performance question.
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From: CANADA
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From: Concord, NC
No....he meant lean....if you have a big squirters but you're not getting more airflow...your EEC is gonna compensate for that....so until you get more air flowing into her....no sense in depriving your engine of the fuel....basically you'll be killing your power...even if the injectors DID squirt MORE fuel...it'd still kill your power and your mileage
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From: Ottawa, Ontario
Originally Posted by EPNCSU2006
Think about it for a minute. For the same injector pulse width, a larger injector will flow more fuel, causing a rich mixture. Sure the computer will try its best to scale back the fuel to achieve the correct mixture, but if the injectors are bigger than the computer's range of adjustment, the engine will continually run rich - too much fuel. I never said this was a good thing.
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From: Ottawa, Ontario
Originally Posted by DJdemon6696
i havent got a clue ... tellme 
1.7 rockers on your stock cam won't quite bring total lift up to HO spec, it'll go from 0.416" to 0.442" lift, and duration will still be very short. A cam like the Comp 35-255-5 will give you more lift, and more duration on the exhaust to help the empty those cylinders.
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ok... i got an idea.. i think i will put a cam and leave the rocker arms stock.. its more work but it gives me more hp for the $$ ..
what is the difference between this cam " Comp 35-255-5 " and the one that you have? Crane 444232
i can see the one you have the durations are longer so that means more performance?
and will the Crane 444232 work for me?
what is the difference between this cam " Comp 35-255-5 " and the one that you have? Crane 444232
i can see the one you have the durations are longer so that means more performance?
and will the Crane 444232 work for me?
Last edited by DJdemon6696; Nov 6, 2007 at 11:16 AM.
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From: Ottawa, Ontario
Both cams will produce very similar results, I don't have any modelling for the Comp cam so I can't put numbers on it, but in this case more duration will widen the powerband slightly. Either of these will produce a big power boost from where you are now. How much? How long does it take for your truck to go 0-60 right now? I'll test my truck after work and post back. There are gearing differences between our trucks in your advantage, but this should still provide some usefull comparison data.
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here is my 0-60 time its about 10 to 11 seconds... here is the video proof
http://www.youtube.com/watch?v=VxBojdmg9JI
http://www.youtube.com/watch?v=VxBojdmg9JI
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From: Concord, NC
Originally Posted by Conanski
Actually.. the motor will run rich when in open loop(warmup and any WOT), and lean at partial throttle. With bigger injectors the actual fuel flow rate doesn't match what the computer is programmed for, so it will constantly be chasing it's tail trying to compensate. It'll really mess up an SD EFI system for sure.. just don't go there.
I couldn't agree more, though, that the computer will constantly chase itself and larger injectors without reprogramming will mess up any EFI system.
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From: Vineland, New Jersey
Originally Posted by DJdemon6696
here is my 0-60 time its about 10 to 11 seconds... here is the video proof
http://www.youtube.com/watch?v=VxBojdmg9JI
http://www.youtube.com/watch?v=VxBojdmg9JI
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Originally Posted by ACarbone624
Your truck seems pretty fast to me! And it sounds nice!
thanks
... i know and it doesnt have allot of mods..only exhuast and intake and full performance ignition system.. thats all im looking for like a 7 to 8 0- 60 time ( dunno if im asking to much )i bet paul's truck is like 6 to 8 in 0-60 ? dunno just guessing let us know paul
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i did kind of an dyno with the cams
the " CRN-444232 " one is more for high RPM's HP atleast that is what the dyno says
the " Comp 35-255-5 " cam is more like a torque cam good torque amount!! like 390 lb/trq ( atleast that is what my dyno says )
if the dyno's are right i would take the comp cam over the Crane what do you guys think?
IM NO PRO BUT I THINK THE COMP CAM IS PERFECT FOR THESE ENGINES... SEE HOW THE PEAK HP IS AT 4000 RPMS JUST RIGHT
the " CRN-444232 " one is more for high RPM's HP atleast that is what the dyno says
the " Comp 35-255-5 " cam is more like a torque cam good torque amount!! like 390 lb/trq ( atleast that is what my dyno says )
if the dyno's are right i would take the comp cam over the Crane what do you guys think?
IM NO PRO BUT I THINK THE COMP CAM IS PERFECT FOR THESE ENGINES... SEE HOW THE PEAK HP IS AT 4000 RPMS JUST RIGHT
Last edited by DJdemon6696; Nov 6, 2007 at 10:01 PM.
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From: Redmond, WA
Comp or crane off the shelf bumpsticks have treated pushrod v8's well over the years.
I personally am a fan of comp cams and their customer service. But I've seen some crane off the shelf cams, and custom grinds power some lovely motors.
Both of those cams would wake up your motor. Right now you would lose a 0-60 race or 1/4 mile run to many a short stroked (3.00") powered 5.0's with aggressive cams. Including my half ton underpowered truck. I could bolt on the stock 29" tires and run circles around you!
Now if you were to swap that stock bumpstick with that crane or comp grind you mentioned...I would stay away from a battle with that 3.50" stroke windsor.
A little port work on the heads (especially on the exhaust side) would go a long way as well. With patience, some proper tools, and a weekend.... you can really wake up that 5.8 with a cam and some pocket porting on the heads.
Mike
I personally am a fan of comp cams and their customer service. But I've seen some crane off the shelf cams, and custom grinds power some lovely motors.
Both of those cams would wake up your motor. Right now you would lose a 0-60 race or 1/4 mile run to many a short stroked (3.00") powered 5.0's with aggressive cams. Including my half ton underpowered truck. I could bolt on the stock 29" tires and run circles around you!
Now if you were to swap that stock bumpstick with that crane or comp grind you mentioned...I would stay away from a battle with that 3.50" stroke windsor.
A little port work on the heads (especially on the exhaust side) would go a long way as well. With patience, some proper tools, and a weekend.... you can really wake up that 5.8 with a cam and some pocket porting on the heads.
Mike
Last edited by Mr. M; Nov 6, 2007 at 10:56 PM.
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hell yeah .. now thats what i wanted to hear.. and ohh yeah.. ill just begin with the headers and Cam then heads porting. ..
Question:
do i need any other parts when i change the cam ?
this is the PArt.. what is it missing and what do i need?
http://store.summitracing.com/partdetail.asp?part=CCA-35-255-5
i know what your thinking its time to change the timing chain also.. but it has already been changed 3 years ago.. so it isnt that old..
i found a site about this cam http://www.jegs.com/webapp/wcs/store...1_746628_11273
and it said
We do not recommend the use of stock valve train components with these camshafts due to the aggressive lobe designs.
what does that means?
.. now thats what i wanted to hear.. and ohh yeah.. ill just begin with the headers and Cam then heads porting. ..Question:
do i need any other parts when i change the cam ?
this is the PArt.. what is it missing and what do i need?
http://store.summitracing.com/partdetail.asp?part=CCA-35-255-5
i know what your thinking its time to change the timing chain also.. but it has already been changed 3 years ago.. so it isnt that old..
i found a site about this cam http://www.jegs.com/webapp/wcs/store...1_746628_11273
and it said
We do not recommend the use of stock valve train components with these camshafts due to the aggressive lobe designs.
what does that means?
Last edited by DJdemon6696; Nov 7, 2007 at 08:45 AM.
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From: Ottawa, Ontario
Originally Posted by DJdemon6696
you out there paul ? lol still waiting for your 0-60 time
. I'll see if I can fit it in today. Stay tuned....