Seems to me with the RUF will have the reliability in its favor but EVO will have performance in their favor. Only way to find out if the latter is true is to run them side by side...

 

We got some numbers from a Dynojet 248c, but we are going to wait on a second opinion (another dyno session at a different location) before we release the figures.

The numbers we got were almost too good to be true.

 

what are you basing the reliability comment on?

 

i'm not certainly not a tuner, but what is the logic behind lowering the compression to run more boost?

 

You can move more air while maintaining a safer effective compression ratio.

 

OMG....this is all VERY interesting information we've got here. I didn't even know there were compression lowering head gaskets available for the 996 motors*** That's awesome! It's makes it entirely possible now for EVO SC'ed cars to lower their compression down to 9.7-to-1 and safely up the boost to at least ~8+ PSI. Pushing rwhp numbers for the EVO from ~405@5PSI to approx. ~450@8PSI. I know the supercharger used on the EVO isn't anywhere NEAR its flow capacity and that system would have NO problems handling an extra 3PSI with a simple retune & supercharger pulley.
BTW, 8 psi on a 3.6L 996 would be absolutely sick, easily equivelent to a stage 4+ 911TT in acceleration. Given the weight and driveline advantages.

---Kevin

PS:...with nearly 9PSI boost I don't see how RUF's kit doesn't EASILY make over 400rwhp...and they advertise only a 80HP gain to make it 400BHP total?? LOL. PLEASE post all the dyno results for the RUF kit...

 

now i've seen this done on high hp/boost turbo applications, and that makes sense to me.

i'm just not sure i understand why ruf did this for this particular application. why lower the compession to run 9psi instead of running 5 or 6 psi at the standard compression. the evo 997s 3.8 liter is making a little over 450 to the wheels with the standard compression.

should we expect the 3.8 RUF to make a lot more HP than the 3.8 EVO based on their compession and boost levels?

 

We just got back from the second dyno session. But we have decided for our reasons that we are not going to publish the numbers.

Don't take that the wrong way, we are ecstatic with the performance the kit has delivered!

If you give Hans or Wayne call, or even better, stop by. They can give you any information you would like.

 

You know I don't give a hoot about HP claims on any car. Performance is the test.

 

Alittle disappointed but if you like the results that's what counts.

 

please post the dyno numbers!! very interested....

 

very disappointing. i thought you said the numbers were too good to be true. something wrong with the setup? not getting full boost? details please. if you are not going to post the numbers please state your reasons why then we can all stop scratching our heads... at least for a while.

can you guys do timed runs instead of dyno plots?

 

if it isn't designed for high HP then do you get what you pay for? hmmm......

 

ya got that right! i am hoping the same compression lowereing can be done for the evo kits rather than lower compression pistons. then you'd have to address the cylinder head bolts, wrist pins, bottom end... then go at least 10 PSI

the VF charger states that it is good for 20PSI!!!

as was stated earlier it's 9PSI @ 9.7:1 compression ratio compared to 11.3:1 stock.

 

i hear ya, i'd love to see performance figures too but no one stateside seems to be doing 60-130PMH tests, only quarter miles. the 1/4 is alright but the launch is a big factor. no?