Diffrent sound?
 

Ok so im driving and my car is running great, after a nice spirited drive i stop at a light, my car is idling at 750rpm, and before it used to idle at 1000rpm, and now kinda has a "lumpy cam" noise? can that be normal from a hard run? And i notice my oil pressure is a bit lower than what it was normally at, and just now checking the oil its a bit on the low side (planning on toping it up.)

Also some other questions, i just got my car back, its been a year since i've driven it, its a single gt35r turbo with a small street port, what oil should i be using in the engine.

Last thing, i bought some carbon fiber scuff plates (go in the door jams) any one have any experience in installing this kinda item?

Ok, this is the last thing, I have a kaaz two way clutch put in...it chatters really really bad during low speed cornering and going from a standing point..is that normal

Thanks

The idle issue is a tough call on a modified car. What else have you done to it? What kind of tune are you running? Check back with us after you've topped off the oil, though I don't think that's the cause of the idle issue, if it is an issue at all. My car idles at a steady 800 rpm without load after it's completely warm.

I use mineral 20w50, I don't know why a different turbo would require a different oil.

The stock scuff plates simply clip into place; I imagine that aftermarket pieces must do the same.

With the KAAZ, a little differential chatter is normal. This is common in most, if not all, clutch-type differentials.

Blitz SBC I-Color
PLX R-500 Datalogit, and Wideband
Exedy Twin Plate Clutch
Exedy Light Weight Flywheel
2 Way L.S.D. Kaaz
GT35R .70
T4 Manifold
44MM WG TIAL
50MM BOV TIAL
HKS Twin Power
3in Megan Racing Midpipe
3in RX-7 Store Downpipe
Apex'i N1 Exhaust
Trust/Greddy 3Row Intercooler W/ Elbow
Racing Rad and Fans
KG Parts Primary Fuel Rail
KG Parts Secondary Fuel Rail
850cc Injectors x2 (Primary)
1600cc injectors x2 (Secondary)
Aeromotive FPR
Greddy Pulley Set
Greddy Catch Can
Greddy Turbo timer
2x Walboro 255lph Fuel Pumps
Microtech LT8s
Solid Polyurethane Engine Mounts
ATTAIN Urethane Differential Bushings

^ My mods.

I'm just scared i blew something, since it sounds a bit different than before. The engine is rebuilt about 10,000 miles ago, and the turbo has around 250 miles on it.

Oh i figured out the scuff plates, i had to actually screw them in.

Thanks for the info on the clutch, i do have solid mounts so i guess that makes a difference.

bump

For the oil pressure problem, I'm almost positive its because the oil pump is directly linked to the eccentric shaft, therefore a lower idle would be the cause of the problem. I hope I got this correct, I'm pretty sure I just read this from Mahjik several days ago, but I couldn't find it in his old posts:(

Funny idle - check for any vacuum leaks after the throttle body. A vacuum cap that's popped off is a very likely culprit. A vacuum leak will raise the idle, make it rougher, and drop your manifold vacuum.

Dale

Tough call but either a vacuum leak or the TB AWS.