I have a friend with 1995 vette auto , 2.73 rear, hypertech programmer ram air intake and flow master mufflers and the fuel pressure was pushed up to 45 psi. Out side of that his motor is stock and runs 12.90 to 12.93 and about 107 to 108 in the 1/4. With that being said i have 1997 c5 a4 and want to know what i need to do to better his time in the 1/4 without spending major money. Times are a little hard right now and i dont have much to spend but im sure you guys out there know what i can do to beat up on him a little w/o the use of nos still keep the motor stock (for now ) i know the ls1 is a much better motor that the lt1 and kinda figured maybe the vara ram,a good catback system and a little tune would but me where i wanted to be
any suggestion would be great

 

a good set of 3 42 gears and a stall would do tte job .you willpe him out wit just that set up .on a4 cars thats the best bang for the buck .good luck

 

Your ideas VR,cat back and tune (drop your rear tires to about 25 and pump the fronts to about 40) and you should be pretty even or have a slight edge!! Leave on the 3rd yellow and you should have him easy!!

 

That's a real good time and mph for a 95 with those gears and mods. Have you seen the time slip? I think mid to low 13's are more likely.

The 2.73 gear is pretty bad, the hypertech does little, and the flowmaster are considered pretty restrictive by most. I beat a few stock C5's with my C4 when it was stock but that was probably due to my superior driving.

 

i know i keep telling him that for what is has the car is really quick.i ran his car several times and with me driving it is usually 13.00 @ 106 MPH

 

Of the stock heads I've seen off the LT1's, the head marked W2 on each engine has its front exhaust valve seat not quite fully seated in its bore, its rim protruding noticeably into the chamber. That's a hot edge. Any engine with a knocksensor-based ignition timing retard system will retard timing to the whole engine, even if one cylinder is the cause of a ping. It could be that the W2 head on some engines did not suffer this problem, i.e., they were correctly machined so the seat would sit right and accordingly are not habitually retarded, which might explain the mysterious observation of some factory engines performing better than others. Next time you pull your heads off, have a look. Easiest fix is to grind the **** out of that seat when doing valve job to make it flush with the chamber contour. I've seen the same artefact on other cylinders, with less consistently, but the front one on the W2 is the most consistent errata in my experience. There's no quick fifty cent fix for that, and any other mods for more power will be limited by the timing retard on engines having that seat lip exposed like that. Of course this means that $ 2000/pair heads from XYZ company having no hot edges from poorly fitted seats in their chambers will also perform better than stock. My guess is that the happiness many derive from expending such sums stems at least in part from that, which makes the head vendors' job of beating the stockers an exercise in childs' play.