383-350 Power differences.
Melting Slicks
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From: PITTSBURGH PA
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Re: (TreyZ28)
trey you are right but if you built the 383 identicle to the 355 the 383 will beat the snot out of it cubic inches still rule :cheers:
Melting Slicks
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From: S.L.C. UT
Re: (TreyZ28)
i dare claim this question to be invalid.
you stock a 350 top end a 383 (like many do) and you bound to find problems and vice versa. Aside from budget (want to use stock crank) and displacement limitations placed upon a class, i have to hear a valid argument against stroking an engine. I have asked many and found it tried and true. those who know, stroke. others tend to make silly generalizations such as "383s are torque monsters, they dont rev high" or "well by best friends bother in laws step sons girlfriends father ran 9's in a 355 and his friend ran 12s with his 383 so there"
you stock a 350 top end a 383 (like many do) and you bound to find problems and vice versa. Aside from budget (want to use stock crank) and displacement limitations placed upon a class, i have to hear a valid argument against stroking an engine. I have asked many and found it tried and true. those who know, stroke. others tend to make silly generalizations such as "383s are torque monsters, they dont rev high" or "well by best friends bother in laws step sons girlfriends father ran 9's in a 355 and his friend ran 12s with his 383 so there"
Thread Starter
Race Director
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From: Vancouver,Wa.
Re: (Kwik88)
Cork, Comparing 383 to 406. With whats is my setup, what difference would the cam that you and ski are running do in my motor? Setup in sig.
Gary
Gary
There has to be something wrong with your set up.. You MPH are the same as mine.
Drifting
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From: Colleyville Texas
Re: 383-350 Power differences. (Corvette0096)
The stroker motor is all about torque. Smaller cams in strokers will have more torque down low (under 3500 RPM) but will drop off quicker in both torque and HP than a larger cam-- 25-35 HP/TQ above 6000 RPM's.
The Comp Cams XE cams ramp up faster and with added fuel down low can get close to the low end torque RPM's of smaller cams.
The torque in a 396 at 2500 RPM's equals the torque in a similar modded 350 at 4500 RPM's. Common sense tells you whats going to happen at the track-- Your ET is going to be .5 quicker and the MPH 4-5 faster all things equal other than 350 versus 396.
The Comp Cams XE cams ramp up faster and with added fuel down low can get close to the low end torque RPM's of smaller cams.
The torque in a 396 at 2500 RPM's equals the torque in a similar modded 350 at 4500 RPM's. Common sense tells you whats going to happen at the track-- Your ET is going to be .5 quicker and the MPH 4-5 faster all things equal other than 350 versus 396.
Melting Slicks
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From: PITTSBURGH PA
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Re: (Kwik88)
Cork, Comparing 383 to 406. With whats is my setup, what difference would the cam that you and ski are running do in my motor? Setup in sig.
Gary
Gary
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Racer
Joined: Oct 2001
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From: Palos Hills IL
Re: (CORKVETTE1)
Cork, Comparing 383 to 406. With whats is my setup, what difference would the cam that you and ski are running do in my motor? Setup in sig.
Gary
kwik 88 it should make a whole lot more power i am working on a 383 just like that same setup and converting over to that solid roller and trying to get a little more air flow out of the heads and it should go bottem 11s or high 10s i am thinking the extra airflow on the heads makes up the hp difference between the 383 to 406 combo i am very excited about this setup :cheers:
Gary
kwik 88 it should make a whole lot more power i am working on a 383 just like that same setup and converting over to that solid roller and trying to get a little more air flow out of the heads and it should go bottem 11s or high 10s i am thinking the extra airflow on the heads makes up the hp difference between the 383 to 406 combo i am very excited about this setup :cheers:
Team Owner
Joined: Apr 2001
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From: Dallas TX
Re: 383-350 Power differences. (Jeff Hickman)
maybe 20hp/50tq...
Is this true? If so, why am I bothering building a 383. I thought it was more in the neighborhood of 35 hp or so.
Is this true? If so, why am I bothering building a 383. I thought it was more in the neighborhood of 35 hp or so.
[Modified by GlockLT4, 10:59 AM 11/8/2003]
Melting Slicks
Joined: Jan 2002
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Re: 383-350 Power differences. (GlockLT4)
well the thing is that a 383 shouldn't cost much more than a 355. a forged crank is the same cost for both. pistons are within $50, rods are rods.
a cast one- assuming you dont use your stock crank is the same deal, if you use your crank- a scat 9000 is $200 and from the sounds of you post- a great pick for you. Balance it will and I'd be damn hard pressed to see you break it short of 600hp/7000rpms.
The big thing IMHO wrong with this conversation is that you are comparing a build up for a 355 and sticking it in a 383. this is NOT correct. You do not build a 355 and then slap it into 383. Propper attention- at least to the cam should be given. Otherwise you could potentially end up with something that belongs in my silverado. There has even been some arguement as to head choices for a 355 vs 383. Some say LT1 castings are a very poor choice for a 383. others disagree.
on a side note, a 383 helps "tame" a cam a fair amound as well.
