1st time to the track using a BW8374 EFR internal gate.
#1
1st time to the track using a BW8374 EFR internal gate.
Made it out to the track on Saturday for test n tune. It was partly sunny and cool. Beautiful day for racing. Anyway, it was the first time I had run my FD. Of 5 passes, my best was a 10.83 @ 130.3 with a 1.57 60'. On 93 pump gas and AI and 100% stock ports. The car was bogging off the line. Some runs worse than others. I know I have a couple of things working against me when it comes to the short time. I'm running a t56 with a 2.66 1st. And I'm using the Exedy twin disc clutch which uses a lightened flywheel. This is a street car before a track car so I don't really want to install a drag clutch. Since the t56 has a .5 overdrive, I think I would benefit greatly both on the track and street by switching to a 4.56 gear. I could leave with less bog and 6th gear would be usable under 80mph lol. I'm open to any suggestions. Thanks
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tony94s4 (09-30-20)
#3
Thanks for the compliment. Yes, in fact it has an 8.8 now. After I munched the torsen last fall, I decided to replace the entire drive line last winter. I'm also using a launch control that I built using a line lock and custom orifice. I have the orifice at .015". But it is still to big to slip the clutch enough to overcome the bog. I ordered a fine adjustable hydraulic needle valve to replace the orifice. I'd like to get a good run in with no bog to see exactly how well the 4.10 gears will perform before I go and make a change. I hope the weather will hold out long enough.
#4
Rotary Motoring
iTrader: (9)
Great times for such a street-able set-up.
Seems like you are barely using 4th since it should be 116mph in 3rd with current set-up at 8,000rpm. I bet 4.56 rear will really help as it brings 3rd down to 104mph and still allows for trapping at 136mph in 4th (again at 8,000rpm).
Gear Ratio Speed Calculator
Seems like you are barely using 4th since it should be 116mph in 3rd with current set-up at 8,000rpm. I bet 4.56 rear will really help as it brings 3rd down to 104mph and still allows for trapping at 136mph in 4th (again at 8,000rpm).
Gear Ratio Speed Calculator
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#8
B O R I C U A
iTrader: (14)
Made it out to the track on Saturday for test n tune. It was partly sunny and cool. Beautiful day for racing. Anyway, it was the first time I had run my FD. Of 5 passes, my best was a 10.83 @ 130.3 with a 1.57 60'. On 93 pump gas and AI and 100% stock ports. The car was bogging off the line. Some runs worse than others. I know I have a couple of things working against me when it comes to the short time. I'm running a t56 with a 2.66 1st. And I'm using the Exedy twin disc clutch which uses a lightened flywheel. This is a street car before a track car so I don't really want to install a drag clutch. Since the t56 has a .5 overdrive, I think I would benefit greatly both on the track and street by switching to a 4.56 gear. I could leave with less bog and 6th gear would be usable under 80mph lol. I'm open to any suggestions. Thanks
Hell of a pass! Was that on street tires?
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KNONFS (10-02-18)
#15
I hit 26 lbs of boost. Turbosmart canister with all 3 springs, no boost controller, straight off the canister. I was planning on turning it up but people kept oiling down the track. I only got in the 1 pass. The turbo really wakes up past 25. Roughly 8000 at the finish but I wasn't paying close attention. I have the close ratio t56. Mine is 2.66 also. The 4.56 seems just right. It really helps overcome that tall 1st gear and can actually use 6th gear at 70 mph. With the 4.10 I had to be going 80+.
I am running the Exedy twin disc. I figured out a way to incorporate it with the t56. I have to agree with Howard Coleman, it is a fantastic clutch and very streetable.
I am running the Exedy twin disc. I figured out a way to incorporate it with the t56. I have to agree with Howard Coleman, it is a fantastic clutch and very streetable.
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