raap5l

hey guys, thought i head overseas for advise as you boys have been playing with LS1's for a few years.
heres the story, ive recently done an engine conversion in my 1990 holden commodore (early model to your new G8), same company as the pontiac GTO. anyway, i fitted a 1999 LS1 into it, with t56 manual, and 4.11 geared 9 inch diff. so far it has 1 3/4 headers, into twin 3inch stainless exhaust, and mafless tune, cold air intake etc. the car weighs 1400kg, which is approx 3000lb i think?? in current form it would be good for mid to high 12's...and i want to get it well into the low 11's.

what cam/springs do you guys suggest.

the car is a daily driver, but im not afraid of an angry idle, infact i love nothing more then the sound of a tough cammed up, NA engine. im aiming for approx the 400rwhp mark, which will be plenty to net those times with the cars weight and gearing etc.

any advise would be much appreciated

chris

kistlerjm9

iTrader: (24)

imo i love the ms3 or similar. some ppl love smaller cam. its all in you personal opinion. i daily drive mine and put down 425 with stock heads and full bolt ons. that was only an ls6 intake as well.

Phoenix_Master

Since you have headers and an exhaust I suggest you talk to one of the reputable vendors here for a custom spec cam.
I'm starting to discourage cam's that are "off the shelf".

raap5l

unfortunatly at the moment it has a ls1 intake, but i can get my hands on an ls6 pretty easy. id rather do this, as its a much cheaper alternative to the next step up which would be a FAST 90mm intake and TB. locally there are so many boys doing fast times with just an ls6 intake....id rather keep it that way then spend heaps more for the FAST setup.

guys over here are doing 11's with cams and bolt ons, both in stalled up autos and M6's, in full weight cars which are approx 200kg (400lb) heavier then mine.... so im thinking a sizable cam would be the go to get me into low 11's, possibly 10's with right car set up.

PS. i have stock heads at the moment, and are leaving them stock for now, simply for the cost of em, i may not need them to achieve the results i want.

silver01z06

i had a 232-232 600-600 114 in my ls6. it made 403. there are several other cars around something similar. i like the 23x range cams and they should make the power you want. cams like the ms3 seem to be good options as well

Ragtop 99

iTrader: (7)

232/232 110 108. Definitely get the LS6 intake. 228/232 109 109 would also be fine.

njc.corp

at least get a ls6 intake and work your way up-

raap5l

LS6 intake is easy, i can get one anyday, and will do before or at same time as cam..
for now id like to leave the heads standard, and retain the stock rocker arms. these cams you guys are suggesting, can they be fitted to stock engine before piston flycutting etc is required. whats the maximum lift, assuming virgin heads and gaskets, without flycutting

ringram

And port the stock TB
The 1990 VN is probably a bit lighter than the VT model, so maybe something like a 228/232 choose your valve events to match your heads and compression ratio. If you can get a set of LS2/6 heads to replace your LS1 heads you will be better off too. There should be a few around at a fair price.
Ported heads will get you 11's easy. With the restrictive intake look at area under the curve not peak power. The intake isnt going to flow as well up top, so go for fast ramps and a good lift and keep your torque up.

raap5l

ill prob look at a larger TB and LS6 intake, perhaps a FAST intake if i get keen. the vn is about 200-250kg lighter, so i have that advantage. it will hit 11's easy with just a cam, just how low in the 11's is the question. ill price up some heads later, but i wanna see what i can get out of it cammed

slow trap

iTrader: (22)

i'd get something like a 232/236 comp cam on an xer lobe with around a 110. a cam like that one will lose you probably 10 rwtq down low but since your car is lighter than most camaro/firebirds it will still come out of the hole pretty hard and pull up top alittle stronger. there is some very knowledgeable folks on here that will maybe chime in with their suggestions. a cam in that range should have enough ptv on stock heads/gaskets,heck people use the t-rex without flycut pistons which is definitely bigger .

raap5l

that sounds pretty nice. 110 would have a nice note too. ill only be revving to about 6500-6700 as its standard bottom end... any higher rpm is gonna need the larger intakes etc

Prerun4fun13

iTrader: (6)

+1 I daily drive my car

raap5l

who makes the MS3 cam, and what are its specs?

raap5l

anyone else got suggestions?

silver01z06

ms3 is (magic stick version 3) by Texas Speed, a sponsor here on ls1 tech

DANOZ28

iTrader: (1)

hello auzzie friend / mate! i visited australia in 2001 and loved it! everyone was friendly, melbourne (mel burn), brisbane and cairns (cans). if /when i'm able to retire someday i already have a 1 month long vacation / holiday planned out! (i missed visiting kakadu park) i'm a conservative cam guy however texas speed has a big t-rex or ms4 cam call them to make sure that fits your needs. a very popular cam on the board here is the tr224. in a hot rod mag article jan 2006 issue comp cams tests a 613 lift 232/234 dur cam that makes engine dyno 513 hp with fast 90/90 intake. just my 2 cents.

robertbartsch

What kind of emmisions test do the Ausie guys run down under?

Sniffer tests will make it hard to pass with a big after-market cam. If only a electronic diagnostic test (idiot light test) go for a meatie bump stick.

Remember, driving in traffic with a car that does not idle well is a PAIN, so moderation is suggested!

raap5l

emmisions is just as hard as any country. you only get tested if the cops pull you over and hit ya hard and send ya to get an emmisions test. this isnt of my concern, no aftermarket cam will meet the standards.

i want a lumpy idle and be able to snap the throttle and bag the tyres to limiter

PREDATOR-Z

Custom

231/240 .643/.609 112+4 LSA
LSK/XE-R Comp Cam Lobes
You would like that one (need LS6 intake and ported TB), will benefit from heads later.

Or

230/228 .604/.588 110-1 LSA
Custom XFI/XE-R

That one would work best for your application if you never plan on heads, ported TB and LS6 a plus.