Ok I broke my motor..... after 200 miles
http://i107.photobucket.com/albums/m...572/piston.jpg
I got that.

I wanna build a 383 now. What all do I need? Any one got any ideas on parts.

I found some fordged 383 scat kits on summit for 1400 bucks, which I didn't think was bad. What all do I need to change or modify for a 383?
Thanks
Any help would be great.!

The kit that I am looking at is this
http://www.summitracing.com/parts/SCA-1-41705BIE/

 

Dayum, how did you break a chunk out of your cylinder wall?

 

Thats a chunk out of the piston.

 

Keep in mind when your looking at these kits that you wil need a one piece rear main an that yours is externally ballanced on the rear. Not a problem if you replace the flex plate/flywheel. You need to decide how much compression your looking for as well. The one kit you show has domed pistons , that will increase compression by a bunch. Also what do you plan on doing with it. If your not spraying it you don't really need forged stuff unles you. Again it all depends on what your donig. My besy advice would be to have the balace cjecked if your bying it from the manufacture or ware house. I have checked alot of these kits to find them all over the map as fare as the balance goes.

 

I have no intension of any spray or boost at all. Just a nice 383 that can run on pump gas like 93 octane. I will also be getting my heads done by loyd elliot.
I will be buying a new flywheel, so I was hoping that an internal balanced setup would work with it. I'm just not sure what a good kit is. I have built many stock lt1's and 350
s just not anything else. I have a local shop that will bore the block for me and clearance it pretty cheap. I will be doing the assembly, but just need a good kit that can handle 7k rpm and the le3 heads. I wasn't sure if the cast stuff could or not.... any advice?
Thanks guys.

 

A little more back ground on the setup, I have longtube headers, patriot gold extreme springs, with 1.6 comp roller rockers, 7.2 inch pushrods with guide plates. I also have my favorite the GM 847 cam in it. The cast kits seem to be able to handle the 500hp. I guess I am not familure enough with them to assume that I won't be over 500hp with this and the 383 with le3 heads.....

 

Like HRE said no need for forged unless you plan on N2O or FI. But if you want to build it right the first time just incase you might want to add to it later I see nothing wrong with that either. A good thing to add is your HP goals and are those goals FW or RWHP goals. I would checkout flatlanderracing.com for a rotating assembly. They have many different kits available and are cheaper than summit.

 

I see it now. It looks like a triangular piece from the cylinder wall. The reflections off the walls made it look like there's a similar triangular piece of wall missing up at the top. Looking closer, I can tell it's an exposed ring land on the piston. So, no blower or spray? How did you break a piston that badly?

 

Well seems I was a little late with my response. If I were you I would spend the extra $500 or so dollars to be worry free down the line and go with the forged build. I would call flatlander or summit and tell them what you are doing and let them help you out with the kit.

I am wondering why you chose the LE3's and did you talk to Lloyd about them. I am asking because you may run into some trouble with valve to piston clearance with those heads since they use the larger valves. IMO I would recommend the LE2's since the LE3's only make 10 more HP which equals to hardly any difference at the wheels and they may be trouble if you don't have the right pistons. Speaking of pistons I would also ask Lloyd what cc piston and head gasket he recommends with those heads or whatever heads you decide on. With all the other accommodating parts listed off his web site you should be in the 450 rwhp range. Have fun.

 

I didn't even really think about piston clearance.... In that case I might go with the le2 head. I will have to Contact loyd and see what he says. Then call FlatLander and see what they say.



Not sure what broke it. One thing we are considering is detination. Not sure though, Went to pull the piston apart and the piston snapped in half. The rist pin is bent pretty good and I think the rod is bent a little bit too. All I know is I don't want to go stock on the bottom end again.

 

For the Le3's you want to use a piston that has the 2 large valve notches with a -3cc or -5cc flat tops and use a Mr Gasket 5716 for the head Gasket
http://img705.imageshack.us/my.php?i...enmotor001.jpg

 

I highly doubt you will have any PTV clearance issues with a standard flat-top piston.

 

Ok next question, If I do the 383 using this kit http://www.summitracing.com/parts/SCA-1-41705BIE/ along with haveing Loyd do a LE2 port job on my heads and intake. What else do I need to replace? IE fuel injectors throttle body etc. What do I need to upgrade? I know i need a fluid damper. But not sure what else though.
Thanks

 

You also gonna get the cam from Lloyd? I suggest you do. Confirm his setup will give you power to 7K RPM. A 383 needs air and a cam that will work for a 350 will generally run a few hundred RPM lower in peak HP when put in a 383.

You will need minimum 30 lb injectors if you want to play up top in the RPM range. My first 383 was running out of injector at 5200 RPM when they were still stock.

TB is not as important but can be done. You will already have plenty of tuning issues to work through before throwing on a TB, if you want it running like stock. Do TB later when you are constantly running 7K RPM.

What you doing for a valvetrain? I did the LS7 lifters with hardened pushrods and pro mag rockers and 155 lb seat dual springs. No issues running my engine constantly over 6K while road racing.

 

well I see a few things I want to point out

first you want to spin to 7K and you contemplated using a cast setup. hell no if your spinning that high even if your making 350 hp I'd be afraid of something letting go the way I see it forged is a must. anyway with a le2 and a 847 you'll be over the 500 CRANK hp limit of the cast stuff for sure

new injectors, if your doing a LE2 head with a 847 on a 383 you WILL need at least a 36lb injector I'm using 42's on my le2 383 build with a cam similar to the 847 but was told it could be done on a 36 but 42 would be fool proof (for tuning sake)

new TB pretty much a must on a 383 turning 7K or even 6500 for that matter a stocker wont let in anywhere near enough air so if you use a stocker to get the bugs worked out well thats pretty much a waist of time cause your chocking the motor for air so all your air/fuel stuff will be off.

your prob gonna need a 255lph fuel pump to maintain adequate fuel at that high of a rpm

are you auto or m6