Thule

hi all,

this summer hopefully i will start to drive my camaro agen, after 5 years in the garage,

not that i have bin working on the car for 5 years as such, but i've worked on it and purchased thing for it for a while and while, and then stored it until að do it agen somtime.

the reason my car went off the road was that the orginal 98 ls1 motor spuned a bearing after 32k miles

so the first thing i did was to build a new motor, winter 06-07, its a little beefed up ls1 shortblock w all the recomended modds for that time, patriot stageII 59cc heads, 226.226.585.585 112lsa Cam. harland sharp roller rockers, ls7 lifters,comp cam hardened chromoly pushrods, FAST 90mm, NW90 Tb, compression around 11.4, although i did not purschase AFR's and some huge cam, i did not spare anything i this build, in the end w/everything the motor costed alot.

this motor is basicly still new and unused, i've just driven the car few miles for testing something i've bin installing,
the motor sounds realy great, and on mail order map the car feels so much faster than it did stock, the patriot cam comes in on realy low rpm's and then realy sceams at 5-7k and is just not compareable to the stock motor it had.

but still... today that motor is just nothing compared to all the 400+ cid motors everybody is running today.

and oh man.. do i want a 400cid+ my self? YES i almoast dream abouyt it during the nigths
but that is just not goin to happen.. the countrys economics are in mess an left ving politicians have taxed everthing through the roof, every single parts has doubled its price when it gets to me.

therefore, i have for long time bin looking to a 383 stroker kit, use my block,and allt of the topp end i allready have,
have patricG to spec a cam to make the most of this combo,

usually when i ask about the 383 here ppl mostly talk about gettin a 402 og 408 iron blocks, i do not want a iron block, and the main factor for me is to not have to purchase new heads, a good set of heads is 4-5k arrived to me,
the patriots ls6's i have are no horspower freaks, but they have 59cc chambers, big valves and did real good in flow test, so i will use them agen, and only change the rolling assembly along w the usual process for the block and little things that follow builds like this.

i am mostly writing all of this because i am not looking for opinions on what else i could do.
i want to know what i could expect from a 11+comprs well built forged ls1 383 with my heads. intake/tb and some good Cam.

and i would really like to get opinions about the 383 set ups in general, what to and what not to, what brands of parts, prices and so on,

best regards
ivar markusson (drunk)

99slobird

iTrader: (1)

My 383 numbers are in my sig and they were through and auto and a 12 bolt I haven't got my tfs 225 heads back from machine shop yet so no numbers there. Anyway I love my 383 and the main reason why I went with one is because I can pop my hood and can claim the original block. With that being said I'm building a iron block in case of emergency lol. You won't see any real big numbers with a ls 383 but me with significantly less horsepower than some of the iron block big cube motors I haven't been beat around here by my friends with larger motors makin 500 horse or better. To each their own

Troy5061

iTrader: (19)

Im in the process of building a 383, I would have like to do a 408 but the money is just not there.

Thule

yea i guess that saying "dont want iron block" is not true. though i do want to have them aliminum.

as i understand stroking from 346 to 383 gives you the benefit og goin 10¨ larger on the cam, with -2 or -4 piston that is gettin quite large cam.

i have flattops. and with the 59cc chamber i dont have much options in cams over the around 230ish dur, w/o flycutting,

not that the 383 kits are cheap. but for me being able to use my heads is a major factor, bougth tjem in 07 and they have never bin in use

99slobird

iTrader: (1)

I went with this route, scat 4340 4 inch stroke crank, 6.125 scat h beams and a je -10cc inverted dome with valve reliefs....... I can run just about as big of a cam as I want. With my ms3 we checked ptv and the valve was no where close to entering the relief

SREETRACEGUY

iTrader: (13)

My friend did a 383 with his LS1 car all i can say is BUILD A GOOD TRANS lol

99slobird

iTrader: (1)

And with a 64cc head my compression was 10.3 with a .51 gasket and my tfs are getting cut down to 60cc and using a cometic .40 gasket to get my compression around 11.2 - 11.1. Somewhere around in there

SREETRACEGUY

iTrader: (13)

You won't get lots more horsepower out the deal but you will get ALOT of torque so IMO its def worth it

CMKworm

iTrader: (2)

I am getting ready to start mine. I also wanted to keep the original block and save some money.

dr_whigham

iTrader: (49)

I think I'm going this route as well.... the only issue I have right now is the only machine shop in town does NOT have an LS torque plate.

Good luck, OP. In for results / more advice.

99slobird

iTrader: (1)

Browns engineering in Aberdeen Mississippi did my short block. Real nice Christian father son business with a shop floor you could eat off of lol he has a ls torque plate Cost me around 3200 for parts labor and clearencing Talk to Robert there super nice

ausls1

I went 383 cause same deal wanted to use my orriginal block and heads, still building it but the best I found for kits was tsp, I ended up getting a k1 4" crank, 6.125" rods and wiseco pistons here only cause our import taxes once you get over $1,000 are redicoulus which I'm not looking forward to paying the extra for my fast 102 setup when it hits our shores, but see how we go there. I was looking at a 231/239 113 comp can for a 346 and was looking at a tsp 244/248 112 for a 383 but ended up going a comp 235/243 113, the bigger brother of the first mentioned cam so see how that goes, I'm getting my 241 heads machined, my biggest cost sofar has been the machining side off it cause I can't do it my self, but I don't regret a cent spent.

Iv got -8cc pistons and 0.027" headgaskets for 11.1:1 comp with 64cc heads, but may change that to a 0.040" or factory gasket to drop comp to 10.5:1, a bit unsure with the 0.027" gasket being too thin.

ausls1

You won't have to do as much as me though as you already have a decent manifold, would've got a 90/90 or 92/92 if I could've found one, also every one told me to get 1-7/8 4 into 1's so if you don't have these add this to the list, but if you already have the rest of the exhaust this will save you costs too. A lot have said its worth it though. I'd give you costs so far but Aus prices and us prices seem to be a bit different from what iv seen. Good luck though.

Thule

i think my current top end and fuel system is ready for the kit+bigger cam

for me the most horsepower change would be in the cam, goin from a 226/226 585 to 24x/24x 630ish lift or more should be a huge change
and because of the added stroke it would not loose all low end grunt.

ausls1

Yeh that's it, I went with my comp can cause I like the rpm band and should produce some nice street able power being 99% street driven, starting to think should've gone the 244/248 tsp cam but see how it goes. What size injectors do you have? Been told 42# will be perfect and give some room to move. I know some people running 62# on 346 head and cam but there running e85.

LilJayV10

iTrader: (39)

Thunder Racing did a 383 build a while back they listed in the dyno section. It put down like 560hp and some ridiculous torque.

Thule

i have 36lb's injectors, if i could still use them that would be grate, but i am not expectin it as i would most likely add a second stage to the nitrous as well

ausls1

Will have to check out that thunder racing one, I'm not an expert with performance sides of the automotive industry but you could always see how they go if sticking to some sort off budget and see what there at with the tune. I was told 42# for the extra room so could see how it goes. If you want a list off what iv done sofar I can pm you the list for more of an idea.

Thule

yeah it would be great to see your list.

i would also like to know more about what brands of rolling assembly parts are available, i know the big brands, lunati eagle and such, but sometimes i see ppl here talking about other cheaper brands.

my car should be somwhere around 420-450rwhp as it is now.
my goals for that combo would be 24x.24x 630ish lift cam, 11+ compression, and hopefully 470ish rwhp,

ausls1, i see that your are not in the us, where are you located?

ausls1

Will pm my list so far, nah I'm in Australia.