HP, how much can a LIL 2.5L take? How do they Blow?

[Topless]

PK,
Richard brought his 914 to the PCA breakfast today for show and tell. Air cooled 3.1L 6cyl, turbo with intercooler, 500rwhp, 1600 lbs soaking wet. Whew! That thing will easily outrun a Viper in a straight line and corner like a Cup Car.

[pk2]

Originally Posted by Topless

PK,
Richard brought his 914 to the PCA breakfast today for show and tell. Air cooled 3.1L 6cyl, turbo with intercooler, 500rwhp, 1600 lbs soaking wet. Whew! That thing will easily outrun a Viper in a straight line and corner like a Cup Car.

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Holy sh__.

Is that the one on his web site? My First Porsche (or v-dub)was a 914. Always pined for a 914-6, though 500whp never crossed my mind (is it air-cooled?).

I knew a guy in school who had one with a V8. He’d actually pop spot welds allover the place (torque). After a night of horsing around, he’d come home with the whole car creaking like and old wooden floor.

To your point though, why is it such a challenge to milk meaningful HP out of these Boxsters. I guess though Richard undoubtedly started with all the best from the ground up, while we’re just strapping stuff on the outside.

I talked to him (Richard) briefly the other day, nice guy, to nice to pester with all my questions. If I catch him at one of the PCA events I will though.

Regards, PK

[pk2]

EGT sensors in and working. Whoopee. Been real busy, small hurdle. Put 2 in, one for each bank. Turns out they fit neatly right behind cylinders 1 & 4 (and after all the other pipes have dumped in of course). Convenient because, in at least supercharged applications, # 1 cylinder gets the hottest.

It works fine with gauge I got with it but I got an EGT sensor amplifier that puts out a standard 0-5v signal that can be plugged into any box with data /reading/logging (a standard type “K” EGT sensor puts out mere millivolts). Contemplated remapping signal and outputting the signal to drive my still congealing WI (H2O/meth) setup.

It seems Ideal, more heat, more WI. But the signal seems a little sluggish registering (on the gauge anyway). Wideband O2’s also all put together, have yet to install it because I’m not clear on how to feed it back into the ECU to emulate the narrow band it replaces.

Also picked a far more versatile AIC which realistically will map & run my WI in addition #7 injector & timing. It’s a complete blank slate though, trying to figure out some pretty arcane setup values.

Anyway, wire O2 wideband in, program AIC and make it go with existing setup and WI…then in goes smaller pulley on SC & retune. Probably need a larger 7th injector but this things weird, somehow it’s modded with thread at both ends.
Regards,

PK

[Gary in BR]

PK,

You mention wire the wideband in your last post.

Does the Boxster come with a wideband or narrow band O2??

[pk2]

Originally Posted by Gary in BR

PK,

You mention wire the wideband in your last post.

Does the Boxster come with a wideband or narrow band O2??

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Hey Gary,

O2 sensor; If it does, It’s not one I could use (I really don’t think it is). Stock is 4 wires +,-, signal & grnd. The widebands I know about are 5 or 6 leads.

The Bosch LSU type my controller/ gauge requires has 5 leads to a plug, the controller has 6 ( one terminates at the plug into an internal resistor or somthing). They can be pricey but, not bad at Amazon for $65.

The difference (If you don’t know) is a stock narrow band basically trips at some “above or below” voltage point. Wideband doesn’t trip, It just translates 0-5v into 0 to 20 (or something) AFR units.

My controller remaps and outputs a narrowband signal to emulate original feedback, just like the original narrow band, to feed into the ECU. Saves welding a separate bung.

Hope that word missive helps.

Regards, PK