im planning on building a 396
already have a shop that will do the boring, seprate shop for everything else
i want to end up as close to 500rwhp NA as i can, then throw a 150 shot on it
i know i will need forged everything to do this safe

if i got a callies comstar crank, comstar 6in forged rods, and mahle power pak pistons, would tht support what i want to do with the motor? and splayed 4 bolt caps.

i want an le3 top end, when he is done with the heads, how big are the chambers? most of the kits ive seen are about 11 to 1 with a 64cc head. thats the compression ratio i want, or about 11.5 to 1. wouldnt i be closer to a 58 cc head? are there pistons to give me the ratio i want or will i need custom pistons? and wheres the best place to buy all this stuff?

thanks guys!

 

What data do you have to suggest that recipe will get that result?

 

Hi, Well what kind of piston are you going to run and are you planning on that package to get you the 500 rwhp? I think that if your asking on here that you have not built very many engines and you many want to talk to someone who has the knowlage to exp everything to you.

First your better of money wise if you get a lt4 4 block main. this will save you the money it will cost to machine your 2 block. Its worth investing the money in that short block for many many reasons.

Next have all your parts as a working combo, cam and heads, piston and rods.

i would expect more than 500 for a 396. you can make that with a 383 and some good heads.

 

https://www.camaroz28.com/forums/sho...ghlight=engine

https://www.camaroz28.com/forums/sho...ghlight=engine

https://www.camaroz28.com/forums/sho...ghlight=engine

Some threads that might help...

 

You're going to use 6" rods on a 3.875" crank, giving you next to nothing in the way of compression height, and then you are going to spray a 150-shot on it? I don't think that would be a very good idea.

 

so what ive gathered is, theres not enough meat on the top of the piston with a 6in rod to spray a 150 shot? i figured i would be ok since its a pretty small shot... maybe not... i dont know much about this stuff, just started reading up on it. i see alot of guys making something like 450-460 with 383's and hydraulic cams, i figured 500 would be possible with a 396 running a big sr. deff. seems like im in over my head, thats why im asking you guys for help. so should i run the shorter 5.850 rods to use the nitrous? im taking it my goal is somewhat out of the question? thanks for all the help guys!

 

I went with the 396 with a 6 inch rod. I also spray 150 shot. Instead of the stock casting heads I went with the trick flow that have a larger chamber. My car is a full weight 94 camaro that runs mid 11s on motor and mid 10's on juice. I drive it 50 miles to the track also. It still has more left in it. Here is a link to my build: http://www.ellweinengines.com/ERE16/ERE16.htm and here is a link of me running a 10.52@129.9 http://www.mediafire.com/?lhymmmienxm
It can be done with good reliability with the right builder.

 

Have you looked at the 440+HR 383 setups closely? See any commonality, have you tried to incorporate those things?

Why do you think a 396 has to be so much better?

You are right a SR is going to come into play but maybe you don't understand just how much more those cost to run, lifters alone you will go from a $100 set of LS7s to a $500+ set of say Isky Red Zone.

IMO you combo will only hit 500rwhp in bench racing land. You need to instead choose parts that HAVE hit that goal.

 

rich, ever had that thing on the dyno? that i beautiful...

so should i go with the trickflows? is there that much of an advantage to them over the stock gm castings?

440+HR? not to sure what that is?

figured 450-460 is not uncommon with a 383 HR, so 396 should be maybe 13 horses more from the extra displacement(463-473), so i figured 500 wasnt out of the question with a bigger SR cam... and yes i know about cost and maintainance with a SR...

i know i most likely am in over my head, thats why i need help on his one..

i have most of the rest of the car sorted out, kinda built it from the back forward, i didnt wanna get a crazy engine in the car and blow the rest apart

so what parts are proven to hit my goals? 500 is kinda the magic number for me, but i would be ok if it fell more towards 475 ish,, which i knnow is not un reasonable...

