Anyone hotrod their 2.5?

[marvin2006]

Has anyone hopped up their 2.5 yet?

I was wondering about chipping etc..?

Thank you for your thoughts and ideas...

Matt

[wawalker]

Originally Posted by marvin2006

Has anyone hopped up their 2.5 yet?

I was wondering about chipping etc..?

Thank you for your thoughts and ideas...

Matt

There doesn't seem to be much interest among NB pilots w/ the 2.5, but there is a lot out there. Chips, intakes, exhausts, turbo kits, etc. I would suggest pretending to be a new Rabbit 2.5 owner and go check out info over at vwvortex.com in their forums. Eurotuner magazine had an article in the spring sometime with all kinds of 2.5 tuning products--try to get that back issue.

[digifant_gli]

I chipped my Mom's New Beetle Convertible (at her insistance) (it's true...she didn't think that the Convertible was as quick as it could be, so we chipped it) and the difference was impressive. More torque, and a lot more power....the fuel economy was improved as well.

I have looked into the changes that were made on the Golf and Jetta to increase power from 150 to 170. One thing that we all must remember is that VW underrated the power output of these engines on purpose - out of the box, the 2.5 in the Beetle is making about 160 horsepower.

[JuggBug]

Originally Posted by wawalker

There doesn't seem to be much interest among NB pilots w/ the 2.5, but there is a lot out there. Chips, intakes, exhausts, turbo kits, etc. I would suggest pretending to be a new Rabbit 2.5 owner and go check out info over at vwvortex.com in their forums. Eurotuner magazine had an article in the spring sometime with all kinds of 2.5 tuning products--try to get that back issue.

Bite your tongue!!!!!!!!!

JB's been hooked up with exhaust and a chip. He rules.

[wawalker]

Originally Posted by JuggBug

Bite your tongue!!!!!!!!!

Ouch! That hurt.

JB's been hooked up with exhaust and a chip. He rules.

Well, duh. But you have to admit--when it comes to improving performance the 2.5 gets the least amount of talk on these forums.

[InjunDon]

Problem with the beetle 2.5 is that it has Power steering and those of us with automatics are the only people with D,S,and tiptronic so chipping it does make the transmission do funny things.

Also Before chipping my 07 she made 121Whp and 148ft.lbs of torque, about 10HP less than an auto rabbit (150hp rabbit. After chipping and intake she made 138Whp and 161 ft.lbs of torque BUT..using sport mode now does all kinds of crazy shenanigans shifting at odd times for no reason..etc. But D is alot more responsive than it used to be, but not the same as S used to be.... This happened with both Neuspeed, and unitronics chips.

[wawalker]

Originally Posted by InjunDon

Problem with the beetle 2.5 is that it has Power steering...

Every NB sold in the states has power steering. Perhaps the ones with the really small 4 cyl. sold in Europe don't? I dunno, but all the 2.0L, 1.8Ts, TDIs and 2.5L sold here have had power steering.

BTW: Not surprised you had problems with Nospeed and Faultytronics.

[bugsy98nb]

Originally Posted by wawalker

Every NB sold in the states has power steering. Perhaps the ones with the really small 4 cyl. sold in Europe don't? I dunno, but all the 2.0L, 1.8Ts, TDIs and 2.5L sold here have had power steering.

BTW: Not surprised you had problems with Nospeed and Faultytronics.

its Pretendoshift

[wawalker]

Originally Posted by bugsy98nb

its Pretendoshift

now that is a sloppy problem, isn't it?

[bugsy98nb]

Originally Posted by wawalker

now that is a sloppy problem, isn't it?

Nah
Nice and Smooth

[OMiG0SH iTZ MATT]

What exactly is chipping a car?

