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Old 12-17-2006, 01:35 PM
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down low. Seems like I can't get the rpms up fast enough. Is this a tuning issue? How much will gears and a pulley help? The throttle response down low is just *** slow and it makes me angry. I see the mustangs just flick a rev and I'm jealous. Any suggestions?
Old 12-17-2006, 01:39 PM
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more important....
-what mods are on the car now?
-any dyno numbers?
-how many miles on the car?
-is it well maintained?
Old 12-17-2006, 05:28 PM
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Lid
Catback
EGR mod
FRA mod
very well maintained at 76k
always 93 octane
Royal Purple
no dyno #s

Last edited by SSTowerman; 12-17-2006 at 05:30 PM. Reason: More info
Old 12-17-2006, 07:30 PM
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has it ever been to the track or is this just a sotp feeling?
Old 12-17-2006, 10:06 PM
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Never been to the track. I dunno what sotp means. I just think that it should rev up quicker than it does since it's a small block . The motor feels slow and lethargic getting up the rpms.
Old 12-17-2006, 10:13 PM
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ls1 power curve really doesn;t wak up on a stock engine till around 3500rpm or so. soft or just doens;t pull as hard ?
Old 12-17-2006, 10:23 PM
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I understand where the powerband is. However, I feel the motor should make rpms quicker. Am I mistaken?
Old 12-17-2006, 10:35 PM
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sotp=seat of the pants
Old 12-18-2006, 07:54 AM
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So, you're wondering why the rpms don't come up quickly on a nearly stock car? The lid/catback is a good step in the right direction for bolt-ons. The '99 M6 I had didn't do half bad with just those mods. But, the best I could run at the track was 105mph in 13.4 seconds on a 2.0 second 60-foot.

In my opinion (and don't take any offense to this because we're not all John Force), it's driver error assuming all is mechanically sound. If the rpms aren't coming up fast enough, you're either in the wrong gear or your bogging it off of the line. Even near-stock LS1's shouldn't feel like you're waiting for v-tech to kick in. If you're used to driving an LT1, it is a little different having your torque curve shifted up a quite a few rpms. But, you still haven't lost any ft/lbs. If anything, you've gained a few.

Just curious, but why is this in the PCM section??
Old 12-18-2006, 09:09 AM
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because apparently he thinks its a tuning issue
Old 12-18-2006, 09:15 AM
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Originally Posted by foff667
because apparently he thinks its a tuning issue
Well, I'd say no way with only a lid/catback. He might be running slightly rich with the factory tune...but, that's about it.
Old 12-18-2006, 09:50 AM
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My 99 SS vert kicks A$$ with just a lid, filter, and ported TB. With the tune on, it's even more so pimp. Seriously, mine just gets up and goes...scares the wife sometimes.

Maybe you're losing power to the tires...rear-end making any noise?

Damn, even in 2nd gear at 10 mph, I'm upto 60 in like 6 seconds, + or - of course.
Old 12-18-2006, 10:15 AM
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I would just suggest bringing that thing to a dyno and posting up the chart for comparision to other stock dynos and you'll see if it is lugging for some reason. lots of info you can use there and doesn't cost a whole lot i think to just pull down numbers. It is definitely a motor that likes to turn RPMS to make torque!
Old 12-18-2006, 06:28 PM
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I just think that it should rev up quicker than it does since it's a small block . The motor feels slow and lethargic getting up the rpms.
revs slow compared to what? a 4cyl.?

how long have you been driving this car? and what was your last car?

im still unsure if you mean that it is revving slow all of a sudden or you just got the car and these are your first impressions.....

and being a small block has nothing to do with how it revs..... you are throwing around 8 cylinders... not 4.

i have a fealing that you are bogging the gears.....

more info needed.
Old 12-19-2006, 01:52 PM
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I have a simple theory. Check to see if the TB cable is hooked up right. It's possible that there is slack in the line and when you floor it, you're not actually "flooring it." Try figuring out if it's something simple like that before you start messing with other items.
Old 12-19-2006, 02:34 PM
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Originally Posted by M6HuggerSS
revs slow compared to what? a 4cyl.?

how long have you been driving this car? and what was your last car?

im still unsure if you mean that it is revving slow all of a sudden or you just got the car and these are your first impressions.....

and being a small block has nothing to do with how it revs..... you are throwing around 8 cylinders... not 4.

i have a fealing that you are bogging the gears.....

more info needed.
It's my second SS. I know what to expect. With the car in Neutral, press the gas a little and it seems that the tacometer doesn't jump like it should. It just builds rpms too slow imo. Throttle repsonse is slow, and making rpms is slow imo. I know how to drive the damn thing. I don't gear bog it. I just wonder if the motor can respond better to a quick pedal push in neutral. Or when rev matching to down shift. That seems to take longer than it should too. I thought this might be a tuning issue.
Old 12-19-2006, 03:32 PM
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Originally Posted by pdanrichey
I have a simple theory. Check to see if the TB cable is hooked up right. It's possible that there is slack in the line and when you floor it, you're not actually "flooring it." Try figuring out if it's something simple like that before you start messing with other items.
he is right, I had the throttle cable bracket on my f150 back out because it was supposed to be thread locked, when it got some play after backing out some, it felt like I was pushing the throttle to the floor, and I was but the whole bracket was moving! So check the simple stuff first, and I hope it is something simple and cheap to fix for you!
Old 12-19-2006, 04:12 PM
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could also be your TPS. maybe a plugged fuel filter, any codes?
Old 12-20-2006, 01:36 AM
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Ok, I'll be checking some more simple stuff then.




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