How much vaccum does your RX7 have?
How much vaccum does your RX7 have?
06-23-08, 12:38 PM
#7
I hope Rage, surfmon and Drift all mean in/hg not mm/hg, because that's some really low vac if that's mm's.
I'm pulling 430mm/hg with a very agressive street port at 1050rpms with 975 miles on the seals and ~10k on the housings. Also built by IRP.
I'm pulling 430mm/hg with a very agressive street port at 1050rpms with 975 miles on the seals and ~10k on the housings. Also built by IRP.
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06-23-08, 12:58 PM
#9
F'n Newbie...
iTrader: (6)
The PFC readout is off by a little bit, you've got to take a mighty-vac to calibrate it exactly (don't ask me how exactly, I haven't done it).
Mine show's an average of -20in/hg and/or 450-490mm/hg. I can warm the car up and confirm when I get home.. I'm running stock ports and stock seals so far as I know. Compression is top notch though showing 8.6-9.0 on all faces when I had the test done in late Feb/Early May (about 20k on rebuild).
Mine show's an average of -20in/hg and/or 450-490mm/hg. I can warm the car up and confirm when I get home.. I'm running stock ports and stock seals so far as I know. Compression is top notch though showing 8.6-9.0 on all faces when I had the test done in late Feb/Early May (about 20k on rebuild).
06-23-08, 06:34 PM
#14
Do you have IRP's large or medium port? My housings had like 5k miles, have like 1700 miles on the build and have a large port with a little over lap, no emissions, open exhaust. I am seeing like 350 to 400mmhg depending on conditions with a power fc. It runs good but thinking it might be just a tad low.
06-23-08, 06:37 PM
#15
Do you have IRP's large or medium port? My housings had like 5k miles, have like 1700 miles on the build and have a large port with a little over lap, no emissions, open exhaust. I am seeing like 350 to 400mmhg depending on conditions with a power fc. It runs good but thinking it might be just a tad low.
06-23-08, 07:02 PM
#16
Dunno if he took a pic of mine doubt it, maybe he will post something once he sees the thread. Rich and Ihor are great guys by the way and very happy with the work they did and I really dont pay attention to the vaccum as that is not a reliable way judge your engines conditon like in the case of street port no matter what the size a compression test tells all. Haven't done that but dont see the need to if the engine is running good, I want it to suprize me when it goes.
06-23-08, 07:39 PM
#20
Original Gangster/Rotary!
iTrader: (213)
Built my motor back in 2003, has about 15k miles on the seals and around 50k miles on the housings. around -350 to 375 (14 to 15 inches) mmHg at 1000 rpm idle. Big port, although the portwork on Brian's and Matt's car is cleaner due to my experience gained over the last 5 years, plus Ihor is a skilled porter and we both share porting duties on customer cars. Compression #s are right around 7.0 bar/100 psi all around last time I checked.
