3.2turbo Conversion - Dyno result...

[Bruce M.]

Merv--


Congrats! Always nice to hear about a successful hop-up, especially a unique one.

As to getting "used" to it, I think I know what you mean. My car's acceleration doesn't *surprise* me like it used to. But it still scares the ***** out of me! Of course, I'm one of those poor souls who used a 3.3 motor as a base .

As to rear wheel horsepower and the conversion, I've done the job empirically on my particular set-up. Motorsport Design crank dyno'd my engine, put the engine in the car, then chassis dyno'd it. Same ambient temp, same gas, same boost. My drivetrain loss was just a shade below 14% at peak horsepower, and the curves below that looked very similar.

So, at 634 hp at the crank at 1 bar, I figure I'm damm close to 545 hp to the wheels. Subtract a bit off of that because I'm usually running pump gas on the street (and I NEVER dyno an engine, in OR out of a car, on pump gas), and I figure 500 is a safe bet.

And that will shred some rubber...as well as keep the driver interested indefinitely, I presume.

So, Merv...what's next for you besides an intercooler?

[WydRyd]

LOL @ widebody911 & pbs911

Joeakso, my Carrera is the turbo optioned/look Carrera with all the 930 goodies (body, brakes & suspension (now KONI's)). It was a good base to do such a conversion on. I'm in Melbourne FYI...

930fan, thanks for the input. When I first set out on this project, my aim was to obtain between 350-400HP and I feel I have achieved my goal. When my mechanic asked me what I thought I should be getting, I immediately said 'bout 350-360". That's what my expectations were, so I am still over the moon with the end result.

G'Day Bruce. Your car must be a scarey fast ride I know you've used your 3.3 as a base, however, what mods have you done to it again? Opened up ports? Carrera intake? Motec? EVO GT2 CAMs? I'd love to hear specifics on the engine mods. 545hp is awesome! I already have an intercooler! My problem was I was getting no airflow over the intercooler and my intake temps was WAY too high (33-35degC). I typically see between 20-25degC under load on the road. That's a 10deg reduction in intake temps, so that has to count for a slight loss of HP on the dyno.

On the dyno, the Intercooler was basically a brick of aluminium with air passing through it. No cooling medium

Thinking of it now, the A/F ratio at high RPM would have been affected by the higher intake temps, so in a real world situation, the added cooling would have corrected the 12:1 A/F at the upper engine loads down to 11-11.5:1.

My next 'short-term' plan is to upgrade my ignition system and in the long-term 'migrate' to a Protomotive Stage 3 system, which is 545HP

[dickster]

WydRyd

congrats on an inspiring project.

i keep reading good stuff about promo. as well, so they must be doin something right.

the only things that concern me (apart from cost!) are my carrera brakes, and that 915. can the box handle loads more power (i know WydRyd has the g50)??

how much can the 915 safely handle??

i couldn't imagine shifting quick enough with mine to get 0 - 100 in 4.2 secs!!

i may have to make a trip to the usa soem time and smuggle the "kit" back to the uk.

[Glasgow 911SC]

i couldn't imagine shifting quick enough with mine to get 0 - 100 in 4.2 secs!!

Its only funny 'cause it's true!

[juan ruiz]

Well, Well, Well, So I go away come back and BOOM!400HP!!
Very nice Merv,any idea of the cost in USD ? Just out of curiosity

[WydRyd]

Thanks Juan. I'd say approx $7-8k USD in total (or $14-16k AUD).

For me it was worth it because you can't get turbo cabrios down here