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Old 01-07-11, 23:25   #1
MR.SUS
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250-270RWKW Out Of LS1???

gday lads,

trying to find out what i would need to do to get approx 250-270 rwkw out of a ls1?? thru a auto.

already got:

-2 1/2 " exhuast with highflow cats and extractors?

what else would i need?

-cam??
-otr/ maff tune?

And does anyone recomend any good work shops and any rough prices??

i know its like saying how long is a peice of string but wanna save a good amout of coin before i start rining around wasteing anyones time cheers
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Old 01-07-11, 23:34   #2
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Old 01-07-11, 23:56   #3
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full exhaust and otr with mafless tune is around 220-240 rwkw.

25% underdrive would be next, then maybe cam etc,

id worry about the auto but as ive been told ls1 autos start messing up around 170-180xxx especially once u work on the engine
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Old 01-07-11, 23:57   #4
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For a genuine 270rwkw and 115-118ish mph car you will need a decent stick through an auto.

I don't think an LS1 would make 250rwkw bolt on through an auto. Maybe go somewhere between 105mph and 112mph depending on how hard you rev it and the rest of the setup.

I would most certainly get an OTR, possibly a set of valve springs etc. I would then do diff gears and possibly a stall. Then look at cam upgrade and a set of cleaned up heads. Money money money is all it is.
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Old 02-07-11, 09:33   #5
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Yep def cam territory to get a genuine 250 or over. Otr/cam/tune/stall and like duke said diff gears at the same time. And put some money aside to rebuild the auto if your gonna give it a hard time. Or regular services and a big ass tranny cooler and hope for the best
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Old 02-07-11, 11:25   #6
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read under my name! contact bretty at lsx garage, explain the situation to him and he will be more than happy to answer your questions! but these blokes ^^^^ above are pretty spot on, im at 380rwkw but it has cost me alot of money lol
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Old 02-07-11, 18:13   #7
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Or if your loaded like Deano do what he's done lol
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Old 02-07-11, 18:27   #8
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deano ya had brett fix ya problem with the belt up yat, if not hurry up ya twit???? get that fixed befor we race it mate or ull just keep sreading belts.........

back to the topic......ya standard exhaust, otr and mafless tune will get ya around 220rwkw on average....any more than that man ya need to do a cam and springs then converter and gears...mate if i were u just put a converter in it with some gears and get a otr and tune done........ull love the amount of power that alone will give

Last edited by boosted_wagon; 02-07-11 at 18:30.
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Old 02-07-11, 19:05   #9
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i got vy ls1 6spd clubby with exhaust done.im over it at the moment.ive seen a few drive in drive out cam and tune packages for around the $3000 mark is this good value?

would i be pushing it to reach 280 rwkw?

ive been hearing up to 300rwkw from cam and tune from a couple shops.legit or a bit of fibbing going on?
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Old 02-07-11, 19:11   #10
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Or if your loaded like Deano do what he's done lol
was loaded but car has cost me a arm and leg and i dont even drive it!

---------- Post added 02-07-11 at 18:43 ----------

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deano ya had brett fix ya problem with the belt up yat, if not hurry up ya twit???? get that fixed befor we race it mate or ull just keep sreading belts.........

back to the topic......ya standard exhaust, otr and mafless tune will get ya around 220rwkw on average....any more than that man ya need to do a cam and springs then converter and gears...mate if i were u just put a converter in it with some gears and get a otr and tune done........ull love the amount of power that alone will give

still havent been back there mate but i need do! belt seems ok so far but pulley needs to still be adjusted by about 3-5mm i think! i needa go back anyway just been busy, got a rip shift to go in, needs a touch up tune as it wants to stall sometimes when i stop (pain in the arse) airbag light is on aswell! get a few things sorted/installed there before we race! bloody cars pain in the arse
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Old 02-07-11, 20:12   #11
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cheers boys some good adive, me and my mate are looking into it. i got a fresh ls1 in my vx ss that i wanna cam etc. but my mate has got a vy ss auto aswell with 250ks still goes okay but he wants to get more power, will he need to rebuilt because of the k's or can he just get a cam and head package ( his alredy has otr and maffless with exhuast and diff gears)
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Old 02-07-11, 20:58   #12
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Alot of people have cammed 200km+ cars and got good results. Just comp test it first and see what condition its in.

