LS2 build Question
10-12-2006, 03:53 PM
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LS2 build Question I am considering building an LS2 for a 99 F-Body.
What do you think about these specs?
New LS2 block - $900
Honed w/ a torque plate - $100
New Rods (I-beam style)-Forged - $425
8.5:1 dome pistons & rings -Forged - $565
.525 x .525 cam & lifters - $250
Stock LS1 crank - have
Stock LS1 heads & intake - have
35# injectors - have
Vortech Supercharger 12-14 PSI - have
I was told to run Methanol injection.
Is it worth the added cost?
Is this a good setup for street and autocross?
What do you think about these specs?
New LS2 block - $900
Honed w/ a torque plate - $100
New Rods (I-beam style)-Forged - $425
8.5:1 dome pistons & rings -Forged - $565
.525 x .525 cam & lifters - $250
Stock LS1 crank - have
Stock LS1 heads & intake - have
35# injectors - have
Vortech Supercharger 12-14 PSI - have
I was told to run Methanol injection.
Is it worth the added cost?
Is this a good setup for street and autocross?
10-12-2006, 04:33 PM
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sell your motor and transmission complete
built LQ4/9 motor with forged pistons and L92 heads with a single plane or sheet metal intake. stock crank and stock connecting rods.
built LQ4/9 motor with forged pistons and L92 heads with a single plane or sheet metal intake. stock crank and stock connecting rods.
10-12-2006, 06:48 PM
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Originally Posted by Cop Car
sell your motor and transmission complete
built LQ4/9 motor with forged pistons and L92 heads with a single plane or sheet metal intake. stock crank and stock connecting rods.
built LQ4/9 motor with forged pistons and L92 heads with a single plane or sheet metal intake. stock crank and stock connecting rods.
I want to use the parts that I already have.
So does anyone else have an opinion on the question at hand?
Thx
Al
10-12-2006, 08:26 PM
#4
The stock heads and intake is going to be very restrictive with the 4" bore and the cam, you can put 2.02" & 1.575" valve in the stock seats and do some porting and clean up the bowls a little and atleast try to find you a used LS6 intake and a set of headers.
10-12-2006, 09:30 PM
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Originally Posted by Randy WS6
The stock heads and intake is going to be very restrictive with the 4" bore and the cam, you can put 2.02" & 1.575" valve in the stock seats and do some porting and clean up the bowls a little and atleast try to find you a used LS6 intake and a set of headers.
10-12-2006, 10:55 PM
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I would try for around 9-9.5:1. Superchargers like more static compression than turbos. Pick up some L-92 heads and intake, throw on some valve springs and go to town.
Nate
Nate
10-13-2006, 09:44 AM
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Originally Posted by Nate_Taufer
I would try for around 9-9.5:1. Superchargers like more static compression than turbos. Pick up some L-92 heads and intake, throw on some valve springs and go to town.
Nate
Nate
I was told to not go over 9:1 and run as much boost as I want.
I plan to run approx 13 PSi for now.
Al
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10-14-2006, 11:58 AM
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Originally Posted by Bandit28
450 475 crank hp if your lucky with stock heads
do you know of a chart or ref that I can look up that spects and see approx what I'll get from this?
10-14-2006, 01:10 PM
#11
i hvae no idea but im going to say no but stock 5.7 head and 6.0 heads have basicly "no *****" if you know what i mean, so basicly get them ported and some big valves. As well as a good healthy cam, you make alot of your power in the heads and valve train.... goodluck
10-15-2006, 12:54 PM
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Originally Posted by Bandit28
i hvae no idea but im going to say no but stock 5.7 head and 6.0 heads have basicly "no *****" if you know what i mean, so basicly get them ported and some big valves. As well as a good healthy cam, you make alot of your power in the heads and valve train.... goodluck
Thanks for the info
Al
10-17-2006, 11:29 AM
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I seen a member here , LS6son running a 408 with stock 241's 244/248 .612''/.615'' 114lsa and an ls6 intake making 469 rwhp and 467 rwtq through a 9'' . Thought that was pretty good myself.
heres the link https://ls1tech.com/forums/dynamometer-results-comparisons/588600-how-much-do-i-stand-gain.html
heres the link https://ls1tech.com/forums/dynamometer-results-comparisons/588600-how-much-do-i-stand-gain.html
Last edited by cws T/A; 10-17-2006 at 11:43 AM.
