oxrabidus

i was wondering if i could use sbc mounts with an lsx engine... i know that the brackets and the frame part are different from a sbc but the rubber part is what im curious about? because i bought a set of poly mounts and a day after i got them i ran into an ls2 with t56 for a ridiculously low price... if i could use the rubber part it would be nice... if not i could just give it back and get the proper ones... but it would be more of a hassle that way...
and anyone think it could be relatively easy to get 500hp from an ls2? i was thinking either ported ls2 heads or or l76 heads (which according to sdpc are cheaper ls6 head) with a weiand intake and a cam with a dual exhaust and some hugger headers...
thanks for the advice!
i cant wait to get the project started!

oxrabidus

is it a dumb question? i have done a search, and cant find it, i only have found that you need a set of mounts, but thats the metal part that bolts to the motor, i wanna know if i could still use my poly mounts with the adapter pieces?
and how to make a 500hp daily driver ls2...
thank you

five7kid

iTrader: (14)

Not a dumb question, just not in the right place. I'm moving this to the LTx/LSx Engine Swap subforum where it belongs.

You can use the chassis-side SBC mounts with the poly inserts only if you use plates on the block that relocate the engine-side mounts. If you use those plates, you cannot use the factory-type LSx AC compressor (if that's an issue to you).

FWIW, what this swap is going to cost you makes what you paid for those inserts meaningless.

oxrabidus

oh sorry about that...
i did get poly mounts, i was planning a small block build but came into the ls2 for a good price. and i dint wanna have to send them back. but i looked at hawks and fount the plate things i need...thank you...

now that its in the right place... who would know a recipe for 500 hp or 11s with this engine (whichever gets me there... if 500hp is enough for high 11s)?
now consider, i am gonna take some weight off the car in addition to the ls2, fiberglass hood, no ac, anything i dont need to run the engine, i wont have (like heater core, blower motor, maybe some fiberglass door, etc...)... but it will be a daily driver,...
what i had in mind was a cam (dont know which yet... something with some rumble), ls2heads with some porting and ls6 lightweight valves, and a weiand street warrior intake... or the l92 heads... but i have heard that the l76 intake is the weakness of that set up, it limits power to around 6000 r something, but i dont know...tips and ideas would be cool.
thank you

five7kid

iTrader: (14)

Hawks doesn't sell that type of plate. Trans-Dapt does http://store.summitracing.com/egnsea...DS=1&N=700+115
The 4572 is sufficient.

Search this forum for head/cam combos to get to that power level. Apparently not that hard.

NemeSS-TyranT

iTrader: (1)

go with the stock heads, pp springs, a gt11 cam, for good street manners. very responsive. or if need some rowdy power, a trex will put u around 500bhp on stock motor. ditch the ls2 intake and go with ported 78mm tb and stock ls6 intake. if going with trex, a slight mill to raise the scr will prove beneficial. i use ls2 heads on my car. those are my fave casting 243. with ls6 intake, u will be able to spin to 7000 rpm, easy. also wise to upgrade rod bolts.

oxrabidus

i was thinking the new weiand street warrior intake, its supposedly a proven 32 hp and 31ft.lbs up on the ls6 intake manifold... i will do my best with the stock bottom end, arp and stud everything... what is a gt11 cam? and whats a trex?

NemeSS-TyranT

iTrader: (1)

gt11 is ground by LPE, VERY responsive low duration cam, sounds like, runs like stock. but becomes very aggressive with rpm. TREX is ground by Thunder Racing, an all around loping aggressive power band cam. pulls hard to 7000 rpm, becomes even more aggressive with nitrous and stalled auto.
i have owned with both cams, cam in my car is trex, with 243 heads, but i have fast intake, the new warrior is supposed to be better than fast.
the gt11 is more stealth, the trex lets everyone know youre packing heat

oxrabidus

mines gonna be a 6 speed... any idea how those cams would do with mildly ported heads... just some 2.08/1.6 valves and some other mild stuff, whatever the machinist or people recommend...
i like the rumble... i want my car to be a sleeper... but i still want it to sound powerful... let the mustangs and ricers, and hopefully base model corvettes think its just another beat up camaro driven by some metal head haha...
also... what kind of suspension mods would i need to do? this is gonna be a HUGE jump for me... im going from a stock v6 to a 500hp machine... im gonna have to learn to drive all over again haha...

