deleting cat on a stock 305 tpi
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deleting cat on a stock 305 tpi
i bought a straight pipe from mac performance to replace my cat before i did this change i timed my q -mile i got a consistant 15.69 i have a 1986 305 tpi ws6 now i can tell you i have a hypertech chip, 8 mm wires , airfoil ,free flowing muffler, and k@n airfilter,that time q mile time was last year with the original tires because my car has 38 000 kilometeres now last week i also put some new tires and changed the gears to a 3.42 posi last year i had the 2.77 so can someone please tell me why the hell i'm running 15.9 ??????
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what tires did you get? they can make a huge differance. I found that the gsc goodyears were the worst tire I had ever put on the car they are such a hard tire they can't grip well. it seems like the cheaper the tire (usually softer) the better the traction to a point. get too cheap and you are back to were you started. all you end up with are smokers. the last set I put on are the nittos drag radial and at first they seemed kinda close but, when you race they make a huge huge differance. they spin just as easy but, hook a lot quicker.
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guys i can't even spin them they are remington 245 50 zrated the car just bogs out off the line i think its the deleted cat i am going to put the original back on
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Try switching out that Hypertech chip with the stock EPROM. You might be getting knock retard which is forcing your car to lower your timing a few degrees... That's the only thing I can think of that would be causing such weak times. Although maybe your car just wasn't ment to go fast as it is???
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