Just out of curiosity, would a 98 ls1.....
02-09-2007, 11:58 PM
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Just out of curiosity, would a 98 ls1..... Since a 98 ls1 has a bigger cam & fuel injectors than the newer ls1's, theoretically, wouldn't it produce more power than the newer ls1's with the addition of an ls6 intake??? This question has been on my mind for a while....just wondering what u guys think about this question?
02-10-2007, 01:13 AM
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I see what ur saying....how much better do the newer heads flow, say the 241's, over the 806 or 853's??? The reason why I'm curious is because I've seen comparable power #'s between all of the 98-02's ls1's
02-10-2007, 08:58 AM
#5
If the heads suck so bad, why has my '98 trapped 110+ consistently with only a lid/catback/4.10's? I know my sig has the shorty headers in it, but I was pulling 110 without them. Don't believe everything you read on the internet. '98 heads are not that bad.
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02-10-2007, 12:17 PM
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Originally Posted by LS1Formulation
If the heads suck so bad, why has my '98 trapped 110+ consistently with only a lid/catback/4.10's? I know my sig has the shorty headers in it, but I was pulling 110 without them. Don't believe everything you read on the internet. '98 heads are not that bad.
02-10-2007, 02:28 PM
#9
the smaller cam didnt make any less power, its the same cam used in the 5.3's, actually it makes the same power but with less emissions, thats why the cars with smaller cam dont have EGR, and although the 806 and 853 heads dont suck there is no question the 241 heads are better even if only slightly....but like you were saying the number from 98-02 are all similar but dont let it be about dyno numbers when the important numbers are the ones produced at the track...
02-10-2007, 03:39 PM
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the cam and head diffrences are not noticable. i have a late 00 car with 241 heads and the bigger cam, with an LS6 intake on it it ran 13.3 @104, where as stock with LS1 intake it ran a 13.2 @104. if the cam made that big of a diffrence, when i had an LS6 intake on my car it should have absolutly raped an 01-02 car but it didnt.
while the cams are diffrent, its tiny diffrences and it doesent matter in the long run.
while the cams are diffrent, its tiny diffrences and it doesent matter in the long run.
02-10-2007, 04:35 PM
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98 Camaro's will be faster they already got the bigger cam, the ls6 would benefit better with the 98 Cam, and so be faster. And I dont think theres more than 5-8 hp difference between 98 and -02 heads.
02-10-2007, 04:54 PM
#12
Originally Posted by Candyredz28
98 Camaro's will be faster they already got the bigger cam, the ls6 would benefit better with the 98 Cam, and so be faster. And I dont think theres more than 5-8 hp difference between 98 and -02 heads.
What?
02-10-2007, 10:19 PM
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The valves are really the reason why the '98 heads don't flow that well. The SPM casting didn't make a huge difference in power. Yes, the ports were a little more accurate, but we're only talking a few, yes few, CFM inprovement from the ports alone.
Most of the gains from the '01/'02 cars are from the LS6 manifold and the improved exhaust manifolds / converters.
FWIW, my '98 LS1 with Mac midlength headers, cut-out, and a lid went 12.52 @ 110+.
Ben T.
Most of the gains from the '01/'02 cars are from the LS6 manifold and the improved exhaust manifolds / converters.
FWIW, my '98 LS1 with Mac midlength headers, cut-out, and a lid went 12.52 @ 110+.
Ben T.
02-10-2007, 10:41 PM
#15
The 98 heads are just slightly less flowing, exhaust manifolds are not as good, LS1 intake not as good, 98 ECM left alot to be desired...
However...
The 98's had the 28lb fuel injectors (so did 01-02), slightly larger camshaft(not much but enough to need an EGR), and the shaft on the throttle blade was different allowing it to open to WOT a little quicker than the later years...
I believe this evens them out enough to where most numbers and times are gonna be about the same.
However...
The 98's had the 28lb fuel injectors (so did 01-02), slightly larger camshaft(not much but enough to need an EGR), and the shaft on the throttle blade was different allowing it to open to WOT a little quicker than the later years...
I believe this evens them out enough to where most numbers and times are gonna be about the same.
02-10-2007, 10:45 PM
#16
Originally Posted by slick1851
From my understanding most 12.9 LS1s have been the 2002s?
The differences between the 241 heads and the others is so small, that the diff between one car to another is enough to keep from finding any type of consistancy.
The two cams in question, although one may be bigger as in the actual specs of it, perform nearly identically, and as someone already mentioned, it was changed to do away with the EGR that the 98-00 models had.
Injectors....alot of people talk how some years have larger/smaller injectors. Well the fact is if your not running lean, they arent holding you back. A car in stock or bolt-on configuration wont be hindered by the smaller 26 lbers, nor will the cars with the 28s have an advantage.
The LS6 intake.....yes, it's better no doubt, and should be the only real thing to worry about when comparing the 98-00s vs the 01-02s
02-11-2007, 06:07 PM
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Originally Posted by Studytime
The valves are really the reason why the '98 heads don't flow that well. The SPM casting didn't make a huge difference in power. Yes, the ports were a little more accurate, but we're only talking a few, yes few, CFM inprovement from the ports alone.
Most of the gains from the '01/'02 cars are from the LS6 manifold and the improved exhaust manifolds / converters.
FWIW, my '98 LS1 with Mac midlength headers, cut-out, and a lid went 12.52 @ 110+.
Ben T.
Most of the gains from the '01/'02 cars are from the LS6 manifold and the improved exhaust manifolds / converters.
FWIW, my '98 LS1 with Mac midlength headers, cut-out, and a lid went 12.52 @ 110+.
Ben T.
Hopefully mine will run the same
02-11-2007, 06:12 PM
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Originally Posted by BriancWS6
12.9 2002 M6 checking in here
The differences between the 241 heads and the others is so small, that the diff between one car to another is enough to keep from finding any type of consistancy.
The two cams in question, although one may be bigger as in the actual specs of it, perform nearly identically, and as someone already mentioned, it was changed to do away with the EGR that the 98-00 models had.
Injectors....alot of people talk how some years have larger/smaller injectors. Well the fact is if your not running lean, they arent holding you back. A car in stock or bolt-on configuration wont be hindered by the smaller 26 lbers, nor will the cars with the 28s have an advantage.
The LS6 intake.....yes, it's better no doubt, and should be the only real thing to worry about when comparing the 98-00s vs the 01-02s
The differences between the 241 heads and the others is so small, that the diff between one car to another is enough to keep from finding any type of consistancy.
The two cams in question, although one may be bigger as in the actual specs of it, perform nearly identically, and as someone already mentioned, it was changed to do away with the EGR that the 98-00 models had.
Injectors....alot of people talk how some years have larger/smaller injectors. Well the fact is if your not running lean, they arent holding you back. A car in stock or bolt-on configuration wont be hindered by the smaller 26 lbers, nor will the cars with the 28s have an advantage.
The LS6 intake.....yes, it's better no doubt, and should be the only real thing to worry about when comparing the 98-00s vs the 01-02s
02-11-2007, 06:59 PM
#19
Originally Posted by LS1Formulation
If the heads suck so bad, why has my '98 trapped 110+ consistently with only a lid/catback/4.10's? I know my sig has the shorty headers in it, but I was pulling 110 without them. Don't believe everything you read on the internet. '98 heads are not that bad.
02-11-2007, 07:38 PM
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Originally Posted by Asmodeus
The later heads are just simply better.
Ben T.
