RUF 997 Kompressor DONE!!!
#46
Originally posted by 1999Porsche911
Based on the info XSrcing gave of a static compression ratio of 9.7:1 amd 9 psi boost, the effective compression ration is 15.64 :1.
Based on the info XSrcing gave of a static compression ratio of 9.7:1 amd 9 psi boost, the effective compression ration is 15.64 :1.
#47
Took a ride in the RUF Kompressor
It's Hans' personal 997. I was there. Here's my post from another board.
Not an S, a 3.6. That car REALLY pulls hard. I mean 996 turbo hard. The German tech said that my 3.8 would gain the same hp as the 3.6, but mine would have more ft. lbs. at the bottom end, "significantly more" he said, I'd like to see that. I also learned that the published price includes all labor. I know it's a lot of money but damn, all that power and reliable too? Crap. It takes about four full days to install. You don't hear any whine from the supercharger and you really can't see too much in the engine compartment. Next time I'm there I'll take pics. I've thought seriously about getting the kit but am going to wait for the new turbo and have them sprinkle their magic dust on it instead.
Not an S, a 3.6. That car REALLY pulls hard. I mean 996 turbo hard. The German tech said that my 3.8 would gain the same hp as the 3.6, but mine would have more ft. lbs. at the bottom end, "significantly more" he said, I'd like to see that. I also learned that the published price includes all labor. I know it's a lot of money but damn, all that power and reliable too? Crap. It takes about four full days to install. You don't hear any whine from the supercharger and you really can't see too much in the engine compartment. Next time I'm there I'll take pics. I've thought seriously about getting the kit but am going to wait for the new turbo and have them sprinkle their magic dust on it instead.
Last edited by FlyingLow; 01-11-2006 at 02:13 PM.
#49
JUST GOT BACK FROM RUF(DALLAS) THIS WEEKEND. WAYNE WAS NICE ENOUGH TO GIVE ME A RIDE IN THIS 997 KOMPRESSOR.. WOW!!!!!! AMAZINGLY FAST!!PULLS HARDER THAN MY GT3,HANDS DOWN.IF ANYONE HAS A CHANCE TO GET DOWN TO DALLAS,A RIDE IN THIS MACHINE IS WELL WORTH IT.GREAT GUYS WITH GREAT PRODUCTS(GROWN MANS TOY STORE)
#52
Originally posted by XSrcing
It is north of 400 RWHP.
It is north of 400 RWHP.
![Big Grin](https://www.6speedonline.com/forums/images/smilies/biggrin.gif)
#53
Originally posted by XSrcing
It is north of 400 RWHP.
It is north of 400 RWHP.
Last edited by deputydog95; 01-11-2006 at 07:09 PM.
#54
1999: what is the HP gain per psi on a 3.6 motor? i've heard approx. 20-25
also, what is the HP loss associated with lowering the compression?
is there a formula to guestimate how much RWHP this car should have?
based on 20HP x 9psi + an approx base HP of 275 should net a RWHP of 455 - minus whatever the lowered the compression losses are.
am i way oversimplying this?
also, what is the HP loss associated with lowering the compression?
is there a formula to guestimate how much RWHP this car should have?
based on 20HP x 9psi + an approx base HP of 275 should net a RWHP of 455 - minus whatever the lowered the compression losses are.
am i way oversimplying this?
#55
Originally posted by deputydog95
looks nice. you almost wouldn't even know it's there from appearance. it's a lot more subdued without the green and yellow parts![Smilie](https://www.6speedonline.com/forums/images/smilies/smile.gif)
did you do a base line dyno before install?
how long does the entire install take from start to finish?
what psi is it running at?
this is the first one in the states, right?
what kind of "hang ups" did you encounter and when will the kit be officially ready for release?
not that it matters, but do you work for the RUF auto center?
keep us posted. curious to see the "after" dyno run.
looks nice. you almost wouldn't even know it's there from appearance. it's a lot more subdued without the green and yellow parts
![Smilie](https://www.6speedonline.com/forums/images/smilies/smile.gif)
did you do a base line dyno before install?
how long does the entire install take from start to finish?
what psi is it running at?
this is the first one in the states, right?
what kind of "hang ups" did you encounter and when will the kit be officially ready for release?
not that it matters, but do you work for the RUF auto center?
keep us posted. curious to see the "after" dyno run.
