What do you think.............





LS1 455ci

Block: Tall-deck ls1
deck height: 9.025
bore: 4.23
strock: 4.05
rod length:6.00
piston compression height: 1.00
piston deck clearance: milled to 0.00

I have done the math but lack the real world experience to tell

1. do these engine specs work/ is it possible?

2. how will it perform?

If any one can help or can tell me where to get help, and not the medical kind, i would be grateful.

 

how will it perform in what?

run it with a stock cam and it will suck wind.

run it with a 25x cam and it could be a screamer.

you need to figure out what you want not just what would be neat to have in a car. seems like you've been reading to many Hot Rod mags with $100,000 buildups and think you can do it.

are you looking for a $20,000 race motor...cause that's prettymuch what you listed.

do you have a hp goal? a 1/4mi goal?

you just seem to spit out random, incomplete, far fetched ideas....and then you get pissed when people blow you off as a stupid little kid who's wasting our time and band width.

are you looking for

 

the calculations work out for your 455ci...but did you actually look up real pistons and stroke (not strock)??

eric listed a BIG ci LSx engine in your last post. with the right cam that engine would easily put out 500rwhp, and be streetable.

you'd have to replace just about everything in the driveline. clutch, trans, driveshaft, rear end.
not to mention a roll cage to keep from twisting the car like a cork screw.

 

I appreciate the USEFUL info

Sorry about the bad spelling...but its friday and i am trying to research and work at the same time

What i want is a 455ci new gen trans am that is remainisant of the 75' SD trans am 455ci. I am even going to get a hood that has been modified slightly to look similar to the 75' hood. as for time and hp not as important. the syle of the car is what i hold dear.

I did pick my sizes based on actual piston sizes and rod lenghts. took some mixing adn matching but i got 455ci

Yes I do read too much Hot Rod

I have priced my project at around $10,000 with some thrift shopping........but i got the rest of my life to finish

thanks again for the reply.....

 

MTI in Houston has a 455 cui engine package for the GTO. I think its LS2 based.

For the hood are you talking about the shaker scoop? Because that started in 70 (not 75) and continued past 75.

What I think is that you need to slow down, do some research, and work up a complete package for your car. All that power will do little good if you spin like crazy. I'm sure you'd be a bit peeved getting beat by a cam only 346 that cost a fraction of what you have proposed due to lack of traction.

 

I have studied for 4 years man......

in fact i am probably over studying.........

but as you all stated.........this is not cheap to mod up a car and find out what works for one car........i just and trying to eliminate as many mistakes as possible...heck 4 years ago i was going to get an lt1.......i went so slow that now i have to study ls1 because there now more affordable.

as far as supension and undercarriage parts...........they are first on my list.....starting with BMR complete kit a 12bolt rear. mild 3.73's, 1le drive shaft, upgraded klutch (viper), aluminum shift fork, upgraded vented lightweight flywheel lowed hypercoil suspension, larger brakes and nitto streets.............did i miss anything.

I am not going to touch the engine until i get as much of the existing hp to ground as humanly possible.....then i will apply more power to the ground.

I believe i suggested this to some one who asked what should he start with first.........suspension.....suspension....suspens ion

I am just recrunching numbers on the engine to keep them fresh and for the ls1 get my options and choices.......ie. differences in lsx's and different ways to achieve the 455ci.........I mean if i think making a 455ci is better in a ls2 or ls7 i may need to consider ways of getting it cheap add save myself the cost of going through two engines

Again........i am doing this TOO go slow......i want to know that i am getting the best for me... not what is best for others and what is the norm for others.

if my google search skills were better i won't both you guys or "waste you time or webspace"

 

sorry bout the broken speach i am trying to work and type......bad combo

 

Like his name says, I think he prolly will die trying to put this project together. Best of luck with it though.

 

And he may kill teke in the process . . .

 

haahaaa....i can kill myself ...myself ....just fine.

ok...now that we have an idea of the project we may be able to help.

but your budget is a bit skewed. the $10K will not get you much more than the suspension/trans/rear

and for the driveline, you need a viper transmission and a stage 3 or 4 clutch. and with that big of an engine, a lightweight flywheel probably ins't the best idea either.

the light flywheel on my cammed ls1 is touchy on the street. but it does spin up fast

 

Yes, and install all those parts with left handed wrenches too.

 

So lightweight parts combo'ed with high hp=bad?

 

Of course lightweight + high hp = bad. You don't want to screw up your power to weight ratio do you?

Sorry I just couldn't resist. I understand you want to do this right the first time, but if you've been waiting to do this since LT1's were the norm, just take the plunge. Just wondering, is this car going to be driven on the street at all?

Abe

 

No, just your discription of stuff made me think of left handed wrenches, blinker fluid, and muffler bearings.

BMR complete kit
Nothing technically wrong here, but there is better and less expensive than BMR.

a 12bolt rear. mild 3.73's
Are there hard core 3.73's?

1le drive shaft
I may be wrong on this but 1LE is a suspension package.

upgraded klutch (viper)
Woohoo a "Viper" clutch!!! Sorry, but that sounds like the guys that brag about having a "Corvette 350" in their Camaro.

aluminum shift fork
Steel is stronger and its the 3-4 fork that commonly causes the probs. This is also where the Viper part comes in.

upgraded vented lightweight flywheel
Vented even? Crossdrilled and slotted to prevent outgassing of the clutch?

lowed hypercoil suspension
This is just redundant

larger brakes
Nothing wrong here. Just stay away from the bling of aftermarket drilled rotors and use good pads. Check out the C5 conversion.

nitto streets
??? As in DR???

Not trying to be an a$$, I just found this stuff funny and that was what ran through my mind.

 

well i have a "daily driver". I just want to see how much naturally aspire power the lsx design of engine can produce. I don't want to use a blower or turbo or nos. just want a big cube small block using the efficient and powerful design of the lsx. I would like a 455 since this engine has significant retro value. But to have it in an lsx seems like a dream. So if i am going to waste money on a project why not the best motor gm has made to date....IMO.

I don't know where you find your parts teke, but, if i do all the labor possible, have the trans rebuilt by a local rebuilder, and i provide him with the upgraded parts i save a whole lot of money. parts and minimal labor is looking like around 3-4k flywheel to rearend. Don't over look use parts in like new condition.