I guess my statement in a nutshell is that IMHO, a 355 in a 383 with all else equal- is not.
a cast one- assuming you dont use your stock crank is the same deal, if you use your crank- a scat 9000 is $200 and from the sounds of you post- a great pick for you. Balance it will and I'd be damn hard pressed to see you break it short of 600hp/7000rpms.
The big thing IMHO wrong with this conversation is that you are comparing a build up for a 355 and sticking it in a 383. this is NOT correct. You do not build a 355 and then slap it into 383. Propper attention- at least to the cam should be given. Otherwise you could potentially end up with something that belongs in my silverado. There has even been some arguement as to head choices for a 355 vs 383. Some say LT1 castings are a very poor choice for a 383. others disagree.
on a side note, a 383 helps "tame" a cam a fair amound as well.
I guess my statement in a nutshell is that IMHO, a 355 in a 383 with all else equal- is not.
Melting Slicks
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From: PITTSBURGH PA
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Re: (Kwik88)
Cork, Comparing 383 to 406. With whats is my setup, what difference would the cam that you and ski are running do in my motor? Setup in sig.
Gary
kwik 88 it should make a whole lot more power i am working on a 383 just like that same setup and converting over to that solid roller and trying to get a little more air flow out of the heads and it should go bottem 11s or high 10s i am thinking the extra airflow on the heads makes up the hp difference between the 383 to 406 combo i am very excited about this setup :cheers:
Cork, what did you et on that mph?
Gary
kwik 88 it should make a whole lot more power i am working on a 383 just like that same setup and converting over to that solid roller and trying to get a little more air flow out of the heads and it should go bottem 11s or high 10s i am thinking the extra airflow on the heads makes up the hp difference between the 383 to 406 combo i am very excited about this setup :cheers:
Cork, what did you et on that mph?
Racer
Joined: Oct 2001
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From: Palos Hills IL
Re: (CORKVETTE1)
Cork, Sorry, I misred your post. I thought you said you had run the same mph that I had, 113. My screwup. If I went from the 219 cam to the 242 cam, do you think the car would fall on its face down low to much to pickup that power up higher in the rpm range? One other question, do you know how the AFR 190 reacts to porting work? AFR claims they'll support 550 hp out of the box. I like the prospect of more hp, but I sure like the torque this thing puts out now.
Melting Slicks
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From: PITTSBURGH PA
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Re: (Kwik88)
it would make more power down low and up stairs watch on trying to port those heads if you go to big you will lose velocity try and keep it no larger than 205 cc max on your setup :cheers:
Le Mans Master
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From: South Carolina
St. Jude Donor '03 & '05
Re: (Kwik88)
Another thing to look at is the track you are running at. I took My car from Rockingham NC, to Hawaii and went 3-5mph slower, and the ET dropped around 6 tenths.
I have a 396 with HOT CAM, and I pulled 11.9 at 117.56mph. I used ET Streets, and have an automatic with Vigilante converter.
What I am getting at is unless drivleine, track, etc etc are the same, there will be a difference in HP/TQ and ET mph that is invalid.
If you did run the same car with everything being equal, except 350 vs 383, the 383 will put out more HP and TQ. My 396 puts 400rwhp and 428 ft/lbs TQ at the rear wheels. Compare that to a long tubes 350 with automatic and 350/Hot Cam combo, and you will see a difference. My 2 cents
I have a 396 with HOT CAM, and I pulled 11.9 at 117.56mph. I used ET Streets, and have an automatic with Vigilante converter.
What I am getting at is unless drivleine, track, etc etc are the same, there will be a difference in HP/TQ and ET mph that is invalid.
If you did run the same car with everything being equal, except 350 vs 383, the 383 will put out more HP and TQ. My 396 puts 400rwhp and 428 ft/lbs TQ at the rear wheels. Compare that to a long tubes 350 with automatic and 350/Hot Cam combo, and you will see a difference. My 2 cents
Burning Brakes
Joined: Aug 2003
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From: Mesa Az
Re: (scorp508)
Forget peak #s. More total area under the curve in a 383. :yesnod:
Torque is a measure of force, total area under curve is the key to a 383 - with respect to a 350. also, RPM range is consideration also. if through the quarter your RPM range is only 4500-6000 you'll want the combo with most torque in that range. also, consider do you have a 6M and can selectively control your rpm to your mph. I dont a M and have an automatic and the car just kind of chooses which one it feels like and all the gears are kind of long, hence i go with a choice that gives a wide flat torque curve to make best use of trans and rearend gearing....
however, i dont just drive in quarter mile straights, i like the 383 for just daily driving too. (read - tire frying torque!!!) and i am always at my "passing" rpm range.
[Modified by mistaben, 9:18 PM 11/9/2003]
