stock LQ4 mod ideas
07-15-2012, 10:03 PM
#11
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My truck put down 403/391 with a 230/236 cam and stock 317s.
https://www.performancetrucks.net/fo...esults-472581/
https://www.performancetrucks.net/fo...esults-472581/
07-16-2012, 06:00 AM
#12
Yeah, but that should give you some insight on what size of cam was needed. You might not get quite get the 400 rwhp with the 317s and a bigger sized cam in a Lq4. But, it will make good power with the mods you have now.
For a street truck, I'd run the 3200. I run a smaller sized stall converter b/c its what came with the transmission I bought. It's not the best choice to run at the track. But it works good on the street.
If you want the fastest 1/4 mi ET possible with that setup; I'd run a 3600.
For a street truck, I'd run the 3200. I run a smaller sized stall converter b/c its what came with the transmission I bought. It's not the best choice to run at the track. But it works good on the street.
If you want the fastest 1/4 mi ET possible with that setup; I'd run a 3600.
07-17-2012, 05:18 PM
#14
400 to the wheels in a cam only LQ4 will be tough but its hardly impossible. Things like the intake swap will help... but honestly you can get the 243's for the same price... so why not go that route?
I say you go with a cam similar to what has been mentioned and just see where you end up on the HP spectrum. If you need a few more goodies to hit the majic 400 number you know where to turn.
I say you go with a cam similar to what has been mentioned and just see where you end up on the HP spectrum. If you need a few more goodies to hit the majic 400 number you know where to turn.
07-30-2012, 08:52 PM
#15
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i picked up some complete 243's for 300 dollars the other day, im also considering having an "El toro" cam cut.. 230/230 .615/.592 111+2 LSA
how much would i have to mill off the 243's to get 10.5:1?
how much would i have to mill off the 243's to get 10.5:1?
08-04-2012, 12:24 AM
#19
Engine Size and Compression Calculator
I just used rough numbers. This what I plugged in..
bore size: 4"
stroke length: 3.622
cylinders: 8
combustion chamber size: 64
piston dome: -4.5
gasket thickness: .05
Came out to 10.46.
A lq4 is ~.5 point lower on static compression than a lq9. A lq9 is basically a ls2 with 317s. LS2 has 11.1 static comp. Lq9 has ~10.5 scr. 243s are good for a half compression point bump on a lq9. Apply that to a lq4.
I just used rough numbers. This what I plugged in..
bore size: 4"
stroke length: 3.622
cylinders: 8
combustion chamber size: 64
piston dome: -4.5
gasket thickness: .05
Came out to 10.46.
A lq4 is ~.5 point lower on static compression than a lq9. A lq9 is basically a ls2 with 317s. LS2 has 11.1 static comp. Lq9 has ~10.5 scr. 243s are good for a half compression point bump on a lq9. Apply that to a lq4.
08-04-2012, 10:01 AM
#20
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Engine Size and Compression Calculator
I just used rough numbers. This what I plugged in..
bore size: 4"
stroke length: 3.622
cylinders: 8
combustion chamber size: 64
piston dome: -4.5
gasket thickness: .05
Came out to 10.46.
A lq4 is ~.5 point lower on static compression than a lq9. A lq9 is basically a ls2 with 317s. LS2 has 11.1 static comp. Lq9 has ~10.5 scr. 243s are good for a half compression point bump on a lq9. Apply that to a lq4.
I just used rough numbers. This what I plugged in..
bore size: 4"
stroke length: 3.622
cylinders: 8
combustion chamber size: 64
piston dome: -4.5
gasket thickness: .05
Came out to 10.46.
A lq4 is ~.5 point lower on static compression than a lq9. A lq9 is basically a ls2 with 317s. LS2 has 11.1 static comp. Lq9 has ~10.5 scr. 243s are good for a half compression point bump on a lq9. Apply that to a lq4.