Lenz System for 328

2949 Views 6 Replies 0 Participants Last post by David Feinberg, Mar 19, 2004

Discussion Starter · Mar 17, 2004

Anyone familiar with the Lenz

Anyone familiar with the Lenz system for a 3X8 series cars? Supposedly good for 30 HP?

Opinions?

Thanks,

Mark

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Discussion Starter · #2 · Mar 17, 2004

The first link it to there Fer

The first link it to there Ferrari applications, the second is the details of the 328 specific application. I noted they claim a final 280 to 300 hp, which is an increase of 10 to 30hp over the stock Euro 328. No prices are quoted, but it looks VERY expensive. New headers, muffler with integral cats, computer, dual 02 sensors, etc...10 day install time? Or is that 10 day delivery time?

http://www.lenzmotorentechnikusa.com/LenzPowerKatFerrari.htm

http://www.lenzmotorentechnikusa.com/pdfs/PowerKatFerrari328.PDF

Someone should ask them, but I am betting this is $8k to $10k installed. Seems cheaper to sell the 328 and buy a 348, which would have 300 to 312 hp. As has been shown before, more hp on a Ferrari never comes cheap.

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Discussion Starter · #3 · Mar 18, 2004

I received an innstallation do

I received an innstallation document for this system. Does Not look difficult to install. Add a few sensors, exhaust and new "box" and your are in. Pricing is $4995 for the kit (without metal cats) and $6500 installed. Lots of money for max 30 HP. I am not sure where the 10 day installation is.....

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Discussion Starter · #4 · Mar 18, 2004

While I may be wrong on this,

While I may be wrong on this, I'm not sure what magic this unit is performing. The K-jet can deliver enough gas, it's the flow restriction that chokes the hp. Perhaps it may add more ignition advance.
When I lived in Germany, the Lenz Katronic K-jetronic injection mods were initially aimed at and advertised for tightening EU emissions regulations, as many of the older cars stood to be taken off the road. In Germany, the whole thing included dual new technology cats as well.
While I do think it will make the K-jet more efficient and responsive, I can't see it adding a whopping load of hp keeping the Kjet flow restrictions - at least not more than a good ignition upgrade would do (The Lenz uses a common ECU for both)

I may be wrong, though - so am ready to learn.

best
rt

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Discussion Starter · #5 · Mar 18, 2004

It's been a lonnngggg time

It's been a lonnngggg time since I looked at what Lentz offers...but if memory serves me I agree with Russ that I just couldn't see any real advantages to their system worth the expense.

Without increasing Air FLOW on the Intake side of a CIS system one is still handcuffed.

Regards, JRV

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Discussion Starter · #6 · Mar 19, 2004

Just to complete the discussio

Just to complete the discussion, Lenz adds the frequency valve controller (not originally on Euro cars, but std. on US) to the Euro system - so the actual injection is simply adding a lambda and air temp control to their ECU.
I also would bet their HP #s, suspect to me, are also in DIN without air cleaner.
I've seen dyno runs with the American K-jet, and the stock Bosch system delivers 14.5 to 1 A/F throughout the whole band at wide open throttle. You are not going to improve on fuel delivery much to the air that is getting through the system. I've seen other richer curves only add maybe 4 - 6 hpThe ignition might up the advance a little, but not 30 hp worth. The qv engine is already at 32.5 degrees at wide open throttle, and that is about the same as the Euro version. While the 2v uses a lot more advance (36 degrees at WOT), the 4v does not really need it I'm told by Tate Casey of Carobu Engineering (who has done a lot of mods in his day).

best
rt

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Discussion Starter · #7 · Mar 19, 2004

So...
With the addition of an

So...
With the addition of an air temp sender, frequency valve and faster response rate, what do you gain from an engineering point of view?

Better mixture control over the effective RPM range...But, plain jane CIS does a pretty impressive job doing that, once the engine is up to temp.

We're still air flow restricted...and we can't alter the duration or timing of the injector pulse.

I'm with you, Russ. A few HP max...

Anyone interested in my "new" engine rebuild in a can oil additive?

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