MadMarv
Jul 24th, 04, 10:28 PM
If New England Dragway has its TNT on saturday (meaning no bad weather), its gonna be my last run this summer. Going to be moving in a couple weeks so I won't have time for the car or much else really.
The biggest change has been the torque converter. I honestly can't tell if it has made a difference.
I *do* know I can hold the car in place with my zero-assist "power brakes" at 3000rpm whereas with the old converter, it would push through the brakes at 1800rpm, but was still slipping at 9.7ish % at 117mph.
I installed a heated ARM1 o2 sensor, and I get pig-rich readings at all times except when the oil and water are hot, and the car is in park, at that time, it registers around 14:1 AF. Otherwise its showing what the colors on the meter indicate 11:1 or worse (at startup), and 12.5:1 or so (at 40mph cruise).
Just did a nice oil change, kept with the mobil 1, took a look at a few of the valves while the engine is hot and not a one has moved a bit, but I figure the Crower SS rockers and girdle help out here.
Since its a TNT all day saturday, I will try doing a run with my kickdown connected again-- every time I run with the kickdown connected, I pickup .5mph.. but if it downshifts because i can't pin it off the line, it gets stuck in either neutral or some gear and doesn't work like it should.
I was hoping to address the richness and kickdown for the last track date, but don't think it gonna happen.. just the front QA1's will go to softest and the 26*10.5 ET streets will go to 18lbs cold, although I may try 20.
One thing though.. about these tires.. I back into the water box, do a little spin, move up, then spin it a little more. My best hook was with a pretty evil (for me anyway) burnout that started in the water box, and then I just eased off the brakes and burned the tires up to almost the staging beams. took a while for the smoke to clear.
Is this the way to go? or do I not really need to heat the tires like that?
The problem is my other runs were hurt by some guy dropping an oil filter and spewing mobil one all over the track, I have a decent vid of me sending the rear of the car into the other lane at near the 1000' mark because of oil left on the track after a 1.5hr cleanup. (guy didn't stop-- he drove the whole run, even though there was more smoke than I'd ever seen).
Also-- one last one, since I'm just chatting with myself basically..
I posted this earlier but no one touched it. If you get a converter that slips X percent less at a given MPH, is there a way to equate that into performance (MPH or ET) gained? Like, if I pick 3% less slip at hydrolock RPM, is there some sort of equation I can use to guess what I _might get_? For all I know, the new converter could be worse than the old one.
will have to wait and see.
Also-- if My car does not shift or raise during a footbrake until a much higher RPM than before, am I better off footbraking to just below where the suspenion starts to buckle, or just do my 1500rpm and get on it as fast as possible w/o smoking the tires routine?
Sorry..
Its just I have one potluck chance at a decent race day coming up. Car is blue w/ white stripes, towed by a red sierra, young driver and my pops as photographer, if anyone is gonna be up there to look at the car or berate me for my political views..
Matt
The biggest change has been the torque converter. I honestly can't tell if it has made a difference.
I *do* know I can hold the car in place with my zero-assist "power brakes" at 3000rpm whereas with the old converter, it would push through the brakes at 1800rpm, but was still slipping at 9.7ish % at 117mph.
I installed a heated ARM1 o2 sensor, and I get pig-rich readings at all times except when the oil and water are hot, and the car is in park, at that time, it registers around 14:1 AF. Otherwise its showing what the colors on the meter indicate 11:1 or worse (at startup), and 12.5:1 or so (at 40mph cruise).
Just did a nice oil change, kept with the mobil 1, took a look at a few of the valves while the engine is hot and not a one has moved a bit, but I figure the Crower SS rockers and girdle help out here.
Since its a TNT all day saturday, I will try doing a run with my kickdown connected again-- every time I run with the kickdown connected, I pickup .5mph.. but if it downshifts because i can't pin it off the line, it gets stuck in either neutral or some gear and doesn't work like it should.
I was hoping to address the richness and kickdown for the last track date, but don't think it gonna happen.. just the front QA1's will go to softest and the 26*10.5 ET streets will go to 18lbs cold, although I may try 20.
One thing though.. about these tires.. I back into the water box, do a little spin, move up, then spin it a little more. My best hook was with a pretty evil (for me anyway) burnout that started in the water box, and then I just eased off the brakes and burned the tires up to almost the staging beams. took a while for the smoke to clear.
Is this the way to go? or do I not really need to heat the tires like that?
The problem is my other runs were hurt by some guy dropping an oil filter and spewing mobil one all over the track, I have a decent vid of me sending the rear of the car into the other lane at near the 1000' mark because of oil left on the track after a 1.5hr cleanup. (guy didn't stop-- he drove the whole run, even though there was more smoke than I'd ever seen).
Also-- one last one, since I'm just chatting with myself basically..
I posted this earlier but no one touched it. If you get a converter that slips X percent less at a given MPH, is there a way to equate that into performance (MPH or ET) gained? Like, if I pick 3% less slip at hydrolock RPM, is there some sort of equation I can use to guess what I _might get_? For all I know, the new converter could be worse than the old one.
will have to wait and see.
Also-- if My car does not shift or raise during a footbrake until a much higher RPM than before, am I better off footbraking to just below where the suspenion starts to buckle, or just do my 1500rpm and get on it as fast as possible w/o smoking the tires routine?
Sorry..
Its just I have one potluck chance at a decent race day coming up. Car is blue w/ white stripes, towed by a red sierra, young driver and my pops as photographer, if anyone is gonna be up there to look at the car or berate me for my political views..
Matt