Need a cam expert....

CableGuy

CableGuy

Authentic Strummer
This is what im using now.... (Turbo 4 cylinder)

Advertised Duration Intake/Exhaust 248/248
Duration @ .050 Intake/Exhaust 194/196
Lobe Separation 113
Gross Lift 325/259

People say this is a better cam for our cars... true?


Advertised Duration Intake/Exhaust 243/243
Duration @ .050 Intake/Exhaust 196/196
Lobe Separation 108
Gross Lift 344/315

(I can get these cams above for CHEAP which is why i need to know and my motor is apart now so it would be a good time to put them in.)

Thanks!:peelout:


Also... why is the lift less on the last cam, but the "Gross lift" is more?
 
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cam choice

there isnt a whole lot of difference between these two cams other than lobe seperation which depends if your running the motor on just motor or sprayin it the lift on the second cam is a lil bit bigger but you could make that up on the 1st cam with a lil bit bigger rocker
 
LSA is dependent on a few factors but i wouldn;t think a 4v head with a turbo is gonna like a tight lsa actually my gut tells me that anything tighter then a stock lsa is going to cost some hefty power. My advice is to get some adjustable cam gears if you want to want to experiment with LSA since your engine is DOHC you can change the LSA as simply as retarding the intake cam and advancing the exh cam.
 
And this is a extreme cam or our cars which makes it lope like a cammed V8, and make big power on big turbos.

Advertised Duration Intake/Exhaust 258 / 258
Duration @ .050 Intake/Exhaust 216/216
Lobe Separation 108
Gross Lift 394/394

But these are 400+ and retainers and springs and bs.. while the 2nd cam I can get for CHEAP.
 
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CableGuy said:
And this is a extreme cam or our cars which makes it lope like a cammed V8, and make big power on big turbos.

Advertised Duration Intake/Exhaust 258 / 258
Duration @ .050 Intake/Exhaust 216/216
Lobe Separation 108
Gross Lift 394/394

But these are 400+ and retainers and springs and bs.. while the 2nd cam I can get for CHEAP.
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Honsetly i don;t see the tighter lsa making that much extra power if any at all unless the wrong turbo housings are being used. its a complex subject. Id get adjustable cam gear and adjust the LSA the right way by testing it.
 
Sean said:
Honsetly i don;t see the tighter lsa making that much extra power if any at all unless the wrong turbo housings are being used. its a complex subject. Id get adjustable cam gear and adjust the LSA the right way by testing it.
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Odd, those are the upgraded cams for our cars....?:dontknow:
 
CableGuy said:
Odd, those are the upgraded cams for our cars....?:dontknow:
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Well explain to me why the newer wider lsa LS1 cams we use make 30-40 more hp then the last run of cams we've tested.I can and its a fiarly simple answer. the combination of runner length port volume and exhuast design have all hit a nexus point. The other thing to pay critical attention to is that tighter LSA's generally get very exhuast sensitive. If you have a small hot side and a not quiet ideal exhuast system and your not worrying about building a high specific ouput design motor then its best to stay away from the tighter lsa's. Along side this is the fact that the factory head has excelent breathing capabilty unlike a 2v engine which will require far narrower LSA's to aceheive an optimal balance of HP and TQ for the desired output. Remeber LSA is a crutch for poor port design.Sticking in a long duration tight lsa camshaft on highly effiicient ports and chamber could cost power especially when coupled with a smallish hotside. If you wanted to run a camshaft like this experience tells me that your going to get a very topended engine running in the 6500-8200rpm zone and it thats what your looking for then those large cams might be the best way to go but you'll loose low end power and driveability.the other thing will be that you'll need to most likely revisit your turbo ho8using exhuast etc to make it optimally efficient agains pushing the powerband further north.
 
Adam is that 2nd one you're saying you can get for cheap the one from the N/A Neons? If I were going to get aftermarket cams/gears I'd go with Crower Stage 2's and Fidanza adjustable cam gears. They're more money and you need the springs and other crap with the cams, but the idea of the N/A Neon cams just seems wrong.
 
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