Quote:
Originally Posted by NASTY1 View Post
i got vy ls1 6spd clubby with exhaust done.im over it at the moment.ive seen a few drive in drive out cam and tune packages for around the $3000 mark is this good value?

would i be pushing it to reach 280 rwkw?

ive been hearing up to 300rwkw from cam and tune from a couple shops.legit or a bit of fibbing going on?
3k sounds pretty cheap. Around 300rwkw will be a pretty big cam in a ls1. Heads will get you there easily.
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Old 02-07-11, 21:02   #13
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im still running stock heads, stock diff gears and crappy exhaust! they are my next upgrades along with hsv/harrop brakes! ooohhh money
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Old 02-07-11, 22:25   #14
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I'm running the standard hsv headers with a twin 2.5 inch.

If I can pull 280rwkw I'll be a very happy lad
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Old 03-07-11, 04:19   #15
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Quote:
Originally Posted by MR.SUS View Post
gday lads,

trying to find out what i would need to do to get approx 250-270 rwkw out of a ls1?? thru a auto.

already got:

-2 1/2 " exhuast with highflow cats and extractors?

what else would i need?

-cam??
-otr/ maff tune?

And does anyone recomend any good work shops and any rough prices??

i know its like saying how long is a peice of string but wanna save a good amout of coin before i start rining around wasteing anyones time cheers
http://www.hp-f.com.au/
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Old 03-07-11, 11:03   #16
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Guys it really comes down to the engine as a package.. big cams in stock LS1's don't work that well. They sound nice though.

Got to remember half of the 300rwkw cars never see a strip and a qtr of them go and run 112mph and maybe the last qtr make the mph they should with that kind of HP.

As a good reference point, if your cars making 300rwkw and its not doing 118-120mph.. its just not making 300rwkw.

Think 250-270rwkw for an auto setup and 260-280rwkw for a cam only change. Well setup these are still high 11 sec cars.

K's are subjective as some engines have been well looked after and some haven't, just need to see how healthy it is and go from there.

Whoever noted they have HSV headers, probably needs to give them the flick and move onto some better pipes.
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Old 03-07-11, 13:11   #17
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GM Motorsport
VX SS = 274 rwkw
VX with SR Street Race Camshaft, HD Valve Springs, HD Pushrods, 3200 Hi Stall, Full Exhaust, Ramjet & Tune
http://www.youtube.com/watch?v=NqkcMczSUHA

http://www.gmmotorsport.com/home/?page_id=556
VX 375kw Camshaft Package not including Hi-stall, exhaust and otrcai
Package Price Only $3,790-

and like said earlier add a big ass trans cooler and diff gears, so your looking at alot more than $3K drive in drive out
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Old 10-02-12, 20:24   #18
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re- RWKW out of an LS1

I haven't had mine on a dyno but it was putting out about 207 RWKW before I got a twin 2.5 inch exhaust system welded onto it & new cats fitted, it did have a twin 2.25 inch sports system on it (in the VY SS Commodore),it's always had custom headers in it and I've fitted a high flow air filter into it.

Yeah, with a stage 2 camshaft ,you would get those figures you mentioned, I tend to err on what get written up about some of the EFI stuff on the later model cars with OBDII diagnostics.

Someone was trying to tell me my car was running too lean because the LTFT (long term fuel trim) was reading 12.45% on the right hand bank , the left hand was reading 8.59% , the cat on the left hand side isn't as big as the right hand one ,despite being 2.5 inches in diameter , so more air flows through the right hand cat, somebody reckons that the LTFT shouldn't get above 10%.

After a long trip on the highway , the left hand bank ended up being 3.13% & the right hand bank ended up being 8.59% , so I do think what that person said was a fallacy, they said the mixture needed to be changed in the ECU.

