lq9 vs ls1 in 99 trans am
10-29-2009, 08:15 PM
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lq9 vs ls1 in 99 trans am ok guys here is my ? i got 2 options of engines 3 head options what would u guys choose ? putting in 99 trans am a4 4.10 gear street car daily driver
i got 2 option short blocks?
03 escalade lq9 60k miles
98 ls1 70k miles
heads have 3 choices?
i have stock 5.3 or stock ls1 or stock lq9
i am going to be running A MS3 cam
what combo would u choose?
i got 2 option short blocks?
03 escalade lq9 60k miles
98 ls1 70k miles
heads have 3 choices?
i have stock 5.3 or stock ls1 or stock lq9
i am going to be running A MS3 cam
what combo would u choose?
Last edited by n20z28; 10-29-2009 at 08:21 PM.
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10-30-2009, 06:42 AM
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ls1+317's milled to 64cc+ 228/23x cam
1. keep the weight off the nose. the lq9 will add almost 90 lbs to the nose of your car and will negate any power gains, and not help traction at all
2. the lq9 317 casting heads are basically a large chamber ls6 head. bigger ports. much better head in stock form than the other two. just mill it to achieve disired CR.
3. the smaller cam in a full wieght DD will make for a better driver and more power under the curve, and will require less stall to be effective.
1. keep the weight off the nose. the lq9 will add almost 90 lbs to the nose of your car and will negate any power gains, and not help traction at all
2. the lq9 317 casting heads are basically a large chamber ls6 head. bigger ports. much better head in stock form than the other two. just mill it to achieve disired CR.
3. the smaller cam in a full wieght DD will make for a better driver and more power under the curve, and will require less stall to be effective.
11-01-2009, 03:16 PM
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nice daily driven street car is my intensions... to make the most power and et i can while its out for low buck working with what i have laying around
11-01-2009, 07:22 PM
#12
I wouldn't do anything with a 98 shortblock...there's nothing BAD with them...but there's nothing good with them either.
I'd do the LQ9, leave the stock LQ9 heads on it, and do something to lighten the weight back off the nose of the car (or don't worry about it since it's a street car, 90 lbs isn't a big deal...I'd probably pick a different cam though.
I'd do the LQ9, leave the stock LQ9 heads on it, and do something to lighten the weight back off the nose of the car (or don't worry about it since it's a street car, 90 lbs isn't a big deal...I'd probably pick a different cam though.
11-01-2009, 10:45 PM
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I wouldn't do anything with a 98 shortblock...there's nothing BAD with them...but there's nothing good with them either.
I'd do the LQ9, leave the stock LQ9 heads on it, and do something to lighten the weight back off the nose of the car (or don't worry about it since it's a street car, 90 lbs isn't a big deal...I'd probably pick a different cam though.
I'd do the LQ9, leave the stock LQ9 heads on it, and do something to lighten the weight back off the nose of the car (or don't worry about it since it's a street car, 90 lbs isn't a big deal...I'd probably pick a different cam though.
no matter what he takes off the nose, he always could have done that with the lighter block also and always could have been lighter. 90lbs isnt a big deal to you maybe, that dont mean its not a significant factor. handling and traction will not be optimal in stock form without suspension mods to set it up for the extra weight.
im not just talking out my *** here, i have a 6L in my car, and if i had it to do over again. i would not put the extra wieght on the nose unless i was A. going forced induction, or B. building a strocker 408 to have enough power to offset the extra wieght. still yet an ls2 block would be better for the stroker, but im a cheap *** so i probably wouldnt do it. lol
i have a baby cam in mine 224/228 .581 .588 114LSA and put down 400rwhp/400rwtq. stock milled 317 heads and ls6 intake.
that 228/23x cam you mentioned will make a very nice driver with gobs of tq and plenty of power under the curve
11-02-2009, 12:38 AM
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5.3 heads on a 6.0 is a stupid idea.
Do the LQ9 (factory 10-1 CR) and if anything run 243 heads unless u've got the money for aftermarket high dollar heads. If not, mill the 243s a get a thinner gasket and you can easily achieve 11 CR if so desired. May want to look in to fly cutting the pistons if you will be milling heads and running the MS3 for sure.
Do the LQ9 (factory 10-1 CR) and if anything run 243 heads unless u've got the money for aftermarket high dollar heads. If not, mill the 243s a get a thinner gasket and you can easily achieve 11 CR if so desired. May want to look in to fly cutting the pistons if you will be milling heads and running the MS3 for sure.
11-02-2009, 09:02 AM
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i dont know i am confused why they say that 6.0 liter work good with 5.3 heads cuz will bump compression and on ls1 to putting a 706 or 862 heads work well or they dont i was going with a steup almost the same but with and ls1 with 228,232 cam
11-02-2009, 11:30 AM
#19
You, and A LOT of other people replying to this thread, are not understanding that the OP is talking about STOCK 5.3L head. There is NO reason to put a stock 5.3L head on an engine that has a 241/243/317 head already in place. The stock head does not flow as well as the others, and the valves are smaller. When you hear of people talking about 5.3L head swaps, they are talking about the heads that have been ported by a vendor and have had the valves replaced. If I were the OP, I wouldn't even consider the stock 5.3's as an option.
11-02-2009, 12:18 PM
#20
You, and A LOT of other people replying to this thread, are not understanding that the OP is talking about STOCK 5.3L head. There is NO reason to put a stock 5.3L head on an engine that has a 241/243/317 head already in place. The stock head does not flow as well as the others, and the valves are smaller. When you hear of people talking about 5.3L head swaps, they are talking about the heads that have been ported by a vendor and have had the valves replaced. If I were the OP, I wouldn't even consider the stock 5.3's as an option.