NemeSS-TyranT

iTrader: (1)

do not throw $ in some hogged out heads, really the 243 do not need much work unless u plan on building a racecar. all u need is a vj with stock valves and back cut. or u could drop in some rev 2.02 intake valves.
my car makes 575bhp with these valves. but i did some lite basic porting in the head. but is not needed for your engine at all. invest in springs, pushrods, and tune. the gt11 cam sounds like its more for you. it will also allow you to use shorty headers or stock manifolds. which are more economical. the trex needs full supporting bolt ons, lt, 3in exh., both cams were designed for use with stock heads flow. so they are proven to work with your heads as is. it will sound healthy and will def. surprise.
the m6 will make the car very fun to drive with gt11 and ls2
stick with 3.42 gears, basic susp. lca,subframe conn. etc.

oxrabidus

sounds like a plan. i am worried though with the less front end weight that the car will look lifted a bit on the front... either way i was thinking some 2 inch drop spindles. i am gonna make some sub connectors... i want to make it as stiff as possible... actually have some squar tubing welded along the floor pan to "truly" connect the subframes... i never seen any like that... then a crossmember like the skulte one that has the extra clearance for the duals and run 2 or maybe 2.5 true dual with an h pipe or x pipe if i could fit it...
575bhp thats crazy... is that from 6.0l or bigger? i have a feeling there may be more things modified as time goes on... ive heard that horsepower is addicting...

oxrabidus

i was just curious... how would the 6.0l ls2 do with th gm stage 3 cam for the ls7? they made 100 more hp with it on a stock ls7... 276 degrees on the exhaust! it would probably make the engine spin to like 8k... but just curious really...
i checked out the gt11 cam and it is indeed nice... but they require 921 springs... is there any more affordable spring that would work with the incredible lift? mybe ls7 springs? how much rpm can the stock rods handle? and i just thought about this... i have seen the t56 take much more than its rated max output, but how sure could i be if i make more than 450ftlbs, it was rebuilt so it is fresh.
thanks

andrew69_04

iTrader: (1)

The intakes on a stock LS2 are 90mm iirc. why put a 78mm intake and t/b on?

Also, LS2's are DBW T/B, ls1/ls6 stuff is all cable driven. your going to have to have your harness reworked if your planning on putting a cable driven T/B on, or you need to get the pedal out of the car the LS2 came from.

oxrabidus

the ls2 intake even though it has a bigger throttle body doesnt make as much power, i have read many tests saying this...
i am going to get a ls1 wiring harness and get the extentions for the knock sensors, sdpc has it for 60 bucks it think... the camaro ls1 is cabl diven and hawks sells the cable for te swap for another 60 bucks if im not mistaken... that way i dont have to change my pedals... either way im spending the xtra mone on the wieand intake which is super sexy...

NemeSS-TyranT

iTrader: (1)

becuase the ls6 has been proven to pick up thru out the band over a ls2, even with the 78mm tb
also a 78mm tb is around 100$ ported, a cable driven 90mm start at 300-500$. do not try to use a dbw tb, it will jst create unnecassy expense and labor. a cable will actuate the ls1 tb/ls6 intake and make more power over the ls2.
u do not need 921 springs for the gt11, i use patriot dual golds, always have with just about everything. do not spend on 918's go with the patriot or prc springs which are pretty much the same, thing, also Ti retainers are not needed for 2.00 valves, for street car.

the cam for the ls7 was deigned for the ls7 heads, will not work optimal with ls2, if anything it would improve l92 heads engine, since the l92 are ls7 "type"
arp rod bolts are added insurance, but the ls2 comes with ls6 design rod bolts which are improved over ls1
imo the ls6 will net the most power for your buck, the weiand is really not needed. unless you plan on max effort engine, and thats a whole nother game.
i would not build a n/a 364ci ls2 when i could build a 375ci for same price
or lower if using iron block.

oxrabidus

well that makes things a whole lot cheaper for me eh... i heard that 7k plus rpm is pushing it for stock rods, but that was on a truck lq9. either way it wont hurt to get the arp bolts. anybotdy know where i could get anything besides forged pistons that are 20 over for the ls2? all i have found are forged pistons... i dont think ill need those for what im aiming for... spdc sells ls2 and ls7 controllers with wiring and everything for 900-950... i iagine the ls1 ones are about the same... i just dont have th part numbers for it...
now... do you think high 11s are possible with what im going for?

NemeSS-TyranT

iTrader: (1)

my car does not have forged pistons, i use arp bolts in stock rods, and i turn 7k rpm when i gets on it. my rods are lq4.
my engine .060 over lq4 with 243 heads, speed pro pistons.
over 9k miles and counting on motor

oxrabidus

well my situation is a bit different... i would need 20 over pistons because that is the maximum recommended overbore on a ls2 block. the guy that gave it to me dropped a valve and needs to have one cylinder resleeved and the head needs to be welded... i dont really know if i can count on a welded head... so im gonna see about getting me some new/used heads for cheap... sdpc has ls2 heads for 320 so i imagine that bare they would be like 250... but i would just need stock replacement pistons... and i havent been able to find total seal rings for the ls2 or any lsx engine...
its good to know that it can handle it... that gt11 cam i was looking at it some more... it looks like a slightly bigger ls7 cam but thats just judging by the durtion... either way my heart is set... gt11 cam, stock bottom end, 2.08/1.6 valves, an intake... sdpc sell the controller kit with the electronic pedal for the drive by wire so i may just spend the extra cash and get the weiand intake with a nice throttle body... i got time to save up so i could spend the extra cash..
hoping for 11s as i said... but anything is better than my 2.8l haha...