 

Aleks' NA 355 LT1 - 480rwhp/419rwtq SAE - Aleks asked for a topend to transform his over-bore rebuild into a weapon and the numbers speak for themselves. With a much fatter torque curve than most strokers this is one hot 355. His setup consists of the same 200cc CNC LT1's & Street/Strip Ported LT1 Manifold Rick Abare uses to break records. With a very drivable solid roller setup this car is sure to get some attention prowling the streets & at the track. On its initial outing, inlet restricted to 450rwhp, this full weight M6 car with full accessories (A/C, Power Steering, stereo, subs, etc.) went 11.3X's @ 123.5in street trim. Updates as soon as Aleks dials in the tune & replaces the 12-bolt he mangled. Expect extremely low 11's at worst & over 400rwtq by 3500rpm


taken straight from AI's site. 480 in full street trim. i have no AS or PS, i kno thats not much power, but looking to my goal, every hp is one hp. i also have a s60 rear, which is supposed to have less power loss than the 12 bolt...
an it says with a very dirveable SR setup.
this leads me to believe it can be done on a 383 or 396, the extra displacement alone should do quite a bit, right? 28 or 41 extra cubes... starting to lean more towards 383 as the parts are more available, like the compstar/mahle kit on AI's site...

any imput? thanks guys!!

 

chevyrules85,
You sound a lot like me with that magic 500hp number.
I have had my car on the dyno and it only did 406 to the wheels N/A, I never sprayed it on the dyno. I was dissapointed! But I also know that an auto will dyno much different than a 6speed. I know that the car runs much stronger now that I have been playing with the tuning with help from guys on these boards. If it was a stick it probably would have dynoyed maybo 30-50 more hp.

If you haven't heard this before, try not to get caught up on dyno results! It took me a long time to not care about the dyno and care about track results. I have beat a couple of cars claiming 550hp, and a whole lot of trailered race cars.

Going with the trick flow vs ported stock castings the trickflows have a bigger combustion chamber and can be ported a little more than the stock castings.The bigger chamber will help with the added stroke of the 396, but the stock castings can be be worked to get some serious flow velocity and air through them. There will probably be very little HP difference between the 383 vs 396. The 396 will have a very small advantage in torque. From what I hear one of LT1's limiting factors is the intake but with enough money you can have a custom sheet metal intake to address that.
You have to aks yourself, what are your plans for the car (how fast you wanna run). Is it a daily driver, weekend warrior, or a stip car. How much you want to spend!!!! Let me tell you from experience 10 grand can go real quick in the engine alone. If you talk to Ron or Phill at AI or Lloy Elliot you cant go wrong, They know how to make LT1's run. Remember that the power comes from the heads/cam combo. Also remeber when someone says that their car is capable of daily driving that is all individual opinions. If you have any questions that I havent addressed just PM me. Also remeber you will get varying opinions on that 383 vs 396. I have the 396 and like it.

 

so if i do build a 396, would i be able to buy pistons that would keep my comp ratio where i want it? 11.5 or so to 1. with the stock heads? or would i need custom pistons? and how well would the pistons do with a 150 shot? would i be better off to build a 383 if i want to do the 150 shot? thanks guys

 

I think an Le3 top end (400whp minium for an le3 I think is "safe" to say) then throwing a 150 shot on there should easily net him 500whp. This including ALL supporting mods obviously.

EDIT: now that 96capricemgr has made me look like a moron (with my help) I shall now edit this post. To also ask the same question

There is a thousand ways to build an engine, he just needs some help building it correctly from what I see to do it safely.

 

Basically me question stands. "what data suggests this combo will get that result?"

Alex's car went on to make more power and go faster, it hit like 499rwhp SAE think it was up around 520STD

 

If he's doing that na with just 355 cubes why couldn't I? He's running similar to what I'm going to be running... AIs 200cc package Is similar to LEs le3 kit right? And a SR cAm... all kinds of similar stories on AIs site that come pretty close to these numbers...