Silvia Club of NSW

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PostPosted: Sat Jun 12, 2010 8:48 pm 
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T25

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Car: S13 SR20 K's
i just bought an s13K with and SR20 and when it gets to about 7-8 pound it fails out and backfires a bit and there is no boost! any recomendations?


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PostPosted: Sat Jun 12, 2010 11:46 pm 
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Check for boost leaks. loose piping and such.


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PostPosted: Sun Jun 13, 2010 11:38 am 
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T78 Hybrid
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7-8k? valve bouncing??

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PostPosted: Sun Jun 13, 2010 1:36 pm 
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Takumi
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if there are no air leaks it's most likely ignition related.
Might just need new spark plugs (NGK BKR6E11s are easy to get, and cheap - you just need to gap them down to .8-.9mm)


If it has an aftermarket blow off valve check that the vacuum line is connected and that there are no leaks between the BOV and the intake manifold in the vacuum lines.

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PostPosted: Mon Jun 14, 2010 10:14 am 
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DumHed wrote:
Might just need new spark plugs (NGK BKR6E11s are easy to get, and cheap - you just need to gap them down to .8-.9mm)


Or you could just buy BKR6E's which are already gapped to 0.9mm.


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PostPosted: Mon Jun 14, 2010 3:14 pm 
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Takumi
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it's extremely rare for those to be in stock anywhere though, so you end up having to order them in. Most engines run 1.1mm gap.

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PostPosted: Mon Jun 14, 2010 4:54 pm 
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Really? wow. I guess the two boxes I bought off the shelf a couple of months ago from precision auto spares in bondi must have been really rare then.

ordering in for most auto shops means a couple of hours to a day or two at the worst. it's not like it's some obscure plug for a lawnmower or something...


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PostPosted: Mon Jun 14, 2010 7:41 pm 
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Takumi
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good buy!

so, if the shop stocks BKR6E9s, get those - otherwise it's easy to gap down the 11s, which in my experience have been a lot easier to buy on the spot.

I had a steel ruler which worked perfectly as a gap gauge :)

CJ8s for almost all lawnmowers are available at every servo, supermarket, and hardware shop :P

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