GT4088R Turbo on Bridgeported RX-7 Rev, Spool and Shutdown

Starting, revving and shutting down my aux bridge high compression 6 port turbo RX-7 looking into the mouth of the GT4088R ball bearing turbo. Notice the easy spool and count how many seconds it takes the turbo to stop spinning after the car is shut down. Talk about turbo response! 10 PSI by 3000 RPM at less then 70% throttle.

The entire build process of this car can be found at http://www.aaroncake.net/rx-7/projecttina

Category:

Autos & Vehicles

Tags:

• GT4088R
• turbo
• bridgeport
• rx7
• mazda
• rotary
• wankel
• spool
• BOV
• engine
• custom
• intake
• exhaust
• blow
• off
• valve
• garrett
• holset
• turbonetics
• automobile
• racing
• mod
• vehicle

[aaroncake]

@connertofu1 An old school Apex'I Twin Chamber. Nice and respectable, not screaming loud. Also adjusted a little tight so it doesn't "Psssshhh!" every time I close the throttle (seriously, there are bunch of SRT4s/Neons around here with BOVs so loose they vent 5 times just pulling into a parking space...how very stupid).

[aaroncake]

@hissy08 Oil is required to lubricate the bearings and also for cooling. Water is to cool the CHRA (center assembly). Older turbos were oil cooled only and thus suffered from oil sludging and coking problems if shut down hot. Newer turbos are also water cooled. Water continues to circulate after the engine has been shut down due to convection, so those turbos don't have the same thermal issues and are far more reliable and don't require special treatment.

[ismokewead420]

nice. i am going to get an invisible airfilter for my car too.

[gvdpyr123]

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[00gtr34]

Hoooly mother is that your kitchen table cause you can eat out of that engine bay =D 

[OverTheTop94]

I got an '88 patrol that runs 19psi and 4000rpm, you can beat japanese cars!

Sweet ride btw, REALLY nice looking engine bay, very nice job, i bet she fly's!

[aaroncake]

@bubbyj 255 is about the limit on the RX-7 before you start having to cut things. 245 all seasons will be fine on the rear for daily driving, certainly less crazy and easier to handle than the current 215s. Then i can switch to a larger stickier tire for track use.

[aaroncake]

@blahblop123 Since I daily drive the car, a set of Rs probably isn't ideal. But I really should increase the amount of rubber regardless. And then get some cheater slicks for the drag strip and a set of Rs for the autox and road course. And suddenly I have 3 sets of wheels in my garage...

[bubbyj]

@aaroncake Wow 185? That's crazy. I'm runnin a RB25det/gt3071 in an s14. It dyno'd at 370rwhp and I'm running 245's. It still gets squirelly on the cold days but grips just fine as long as it is warm. I'm still learning to launch it but it will dip in the 11's with a good enough 60ft. Then again you have a hundred HP at the wheels more so I dunno if 245 would be enough. Could you fit bigger without cutting into the fenders or anything?

[blahblop123]

@aaroncake the ZR1, Z06, Viper srt10 ACR, gumpert apollo, GT2 RS and the radical's used DOT competition tyres for the low 7 minute nurburgring times... whereas the nissan GTR and the lexus lfa were using potenza re070's ... most people dont understand exactly how much more grip these tyres can produce and how poor they are in all other conditions apart from warm and sunny..

[blahblop123]

@aaroncake its because they have small turbo's they spool very early in the rpm just by feathering the throttle... this is a very big turbo you need to mash your foot a more to make it spool... you only need 1500rpm or less to park, i dont think this spools enough at 1500rpm