Small Block Engine Q's
Thread Starter
TECH Fanatic
Joined: Jul 2006
Posts: 1,179
Likes: 0
From: North Bay, Ontario
Small Block Engine Q's Hey guys i come from the LS world currently owning a C6 Z06 and i just bought a 69 camaro and looking to do a 383 stroker to the current 350 thats in there but i have a few questions, the car is strictly street weekend warrior want a nice lope at idle and want a healthy amount of power:
1. What eagle rotating assembly should i buy (what dish pistons?)
2. Should the rotating assembly be internally or externally balanced?
3. What cam is good for street but sounds nasty and makes decent power?
4. Should the block be decked? (If so to what height)
5. For a cam swap what needs to be changed? (rockers, springs, pushrods, lifters?)
6. What comp ratio is good for street on 91 octane?
7. Should anything be done to heads?
Don't want to spend a ton of money as this will be a temporary street motor while i track down and build an LQ4 stroker or an older BBC.
Thanks
1. What eagle rotating assembly should i buy (what dish pistons?)
2. Should the rotating assembly be internally or externally balanced?
3. What cam is good for street but sounds nasty and makes decent power?
4. Should the block be decked? (If so to what height)
5. For a cam swap what needs to be changed? (rockers, springs, pushrods, lifters?)
6. What comp ratio is good for street on 91 octane?
7. Should anything be done to heads?
Don't want to spend a ton of money as this will be a temporary street motor while i track down and build an LQ4 stroker or an older BBC.
Thanks
How much are you looking to spend? My bottom end cost me $3500, and thats just the bottom end!
#1 For a street car, forged flat top pistons
#2 I would internally balance the engine
#3 what do you want more? Power or sound, you pretty much have to chose or get a cam that meets in the middle, but bad nasty lope will kill performance to a certain point.
#4 Depends what compression you want
#5 Depends on cam, roller cam will need different parts. (can get expensive)
#6 I wouldnt get over 10:1 compression, even then you may want 93 octane
#7 What heads are on it? know the flow numbers on the heads?
If you are going to just pull this engine out soon I wouldnt bother with it, because you can spend serious money trying to make a "decent" stroker engine
#1 For a street car, forged flat top pistons
#2 I would internally balance the engine
#3 what do you want more? Power or sound, you pretty much have to chose or get a cam that meets in the middle, but bad nasty lope will kill performance to a certain point.
#4 Depends what compression you want
#5 Depends on cam, roller cam will need different parts. (can get expensive)
#6 I wouldnt get over 10:1 compression, even then you may want 93 octane
#7 What heads are on it? know the flow numbers on the heads?
If you are going to just pull this engine out soon I wouldnt bother with it, because you can spend serious money trying to make a "decent" stroker engine
Or put a big block in it. Just bought one out of a boat, dual quad 4 bolt 454, rectangular port heads, forged crank and so on. Complete engine from air cleaner to pan, starter, distributor and even the coil for $3,500. Guy pulled it because the cam went flat, cleaned it up, put in a new cam and lifters and gave up on the boat. While I was looking I found a complete running 80s' Camaro, big block with Aluminum heads and a 5 speed for $5,000. It was kind of rough but had a new fiberglass 4" cowl hood.
Al 95 Z28
Al 95 Z28
If I were building a 383, I would do the following:
1. 4340 forged steel internally balanced crank, 4340 forged h-beam rods
2. forged flat top piston, with valve reliefs
3. http://www.empirenet.com/pkelley2/DynamicCR.html use the the calculator that be downloaded at the bottom of the page to help with camshaft selection. Dynamic compression is very important. For a carbed street motor that will run well in 100 degree summer temps on pump gas, I would keep this to about 8.25:1. This is not to be confused with static compression. I would run a hydraulic roller camshaft. More power, and no maintenance.
4. I would deck the block and I would also have the mains align bored.
5. changing the cam, I would replace all of the parts that go with it, your tearing the engine completely apart anyway.
6. static compression really doesn't matter. It could be 15:1 and have 8:1 dynamic. Shoot for a maximum of 8:25:1 compression for 91 octane. I would also go with a 1 3/4" header and at least a 2.5" dual exhaust, preferably 3".
