Capable of 425 hp?

[dynevahn]

Curious as I just bought a 78 930. Following mods

3.3L TURBO (K27-7006)

-SC CAMS

-7.5:1 COMPRESSION

-VALVES ADJUSTED IN 2005

-BORLA SS HEADERS & EXHAUST

-915SC 5 SPEED TRANNY

-NEW HP CLUTCH
copy and pasted from what he told me. Can these mods make the 930 have 425 hp? Thanks

[david.avery]

My first thought is that if it is, he may be running 1.3 bar of boost or something unsafe.

I'll let others respond, but I think that may be high, (425 at the crank). I had one that was electromotive twin plugged, fuel enrichment, and a monster kokeln intercooler and massive turbo. I think it was hovering around 400 at the crank.

If it is making it, make sure that there is a safety margin with boost, enrichment, and some sort of intercooler?

[Craig 930 RS]

I'd believe 360 at the wheels - maximum.

In fact, I'd almost guarantee it. If he's running more than .9 bar and uses it at the track he's an idi...-foolish.

[TRE Cup]

TOO MUCH BOOST !
or a funny dyno

[RarlyL8]

That setup is similar to my own. If those mods are all that deviates from stock then you're probably not at 425HP, closer to 400HP at the crank, 340ish or so at the wheels. You don't list the boost level. Something over 1.0bar on race gas could get you there (with a big intercooler).

[dynevahn]

andial interooler and 1.0 bar. Im not saying it has that much horsepower but that was what he told me to buy it. Just curious as what I might be. I will have it dynoed on friday. I did get it for 15k though.

[Craig 930 RS]

If it's at a Dynojet 248C, it should go 400 at the wheels.
I'd bail on the 1.0 spring if it ever used at the track -

[beepbeep]

No. It should put around 360-380 at the crank. That's basically stock engine with SC cams and later turbo.

[RarlyL8]

But it also has headers and Andial intercooler with 1.0bar spring and 7.5:1 compression. Souldn't that bump you up near 400HP at the crank?
My engine has a basically stock long block sans SC cams and hits the 400HP mark based on 1/8th mile time slips.

[slow&rusty]

Since when does Borla make headers for the 911 Turbo?

How has he compensated for fuel....dyno and data logging by a wide required before purchasing...or else you are buying a bog can of soup.

Stock IC is useless even at stock boost levels...great garage piece to impress your firends..terrible cooling piece for the car.

The info provided is WAAAAY too vague, I'll pass until I see more and get mucho details.

Yasin

[Craig 930 RS]

Hmm, gotta agree with rusty -

BUT......friends' 1982 930 with K27, 3.3, SC cams and B&B headers does have 360 at the weheels at .8 bar.

Heck, ya bought it - now go and dyno it - !

If not for what appears to be a bent valve, mine would have 410-418 at the wheels, but it is modified a little......

[RarlyL8]

I don't think it's vague at all. Here is the list:

-3.3L Turbo (K27-7006)
-SC Cams
-7.5:1 Compression
-Borla S/S Headers and Exhaust
-Andial Intercooler
-1.0 bar spring

That's all standard issue stuff we've seen a thousand times as the normal recipe for 400HP at the crank. He also said it will be on the dyno this Friday so we should get an answer.

[SCHNELE]

The likeliness of those mods producing 400hp is highly suspect, and if run at unsafe boost levels you would have detonation and very likely a hurt motor. I just got my CIS 1987 turbo with Andial pistons and sleeves, K27/29 hybrid turbo, euro fuel head, garretson intercooler, B&B exhaust and headers, SC 330 cams and my car made 379 at the rear wheels. Oh btw that car will chew up and spit out that 915 trans.

[RarlyL8]

We are talking CRANK HP. 379HP at the rear wheels is 435HP at the crank. Boost is stated above at 1.0 bar. The only difference I see between your motor and the one in question is you have Andial pistons. Unless the compression is different it will not affect HP.

Yes the 915 is in danger, you'll have to take it easy off the line.

[dynevahn]

seriously the tranny isnt good for the 930? I suppose I should start looking for a g50. Thanks for the input guys. I will know for sure friday.

[Bruce M.]

There may be no area involving a 930 more subject to speculation (usually wildly enthusiastic) than its hp and torque numbers. And even without the speculation, factors/manipulations related to dynos--gas, boost, ambient temperature, dyno "calibration", etc.--all make hp numbers a crapshoot. With the right factors dialed in--like freezing ambient temperature, 110 gas, high boost for short bursts--you can get numbers that mean very little to how your car will operate under normal conditions, not to mention the track.

But at least a dyno gives you a chance at something approaching repeatable accuracy for a given car. More than once I've seen reputable shops "estimate" hp numbers prior to a sale that they sheepishly acknowledge were way, way high after a dyno was done.

[Craig 930 RS]

Vahn - let's see this:

*Dynamometer run on a Dynojet 248C. The most repeatable, cheat resistant dyno you can use. (Flame away, I could care less)

*92 pump gas w/a .8 bar spring, OR race gas with that 1.0 bar.....which you'd better use for engine survival on the dyno for repeated runs

If you use a 248C, my FTHOI guess is 360 rwhp.

Each .10 bar is 20hp

[Bruce M.]

I guess 330 at the wheels at 1 bar with race gas at something near 70 degrees ambient on a 248C.

Let us know...

[RarlyL8]

I'm sticking with my first estimate given the info listed below:
400HP at the crank = 340HP at the wheels.

-3.3L Turbo (K27-7006)
-SC Cams
-7.5:1 Compression
-Borla S/S Headers and Exhaust
-Andial Intercooler
-1.0 bar spring

[Craig 930 RS]

Vahn - Take a pic of the chart & post it when you are done