I said that because the scale ranges from -100% to 99.9% (lean to rich) with zero being the mid point, the STFT (short term fuel trim) is on the same scale but it usually remains at 0%, I've only ever seen the ECU "subtract" the mixture on the scan tool (lean it out).
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Old 11-02-12, 15:51   #19
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i got 285rwkw in my vy r8, its got
built auto from dtm,
hi stall
3.9 gears
comp cam 224/230
Comp cam pushrods
patriot valve springs
90mm throttle body
melling high flow oil pump
1 3/4 pacemaker headers
twin 3 inch exhaust
arp head studs
mls head gasket kit
also pulley kit and other bits and pieces
its also got 190000km and comp is good.

Last edited by stocker31; 11-02-12 at 15:55.
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Old 11-02-12, 23:54   #20
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im new to this whole LS1 thing, but how does this sound?
stock LS1, standard bottom end, springs (possibly cam, bear with me)
GT4202 on reversed VE manifolds (weld up at home job)
LS6 manifold, mafless tune, possibly bigger throttle body
upgraded timing chain, upgraded pushrods/lifters maybe?
ARP stud kit, head/pistons/mains etc
Standard coil setup
Not sure on oil pump
T56, twin plate clutch
Chucked into my VL calais, thoughts?
Reason for leaving standard cam is through some searching people have been saying the standard cams are decent enough for a turbo setup, but im sure a dedicated grind would be superior
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Old 12-02-12, 09:51   #21
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Quote:
Originally Posted by xAsh- View Post
im new to this whole LS1 thing, but how does this sound?
stock LS1, standard bottom end, springs (possibly cam, bear with me)
GT4202 on reversed VE manifolds (weld up at home job)
LS6 manifold, mafless tune, possibly bigger throttle body
upgraded timing chain, upgraded pushrods/lifters maybe?
ARP stud kit, head/pistons/mains etc
Standard coil setup
Not sure on oil pump
T56, twin plate clutch
Chucked into my VL calais, thoughts?
Reason for leaving standard cam is through some searching people have been saying the standard cams are decent enough for a turbo setup, but im sure a dedicated grind would be superior
Depending what you buy the LS1 out of, VX onwards i think had the LS6 manifold standard.

Depends how crazy you wanna go and how much cash you got.

People have bolted turbos onto stock LS1 and changed valve springs only and made decent power reliably
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Old 12-02-12, 10:08   #22
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Quote:
Originally Posted by xAsh- View Post
im new to this whole LS1 thing, but how does this sound?
stock LS1, standard bottom end, springs (possibly cam, bear with me)
Will need a set of springs at the minimum, 140lbs on the seat give or take.
GT4202 on reversed VE manifolds (weld up at home job)
It will work fine.
LS6 manifold, mafless tune, possibly bigger throttle body
Will probably all ready have it. Won't need a T/B, no point going bigger than the smallest opening anyway.
upgraded timing chain, upgraded pushrods/lifters maybe?
Don't bother. If you have money to spend go for it.
ARP stud kit, head/pistons/mains etc
Wouldn't bother unless you want to jam more than 10psi into it.
Standard coil setup
Will do 1500hp
Not sure on oil pump
Factory one
T56, twin plate clutch
Single plate will be fine if the car is light. Have plenty of friends running Z grips in 400+ rwkw cars
Chucked into my VL calais, thoughts?
Reason for leaving standard cam is through some searching people have been saying the standard cams are decent enough for a turbo setup, but im sure a dedicated grind would be superior
Standard cam is fine, its little and on a wide LSA. THe turbo does the work really.
3Chars
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Old 12-02-12, 10:12   #23
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Bang for buck, twin turbos on a standardish engine would be a good move imo
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Old 12-02-12, 11:07   #24
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3Chars
Cheers man, any idea what power that would make on say, 12psi?

Also i forgot injectors/rail (heard LS1s need a return line put in if in a VL)
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Old 19-02-12, 12:22   #25
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My previous VT LS1 made 270rwkw from Brett @ LSx Garage.

1 3/4 stainless xforce extractors
highflow cats
2.5in mild steel redback
Mild cam - which was put in for an FI application
Valve springs
Pushrods
Double row chain
Pod filter setup
standard auto and 140xxx KMs on clock

Drove it for about 10-15xxx KM and the auto was only starting to get a bit sloppy... Never took it to the track so don't have a MPH figure
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