Ok Ive been wanting to build a stroker motor for some time now and I have been doing a lot of reading and trying to find everything out I can useing the search. At first I wanted to build a 396 but it seems like a 383 would be the better one to build because you dont really get to much power more with a 396 and you run into a lot of things that has to be changed when building a 396, so I think Im just going to go with the 383. Ok I do have a couple questions though that Im not sure about. My heads are already built for my last motor so is there anyway I can use them with this motor? Of course I want to run a larger camshaft so Ill get larger valve springs and get more port work done if I need to, So who makes a good custom cam that I can talk to about getting one made? But I have 2.02/1.6 valves do yall think these will be large enough for a 383? Ok clearancing, I know the block has to be clearanced, but can you use the stock oil pan on a 383 or will I have to buy an aftermarket one for a 383 as well? Now for my last question. I know the site where Im going to order my kit from, its all eagle and I know I want to run 3.750 stroke and a 6.000 rod but Im not sure about pistons, Ill be spraying this motor so if yall would give me a hand on which cc piston would be the best to use. Heres the link at the bottom to see the site theres 383's on this page and the next page so make sure you check both pages out.

http://www.cnc-motorsports.com/categ...ion=0&PageNo=2

 

You will want to know what the heads flow exactly so someone can put together a custom cam. The stock oil pan will fit. Just dont run a high volume oil pump with it. Stock castings are good that is what im going with just dont expect to make peak HP past 6100rpm with ported Lt1s for the cross sectional area is too small to feed the big gulps of air the motor will need. I know cmotorsports.com does custom cams but i would look more into like Joe overton cams if it were me.

Good luck

cal

 

thats not such an easy question to answer. when you build an engine, you do the whole thing to match what you are doing.

What will the car be used for, are you adverse to running 50/50 race gas, do you mind lope?

Basically spend as much money as you can on heads. I would suggest going LE for the heads and cams. If you dont go LE, have your head work done, then have someone design your cam based on you needs for nitrous and the performance of the heads.

The top end is where the power is, the bottom end is really nothing more than an air pump. Its all about velocity.

With the oil pan, why fight it. I tried to modify mine and felt like killing someone. This is going to be worse for you as you will be running 6" rods, I ran 5.7s. I am in love with my canton pan, almost my favorite part of the whole deal.

So in conclusion, spend money on a good head / cam and worry about the bottom end when you get your ducks in a line.

 

It will be mostly a wkend cruiser but I will drive it some during the week also. It wont be a drag strip car all the time mainly a street car. As for cam. I love lope. I want the biggest cam possible for a street car. I really dont want to always get race gas, if its possible Id like to just run 93. Would it be better running a shorter rod? Is there any power difference, also would that effect nitrous any? Whenever I take my heads back to the machine shop to get more port work they are going to ask me for specs on my cam, what do I tell them since Im going to have to get a custom one made? How do I know how much to get ported? And can I run a High Volume Pump if I run aftermarket oil pan? And what do you mean will power start to drop after 6100rpms?

 

A cam is made to fit a engine and ALL of it's parts not just the heads. The last thing you get is the cam.

Bret

 

The last sentence should be a sticky thread in itself.

 

Ok then just build the actual shortblock and get how ever much port work done and then just get the flow numbers and then get the cam made for the numbers, and I still need to know who to talk to, about making the actual camshaft. Ok so what about clearancing issues with block, rods and oil pan? If I get a aftermarket oil pan Ill be able to run a high volume oil pump right?

 

I'm sure some guys on here will give you some ideas on WHO to talk to about the cam.

The heads should be ported to match the bottom end.... a stock LT1 casting is never going to get big enough to worry about it being too big on stroker.

If you run H beams a aftermarket pan is probably needed.

You might want to do a search on HV pumps.... you don't really need one.

Bret

 

Well one day it might be a good idea to do that!

 

What will the 6.0 rods do compared to the 5.7? will there be more power produced from the 6.0?

 

Lighten up the piston, change the wear on the bores and effect how the cylinder sees the head port.

Lots of discussions on rod length around here. Good topic to put into the search function.

Bret

 

Probable, but not always the case. My stocker worked with a little 'persuasion'.

 

Heres a really good link for anyone that wants to read up on info about rod length. It really helped me out a lot..

http://web.camaross.com/forums/showt...ing+Rod+Length

And heres one about oil pumps. So if I just go buy a stock pump from GM then I should be find with the PSI for this motor.

http://web.camaross.com/forums/showt...gh+Volume+Pump

But I do have another question and Im not sure what piston to run with those kits? Im not sure but doesn't it matter on how much my heads are milled? Correct me if Im wrong but you make more power with a higher compression ration correct? Also Ill be spraying this motor so Im sure that makes a difference in which to run..

 

bump

 

anyone else?