Im getting a list of parts I need to order for a combo that hopefully puts me in the 450whp range without nitrous and is capable of running a 200-300 shot.

-2001 LS1 block
-6.125 Eagle H beam connecting rods with ARP2000 rod bolts
-Wiseco or Diamond piston with steel top ring
-Clevite H bearings
-ARP head stud kit
-AFR 205 66cc heads.

What kind of piston should I get? -2cc? Flat top?
What kind of headgasket would work best for this setup?
Rockers for the heads? Can I keep stock push rods? How about lifters?

Im coming from working with a lot of imports and have come to realize domestic engines are an entirely different ballpark. Id appreciate all the help I could get in terms of what I should be looking at.

 

get new push rods,and gap the rings wider.get a custom cam from Patrick-G.what kind of gas will you run with NOS?.you will need a bigger fuel pump and injectors.get some yella terra rockers.how many miles on the engine?

 

Motor is ready to send to the machine shop right now. It will be fresh when I begin assembly. Fuel pump is a walbro 255.

What size injectors would be good? It'll just be 93 pump. I had planned on running direct port for the nitrous, or at least I assume with anything over 150 shot direct port is the better choice?

 

Stock cubes?

 

stock crank and stock rod length. Im sure I'll have to bore it out a little to fit the new pistons, but thats just to something like 3.903 or 905. So ya, stock cubes.

 

For that big of a shot you will need to run a stand alone tank with like 112 octane gas in it

 

From what i have read nitrous loves compression and a cam with a good split.

 

Your engine parts look like a good choice. You need to make sure you are careful with tuning - need to pull a lot of timing to runn 200 or higher shot. Fuel pressure and window switches are also really mandatory at this level.

Drivetrain will take a beating with this - I hope you have a 9 inch back there. If you are a 6 speed, you will need a good clutch too.

I used to run a 200 shot on my Gen I with an old all iron 427 BBC. Traction on street tires will be useless.

 

Rears are 335s but through the stock RX7 differential. Probably gonna have to putt a kaaz or something in it just so it doesnt blow up. Then I'll just see if it takes it without snapping an axle.

I have a T56 Im rebuilding right now with all the upgraded parts. The monster clutches looked nice. Very nicely priced for what you get.

 

The stock rockers are good and you do not need to replace. Perform the comp cam trunion upgrade and keep using them. As far as lifters go I would probably replace them. They have mileage on them already and the engine is apart. Its been awhile since I bought any but they arent that expensive and taking it back apart because they are used already would just suck. LSx engines have weak push rods. Definately upgrade them and they are cheap.

For nitrous if you want a 200+ shot then you will probably have to go direct port or some sort of 2 stage. Been awhile since I looked around but there might be 200+ shot plates out there now.

For fuel you will probably want to upgrade injectors to something along the lines of 42 pound injectors. Since your running a wet nitrous kit you dont need injectors to add fuel for the nitrous. For as big of a nitrous shot you want you will probably want a stand alone fuel system and use some sort of high octane/race gas in it.

Do some checking as far as head studs. It seems like I have read stuff from people talking about with the cowl and studs its hard or impossible to get heads off with the engine in the car.

Cant go wrong with AFR heads. Great performers and will make power. Make sure you match the cam with your heads and what you want out of the car/setup. There is nothing wrong with off the shelf cams and to many times people start yelling custom cam. Just make sure the cam you get is good for your setup and wants of the build.

For pistons pick a manufacturer and call them. Tell them what you want and let them spec the pistons. The piston or head company can help you figure out what gasket what you will need.

 

2 degrees timing for every 50 hp and run a standalone with C16. For more nitrous info check that section but so far your setup is looking good.

 

Thanks. This is going in a 94 RX7 btw.

 

the monster clutches are great clutches. I love my Textralia also.