383 Vs 355
01-20-2008, 02:58 PM
#23
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Yea right now i have a 383 but its all fucked up and i don't have a big amount of money to spend and i got told with a 383 they are nothing but problems if u have a big big check book then go with a 383 but if u don't have a lot of money they told me go with a 355. Okay i only want to spend 3,000 dollars on everything. so if anyone can find good parts for 3,000 dollars tell me. cause im not having any luck. And with searching on this sight im kinda new i really don't spend much time on here. So its kinda confusing to me. So plz help.
01-20-2008, 03:41 PM
#24
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I reccomended to him that he do the 355 kit and a hotcam kit just because of the simplicity of it. The car will still make decent power to be a strictly DD car. He doesn't have a lot of time, lot of LT1 knowledge, and he isn't doing any of the work himself so I reccomended it to him as something quick, easy, cheap, and proven.
01-20-2008, 04:43 PM
#26
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Yes, sounds like you may want to just hunt around for a "running" used LT-1 to buy and pay someone to do the motor swap for you.
On another note, a 383 if properly assembled, will not be "nothing but problems" and certainly doesn't require a person to "have a big checkbook". Any engine build requires a careful selection of the correct parts, quality engine machining and knowledge to properly assemble the engine. Without one or more of these, you will probably end up with an engine that is all f***ed up.
On another note, a 383 if properly assembled, will not be "nothing but problems" and certainly doesn't require a person to "have a big checkbook". Any engine build requires a careful selection of the correct parts, quality engine machining and knowledge to properly assemble the engine. Without one or more of these, you will probably end up with an engine that is all f***ed up.
01-20-2008, 05:10 PM
#27
Hum just do a stock rebuild and a head n cam...You can hit 400whp with that
I have a freind that likes to build races cars with no time and money and they never get done or run....
Build withn you means....and 383s have no problems at all stay the **** away from who ever is telling you this, they have no idea what they are doing...
And if your tight, just do a stock rebuild with a CUSTOM CAM to fit you needs and it will still be fast...Dont drain you self for no reason man
I have a freind that likes to build races cars with no time and money and they never get done or run....
Build withn you means....and 383s have no problems at all stay the **** away from who ever is telling you this, they have no idea what they are doing...
And if your tight, just do a stock rebuild with a CUSTOM CAM to fit you needs and it will still be fast...Dont drain you self for no reason man
01-20-2008, 05:11 PM
#28
I reccomended to him that he do the 355 kit and a hotcam kit just because of the simplicity of it. The car will still make decent power to be a strictly DD car. He doesn't have a lot of time, lot of LT1 knowledge, and he isn't doing any of the work himself so I reccomended it to him as something quick, easy, cheap, and proven.
For the money the kit is alright, and the hot is so so, its kinda over done and over talked about...
Now parts are cheaper than they used to be, so the hot cam isnt really a big deal
01-20-2008, 08:56 PM
#32
Here is my 2 cents, FLAME SUIT now on.
Many people who have V8 powered daily drivers are very concerned with MPG, I just paid 3.49 a gallon (premium) to fill up my Z28. Many guys however are not obsessed enough to go V6 or Honda Civic, they just want to build a new engine with some compromise in mind. What is wrong with that?
With gas expected to approach $4.00 a gallon, many of the folks who say screw gas mileage are going to have a change of heart, and some will continue to say screw the gas mileage.
You need to ask yourself if MPG is important and build around that. You need to have a realistic goal in mind for the power you are wanting. You need to have an idea of what your budget is.
Bottom line a 383 will have worse gas mileage compared to the 355 due to more displacement, what the exact difference is hard to calculate. The 383 will make more torque across the curve compared to the 355. The ironic thing is the two motors normally make about the same HP but the 355 has to rev higher to accomplish this.
IMHO the thing that sends gas mileage straight to hell is the size and aggressiveness of the camshaft and rear ring & pinion ratio. Also driving style comes into play, who would of thunk that.