7. What kind of heads are on it? I've got AFR 195 eliminators on my 406 and they are awesome for the street. I would recommend a performer RPM air gap intake too, as well as a mechanical secondary 750 carb.
1. 4340 forged steel internally balanced crank, 4340 forged h-beam rods
2. forged flat top piston, with valve reliefs
3. http://www.empirenet.com/pkelley2/DynamicCR.html use the the calculator that be downloaded at the bottom of the page to help with camshaft selection. Dynamic compression is very important. For a carbed street motor that will run well in 100 degree summer temps on pump gas, I would keep this to about 8.25:1. This is not to be confused with static compression. I would run a hydraulic roller camshaft. More power, and no maintenance.
4. I would deck the block and I would also have the mains align bored.
5. changing the cam, I would replace all of the parts that go with it, your tearing the engine completely apart anyway.
6. static compression really doesn't matter. It could be 15:1 and have 8:1 dynamic. Shoot for a maximum of 8:25:1 compression for 91 octane. I would also go with a 1 3/4" header and at least a 2.5" dual exhaust, preferably 3".
7. What kind of heads are on it? I've got AFR 195 eliminators on my 406 and they are awesome for the street. I would recommend a performer RPM air gap intake too, as well as a mechanical secondary 750 carb.
Trending Topics
LS1 Tech Stories
The Best V8 Stories One Small Block at Time
6 Common C5 Corvette Failures and What's Involved In Repairing Them
Pouria Savadkouei
Retro Modern Bandit Pontiac Trans AM Comes With Burt Reynolds' Autograph
Verdad Gallardo
Top 10 Greatest Cadillac V Series Performance Models Ever, Ranked
Pouria Savadkouei
Top 10 Most Powerful Chevy Trucks Ever Made!
Hennessey's New Supercharged Silverado ZR2 Has 700 HP
Verdad Gallardo
Coachbuilt N2A Anteros Is an LS2-Powered C6 Corvette In Italian Clothes
Verdad Gallardo
Awesome K5 Blazer Restomod Comes With C7 Corvette Power
Verdad Gallardo
10 Camaros You Should Never Buy
10 LS Engine Myths That Refuse to Die
Verdad Gallardo Al 95 Z28
build wat you want to build dotn do wat others are telling you to do..
as for price i thinking your looking at for a decent 383 6500 and teh price goes down depending on wat you choose to use
as for price i thinking your looking at for a decent 383 6500 and teh price goes down depending on wat you choose to use
Thread Starter
TECH Fanatic
Joined: Jul 2006
Posts: 1,179
Likes: 0
From: North Bay, Ontario
okay so I've decided to ditch the LS engine for the camaro and just going to stick with a mild 383 for now i have a spare 350 so it won't cost much. Now question
1. WIll i have vibrations with this eagle kit because of external balance and my car has a manual trans (http://www.jegs.com/i/Eagle/356/B130...oductId=749647)
2. Will the OEM flywheel work with this without vibration or do i need a special one?
3. Is the eagle Rotating assembly above good enough for my application? (weekend cruiser want it to sound good and have nice amount of torque and reliable)
Thanks!
1. WIll i have vibrations with this eagle kit because of external balance and my car has a manual trans (http://www.jegs.com/i/Eagle/356/B130...oductId=749647)
2. Will the OEM flywheel work with this without vibration or do i need a special one?
3. Is the eagle Rotating assembly above good enough for my application? (weekend cruiser want it to sound good and have nice amount of torque and reliable)
Thanks!
I would go with an OHIO Crank rotating assy.:
http://www.ohiocrank.com/chevsb_rotate.html
These guys are easy to talk to and will provide everything you need. And they sell direct to you, not some speed shop/store.
http://www.ohiocrank.com/chevsb_rotate.html
These guys are easy to talk to and will provide everything you need. And they sell direct to you, not some speed shop/store.
Thread Starter
TECH Fanatic
Joined: Jul 2006
Posts: 1,179
Likes: 0
From: North Bay, Ontario
call comp cams today to see what i needed for a cam change. The heads are the 193 castings he said to put in 26-915-16 springs. but when i go on comps website it says these are for LS motors. Confused :S
