383 stroker only put down........320 rwhp & 369 rwt why??
11-02-2006, 03:53 PM
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383 stroker only put down........320 rwhp & 369 rwt why?? so we got the car back to the dyno and it was a dyno jet and it only put down 320 rwh and 369 rwt the heads were ported and so was the intake, it also has a hotcam in it. however the motor is at 9:5:1 what do you guys think about this, and what can we do to make the car hit 400 wrt and hp to the tires?? I know we dont want to put the gm847 in it because we will have to do valve changing to the heads so we dont have piston slap....advice needed on a better cam then hotcam and how to make this 383 put out more!
P.s this was though no cats and a dual cut outs qtp 3" exhaust with headers and an intake k&n system
P.s this was though no cats and a dual cut outs qtp 3" exhaust with headers and an intake k&n system
Last edited by TondSS; 11-02-2006 at 03:59 PM.
11-02-2006, 04:00 PM
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they guy that built it made it that low to make it safe, so now he has to take the motor apart and put new pistons any suggestions....maybe we need new pistons and a nasty cam ...as for the valves i think there 2.02 and 1.60s or so i can call and ask....
11-02-2006, 04:16 PM
#5
Because you have a SHITTY Cam
And Crappy heads thats why
Your need some Healthy ported stock heads or really good after markets done right.
I would never put a Off the shelf cam 847 cam into a Stroker motor. Thats me, Im sorry to be so blunt.
And Crappy heads thats why
Your need some Healthy ported stock heads or really good after markets done right.
I would never put a Off the shelf cam 847 cam into a Stroker motor. Thats me, Im sorry to be so blunt.
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11-02-2006, 04:44 PM
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the guy that built it , wants to see if there is anything wrong with the motor so he is going to take it apart in the process he is going to make the compression 11:5:1 with a nasty cam...i need your guys help on a good cam chioce. doing reseace it seems like the lt1 motor dont like to go over 560 to 570 lift ..... what do we need cc505,cc306,gm847 or other?? it seems like all the other 383 guys are putting the same numbers with a baby cam......question with the lt1s transmissions, what is the average loss betweet a t56 to a 4l60 and would a bigger stall help any?
11-02-2006, 04:50 PM
#10
Originally Posted by TondSS
the guy that built it , wants to see if there is anything wrong with the motor so he is going to take it apart in the process he is going to make the compression 11:5:1 with a nasty cam...i need your guys help on a good cam chioce. doing reseace it seems like the lt1 motor dont like to go over 560 to 570 lift ..... what do we need cc505,cc306,gm847 or other?? it seems like all the other 383 guys are putting the same numbers with a baby cam......question with the lt1s transmissions, what is the average loss betweet a t56 to a 4l60 and would a bigger stall help any?
Thats what follow the leader LT1 guys like to do thats why there Junk cars are in the barly in the 12s, everyone uses shitty off the shelf crap cams.
First of all you have to Pick the Heads with the Cam!
What kind of heads? What are they flowing? Were do you want power to be made? How much power do you want?
I would go with a Custom Ground cam for you motors specs its not much more, As you can see the motor isnt making power because ITS NOT SETUP RIGHT.
You need more compression for NA power, like somone just said a Blower setup might be cheaper than taking the motor apart etc
So do it right this time around and save your self the time and the money.
Alot of Stock bottom end LT1s with really good Heads N Cam and making 400whp plus
11-02-2006, 04:58 PM
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i dont know how you feel about spray but you have a pretty nasty motor for it. with a 9.5:1 compression ratio you could spray the hell out of that motor. if you get in touch with one of the companies they can help you come up with some specs specifically for you. with the right cam you could keep your current compression ratio and have a nasty *** nitrous motor.
11-02-2006, 05:30 PM
#15
n2o doesnt creat boost, i.e. volumetric eff doesnt exceed 100% hence you dont have to worry about comp, more like fuel and spark.
I had a hotcammed 383. I have emissions and I cant cheat. I still made 380 rwhp with a a4, 2000 stall and stock rear. All bolt ons and 11.25 comp.
I would just get a blower, and stick it on with a better cam, better then pulling the whole motor for a tear down....
I had a hotcammed 383. I have emissions and I cant cheat. I still made 380 rwhp with a a4, 2000 stall and stock rear. All bolt ons and 11.25 comp.
I would just get a blower, and stick it on with a better cam, better then pulling the whole motor for a tear down....
11-02-2006, 05:36 PM
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i can tell you the intenstions were for spray.....we were looking at the cc503 cam and flat top pistons about 5 in the hole, 2 valve relief with a 32thousands gaskits. would make it 11:5:1 to 12:1.... we can go the custom route but we wanted to go with a cam that has produced good numbers.....with doing research, it looks like other cars that are 383s were putting the same power as ours.....looking for power up to 6200 rpms with mid and high range drag racing power. head specs are 256 on the intake and 223 on the exhaust
11-02-2006, 05:41 PM
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dont shy away from shelf cams. im almost in the 10's n/a with a stock LT1 and a 230/236 cam.
if you can spring for it, swap the cam for something bigger, and put a supercharger on the car. dont mess with the shortblock.
if you can spring for it, swap the cam for something bigger, and put a supercharger on the car. dont mess with the shortblock.
11-02-2006, 05:51 PM
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hugh... I only made 322 and 368... maybe you should take it down a track before you decide there is something wrong with it 
just a thought... dyno's dont tell you how fast your car is.
compression and better cam would definatly help the #'s though
just a thought... dyno's dont tell you how fast your car is. compression and better cam would definatly help the #'s though
11-02-2006, 06:35 PM
#20
First, I would not get too bogged down in dyno numbers...Granted the Hot cam is small and 9.5:1 compression is low...All things considered, the numbers are not too bad...Imho your research is on the money with guys like Joe Overton and Eric Bradby...As a general statement LT1 castings do not respond well with lifts over .570" with an N/A build...This is why Joe spec'd me a cam that lifts to .568"...The cam should definitely match the head flow and I think Joe knows a bit of what he's talking about...
I would look at something in the 11:1 range, get the heads ported with the bigger 2.00/1.56s and go custom on the cam based on head flow...I love it when people say to throw in a big and nasty cam...Makes me laugh because most of the time its way too much cam for the heads, gear, converter...It has a great "rumpity-rump", pulls big dyno numbers at 7000 rpm and is a complete dog to drive...My car makes 385-400rwhp depending on what dyno you believe...The track tells the story, the dyno does the tuning...nothing else...Good luck with the build and have fun...Remember the devil is in the details...
--Alan
I would look at something in the 11:1 range, get the heads ported with the bigger 2.00/1.56s and go custom on the cam based on head flow...I love it when people say to throw in a big and nasty cam...Makes me laugh because most of the time its way too much cam for the heads, gear, converter...It has a great "rumpity-rump", pulls big dyno numbers at 7000 rpm and is a complete dog to drive...My car makes 385-400rwhp depending on what dyno you believe...The track tells the story, the dyno does the tuning...nothing else...Good luck with the build and have fun...Remember the devil is in the details...
--Alan