disappointing track results.
disappointing track results. Hey guys.
I have an '02 SS Camaro I just picked up. I'll try to make this quick. I'm no stranger to fast cars, LS cars or whatever I have been doing it a very long time and had a lot of cars.
That out of the way, I'm scratching my head on this one. The car is a factory long block with fully built heads that are milled for 11.1 cr. It has an SLP cam not too crazy 234/576 and 228/571 ex 113 LSA but it has 1.75 rockers so possibly more lift. I'm not sure what the factory size rockers are. The car has long tubes, all the bolt ons and a built 4L60e with about a 4500 stall converter.
When I got the car it had/has a 200 shot on it and a tune for the NOS with little timing. I put about 28* of timing in it and it has zero KR and pulls pretty good with no problems. The fueling at WOT is around 13.5 which I feel is pretty lean but I've been corrected that it's normal for these cars. I'm used to around 11.9-12.5 as normal.
Ok, so I take it to the track. Launches decent and feels like a good run. Turns out. 12.22 at 112 with a shitty 1.8 60ft? WTF? It was not spinning at all. It has brand new M/T's on it.
The one thing I need to do is data log the car and see what the RPM range looks like with this converter and gear combo. The converter feels very sloppy so I'm concerned there's some slippage to blame this on. I had a 98 Z28 that had headers and a T-rex cam and it went 114 mph with a slipping clutch.
Am I crazy for thinking this should be an 11 second car? Any other things that catch anyone's attention? I work in a converter shop so I am going to cut this one open next week and see exactly where it is. I think the car needs a tighter converter and is giving up some mid range. I also think it could use some more fuel.
I have an '02 SS Camaro I just picked up. I'll try to make this quick. I'm no stranger to fast cars, LS cars or whatever I have been doing it a very long time and had a lot of cars.
That out of the way, I'm scratching my head on this one. The car is a factory long block with fully built heads that are milled for 11.1 cr. It has an SLP cam not too crazy 234/576 and 228/571 ex 113 LSA but it has 1.75 rockers so possibly more lift. I'm not sure what the factory size rockers are. The car has long tubes, all the bolt ons and a built 4L60e with about a 4500 stall converter.
When I got the car it had/has a 200 shot on it and a tune for the NOS with little timing. I put about 28* of timing in it and it has zero KR and pulls pretty good with no problems. The fueling at WOT is around 13.5 which I feel is pretty lean but I've been corrected that it's normal for these cars. I'm used to around 11.9-12.5 as normal.
Ok, so I take it to the track. Launches decent and feels like a good run. Turns out. 12.22 at 112 with a shitty 1.8 60ft? WTF? It was not spinning at all. It has brand new M/T's on it.
The one thing I need to do is data log the car and see what the RPM range looks like with this converter and gear combo. The converter feels very sloppy so I'm concerned there's some slippage to blame this on. I had a 98 Z28 that had headers and a T-rex cam and it went 114 mph with a slipping clutch.
Am I crazy for thinking this should be an 11 second car? Any other things that catch anyone's attention? I work in a converter shop so I am going to cut this one open next week and see exactly where it is. I think the car needs a tighter converter and is giving up some mid range. I also think it could use some more fuel.
13.5 sounds lean to me also. As soon as I figure out how to throw fuel into the VE table I'm going to give that a try.
I don't have a great data log from the track but I have a couple from the street. It shifts around 6800 and falls back to 5500 on the shift. I really do need a full 1-2-3 log though to verify that and see where she's crossing.
I don't have a great data log from the track but I have a couple from the street. It shifts around 6800 and falls back to 5500 on the shift. I really do need a full 1-2-3 log though to verify that and see where she's crossing.
The car also has an 8 grade plug in it for the nitrous which I'm not really sure how much performance would be gained with a normal N/A plug. That's worth mentioning though
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As already said, 13.5 is way too lean especially with higher than stock compression. really sureprised is not knocking with that much timing but the cam and plugs must be helping. gets some good logs, put the fueling mid to high 12s and see what it does
[QUOTE=pozesd99';19461572]He probably is making more...[/QUOTE
So say he is making 525 crank ,I don't think it is and that would be strong , so at most 470 wheel , its a f body and the weight is the killer of ET
So say he is making 525 crank ,I don't think it is and that would be strong , so at most 470 wheel , its a f body and the weight is the killer of ET
I don't think you need that much in a 4th gen , maybe in something old with a brick profile. I have 2 stock internal cars both with no weight reduction that have been 11.9 & 12.1 with far from full bolt ons. No way either car makes 380/470
I'm no expert but I got those numbers from a horse power calculato it said to trap 112 u needed 380 wheel but I put in at 3500 pounds so if the car is lighter then less power is oveslly needec
my a4 car had an additional floor jack and heavy toolbox in the trunk to try to help it hook up definitely 3500 pounds before I got in it so close to 3700 race weight and it trapped 112
[QUOTE=1500HP;19461797]My old cam only 1998 camaro with a 4k stall and a tire went 11.6 @ 116mph... Ls1 intake manifold, shitty pacesetters, and made 339rwhp with an unlocked converter. Stock suspension and weight car
Joined: Aug 2007
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From: Turnin' Wrenches Infractions: 005
My similar combo goes 10.9 on motor with quite a bit more mph so something is off. The mph tells me you're down on power. Being that the whole run seems slow I think you may have another issue other then just the wot fueling. Id go over the combo carefully and datalog as much as possible.