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Turbochargers & Superchargers: Theory and Application

113 messages,  Last post on Jul 29, 2008 at 7:31 PM

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What is this discussion about? Performance Mods

Messages Page 8 of 12

#64 of 113 Loud doesn't mean fast.. by driftracer

Apr 22, 2005 (1:59 pm)

been trying to push that point for years, especially to some of the yayhoos back home.
 
I'm seriously looking at a twincharger system for my Ion Redline - a turbo, mounted just like a turbo would normally be, rams air into the intake, then it gets compressed again by the Eaton blower. They company I saw (can't recall the name) runs a piggyback ECU setup and elminates the boost control module on the supercharger. Two blowoff valves are used.
 
I just saw this setup on a Mini Cooper S, and although dyno results weren't shown, the article writer freaked out pretty seriously over the incredible power.
 
Mark from Psi-fi (turbo tuner folks from New Jersey) says:
 
"The benefits are surely worth the cost. On our Mini twincharger kit we have bumped power on pump gas up 120+whp. The power increase can go much higher as we still have another 100whp left in the turbo if we crank the boost up. Performance wise the twincharger kit puts the Cooper S into another league entirely dropping 1/4 mile Ets about 1.5-2 second and bringing trap speeds up from low 90's to 105+ on pump gas and street tires.
 
The Redline and Cobalt SS have a very efficient Laminova air to water intercooler, these intercoolers have been tested to about 86% efficiency. GM did the intercooling system right on these cars with a very large front mount heat exchanger as well. This type of intercooler can deal with the thermal load increases from increased boost as well as twincharging. We are currently developing parts(pulleys, Engine management, driveline products etc. as well as the aforementioned twincharger kit) for this platform. The beauty of twincharging over nitrous is the power is there all of the time and if tuned correctly the car runs around town feeling like stock till you hit the loud pedal then its all business!"

#65 of 113 Chrysler Pacifica by bigdaddy1

Apr 30, 2005 (12:57 pm)

We love our '05 Pac. It fills all our needs, except one! The 3.5 L. , 250 hp 6 just doesn't move this heavyweight the way we need. We have been considering a Paxton s.c. Is anyone familiar with this application? We have seen estimates of $5,000. completely installed. Is this reasonable? Is there a less expensive way to go? Will Chrysler offer any option in the future? Comments are welcome. Thanks.

#66 of 113 Re: Chrysler Pacifica [bigdaddy1] by Mr_Shiftright HOST

Apr 30, 2005 (3:24 pm)

Replying to: bigdaddy1 (Apr 30, 2005 12:57 pm)
That's quite reasonable for a quality job. I only hope it is well-engineered, warrantied, etc. Of course, you will void your warranty I assume or at least that part of it connected to the engine.
 
Don't they make a turbo version of the Pacifica? Maybe you should consider just taking a hit on trade-in and getting that model instead, already done for you from the factory.

#67 of 113 pacifica by bigdaddy1

May 01, 2005 (4:09 pm)

No, there isn't any turbo option avail. The 250 h.p. is the large version! I believe the base model is 205 or 210. We love the vehicle, it's just the lack of "ooomph" is starting to bother me. Any other thoughts are appreciated.

#68 of 113 Re: pacifica [bigdaddy1] by Mr_Shiftright HOST

May 01, 2005 (7:28 pm)

Replying to: bigdaddy1 (May 01, 2005 4:09 pm)
Well if you lose your warranty (and I think you will) and if you can't test-drive a similar car with this kit already on it, I don't think I'd do it.
 
I wonder why 250HP isn't enough? Seems like it should move right along. I wonder if it's running right? You should be around 0-60 in 9 seconds, similar to a Passat or a Volvo XC90.
 
It's the weight that's killing your performance. The Pacifica is kind of a porker. If you're thinking a SC will cut your times dramatically, I really don't think it will. It'll be a lot better, but the SC might give you 75HP or so, maybe a little more. It's not going to make your nose bleed or anything.
 
Also I'm wondering how much boost they are going to run in this kit. You have 10:1 compression in that engine--you may be burning very high octane fuel with a SC.

#69 of 113 pacifica by bigdaddy1

May 03, 2005 (8:23 am)

One fella that did the installation is saying 350 h.p. with 6 lb. boost. I believe he runs higher octane fuel. The warranty question always comes up and I 'm not sure of the real answer. Also, some claim the s.c. while driven sensibly won't damage this engine. I was by the dealer this a.m. and was surprised to see how the prices have dropped on some of these vehicles since their introduction. The pac, 300c and crossover all look a lot less $ than last fall. Thanks for the help. I will continue to investigate.

#70 of 113 Re: pacifica [bigdaddy1] by Mr_Shiftright HOST

May 03, 2005 (8:57 am)

Replying to: bigdaddy1 (May 03, 2005 8:23 am)
Yeah, I don't the SC would damage the engine, especially if it's new. But SC or TC will seek out any ailments in head gaskets or valve seating and amplify them. One must never install an SC or TC on an engine that doesn't show outstanding and even compression ratios.
 
However, I'm almost certain DC would revoke your warranty on the engine, should you make a claim, and I think they'd win any dispute, too. I'd imagine the rest of the car would retain the warranty. In any case DC would have to show that the SC damaged whatever part of the car you are claiming warranty service on. So, they could make a good case for engine damage but not for brakes----now for transmission, with an extra 100HP running through it---well---they might win that dispute, too.
 
100 HP is plausible though I bet the dyno wont' show that. Usually a good SC setup at 6 psi can give 30-40 boost in HP, so he claims are not outrageous. I'd like to see the dyno slips though.

#71 of 113 supercharged 469-horsepower V8 wagon by steve_ HOST

May 06, 2005 (5:03 pm)

Apologies if you saw this link elsewhere on Speed Shop today:
 
steve_, "Awesome Cars -- Let's see 'em!" #11, 6 May 2005 8:02 pm
 
Steve, Host

#72 of 113 correction by Mr_Shiftright HOST

May 07, 2005 (11:04 am)

My post #70 should have read "30-40 PERCENT boost in HP"

#73 of 113 SC by realty_pro

May 09, 2005 (12:08 pm)

There is nothing sweet er than a blown engine. I had a 5.0, 5 speed mustang with an 8LB Paxton Kit. In addition, 3.55 gears, 65 mm throttle body, 1 5/8 shorty headers, 2.5 mandrel bent exhaust pipes, high flow cats and Flowmaster 2 chamber mufflers. The car would smoke through 2nd gear and pull all the way through 4th gear. I don't know how much power the SC added, but it felt like I increased the displacement by 100 cubic inches. It reminded me of the power band on a motorcycle.

Messages Page 8 of 12

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