This is a discussion on stall? within the Internal Engine forums, part of the LSx Technical Help Section category; hey guys, im gonna have about $1500 to put on my car, it currently has cam, headers, ory, no cats/mufflers, ...
02-03-2009, 05:11 PM #1
hey guys, im gonna have about $1500 to put on my car, it currently has cam, headers, ory, no cats/mufflers, slp intake, and thats all as far as i know i bought the car that way, the only thing ive done to it is change the oil every 3k mi, with mobil 1, k&n oil filter, i put ngk spark plugs, and msd wires, it has 2.73s, dont want to put gears cuz i like the mileage, and high rolls, i have my mind set on stall, dyno tune, and maybe nitrous, now my question is, does the cam it has affect what kind of stall i should get, is there any way i can find out what kind of cam it has, and specs on it, is there something i should consider before these mods, my best is 13.1@115, but on the street i beat flat 12s cars. thanks for the help.
02-03-2009, 05:42 PM #2
Well, if you have stock stall.... and the car is running good.... It cant be that big of a cam really. Only way to know is if you get the cam card from the guy really. 3.73's wont really reduce your MPG all that much. Really need to find out what cam is in that motor, but if your running a 13.1... it cant be too large, also on stock stall.
02-03-2009, 08:29 PM #3
well it sounds like its big, it has a very big lope, it needs a tune bad, like i said, it sucks at the track, but on the street its pretty fast, ive taken a few cars in the low 12s, and and evo running flat 12s, i beat a 6.0 camaro with mild cam, headers, exhaust, my friend has a ss that dynoed 36xhp, then got a nitrous tune, which he said would drop his hp, with the nitrous tune he ran a 12.6, not spraying, before his nitrous tune i would beat him by like 3 cars and pulling. I was also told my mph is high for 13s. they would tell me that i needed traction, but my car doesnt spin at all, even if i tried.
02-03-2009, 11:19 PM #4
you can get a choppy idle/lope even with a small cam if its got a smaller lsa than stock, like a 112lsa instead of a stock 116lsa.
stock motor with a 3,000 rpm stall can drop a 1/2second in the 1/4mile. I'm running a relativly small cam (220/224 .570/.580 lift on a 112lsa) and wouldn't think of driving it with the stock stall.
if you can't findout any info on the cam from the previous owner, and since it is drivable with the stock stall, I'd go with a 3,000-3,500 rpm stall
02-04-2009, 04:23 AM #5
What's up? Haven't seen ya post in a while
Just a little info.... a stall's gonna hurt your milage as much as a gear
but yeah your car def. needs a converter Like Mark said w/your cam
3400-3600 would great and still DD
02-04-2009, 08:38 AM #6
Your trap speed tells me it's making some HP which leads me to believe someone put a decent little cam in there. Especially since you are doing that with only a 2.73 gear.
Your ET is slow for the trap speed because the combination is mismatched at the moment. That MPH is good for an easy 11.70 or better with the right converter and gear.
That cam needs a converter in the worst way, and generally in an auto a converter is nearly a necessity when a cam with alot of overlap is used. That thing must want to drive right through the brakes.
From there it's going to want some gear as well. I know you don't like the idea but I would at the very least look for a 3.23 or 3.42 geared complete rearend and just swap the whole rearend in there. Thats the easiest and cheapest way to do it if you want to keep it near stock gas mileage levels. And you always have the option of switching it back without much hassle if you desire. Putting a converter in isn't going to help the mileage anyway so you may as well do the gears too.
Keep in mind the converter you choose will feel and drive around a little looser if you keep those 2.73 gears because the motor has to work a little harder to push the car around, causing you to drive into the converter a bit more. Actually a little more rear gear could help the mileage a bit depending on how you drive it.
My opinion without knowing the camshaft specs I would shoot for a converter in the 3500 range but it would be best to call a converter manufacture and give the weight of the car and any other specs you can answer as well as what the car is currently doing. They can steer you in the right direction.
02-04-2009, 08:43 AM #7
02-04-2009, 01:16 PM #8
02-04-2009, 01:22 PM #9
I only drive the car on the weekends, and some weeknights, i drive maybe 100mi a week, good for a full tank, i think because it needs a tune BAD, on the highway though i get 25+mpg, but if the stall will affect the mileage then ill probably consider gears also, and its true about the brakes, i took it to a mechanic and he said it was normal because the cam, something about the compression that it took away from the brake booster, something like that, thanks for the help guys alot of good info.
02-04-2009, 04:39 PM #10
I generally have to throw alot of initial advance in it ,,,quite a bit of vacuum advance on top of it,,,,and fatten up the idle circuits to make it happy.
02-04-2009, 05:42 PM #11
- Join Date
- Apr 2006
- NW Ohio
2004 Black Escalade EXT
- 1999 Hugger Orange Z28
Like stated before, the stall will hurt your mpg.
My car was basically stock and I was getting 22-25mpg all day everyday no matter how hard I drove it. I put the stall, headers, ORY and cutout in and my mileage went down to 17-18 mpg. I have even gotten as bad as 15mpg on a tank.
I'm gonna put 3.42's in this spring and see what it does to the mileage then.99 Hugger Orange Z28 A4 3.42's
Mod's SLP Cold Air Intake, Pacesetter LT's, ORY, Electric Cut-out, Magnaflow Exhaust, Vig. 3200 Stall, Spohn LCA's, UMI SFC's, 17x9.5 and 18x10.5 Black Z06 Motorsports
02-05-2009, 04:18 AM #12
yeah the converter will lock up but with your gear it will flash a little
more to get in the right rpm range to lock up.
actually it would prob. drive more like stock w/ 3.42 0r 3.73 behind a 3600 stall
02-05-2009, 06:57 AM #13
- Join Date
- Dec 2002
- n/w chicago
- 2000 nhra edition formula
Im thinking the car is stalled already and the gentleman just doesnt know it.2000 nhra edition formula
a few bolt ons, 379 rwhp
02-05-2009, 07:15 AM #14
I went from 22 mpg around town to 20 mpg driving sensibly.
02-05-2009, 07:17 AM #15
02-05-2009, 12:24 PM #16
NO I've seen this car at a meet and sounds realy nasty but idle's high in park and drop in gear.... boom almost dies and try's to push through brakes! soo def. no stall
Oh on the flip ... from 50mph roll the thing a BEAST!!
02-05-2009, 03:41 PM #17
thanks for all the input, i think im gonna hold off on the nitrous then, for now, and go with gears, stall, and tune, i think 3.73s, how can i find out who was/were the previous owners?
02-05-2009, 03:51 PM #18
02-05-2009, 04:24 PM #19
02-06-2009, 05:16 AM #20
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