Update After Modifications

[9Thirty]

Okay, after installing headers/exhaust, air intake, inter cooler, new k27/29 turbo, Tial 46mm (1 bar spring), Patrick Motorsports Clutch and LWFW, Leask WUR; keep in mind that this is the first run out of the box, still needs some dialing in; she produced 352 rwhp at 4800 rpm and 436 ft/lbs at 3400rpm. She is a little rich below 3500, at 4000 rpm AFR is 11.44 (ideal) then she starts to lean out to 12.75 AFR at 5000rpm (shut her down after that).

I'll try to post up the dyno sheet later today. I think we need to work on the timing (too much torque?) and add fuel above 4500rpm to keep her under 12 AFR. We also need to dial it down (fuel is at 10 AFR or so) below 3500. I think if we dial it in, we can achieve 375 rwhp/400 ft/lbs. Any thoughts?

Motor is a stock '79 3.3, all new hoses, oil cooler, spark plugs, plug wires, etc, etc.

[9Thirty]

[oilonly]

Any thoughts?

Yes, I like the fact that we can bolt on an extra 60 hp over stock. As far as dialing it in for 25 more others here will have to advise.

[9Thirty]

Originally Posted by oilonly

Yes, I like the fact that we can bolt on an extra 60 hp over stock.

More like 135 hp over stock. These cars had 265 fwhp from the factory, now she is close to making 400 fwhp, 350 rwhp. With a little more tuning, she should make close to 420 fwhp, 150 hp over stock.

[9Thirty]

Dyno

[gsxrken]

I believe Porsche did use RWHP figures, so the USA 265-280HP depending on the year was RWHP.

Forget the numbers (other than AFR)- how does it drive? I'll bet you've transformed the car with all the right mods.

[9Thirty]

Originally Posted by gsxrken

I believe Porsche did use RWHP figures, so the USA 265-280HP depending on the year was RWHP.

Forget the numbers (other than AFR)- how does it drive? I'll bet you've transformed the car with all the right mods.

I haven't had the chance to drive it yet, still doing some slight work to it that prevents me from driving it. I believe you may be mistaken with the horsepower numbers. Porsche used engine dyno results which are a far cry from wheel horsepower. 265 was the engine dyno number (flywheel) for the U.S. 1979 930. The wheel horsepower was probably closer to 240. So we are really waking this motor up from a coma when we give it the ability to breath with free flowing open exhaust and headers, good fuel delivery, and a larger efficient turbo. The clutch, LWFW and WEVO shifter doesn't hurt either.

Interior shot

[Les Paul]

That Fabspeed is some good looking stuff you have there.

[oilonly]

Originally Posted by 9Thirty

More like 135 hp over stock. These cars had 265 fwhp from the factory, now she is close to making 400 fwhp, 350 rwhp. With a little more tuning, she should make close to 420 fwhp, 150 hp over stock.

Got it. Keep thinking to myself that these are near 300 fwhp engines when stock. Nice set up.

[Speedy Squirrel]

Originally Posted by gsxrken

I believe Porsche did use RWHP figures, so the USA 265-280HP depending on the year was RWHP.

Forget the numbers (other than AFR)- how does it drive? I'll bet you've transformed the car with all the right mods.

Porsche has never used rear wheel horsepower for rating engine power output. It is flywheel power and is measured in PS, then converted to HP.

[Miguel Antonett]

Prrrreeeetttycool!

Impressive torque that early... was the dyno properly calibrated?

If so, congrats!

[quattrorunner]

How's it sound?

[9Thirty]

How's it sound?

Sweet!

[9Thirty]

Prrrreeeetttycool!



Impressive torque that early... was the dyno properly calibrated?
Yes.


If so, congrats!

Yes.

[fredmeister]

Originally Posted by 9Thirty

Yes.

Something was bothering me about the dyno graph.

How come the torque and hp curves dont intersect at 5250rpm point?

They should cross at that rpm unless you altered the scales on the graphs somewhere between the two.

Not trying to be a ball buster but this is confusing and just wanted clarification.

Those are impressive numbers for the changes you have listed.

Fred

[9Thirty]

Something was bothering me about the dyno graph.



How come the torque and hp curves dont intersect at 5250rpm point?



They should cross at that rpm unless you altered the scales on the graphs somewhere between the two.



Not trying to be a ball buster but this is confusing and just wanted clarification.



Those are impressive numbers for the changes you have listed.



Fred

Didn't touch the graph as far as I know. I wasn't there, so I'll ask my tuner. Is this an absolute like light speed equations or is there some variation? 4th gear vs 3rd?

[9Thirty]

Funny this one doesn't intersect there.

[TurboKraft]

HP = (Torque x RPM) / 5252
At 5252 the TQ and HP values should be equal.

In the graphs above, it appears the values are the same at 5,250rpm. It looks wonky because the scaling of the left axis and right axis are different.

[9Thirty]

Originally Posted by TurboKraft

HP = (Torque x RPM) / 5252
At 5252 the TQ and HP values should be equal.

In the graphs above, it appears the values are the same at 5,250rpm. It looks wonky because the scaling of the left axis and right axis are different.

You're right, the values on my graph are both at about 350 at 5250. He might of had it in 4th, would that have an effect on the results?

[TurboKraft]

Ideally, a 1:1 drive ratio. For a 930 4-sp, 3rd is closer to 1:1 than 4th is.