NemeSS-TyranT

iTrader: (1)

new plan,
l92 heads with weiand intake and 90mmtb
gt11 cam with pp springs
im worried about that dmaged sleeve now.
ive actually sleeved a ls1 block with darton sleeves. i would never do it again, cheeper to go with new block. the ls2 u are getting is not usable as is

oxrabidus

yeah its not useable as it is. but im getting it for 250, i found the sleeve at sdpc for 80 bucks... and to resleeve that on cylinder is gonna be 3-400 bucks... so thats a ls2 rebuilt short block for about 1500 bucks... i don think its a bad deal...
but the l92 heads require a specific intake... unless weiand made s a street warrior intake for the l92 heads? that would be awesome... im gonna upgrade the t56 with the viper mainshaft... i read it holds 550 to 600ftlbs with just that mod...
those heads have craploads of potential... specially with that cam it almost reaches its max flow point... but i heard the weakness if the intake, and i dont want to put money into making a carb intake into efi either...

NemeSS-TyranT

iTrader: (1)

a word of advice, if i may
ur going about the wrong way imo, dont bother with the damaged ls2, u mentioned that the head is also damaged, so really ur buying a unusable engine, and 1 head, if the heads were 100% intact, usable as is. then i would reconsider. but they have no resale value if 1 is damaged, when these drop valves, they usually take the guide and seat along with it, if it requires welding. thers no point.
i would advice u find, a lq4 longblock and have it bored, .060 and have a 375ci engine. and u will also be able to use the stock 317 which are same as 243 but with larger chamber. a .030 mill and ls9 gasket will be around 10:1 scr.
dont buy into the iron vs. alum. weight debate. the iron is around 65lb. heavier over alum. block.
also just for refernce, gone 10.73 with steel shift fork, and basic upgrade t56 rebuild, sliders, blocker rings etc, nothing fancy. no viper shaft. u wont need none of that. for this motor. a genenal upgrade rebuild is all u will evr need for street/strip. now if u need serious driver mod, thats a whole nother level.
the 10.73 car now as th350 and 4200 stall and clicks off consistent 10.10's on pump gas. and dr.the car is friends, the engine is 370ci with custom cam and dart heads i put together. fast 90/90.
the owner best pass was 11.88 iirc. smart guy. so went a3.

oxrabidus

i was thinking about that all last night at work... the cost of using hat ls2... i may just do that. i was digging the aluminium block 65lbs makes a bit of difference but...these cars are lighter than alot of newer cars as it is... that or i could spend a little extra and stroke it up to 415ci... that should be nice... what about the 4.8l? i heard they could be bored out to 4" bore? these are cheaper than lq4s or lq9s...

NemeSS-TyranT

iTrader: (1)

negative, they can be bored 3.905 max, but i wouldnt go any more than .060 which leave cid right at 302 or 5.0. my truck used to have a 4.8 stock, and man did it run hard for being a 4.8 and they rev lighting quick.
they are an excellent motor.
to say the least, if i was on a strict budget i would a take a 4.8 over a lt1 or any tpi any day of the week. thats how go good of an engine i think it is. i used to machine these engines and still assemble them. if u need part numbers for cheep pistons and rings. lmk

oxrabidus

that would be appreciated... i am probably gonna spend a little extra on maxseal total seal rings... or i had this crazy idea! have a custom crank with a 3.48 stroke and mak a 40 over 305... haha... just a thought... i see 4.8s on ebay for like 350 running so that will probably be th route i take now... lq4s and lq9s are becoming more wanted...
if you could get me part numbers for pistons that would be appreciated... but it would be harder for me to hit high 11s or low 12s with this motor... not that its impossible... itll just take a bit more...

NemeSS-TyranT

iTrader: (1)

another lq4 i built is making 620rw with t76 turbo. pistons are not forged, the rings are speed pro hellfire, but the moly speed pro for use with the cheep pistons, are fine for any street strip car.
the pistons i speak of are not forged, but make for excellent builds.
a .060 over = 5.0.
if need n/a 11-10 sec. car then lq4 is way to go.

oxrabidus

i will look into finding an lq4... but if anything a 5.3l is also easy to find... either way i go i am going with the gt11 cam and since im going to save a bit on the actual motor ill port the heads a bit... with the same mods on a 4.8l you think 450hp is possible? and what would that turbo 4.8l make without a turbo?

NemeSS-TyranT

iTrader: (1)

if u find 5.3, .06 bore will make 5.5, use stock 243/799 heads. no need for porting, besides valve job, use 4.8 flat top pistons on 5.3 rods for high compression engine. you want around 10.5-10.75 with gt11. 450bhp is very possible.
one guy on turbomustangs is making over 700rwhp with 4.8 and t88 t6 turbo
stock upgraded longblock

oxrabidus

i dont know but i can get ls7 sleeves installed for 145 for each cylinder... with the price of the sleeve included... that seems like a good price to me... thats about 1200 for 382 ci block...i already have crank and rods from the ls2, just would need pistons obviously, i think those are good prices.
ah good set of ported 2.08/1.6 ls2 heads with the gt11 cam, i think its a good idea...
i started thinking crazy ideas and said, ls7 heads with gm stage 3 cam, 600hp baby... then i remembered ls7 heads arre 1400 each...