tecart

i never did nitrous but i have a mag from 5 years back with a 944 turbo that used a cheater shot of it for low boost spoolup help, this was a 75 hp shot here is the article for all to see, say thanks if you like it

aka 951

Luke...then why did Porsche use the 26/8 rather than the 27/6 on the turbo S? They certainly had the technology.

Do you have any experience with either turbo?

tecart

damm i must of thrown it out, sorry guys, i cant find it, the car ran the 1st prototype autothority mass air kit, a k27#8 turbo, 75 hp shot of nitrous, 18 inch anterra wheels, 911 side mirrors and door handles, painted a maroon color, chips, and was able to do 175+ mph the article said, i remember Zoner and turbo magazine was the mag. i had, i threw it out last month since that technology is already old news, but it showed the setup and where to put the nos kit in, oh yeah his car had a eprom changer on the dash to switch between 4 different chips too with a key switch, i thought that was cool for 1996...

toddk911

What came first the MAF or the Turbo?

I know some in here are more for MAF and some are for turbo upgrade, assuming you have to pick one or the other??? <img src="confused.gif" border="0">

Konstantin

&lt;Yeah, I think 325rwhp is about the highest I've seen anyone get with an MAF kit.&gt;

well Johns (fast 951) car made 400+ HP with his maf and his Turbo on a 2.5 L engine
I have the dyno sheet.

Konstantin

aka 951

I don't believe the computer even uses the MAF or VAF signal after %60 of 5 volts. It doesn't really matter as far as I know. The full throttle maps are one dimensional. The problem with a MAF is that if you go too big it won't have the low-speed air metering accuracy of the stock VAF. In addition whenever you piggy back the MAF you SCREW the timing and/or fuel maps. Simply put when doing a MAF you need a custom chip - the less adjustments the better.

lou951

Kokeln racing claims over 360 rwhp with their kit which includes a turbo and their intake in addition to other components. This is w/ stock ECU, not stand alone, on a 2.5. The ad appears in the recent Excellence Mag.

SamGrant951

[quote] You'll have a heck of a time tuning in that turbo and the required larger injectors with that Autothority MAF. <hr></blockquote>

True enough, i forgot about the autothority MAF.
A large adjustable maf w/ large garrett could make around 350rwhp, i have seen the dyno sheets on someones car..John Pohl possibly? 344rwhp as i remember (i could be wrong)

lou951

With the Autothority chips, you send them the turbo info and they burn a new set of chips.

Luke

[quote]Originally posted by aka 951:
<strong>
Do you have any experience with either turbo?</strong><hr></blockquote>

Yes, the k26/8 (have driven) and I know of people witha k27/6 (have listened too ) . Go out and pick up Maximum boost man......and settle down

Paul Bloomberg

Hey Brian,
My car will be done next SAT!!! : ) After this weekends PCA club race in SoCal! As far as the what kind of turbo?? Just like anything else, h ow much do you want to spend. Also everybody seems to be thinking that more HP/TQ = more lag. NOT!!
I have had the various KKK turbos on my car and the K27#8 gained 20RWHP over the "quick spool". The next time I race someone from 3000RPM then stop at 4000RPM. I will probably wish I had the #6/DR. ENDUSER

fast951

How about 409rwhp/424rwft-lb out of a 2.5L 951, Custom Turbo, custom MAF & chips, larger injectors, 100 octane gas?
Full boost (22psi) at 3800-3900RPM?

Paul Bloomberg

fast951,
Who built yours? What kind of turbo? I know that there are a more than a few 400RWHP 2.5's running around but they are making that HP/TQ @ 25psi. From what I understand getting the A/F right with dyno tuning and the CUSTOM? turbo is the key. BTW, that is with a MAF and chips and lots a $$$$$'s. For track use I was told to go with Carillo(SP?)rods. But since I don't have the ***** or the SKILL to drive one of these monsters at it's limits I stayed with the stock rods for the street. I'll stick with my 944 spec racer at the track. PAUL

fast951

Paul,

I personally retuned the MAF chips, and after years of experiments I found a turbo that works great. Both units can be had for $2500.. I have over 60 track hours and some 80 or so dyno pulls on my engine. I have the stock 1989 Turbo rods, actually the whole bottom end is stock.
The boost I'm running is 22psi, but I use 100 octane gas and I have larger injectors.

I did setup few guys with my turbo and adjustable MAF, and they love it.

John

IanM

Still looking for suggestions? I have pretty much exactly what "beab951" described - T04e, I think 56 trim (it's a Huntley "Stg 2", non-ball bearing), MAF (HR Stg 3, with modified piping to position sensor right next to air filter), Bosch 52# injectors, Autothority Stg 2.7 chips (actually designed for the stock TurboS K26/8, but work fine as I control fuel with a piggyback system) afpr, deltagate, manual boost controller, widefire head gasket, custom i/c pipes, upgraded bov, ARC2 (Rev.2) fuel controller, testpipe, plus other minor things I probably forgot.

My car has made 305rwhp at 14psi of boost, 325rwhp at 18psi, I'm sure it'd pull 340rwhp+ without too much trouble at 21psi+. I got my a/f dialled in PERFECTLY by using a stand-alone Motec wideband O2 sensor on the street and then a different wideband on the dyno. I had to turn the afpr down to 36psi to maintain proper a/f ratios at idle and low boost, but using the 52's and tweeking the ARC2 allowed me to maintain a perfect 12.5:1 a/f ratio at high boost and high rpm.

I'm very happy with my setup. The car is as fast I need it to be, and still (so far) reliable. I think 400 crankshaft horsepower is a nice number for a 951, and I'd recommend a similar setup for any 2.5L turbo.