jayscoobs

Hello, Ive been putting this question off for a while because it may or may not be a dumb question. I have been reading numerous turbo threads and build for the past 6 months and I came across once or twice someone saying they lowered redline for FI.

I realize that the stock Greddy turbo doesnt flow enough to 9k so people shift earlier. Basically im curious if there is any other reason to lower redline than to run a smaller turbo. I think I have read that it may be better heat management because your not winding out the motor to a high redline while under boost?

My second question is I have read of someone doing Pport intake ports but I was wondering if it was possible to cut Pport exhaust ports in our engine? and either blocking off the side ports or using them as well? I know theres got to be a coolant jacket or something in the way of doing this? Just curious and sorry for dumb questions as info is quite spread around. Thanks.

Brettus

iTrader: (2)

The stress generated on the internal engine components increases substantially as you approach the 9k red line . In a turbo engine you also increase the stress substantially so it makes sense not to do both .

Typical turbo Renesis engines peak at about 7500 so not much point revving much higher than 8-8500 anyway .
And a lot more heat is generated at higher rpm - keeping rpm down assists with this as well.

The port question : of course - anything is possible with enough money/skill/persistence . Easy - no .

jayscoobs

Thanks Brettus, so do you just shift early or did you actually do a fuel cut at a specific RPM? You using upgraded Greddy turbo right?

Brettus

iTrader: (2)

I limit mine to 8300 via the rev cut (not a fuel cut) .
Running an upgraded Greddy .

jayscoobs

Awesome. just got to figure out what location I want.

california style

shifting early just saves wear. you dont need to do it. Basically as Brettus says! (/shuts up and wanders off)