10-18-2006, 01:39 PM
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there is a dyno in my thread you might be interested in looking at
https://ls1tech.com/forums/dynamometer-results-comparisons/586000-403ci-reusing-stock-manifolds.html
also blower + auto cross, there is no point to it, you will never hit redline in an auto-x where peak power is made. if you do your asking for tail whip lash action with 13 psi. all motor and gears for auto-x. blower is a waste IMO. i ran in SCCA for 2 years, 1 full season with a blown S2000 which worked out great, gave that car the extra power it needed. in a f-body, it needs suspension in order to run auto-x properly, not gobs of power.
take the LS2 to a 4.030 bore + 4.1" crank and make a 418 ci motor out of it and you will be in the 550/500 territory on motor alone with all the right parts. power under the curve will kill a blown 346, i think even with pushing 12-14psi
sell your old motor, sell the blower to pay for a LS2 418ci.
https://ls1tech.com/forums/dynamometer-results-comparisons/586000-403ci-reusing-stock-manifolds.html
also blower + auto cross, there is no point to it, you will never hit redline in an auto-x where peak power is made. if you do your asking for tail whip lash action with 13 psi. all motor and gears for auto-x. blower is a waste IMO. i ran in SCCA for 2 years, 1 full season with a blown S2000 which worked out great, gave that car the extra power it needed. in a f-body, it needs suspension in order to run auto-x properly, not gobs of power.
take the LS2 to a 4.030 bore + 4.1" crank and make a 418 ci motor out of it and you will be in the 550/500 territory on motor alone with all the right parts. power under the curve will kill a blown 346, i think even with pushing 12-14psi
sell your old motor, sell the blower to pay for a LS2 418ci.
10-18-2006, 06:07 PM
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Originally Posted by Blown04Z06
there is a dyno in my thread you might be interested in looking at
https://ls1tech.com/forums/showthread.php?t=586000
also blower + auto cross, there is no point to it, you will never hit redline in an auto-x where peak power is made. if you do your asking for tail whip lash action with 13 psi. all motor and gears for auto-x. blower is a waste IMO. i ran in SCCA for 2 years, 1 full season with a blown S2000 which worked out great, gave that car the extra power it needed. in a f-body, it needs suspension in order to run auto-x properly, not gobs of power.
take the LS2 to a 4.030 bore + 4.1" crank and make a 418 ci motor out of it and you will be in the 550/500 territory on motor alone with all the right parts. power under the curve will kill a blown 346, i think even with pushing 12-14psi
sell your old motor, sell the blower to pay for a LS2 418ci.
https://ls1tech.com/forums/showthread.php?t=586000
also blower + auto cross, there is no point to it, you will never hit redline in an auto-x where peak power is made. if you do your asking for tail whip lash action with 13 psi. all motor and gears for auto-x. blower is a waste IMO. i ran in SCCA for 2 years, 1 full season with a blown S2000 which worked out great, gave that car the extra power it needed. in a f-body, it needs suspension in order to run auto-x properly, not gobs of power.
take the LS2 to a 4.030 bore + 4.1" crank and make a 418 ci motor out of it and you will be in the 550/500 territory on motor alone with all the right parts. power under the curve will kill a blown 346, i think even with pushing 12-14psi
sell your old motor, sell the blower to pay for a LS2 418ci.
I still would like to know what size valves are in these heads?
Thanks
Al
10-18-2006, 10:16 PM
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I dont think you can bore a sleeved { aluminum LS2 }engine only Iron . You will have to resleeve to add cubes .
If your not going to stroke the LS2 you wanna build its not worth it , your more at risk of detonation with the larger bore.
Them injectors will be 2 small at a 14psi power level
Methanol is good but , you should run an FMIC
If your not going to stroke the LS2 you wanna build its not worth it , your more at risk of detonation with the larger bore.
Them injectors will be 2 small at a 14psi power level
Methanol is good but , you should run an FMIC
