I think I broke a rod...

[perfworks]

i want to run 12 psi on the street constanlty. my boost controler will allow cockpit control up to 19psi on demand with the module we are tuning for the track. the static compression for the street of 9.1:1 is to high because of the availability of high octane in pump gas.
what im saying is that when i turn up the boost on the street i dont want to run into detonation because i am not running race gas the day i decide to kill a 911 .
sounds childish but how many times someone **** with you on the street and you really want to blow his doors off. not just beat him but literally astonish them.

 

[perfworks]

it doesnt sound like much but that .5 in static compression could save my motor.!!

 

[LinuxRacr]

What octane are you talking about running? And I wonder if it is too late to drop my compression? (hmm)

 

[perfworks]

well i wouldnt go under 94
if there isnt a sunoco around 93 but will always have octane booster in the car just in case.
we are also looking into a water alcohol mixture to spray into the manifold at high rpms to cool the charge

 

[perfworks]

call them see whats going on.
really he suggested 8:1

 

[LinuxRacr]

See, I was also worried about off-boost response. I think if you set the boost high enough, it may offset the low off-boost response huh?

 

[perfworks]

i never really sat down to think about the compensation with boost untill recently .
i started to understand why they wanted to lower the compression after doing some research.

lower static compresion atually helps with volumetric efficieny.
yes when your boosted it will als increase over a N/A motor butt you allow that extra bit of negative pressure to fill with an A/F mixture that gives you the oprtunity to develop more torque.
its kind of confusing but after you think about it it makes sense.

 

[perfworks]

im not exactly explaining it properly right now because i am really tired and going to bed
the girlie is screaming i am on here too much


later

 

[LinuxRacr]

She's right! You have 470+ posts in one month! Go TO BED!! Hit it real quick, and she will be apeased for a little while.

 

[Kooldino]

perfworks - Yeah, I don't understand your explanation here.

Hey, btw, I'll be starting my turbo project during the week (installing FMU, gauges, O2 voltage clamp, etc), if you're not too far from the A.C. area, let me know if you wanna get together and help out.

 

[perfworks]

She's right! You have 470+ posts in one month! Go TO BED!! Hit it real quick, and she will be apeased for a little while.

damn how time flies.

 

[perfworks]

perfworks - Yeah, I don't understand your explanation here.

Hey, btw, I'll be starting my turbo project during the week (installing FMU, gauges, O2 voltage clamp, etc), if you're not too far from the A.C. area, let me know if you wanna get together and help out.

kooldino ill explain in person. i have the next two days off so give me a call.
i pmed you the phone #

 

[LinuxRacr]

Well, here are my latest developments:

I finally got my axles out yesterday. What a pain in the ass!!:mad: I also talked to Pauter today, and My JE Pistons look to be finished! I was calling them about lowering the compression to 8.5:1, but it looks to be too late. I could have them by the end of the week! ZOOM ZOOM!!! (thumb) Next, I will number my conectors on the wiring harness, and comence to taking my engine out!.

 

[LinuxRacr]

I just took the engine out! That damn thing is finally out!!!(yippy)
Here are some pictures:

 

[LinuxRacr]

The Weak stock mounts

The infamous rear motor mount!

The WEAK front mount
Notice it is torn:

 

[LinuxRacr]

The Replacement mounts:

 

[nobody]

lowering the com ratio to 8.5/1 is old thinking,unless you want to run a lot of boost, even you have 10/1 it's still ok to run 8-10 psi.
look at the 996TT..It has 9.4/1 comp. it's still running 14psi of boost stock! how boost u could run is depend on the compound of static compression & boost...e.g.hi comp--low boost, or low comp--hi boost, I myself prefer the hi comp low boost route..it's way more responsive & useable..no turbo lag..behaves like a much larger motor....FYI, I'll be going to almost 10-1 comp if i redo my pistons & rods

 

[LinuxRacr]

Yeah, the funny thing is that folks like Kenny Tran of Jotech is running high compression and good boost in his 8 second Honda hatch.

 

[ZG77_OzZ]

Wow

 

[perfworks]

lowering the com ratio to 8.5/1 is old thinking,unless you want to run a lot of boost, even you have 10/1 it's still ok to run 8-10 psi.
look at the 996TT..It has 9.4/1 comp. it's still running 14psi of boost stock! how boost u could run is depend on the compound of static compression & boost...e.g.hi comp--low boost, or low comp--hi boost, I myself prefer the hi comp low boost route..it's way more responsive & useable..no turbo lag..behaves like a much larger motor....FYI, I'll be going to almost 10-1 comp if i redo my pistons & rods

old thinking hey.
allright your allowed to have your opinion.

by the way what does turbo lag have to do with static compression.?
by the way FYI good luck with detonation at 10:1
excuse me its time for me to rock in my chair for a while