383 question
383 question looking at building a 383 stroker, I do not want a loping muscle car that stalls and will produce over 400ft/lbs of torque low end, that will destroy my transaxle.
I am looking to install this engine in my 944, the ls1 already was running but found out I had a bad set of pistons and bad block.
I have a set of rebuilt ls6 heads with dual springs and want the engine to be smooth and have a good highway power to fuel the speed the car can make.
any advice, I figure the idle is related to the cam, so I just want to know the facts if its possible to have a smooth running 383 and not a rough loping engine.
I am looking to install this engine in my 944, the ls1 already was running but found out I had a bad set of pistons and bad block.
I have a set of rebuilt ls6 heads with dual springs and want the engine to be smooth and have a good highway power to fuel the speed the car can make.
any advice, I figure the idle is related to the cam, so I just want to know the facts if its possible to have a smooth running 383 and not a rough loping engine.
TECH Resident
Joined: Jan 2009
Posts: 873
Likes: 1
From: oakland, ca
yes that is posible..the cam is usualy the reason for the choppy idle, but sometimes a **** tune is the reason.you can still make good power with a 383 and something in a 228 range on the cam.goodluck
I have a 383 and the cam I'm using is very mild, as this is my daily driver. The cam is a custom Comp Cams, with 224 intake, 230 exhaust, with a little over .600 lift. It's on a 114 so the idle is pretty smooth. I've never had an issue with stalling, surging, etc. Perfect cam, but a lot of that is in the proper tune. Credit for that goes to Mike at G-Force. Good luck.
thanks for the info. With the increased CI I will get increase power correct? so even if I am running a smooth idle I should get more power especially running ls6 heads with comp dual springs.
One other question, What is the top end rpm that a 383 stroker can hit? I dont want to drop below 6500.
One other question, What is the top end rpm that a 383 stroker can hit? I dont want to drop below 6500.
thanks for the info. With the increased CI I will get increase power correct? so even if I am running a smooth idle I should get more power especially running ls6 heads with comp dual springs.
One other question, What is the top end rpm that a 383 stroker can hit? I dont want to drop below 6500.
One other question, What is the top end rpm that a 383 stroker can hit? I dont want to drop below 6500.
Kool, I am running ceramic coated custom headers and a 91mm TB with LS6 intake and LS6 heads.
This is all inside my 86 944 turbo/951 porsche. So that will be about the limit of the transaxle as far a torque goes. It will be sick once I get it together
This is all inside my 86 944 turbo/951 porsche. So that will be about the limit of the transaxle as far a torque goes. It will be sick once I get it together
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It'll be fun for sure
Just don't break that transaxle. You can buy a 4th gen F-body for the cost of that thing
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Verdad Gallardo I am still doing research. The guy I am looking at buying this from said the setup is for a 3.905 cylinder. So what exactly is the stock bore of an LS1?
I am new to engine building so this is my first engine and I just want to make sure i do it right.
I am new to engine building so this is my first engine and I just want to make sure i do it right.
On The Tree
Joined: Feb 2009
Posts: 135
Likes: 0
If you are looking for top end power why go stroker at all? You could do a forged stock stroke setup and spin it up a lil harder and make the same power while being easier on your trans axle. A shorter stroke at high rpm will be more reliable as well because you wont have to move the pistons as fast. Choppy idle and high rpm power is going to be a conflict of interest for an off the shelf cam, call up one of the sponsors on this site about a custom grind that will make power up top with minimal lope.
3.898". The 3.905" set-up assumes a hone to the cylinders. LS1 blocks do not get bored. Contact a good local machinist to prep your block. Best to bring the pistons and rings to him and hone to match perfectly.
This is my first true engine build, so I am open to any advice that is given.
I know true sports cars displace rotating mass by smaller ci with more pistons. I really want a smooth idling highway monster. I hope to rev out to 7k or just above. Is the rotating mass of a 383 stroker offset so much that this can not be done?
also I was under the impression if I went this route I can get a cam that would move my torque curve up to 2-3k and all for more power top end.
I look at the CI and see that bigger is not always better but it brings more power possibility to the engine.
what do I need for a smooth idling drive able, highway car that can spin to 7k and not have issues?
I know true sports cars displace rotating mass by smaller ci with more pistons. I really want a smooth idling highway monster. I hope to rev out to 7k or just above. Is the rotating mass of a 383 stroker offset so much that this can not be done?
also I was under the impression if I went this route I can get a cam that would move my torque curve up to 2-3k and all for more power top end.
I look at the CI and see that bigger is not always better but it brings more power possibility to the engine.
what do I need for a smooth idling drive able, highway car that can spin to 7k and not have issues?
So looking at the 383 might not be the best idea for me since the torque is increased over the hp.
Diving further into getting forged and balanced stock sized internals, is it possible and what would be needed to spin the rpm to 7k redline, with a power band up to 6500-7000 area.
I already have ls6 heads with dual comp springs, that seat at 150 or so. their
#26921 comp cams.
I dont have any other upgraded parts anywhere else.
Diving further into getting forged and balanced stock sized internals, is it possible and what would be needed to spin the rpm to 7k redline, with a power band up to 6500-7000 area.
I already have ls6 heads with dual comp springs, that seat at 150 or so. their
#26921 comp cams.
I dont have any other upgraded parts anywhere else.
FormerVendor
Joined: Nov 2001
Posts: 3,065
Likes: 6
From: Houston, Tx.
So looking at the 383 might not be the best idea for me since the torque is increased over the hp.
Diving further into getting forged and balanced stock sized internals, is it possible and what would be needed to spin the rpm to 7k redline, with a power band up to 6500-7000 area.
I already have ls6 heads with dual comp springs, that seat at 150 or so. their
#26921 comp cams.
I dont have any other upgraded parts anywhere else.
Diving further into getting forged and balanced stock sized internals, is it possible and what would be needed to spin the rpm to 7k redline, with a power band up to 6500-7000 area.
I already have ls6 heads with dual comp springs, that seat at 150 or so. their
#26921 comp cams.
I dont have any other upgraded parts anywhere else.