You're looking at the power increase formula to simplicticly. There are only three primary ways to make more power ---- increase the displacement, increase cylinder pressure, or increase rpm. There are many things that effect the power increase in an engine as well as what the power curve will be. Forced induction is an easy way to, in a sense, increase the displacement of an engine. Adding more fuel to the increased, denser air in the cylinder will provide more power. However, timing has to be adjusted depending on the normally expected parameters of the engine's operation. What you do with the timing can have a drastic effect on the perfromance of the engine as well as what the power curve will be.
For instance, if you have a low compresion engine, as in the case of the RUF modified engine, you can run a higher (probably stock) timing setting and fuel/air mixture during low boost and slowly retard the timing as the boost increases. With an engine like yours that is starting at a higher compression ratio, the timing must begin to be retarded much sooner in order to maintain the same safety. Retarding the time is effectively robbing the engine of power. All this can be adjusted in various ways such as adjusting the fuel maps at various points in the rpm range.
Therefore, you cannot simply say that the RUF will be slower or faster than the EVO unit that is using less boost, even if the effective compression ratio is the same. Although the RUF unit will have less power without boost, timing can be maintained at an advance setting for a longer period in the power curve, possibly making up for any loss as soon as boost is present. Because boost is lower further into the power band, fuel mixtures can be adjsuted leaner for increased power.
This is all hypothetical as I do not know the setup of the RUF system. In short, simply increasing boost will not always increase power or performance. Increasing boost the wrong way can also cause you a loss in power. Boost increase must be done in conjunction with timing and fuel adjustment to take full advantage of the increased air available to the engine while maintaining a certain level of safety. Otherwise, you could get one of these:
Last edited by 1999Porsche911; 12-28-2006 at 11:57 AM.
#56
that was good writeup. hope i don't ever see one of those pistons in person (knock on wood) ![Smilie](https://www.6speedonline.com/forums/images/smilies/smile.gif)
how much HP loss do you think is equated with lowering the compression in the RUF application?
![Smilie](https://www.6speedonline.com/forums/images/smilies/smile.gif)
how much HP loss do you think is equated with lowering the compression in the RUF application?
#57
Originally posted by Kevin D
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...
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...
![Smilie](https://www.6speedonline.com/forums/images/smilies/smile.gif)
![Smilie](https://www.6speedonline.com/forums/images/smilies/smile.gif)
#58
Originally posted by deputydog95
that was good writeup. hope i don't ever see one of those pistons in person (knock on wood)![Smilie](https://www.6speedonline.com/forums/images/smilies/smile.gif)
how much HP loss do you think is equated with lowering the compression in the RUF application?
that was good writeup. hope i don't ever see one of those pistons in person (knock on wood)
![Smilie](https://www.6speedonline.com/forums/images/smilies/smile.gif)
how much HP loss do you think is equated with lowering the compression in the RUF application?
#59
Originally posted by sticky
The reason the RUF doesn't make more power than the evo is it needs added boost to make up for the HP lost due to the compression drop.
The reason the RUF doesn't make more power than the evo is it needs added boost to make up for the HP lost due to the compression drop.
so why bother lowering the compression if you're not going for over the top HP?
unless of course they get a much bigger bottom end boost than the EVO kit with the added boost. that would be a great setup even if they didn't make more HP than EVO. it would be the best of both worlds between the EVO and the TPC.
#60
Originally posted by deputydog95
so why bother lowering the compression if you're not going for over the top HP?
unless of course they get a much bigger bottom end boost than the EVO kit with the added boost. that would be a great setup even if they didn't make more HP than EVO. it would be the best of both worlds between the EVO and the TPC.
so why bother lowering the compression if you're not going for over the top HP?
unless of course they get a much bigger bottom end boost than the EVO kit with the added boost. that would be a great setup even if they didn't make more HP than EVO. it would be the best of both worlds between the EVO and the TPC.