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Old 09-05-2008, 03:12 AM   #1
SpendOne
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Join Date: Feb 2005
Location: NE Philly
Member #144

My Ride:
1987 Mazda RX7 LQ4 Turbo

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UPDATED!! Finally got home from Atco at 3am!!!

After a long night I just got home. My car broke on the last run , pic is after this story. I just recently installed a new turbo since my old one is going to be sent out for repair, leaking oil out of oil seal/cir clip. So since the new turbo went on, I was curious to see what it will do. i knew from the gate that this thing will spool slower then anything I have ever owned. Its a Holset with a 14cm T3 Turbine housing (comparable to a .80-.90 a/r). Took the car down the 1/4 and it finally hit full boost at 6500rpms. The turbo flow rate at 33 psi was showing 55lbs/min which it decent. I just didn't have the revs to take advantage of it. The car went a best of 11.9@122mph on 93 pump and blowing the tires of as usual.

So to cut it short, it was the last run of the night and the car FINALLY hooked! I over revved first not knowing that it was going to come out as good as it did. Limiter is set to 8500 rpms on stock motor and valve train. Needless to say the car really didn't go anywhere past 1st gear. My guess is that I floated a valve which decide to take everything else out along its way.

Here is a pic of the damage without taking anything apart. Looks like the valve is stuck on the topside of the piston through the plug well.
Attached Images
File Type: jpg BrokenPlugCropped.jpg (16.3 KB, 103 views)
File Type: jpg BrokenPlug2.jpg (40.4 KB, 175 views)
__________________
1993 GSX - 10.8@135 Stock motor & Trans - SOLD
1987 Mazda RX7
Single turbo LQ4 - 9.2@150 - SOLD
1980 Ford Fairmont 4Dr
LQ4 Turbo AGAIN

Last edited by SpendOne; 09-14-2008 at 06:05 PM.
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