The 355 is going to be cheaper to do cause you can reuse your crank and port your stock heads. Many people believe that to build a good 383 you have to use aftermarket heads like AFR or LT4 to get get flow. Heavily ported stock LT1 heads are on the thin line for being "big" enough to feed a hungry 383. Keep this in mind, these heads ain't cheap.
I do care to some degree about MPG purely from an economical point of view, thats why I chose the setup shown in my signiture. Guess I am not "hardcore man enough" to say screw the MPG's. There has been a very noticable impact to the mileage I get with my new engine compared to the stock LT1 and stock gears, I am glad its not any worse.
Many people who have V8 powered daily drivers are very concerned with MPG, I just paid 3.49 a gallon (premium) to fill up my Z28. Many guys however are not obsessed enough to go V6 or Honda Civic, they just want to build a new engine with some compromise in mind. What is wrong with that?
With gas expected to approach $4.00 a gallon, many of the folks who say screw gas mileage are going to have a change of heart, and some will continue to say screw the gas mileage.
You need to ask yourself if MPG is important and build around that. You need to have a realistic goal in mind for the power you are wanting. You need to have an idea of what your budget is.
Bottom line a 383 will have worse gas mileage compared to the 355 due to more displacement, what the exact difference is hard to calculate. The 383 will make more torque across the curve compared to the 355. The ironic thing is the two motors normally make about the same HP but the 355 has to rev higher to accomplish this.
IMHO the thing that sends gas mileage straight to hell is the size and aggressiveness of the camshaft and rear ring & pinion ratio. Also driving style comes into play, who would of thunk that.
The 355 is going to be cheaper to do cause you can reuse your crank and port your stock heads. Many people believe that to build a good 383 you have to use aftermarket heads like AFR or LT4 to get get flow. Heavily ported stock LT1 heads are on the thin line for being "big" enough to feed a hungry 383. Keep this in mind, these heads ain't cheap.
I do care to some degree about MPG purely from an economical point of view, thats why I chose the setup shown in my signiture. Guess I am not "hardcore man enough" to say screw the MPG's. There has been a very noticable impact to the mileage I get with my new engine compared to the stock LT1 and stock gears, I am glad its not any worse.
Last edited by wrd1972; 01-20-2008 at 09:46 PM.
01-20-2008, 09:26 PM
#34
Honeslty, if I did this for a daily driver id go with a 355 with somthing like a normal LT4 camshaft with 1.6 rockers or 1.7........And leave the heads stock..
It will sound stock and still have good mpg, yet still add more power...
And I own a 03 V6 sebring and that thing to me isnt all that great on gas...let along a 5.7 LT1
It will sound stock and still have good mpg, yet still add more power...
And I own a 03 V6 sebring and that thing to me isnt all that great on gas...let along a 5.7 LT1
01-20-2008, 09:39 PM
#35
Honeslty, if I did this for a daily driver id go with a 355 with somthing like a normal LT4 camshaft with 1.6 rockers or 1.7........And leave the heads stock..
It will sound stock and still have good mpg, yet still add more power...
And I own a 03 V6 sebring and that thing to me isnt all that great on gas...let along a 5.7 LT1
It will sound stock and still have good mpg, yet still add more power...
And I own a 03 V6 sebring and that thing to me isnt all that great on gas...let along a 5.7 LT1
01-20-2008, 09:50 PM
#37
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heres a soundclip..
it was running a tad lean, now its louder with the new injectors and tune.. it has more of a deep note, as opposed to a raspy note like the one above
it was running a tad lean, now its louder with the new injectors and tune.. it has more of a deep note, as opposed to a raspy note like the one above
01-20-2008, 09:52 PM
#38
I will guess you will be around 360-370 RWHP with ported heads and all bolt-ons plus a very good LT headered exhaust. The extra 5 cubic inches makes no measurable power.
Maybe I am wrong, take it to the dyno.
