RolexNJ

I actually have this issue Todd, this was one of the many that I bought and started building a library on 944Ts. It was a great article too. Happy New Years pal...

Tom M'Guinn

I remember reading that issue like it was yesterday. It caused me to sell my rx7tt and rejoin the P-car family. I bought the rx7 for the turbos, to replace a 3.2 911, but all the rx7's were just starting to blow up then, and the 951 seemed to have lots of potential.

rocket951

I have this issue as well, it was the first Excellence that I ever bought. The article we are referring to was extremely inspiring and I must have read and re-read that article 100 times. Graham's car could have benefitted from some of our newer technology but it was the first modified 951 I had heard of and made me think of the possibilities.

Laust Pedersen

The debate on how much HP can be extracted from fuel injectors (and/or fuel pump) with a given flow comes up often, so here is another angle to look at it, namely from an energy efficiency standpoint rather than bsfc, which is close to the same thing, but with different units.

Doing a search, the energy released from burning gasoline is 46.9 MJ/kg. Converting that to the units we typically use gives 7.92 HP-hr/lb of gasoline, which is the same as HP/(lb/hr).

If the internal combustion spark ignition (ICSI) engine is 100% energy efficient , 37 lb/hr injectors can generate 293 HP/cyl or 1173 HP for the engine. That would certainly be nice, however the ICSI engine is quite wasteful (especially at WOT) and 25% energy efficiency is very typical, so this means that 300 HP is where the OEM injectors can be expected to run out of “juice”.

If we really want to question all the details, then HP measurements (dyno charts) should certainly not be left out. Alternatively if you get a WOT energy efficiency of 30% or above, maybe it is time to take out a few patents and start talking to the big auto manufacturers.

Laust

mtnman82

I don't know how you guys can concentrate after rocket makes a post (drooooooooooollll!!!!). Who is that most beautiful woman in your avatar, rocket???

Guns951

We sir, have our brains in our right foot not in our little heads

but an exceptionally large rack will detour eventually after the engine/dyno talk has calmed

Porschefile

Thank you Laust! There, you guys heard it from a more senior member of the 944 community, which should be a bit more credible then my comments apparently are. Hopefully that should end the debate.

RolexNJ

Yes, so lets talk more about that article than your philisophy on turbo sizing, which is what Todd asked about.

Guns951

Yeah...this thread is worthless without pics!

RolexNJ

Dude, did you even read the article? It was very informative, but the pics weren't spectacular at all. Nice car though.

Guns951

I don't have access to a library of Excellence like some here - I just want to see what's causing so much debate.

RolexNJ

For back when it came out, it was very cutting edge. As far as I can recall, Excellence (I could be wrong too for it was back in 1998) really covered and discussed a modded 944T, something that really didnt do before. It was a 2.8L, done by Powerhaus too, before Joe's car was done too. I will try and scan it and send you a copy soon.

Porschefile

Ha, very funny. I didn't mention a single thing about "that" subject, for once.

RolexNJ

You mean for once you're not going to talk about turbos? Wow!

SoloRacer

Is this the car? I know it was in Excellence and it was recently sold on E-Bay (that is where I got the pictures).