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Bf Mk2.5 Home Build - 309Rwkw On 15Psi


IT15ON

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Maybe she's just listening to itunes? BAHAHA

Haha she said she would listen to the knock sensors, I swear.... maybe it sounded like a new remix with the extra ping ping noises coming through ;p

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So after a couple of teething issues with fuel pumps, including it leaving me stranded a couple of times, I have been a bit off the car. As we all know, modifying cars is never smooth, and it's all sorted now after a bit of stress. Tim travelled a long way the first time to help me get back on the road, it's good to have mates willing to help out.

Last Wednesday night I got back to the drags!! The big test finally. Spent the morning giving it a wash and packing all my gear and then headed down to Sydney in the arvo.

I got a total of 5 runs in which I was very happy with. On the first run I discovered we still need to finish the tune properly, hitting boost cut in 3rd. This happened every run, so I didn't get a clean pass. Launch, run half track or so, hit cut, loss of power, get off it then back on. That considered, a few time slips are below.

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Best run was a 12.89 pass. Considering I hit boost cut, and had socket sets, 2 18" road wheels and tyres, and my usual 17" spare all in the boot, I think it's a fair time. Should be a lot of weight there to be removed next time around and of course staying on the throttle all the way will cut times down a lot.

As you can see I got a bit over it toward the end of the night and just rolled over the line. Was good to run some 1/8ths though and go through the motions of a drag day. I still had a great night which was made better by winning the reaction time competition with a 0.003 light!

Unfortunately I wasn't there to do big burnouts, and the smokey ones weren't photographed. Couple of pics from the day though:

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We will touch up this tune and then I'll go back for more. Oh, and I've also got Atomic valvesprings and the tool sitting on my loungeroom floor.....

Edited by IT15ON
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  • ...JD TUNING ADELAIDE...
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Hey mate well done nothings smooth hey but u got to get into it

Top stuff on going to the strip it all backs up the hard work and then you can also see the improvement in "real world"

Those slips are suggesting about 240rwkw but very hard to say if your cuts/limitors/reductions aren't set right

Bit of a ball park that we tuned a few of now is ~ 118mph for 300 ish rwkw with ZF

Did you use that valuable track time to data log ? If not do so the data is amazing ;)

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Hey mate well done nothings smooth hey but u got to get into it

Top stuff on going to the strip it all backs up the hard work and then you can also see the improvement in "real world"

Those slips are suggesting about 240rwkw but very hard to say if your cuts/limitors/reductions aren't set right

Bit of a ball park that we tuned a few of now is ~ 118mph for 300 ish rwkw with ZF

Did you use that valuable track time to data log ? If not do so the data is amazing ;)

Yeah I'll always aim to get back to the track. Yeah the mph should be down, how would you compare it to say 300rwkw cars at the 1/8th mile point or 1000ft? This could be a more realistic comparison because the issues only came late down the track (not sure how far down exactly but yeah).

I didn't take the logging gear because Tim has been using it for some changes on his car. Once I ran that first pass I wished I had it, best I got was the go-pro on the guages but cant use that to tune, just review the run a bit... next time..

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Well everything effects the outcome so just use this as a guide

305rwkw FGF6 ZF

Definitely quicker than mine.... Looks like I need to sort out that launch, he must be stalling it up harder than I was....

Back to the track for more practice then

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Hey Bellend bloke....would 305rwkw in a FGT be the same mph as 305rwkw FG F6? Cause smaller turbo has faster spool and therefore if you short shifted gears you might reach a faster mph at the end?

And 60ft don't affect mph does it?

And OP....0.003 reaction time is pretty crazy. You would do good for drag races like on Street Outlaws :P

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  • ...JD TUNING ADELAIDE...
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305 in a FGT pumps a 305 in a FGF6 to the 660 mark no question but it all levels out in the deep end as the FGF6 has the legs

We did a FGT with 290rwkw and it went 12.10@115mph so u can see its all kinds of close but the FGT did fall over in the deep end looking at the logs

MPH is reflective of power vs weight so yeh 300 rwkw small or big turbo should net simular MPH

Edited by Wombat Bellend
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