rage2

[quote]Originally posted by Silverbullet951:
<strong>Wow, so it's fairly easy to hit 350 RWHP on these cars. I think With the map kit by Guru and a new turbo from SFR, new injsectors, that would be good enough for 350 RWHP. What Hp number will you need a stronger clutch?</strong><hr></blockquote>

320rwhp and powershifts will kill the cup clutch using the stock pressure plate. At around 400rwhp, the stock setup will slip and destroy the clutch plate on full throttle. Don't ask me how I know .

Silverbullet951

I won't

Wow, thanks Rage!

Puppan

[quote]Originally posted by toddk911:
<strong>In TURBO magazine a few years ago, there was a heavily modded 951 with the 3.0 motor that was running low 9's in the 1/4. I can't remember the hp, but the phiysics would suggest about 650-700 WHP.
<img src="graemlins/burnout.gif" border="0" alt="[burnout]" /> </strong><hr></blockquote>


Do you have that article?
If you have can you please "scan" it or something so I can get the chance to read it?!

Regards
Pete

Turby

Rage what kind of clutch do you use? Or anyone with 400+HP......... This always seems to be an issue, I had a centerforce dual friction and had no problems whatsoever.

K27

Anything is possible, check out the boost numbers, 42.8lbs
<a href="http://www.saabnet.com/tsn/press/020702.html" target="_blank">http://www.saabnet.com/tsn/press/020702.html</a>

toddk911

So, up to 350 whp with out slicks and power shifting, the clutch can handle it? Is the pressure plate the weak point?

I guess, anyone that is really interested in 0-60 or 1/4 miles, just invest in an upgraded clutch.

rage2

Yes, the pressure plate is the weak point! I'm using the cup clutch with the huntley/kennedy engineering 3800lb pressure plate.

StanUK951

How much stiffer is the Cup clutch with an uprated pressure plate, I mean force at the pedal? Is the bite of the clutch more severe/shorter as well??

Silverbullet951

Is the clutch harder to slip?

Silverbullet951

[quote]Originally posted by K27:
<strong>Anything is possible, check out the boost numbers, 42.8lbs
<a href="http://www.saabnet.com/tsn/press/020702.html" target="_blank">http://www.saabnet.com/tsn/press/020702.html</a></strong><hr></blockquote>

turbocharged F1 cars use to make upwards of 50 Psi.
highly modified supras make 45 psi i think.

toddk911

The F1 cars were also running about 90% Toulene.

I was wondering when this additive would come up. It always seems too.

K27

I wonder what the key is to keeping the head screwed on it with that amount of boost? maybe the correct A/F is more important than the actual boost pressure.

Silverbullet951

I Think the A/F has a lot to do with it, but I do think that there has to be a limit to how much boost you can run.

K27

Apparently this 2.0 engine was capable of more, but for reliability they detuned it.
I would love to talk to the guys that built this engine to find out how they achieved these numbers and keep it glued together.
I am sure the same technology could be applied to almost any 4 cylinder engine, but at what point does said engine no longer become the brand that built the original.
So many parts are changed that it really is only the block and head castings that are original.

951carter

I wonder what the key is to keeping the head screwed on it with that amount of boost?
~~~~~~~~~~~~ &gt;snip&lt;

Porsche welded the heads on the 917s to run big boost =0