Other PD superchargers

[Cards2323]

Originally Posted by sw20kosh

Don't get sprintex. That blower and intercooler are too small.

I'm not looking for huge numbers, I would be perfectly happy with 250whp amd the early tq it produces. I really dont plan on doing many bolt ons either so I dont see the need to go with say a rotex kit...

[sw20kosh]

Originally Posted by Cards2323

I'm not looking for huge numbers, I would be perfectly happy with 250whp amd the early tq it produces. I really dont plan on doing many bolt ons either so I dont see the need to go with say a rotex kit...

Even still, I would not get the sprintex.

[blown]

Originally Posted by sw20kosh

Don't get sprintex. That blower and intercooler are too small.

please elaborate on the intercooler comment.

[weederr33]

Go big and get the most overpriced SC on the market!

[FirestormFRS]

The Sprintex is actually just about right for a stock internal FA20. Bigger isn't always better.

[Sellout]

Originally Posted by FirestormFRS

The Sprintex is actually just about right for a stock internal FA20. Bigger isn't always better.

Just about right for an absolute max of 300ish whp on E85 or 300ish crank hp on gasoline, imo. If you want much (any?) more you need a larger unit. And a larger intercooler.

[tahdizzle]

Just gives me more time to stack paper

[Xero-Limit]

Originally Posted by Sellout

Just about right for an absolute max of 300ish whp on E85 or 300ish crank hp on gasoline, imo. If you want much (any?) more you need a larger unit. And a larger intercooler.

300 whp when dealing with PD/Twin Screw blowers is nothing to sneeze at. It feels like more than that up until 6500 RPM where the peakier systems show better numbers. But to have the torque down low is awesome for a street setup.

I keep seeing the intercooler being questioned in regards to size...it isn't undersized. It is small, yes--compared to a bar/plate and tube/fin setup. But it is a laminova core that uses a much, much higher density of fins. This allows the compact fitment and yet support 400ish HP.

There is a distinct advantage to having a smaller package here. The throttled volume is much lower. The cosworth setup will no doubt make great power, but the volume that the intercoolers take up appears to be very significant. The more volume, the slower the throttle response. I can't say whether it is something that you will definitely feel on this car as I haven't driven it, but there's definitely advantages to the smaller core. A larger heat exchanger in the front or a higher volume pump may help make the most of the smaller core.

[Sellout]

Originally Posted by moto-mike

300 whp when dealing with PD/Twin Screw blowers is nothing to sneeze at. It feels like more than that up until 6500 RPM where the peakier systems show better numbers. But to have the torque down low is awesome for a street setup.

Oh I agree with that. I have been in one of the local cars that makes 300ish whp on e85. It's quick enough to be fun for sure, and could be trouble for someone who can't handle it. I see it as the way the car should have been from the factory and anything less is just not enough.

I keep seeing the intercooler being questioned in regards to size...it isn't undersized. It is small, yes--compared to a bar/plate and tube/fin setup. But it is a laminova core that uses a much, much higher density of fins. This allows the compact fitment and yet support 400ish HP.

I think that traces back to some comments by one of the tuners about how difficult it is to counter knock with the sprintex kit compared to the centrifugals. Could be that they were really up against the same combustion chamber pressures with both kits and trying to make up a difference in power but the real difference was the extra juice that it takes to turn the twin screw. I'll admit that I've just been keeping with the rest of the herd on that line of thought about the intercooler, we could all be way off base.

There is a distinct advantage to having a smaller package here. The throttled volume is much lower. The cosworth setup will no doubt make great power, but the volume that the intercoolers take up appears to be very significant. The more volume, the slower the throttle response. I can't say whether it is something that you will definitely feel on this car as I haven't driven it, but there's definitely advantages to the smaller core. A larger heat exchanger in the front or a higher volume pump may help make the most of the smaller core.

I tend to look at the discussion about throttle response as it relates to extra space IN THE PLENUM as snake oil. Especially when we're talking about an intake manifold we haven't measured. We can't know that there's even an issue to discuss on that front yet.

[350matt]

The main issue of the Sprintex IC is that the IAT's post cooler are up in the 60°C mark which is really hot - the Cosworth setup has published IAT's of less than 1/2 that...

[blown]

http://www.ft86club.com/forums/showt...t=48698&page=2

[Xero-Limit]

Originally Posted by 350matt

The main issue of the Sprintex IC is that the IAT's post cooler are up in the 60°C mark which is really hot - the Cosworth setup has published IAT's of less than 1/2 that...

I think that datalog (as @blown shows above in reference to kodename's log) starts with temps in the 30 range. So 30c increase is not irrelevant, but for a water to air heat exchanger and many subsequent pulls in a row, it is typical and well within the acceptable range. An air to air intercooler will be better, but you just can't do that with a PD or twin screw setup and keep packaging simple.

And not sure what cosworth published, but you need to look at the delta and not the actual temp. If they managed to keep only a 15C increase with repeated pulls (half of kodename's log) then that I would be quite impressed.

[350matt]

this is what Cosworth published

[Xero-Limit]

Originally Posted by 350matt

this is what Cosworth published

I don't think you can compare an in house test without the measurement methods outlined, to a real life test with multiple back to back runs. This one shows about a 10c increase in temp, but we don't know the boost, road vs dyno with massive fans, or a quick 1st gear pull on a cold motor vs a 4th gear pull.