L92 Swap On A 6.0. Who Has Done It?

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11-02-2009, 02:39 PM
Wtfan18

very interesting thread, im wanting to do this with my 04 LQ9 i just bought as well.
11-02-2009, 03:10 PM
MEANGENE75

bluel92, any advice or suggestions? how bout any install pics? thanks...gene
11-02-2009, 08:09 PM
dirt track racer 81

Quote:

Originally Posted by skeet

i had the 706 patriot stage 2 heads which put the cr over 12. when patrick g spected my cam he mentioned the cr being 11:1 with the ported l92 ( ls3 ) heads, 11:8 isnt bad if you ask me, i was still able to run 93 on the 12:5 cr, this info came from richard if not mistaken i talked to him before i put the 5.3 heads on.

what gasket size did you calculate that at?

with my heads now im at 11.8. did some reading on tech last night, guys were milling them .030, even spdc had them this way iirc. Milling .030 would give me a 65cc chamber,with a -4cc valve reliefs, 4.060 bore .040 gasket heard of some going .030, 4.030 cylinder bore, gives me a 10.98:1 comp ratio. if i use .030 gaskets it gives me 11.27
11-02-2009, 09:31 PM
skeet

Quote:

Originally Posted by dirt track racer 81

with my heads now im at 11.8. did some reading on tech last night, guys were milling them .030, even spdc had them this way iirc. Milling .030 would give me a 65cc chamber,with a -4cc valve reliefs, 4.060 bore .040 gasket heard of some going .030, 4.030 cylinder bore, gives me a 10.98:1 comp ratio. if i use .030 gaskets it gives me 11.27

good info yeah i went on tech myself and did some searching lol... those numbers are for your 370 though correct?

gonna be a nice setup foresure ;)
11-02-2009, 09:44 PM
dirt track racer 81

Quote:

Originally Posted by skeet

good info yeah i went on tech myself and did some searching lol... those numbers are for your 370 though correct?

gonna be a nice setup foresure ;)

yea, that was using that calculator i posted. on whether how accurate it is i dont know..I just dont want to part ways with my polished vic jr intake.
11-02-2009, 10:36 PM
skeet

Quote:

Originally Posted by dirt track racer 81

yea, that was using that calculator i posted. on whether how accurate it is i dont know..I just dont want to part ways with my polished vic jr intake.

all honesty i wouldnt, from what i gathered the vic jr likes bigger bore motors, i ran one on a stock bore 364 CI, i felt it robbed alot of lowend, i personally think with a bigger bore there wouldnt be any worries. plus you'll have a great advantage if you decide to go nitrous, direct port ;) youre build seems like it would be very well built to turn 7k-7500 rpms and with the vic jr would work well for a high rpm motor, if youre plans are to turn it up that high ;)

i may have missed it but your 370 is being built for NA ?
11-02-2009, 10:57 PM
dirt track racer 81

Quote:

Originally Posted by skeet

all honesty i wouldnt, from what i gathered the vic jr likes bigger bore motors, i ran one on a stock bore 364 CI, i felt it robbed alot of lowend, i personally think with a bigger bore there wouldnt be any worries. plus you'll have a great advantage if you decide to go nitrous, direct port ;) youre build seems like it would be very well built to turn 7k-7500 rpms and with the vic jr would work well for a high rpm motor, if youre plans are to turn it up that high ;)

i may have missed it but your 370 is being built for NA ?

I have a fast 4150 1375 cfm plate. Im going to running a single stage big shot plate but running a dual stage 250 shot, maybe some more down the road. on the dyno i was still making power at 7k and yet to peak. Before i had ls1 heads and pro prod intake and 230/226 cam. I actually gained 20lbs tq with the bigger cam and vic jr. The throttle response is very snappy with the fast plate and accelerates very nicely. Only thing I got to run was gt500 that I walked away from. Once I get a trans back in it, Ill slap it back on the dyno and run it up to 7500-7600 and see if and how fast power drops off
11-03-2009, 09:46 AM
MEANGENE75

let me pose this question, for my 4 door daily driver, do i even want to go to l92heads and intake? seems like every response here has a vic jr and is leans more toward the best track time. thats not what im after with this truck. needs flat torque curve and power to move the 22's. i like having the horsepower, though i probably dont need anymore, but the torque is what im after. should i maybe just go to a tbss intake and 90mm tb on my current setup?
11-03-2009, 12:01 PM
txarkitekt

Using the heads you have now and the TBSS intake/90mm TB sounds like a good plan. The Vic Jr intake loves higher rpms. That is where it makes its power. I am sure that is the exact opposite of what you want... You have a TB verter and a smaller cam--those both would not fit well with the Vic Jr.
11-03-2009, 01:14 PM
skeet

Quote:

Originally Posted by MEANGENE75

let me pose this question, for my 4 door daily driver, do i even want to go to l92heads and intake? seems like every response here has a vic jr and is leans more toward the best track time. thats not what im after with this truck. needs flat torque curve and power to move the 22's. i like having the horsepower, though i probably dont need anymore, but the torque is what im after. should i maybe just go to a tbss intake and 90mm tb on my current setup?

the vic jr wont help, you'll loose low end tq. with a stock cubed motor, i feel they work better on a large bore motor like dtr's setup. if you wanna go with the l92 heads then use the l92 truck intake. it works well for what it is, i been very pleased with it. check sig for stats on tq. and rwhp ;)

if youre some what on a budget then i would mill some 243 heads and get the perfect cam. which would need to be spected out for your setup.

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