power level and we can hit that no problem with the 85mm. The challenge I expect sooner is the temperature management. Big power means major work there, and with the oil cooler and off the shelf koyorad I hope that'll be enough.

I'm looking forward to seeing what you guys find out. Once next years tax return happens I'll probably be looking for AP Racing Sprint kit and the flex fuel kit for my 210 Sprintex, then 335 kit after that, or maybe before flex fuel if that turns out to be promising.

[smudge]

Originally Posted by stockysnail

The Perrin intake with a metal charge tube instead of the plastic makes it much more noticable. Most of it is from the Perrin intake. I have a few videos of my car on the track in my build thread near the bottom of the first post in the build thread.

So we all know the OEM airbox is fairly decent in terms of air flow, but I want to change it for something that will make my 335 setup scream even more whilst maintaining a decent rate of air flow obviously

Would Perrin be your recommendation or is there anything else to consider?

[stockysnail]

Originally Posted by smudge

So we all know the OEM airbox is fairly decent in terms of air flow, but I want to change it for something that will make my 335 setup scream even more whilst maintaining a decent rate of air flow obviously

Would Perrin be your recommendation or is there anything else to consider?

The Perrin seems to be the best as far as if a car has an oil cooler, so that's the only one I can really recommend. Moto-east has a nice one but it will draw a little more hot air since the filter is inside the engine bay.