[boogety boogety]

Modern cars have engine parameters controlled by a computer, which operates from a preprogrammed "chip." This chip tell the engine when to shift the transmission, the top rev range before fuel cutoff, how to set the gas-to-air ratio for maximum mileage instead of horsepower, etc. etc. An aftermarket "chip" will have been programmed by someone who knows your car's engine and limitations to change those paramters to go more towards performance than mileage: higher rev limit, earlier downshifting, more fuel delivery, increased horsepower, whatever. Changing chips is a cheap and effective performance mod for most drivers. In conjunction with better exhaust and suspension upgrades, chipping can transform a car from a lowly commuter to a 'bahn burner.

Why doesn't everyone chip their engine? Most chips will void your manufacturer's warranty unless installed by the dealer, and very few dealers are savvy or performance-oriented enough to promote even in-house chipping. And they're expensive, relatively speaking: Several hundred for some of them. Still cheaper than most any other performance enhancer, but still, it does keep some drivers away from chips.

[DZLBUG]

Originally Posted by UnBeetable69

i cant find that many performance parts. Ive got a new muffler and a K&N drop in filter

which does zero for performance...

[UnBeetable69]

a

[noR]

I think he was just doggin' your mods. Surely didn't actually have anything constructive to add.

[DZLBUG]

Here's something constructive:

Exhaust mods on a stock car do nothing for performance. Sure it might sound good...and that is fine. Just don't fool yourself into thinking that it adds power.

K&N filters are another story. Anything VW produced post 1998 used a "Hot-Film" Mass Air Flow sensor (HFMA). These are the types that eat themselves alive when contaminated by ultra fine dust (greater than 20 microns) or oil.

What gets through a K&N filter, oil and dirt:








The surface builds a static charge which will attract fine dust particles, also oil will adhere and coat the surface causing it to overheat since the oil cannot provide sufficient cooling of the "Hot Film" region in the middle of the sensor plate.

Pilot's can appreciate this more than most, the leading edge of the HFMA sensor is much like a wing, fine dust will adhere and cause the airflow to become disturbed causing eratic sensing of the air passing thru the MAF. Often air flow is read to be lower than actual leading to a gradual decline in power output due to the influence of the MAF on the ECU mapping. Eventually the owner realizes he has lost 30hp and then after a failed attempt to clean the now damaged MAF sensor ends up having to replace it with a new one.

Another cause is opening and closing of the air filter box to "Look" at the filter. Once a filter is installed NEVER! open the airbox! The foam rubber once compressed and heated by the engine compartment OR left compressed for a period of time causes the seal to "Lose it's elastic memory". this will prevent the seal from sealing against the varying contours of the airbox contact points. Often when the box is opened for a seal replacement you find "Tracking" marks across the seal lip as well as fine dust adhering to the upper "Clean" portion of the box which appears to be white when illuminated by a light. These marks appear to be vein like and follow random orientations but are the result of the static charge that forms on the plastic housing which attracts and holds the dust in place.

I find the entire K&N merit argument laughable. The claims of miniscule gains in horsepower due to reduced air restriction are a joke given the fact that in a gasoline fueled engine there is a constant internal parasitic draw of engine power due to pumping losses resulting from the engines throttled air induction required in order to maintain a narrow band of ideal air fuel ratio for combustion. The only time this is not an issue is at wide open throttle. What percentage of the average persons driving is done at wide open throttle?

Bottom line, the OEM filter is an ultra low resistance element that hardly impedes the flow of air.

Anybody that claims a filter on a VW results in power gains is FOS!

K&N Lie Detector, back to back dyno results on a TDI:

[DZLBUG]

Originally Posted by UnBeetable69

show me some parts for the 2.5L then

Get the ECU chipped.

[noR]

Good stuff. Thanks DZLBUG.

I haven't heard too much from the modifications on a 2.5L but I remember them having lots of 'tuneable' options back before it was released. Hmm.

[thorgipsy]

I was just looking into mods for my 2.5L and jumped on the APR website.
They have an ECU Upgrade for the Beetle.
I have added this to my definite future upgrades list.
goapr.com ecu upgrade mkv 25l