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Hello everyone , I am currently building a 3.2 L with an RB26 cylinder head my block is stock and I will run E85 and E100 My mapper who is Romain Levesque from dear RaceCAL LtD (former syvecs technical director) asks me to make a ratio of around 9.5. so after reading a lot of topics on it I found pistons with a CR 9.0 and 10.0 expensive IRP what direction would be taken to achieve a ratio of 9.5 without having to plane the block by 2mm or to do it a minimum, but to be able to play with the thickness of the cylinder head gaskets thank you in advance for your response
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By Murray_Calavera · Posted
Yep, factory alternator. Fuel pump wiring isn't bad. Not perfect, but isn't bad. The gauge of wire has no issues supplying the 20 amps, the only issue is I'm using the factory connector in the fuel pump hanger which I'd be amazed if they are rated for 20 amps... but nothing has melted so far lol. It's also got the typical relay direct power from battery etc. -
By Murray_Calavera · Posted
Basically, yep. However I can't see you fouling plugs from that alone though (not enough time spent in the rich condition to do anything meaningful to the plugs). If I cast my mind back 15 or so years ago to the I last time I saw this actually happen in person, it just made the car really grumpy for a few seconds and nearly stall and only really had any effect at low speeds/low engine speeds. For sure this is the perfect excuse to get an ecu, delete the maf sensor and keep the bov lol. -
If it's an original "dumb" style alternator, you should be seeing your voltage running, in the 14s A healthy lead acid, charged, is 12.8V, so if your engine is running, and you're seeing 12.8V, you have issues. If you're at 13V, you have very little power going back into the battery. I'm going to guess you probably need better wiring to the fuel pump too, as I bet you have a voltage drop on your wiring to the pump too, and it's probably seeing sub 12V
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Yeah vents to atmosphere... So the issue I think is that the stock ECU isn't accounting for the loss of air and effectively it's a vacuum leak, so it will run rich and foul plugs etc?? is that right?
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