hi, ive been reading forums all over tgo and ls1 tech but anways, i was planning on a 383 tpi engine,11:1 dart pro one's 215, comp nitrous cam 233 490lift 244 501lift on a 113, edlebrock base, ported plenum, modified runners, 58mmtb , and tunign with the prominator , goign out through a 25-2800 stall and a tci shift kit in the 700r4 or my other option,
-99 ls1 6 speed, headers, cam , cold air, for now, all emisions delete
ethier set up will recive a 150wet shot
-01 ls1 -4l60e cammed, stall, headers, cold air, factory ls6 manifold
my goal was mid 12's on motor i seen #'s for both. But the ls1 seems to have room for upgrade later, better mpg and 6 gears to bang threw. this is for basically a street car has a 6pt cage, sfc, some minor weight reduction, i will run some time trial and test and tunes with the car and street race i like the toque of the tpi and im afriad the ls1 wont do it for me i have driven a 99vette 6speed and the car pulled like crazy etheir way i go will cost about the same amount of money, do you think 450hp is obatinable with a 383 ltr, would would you do? i think the 6speed would be more fun to drive

 

LS1 hands down, no question.

same power right now... with better drivability, better MPG, and you can go much much faster from there.

you should be in the 11s easily with the LS1 + a TINY cam....

plus you get the 6spd.

 

get the 01 engine with the 99 6 spd

 

LS1 6spd

 

i wouldnt go LTR 383......if you do 383, go with a HSR. MUCH MUCH better power potential. plus step up to a cam with abit more lift...more like a .550-.570 to better suit those Dart heads. then go 3400 stall

but like the others say, the LS1 with good cam can make near 400whp. some over that. that 383 you have in mind might make around 380-400whp if tuned well but thats on the high side. it will use more fuel too. the HSR version i'd run would be up over 400whp but still use more fuel than ls1.

if money isnt that much of a concern, i'd do LS1 with cam and then later down the road, ported heads. just shop around and find a good drop out with everything you need. i seen many goin for 3000-4000 bucks.

and if your somewhat automotive mechanically inclined, you could pull off the LS1 swap as some things need fabbed/shift things around abit to get it to work

 

The Jan 07 issue of Chevy Performance has a 383 Vs. LS2 article. Compares price, power, and quite a few other things. Very interesting read. If you can't get a hold of it, I might be able to scan it in for ya.

 

hows about a 383ci LS1.. best of both worlds.. and forget 12's, on that 150 wet shot you're going to be in the mid to low 10's..

 

The 383 if built right will take a harder beating from what my friends go thru, one is on his 3rd ls1 motor, we beat the snot out of our cars, if you do not rag your ride as we do go ls1, ether would be great, but a street car is fun to bang gears, remember you have to notch the k member to use the ls1 A/C compressor, but the LS1 is also lighter so it is kind of a win win situation with the gen three motor.

 

try 9's...hehe. member of a local board went 10.9 all motor. also, technically its a 382.. 3.90in x 4.000.

the sbc has a better oiling system because everything is at the back...BUT... with the right pan and pump...an ls1 will rev up to 6800 without new rod bolts and not explode. with new rod bolts ive heard of a few beng brave enough to go to 8k on stock internals.

 

01 LS1 with 4L60E.

 

if you dont wanna notch the k member can you just buy a k member for an ls1 from sphon?

Id say go LS1 just because if you look they really are easy to find and performance parts for those are in endless supply. The easier the parts are to get te better it is when you break something or wanna upgrade.

As for 150 wet shot id watch out with nos, i know alot of ppl run it, but i know first hand of ppl using too much nos and bowing up the intake manifold. nos unlike a turbo or supercharger has a nitrous backfire which can ruin everything. The forth gens have tubo kits too so running the ls1 you could go the easy way and not have to deal with a custom setup, pay the extra money and get some crazy power. plus you have no ackfire on a turbo and can dial down the boost if you dont wanna run insane hp on the street all of the time then crank it up when someone wants to race.

 

Yes, spohn makes tubular LSX swap K-members.

You might not have to notch the stock k-member either, the LTX-swap guys who keep a/c and use stock brackets just take a big hammer to the k-member. Just keep hitting the k-member until they have clearance. I don't know if that would work for LSX-swapping.

 

[QUOTE=turbochargedrs;3188012]if

As for 150 wet shot id watch out with nos, i know alot of ppl run it, but i know first hand of ppl using too much nos and bowing up the intake manifold. nos unlike a turbo or supercharger has a nitrous backfire which can ruin everything. QUOTE]

no, plain and simply wrong, they blow up their intake manifold because they dont use it correctly, if they had a window switch set at the right RPM the nitrous and fuel wouldnt have a chance to build up in the manifold to blow up, the backfire you are talking abuot can just as easily happen with a turbo or supercharger, it just means that it is too lean, which is not the fault of the n20, and please stop calling it nos, thats a brand, its nitrous

 

well guys still undecided on engine i can get a 385 fully forged or 6speed ls1same cost ethier way, im almost ready to go 383 with a carb, who thinks 2800stall 450hp ish and 15mpg is possible 700r4 3:45 borg .as for the nitrous ill be using a jacobs nitrous mastermind and i have proir experiance with it i ran a 150shot on my 305 and every one that seen it tought i was crazy. never had a problem with that, except bald tires

 

You want the best of both worlds,why not go carbed LS1. I've gotten my 355ci to hit 12.97's on motor only considering I don't really have that much invested in it. But then Again LS1's seem to respond to nitrous and simple air in and air out modifications a lot better than carbed setups that I've seen.

Hope it helps,

Eric....

 

LS1 price and takes some mods to make it work. 383 its cheaper and require no mods to car. if you put AFR heads on 383 they will hang or beat the 15, 18 degree heads on LS motors

 

good heads like AFR or ported others will only hang with LS heads. they may beat them stock but after LSx heads are ported out all the way, they are way better than 23 degree gen I chevy heads

 

1. the LS1 is cheaper.
2. you're talking about putting CNC ported $2,000 aftermarket heads to match the performance of a stock, unported head motor..... that alone should tell you you're looking at the wrong engine architecture.

dump the LS1 in it, cam it... go faster, for the same price as a BASIC 383.... and whenever you get $600, get some CNC ported LS1 heads.... and then go even faster....

 

bunch of bull

 

You could invest in 1950's tech or 1990's tech, you decide.

If i had to do it over, i'de start with the LS1. For any given power and displacemnet it has better idle vacum, is lighter, has a 6 bolt bottom end, is less likely to leak, will get better mileage, has better EFI and a much better head design.

 

Somkin--I can tell you that I have a 92 RS with a 6pt cage 383 and 700R4 trans with O/D that is street legal and runs 11.80's on motor and DOT street tires. Give me an email address and I can send you video of my runs, if you would like to see them.

Later