I know it makes it sound bad ass but how much does it really help performance wise?
How effective are cams on a dsm?
ricr1990
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Well I have a friend who can port and polish well for cheap and I dont NEED it but I will have the engine apart and out of the car so anything that will give potential that I can afford right now im doing. I understand why cams work and why they give power and performance im not that dumb but I did portray it that way.Steve93Talon said:
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827 Posts
Cams while they make more power, they shift your powerband.
It's not as simple as buying the biggest you can as they "make the most power" as that's just WAY too broad.
Basically, the bigger the cams, the more up north your powerband will be. Having a turbo and intake setup to compliment it will help you making the most power you can.
I don't know what turbo you're running right now but it would be pointless to put 280's on a t25 or 14b.
It's not as simple as buying the biggest you can as they "make the most power" as that's just WAY too broad.
Basically, the bigger the cams, the more up north your powerband will be. Having a turbo and intake setup to compliment it will help you making the most power you can.
I don't know what turbo you're running right now but it would be pointless to put 280's on a t25 or 14b.
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2,263 Posts
Enough chat chat and bench racing.
Here is some real world data on what cams can do for a turbo setup in a 4G63T if paired accordingly.
This was a dyno from the last engine build that was in my car on a higher milage bone stock 6bolt long block and tranny with a To4b V-Trim on about 95 octane (mix of 100 and 91) with no other significant mods.
Rough tune 23psi (ish) with 22 counts of knock. Comp 200s
Before and After:
![Image]()
BIG difference... Roughly 60whp/34wtq So chose accordingly and with some tuning and even some degreeing even more can be seen.
Here is some real world data on what cams can do for a turbo setup in a 4G63T if paired accordingly.
This was a dyno from the last engine build that was in my car on a higher milage bone stock 6bolt long block and tranny with a To4b V-Trim on about 95 octane (mix of 100 and 91) with no other significant mods.
Rough tune 23psi (ish) with 22 counts of knock. Comp 200s
Before and After:
BIG difference... Roughly 60whp/34wtq So chose accordingly and with some tuning and even some degreeing even more can be seen.
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21 Posts
Youre expecting to make 400+ AWHP but you dont know if cams add performance or just a *bad ass sound*...Idk,good luck
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69 Posts
Doesnt the loopyness of the cams have to di with the cam gears aswell
Cams will help your car "breathe" better, or help your car operate closer to 100% volumetric efficiency. There is of course a trade off.
Cams that tend to help up top will make your low RPM not perform like it was. The question is, where do you want your power?
As for the grind, the more aggressive, the more your car will perform up top, and not down low. This can be adjusted slightly with cam gears.
Cam gears are neat to have with dual cams since you can adjust the intake and exhaust timing separately. If it were a single cam setup, all you could do is move the entire power band either closer to top end or bottom, or anywhere in between. Dual cam gears allow you to widen or narrow the power band, AND shift it around.
Going back to the main purpose of aftermarket cams, they help your car operate at a higher volumetric efficiency in a given power band. Since modern DOHC motors are pegging somewhere close to 90% VE from the factory anyway, this makes the price/performance ratio not so good. Plus you really need a dyno to tune with cam gears unless you want to hole your pistons and bend valves.
I suggest spending your money elsewhere first. Returns for cams are not as worth it as say, everything else before the air even enters the motor. Get a bigger turbo, upgrade your intercooler plumbing, intercooler, fuel system, exhaust manifold, turbine housing, downpipe, exhaust, air filter, MAF, and all the electronics to support these mods. Once everything else outflows your motor, then I would worry about head work.
Cams that tend to help up top will make your low RPM not perform like it was. The question is, where do you want your power?
As for the grind, the more aggressive, the more your car will perform up top, and not down low. This can be adjusted slightly with cam gears.
Cam gears are neat to have with dual cams since you can adjust the intake and exhaust timing separately. If it were a single cam setup, all you could do is move the entire power band either closer to top end or bottom, or anywhere in between. Dual cam gears allow you to widen or narrow the power band, AND shift it around.
Going back to the main purpose of aftermarket cams, they help your car operate at a higher volumetric efficiency in a given power band. Since modern DOHC motors are pegging somewhere close to 90% VE from the factory anyway, this makes the price/performance ratio not so good. Plus you really need a dyno to tune with cam gears unless you want to hole your pistons and bend valves.
I suggest spending your money elsewhere first. Returns for cams are not as worth it as say, everything else before the air even enters the motor. Get a bigger turbo, upgrade your intercooler plumbing, intercooler, fuel system, exhaust manifold, turbine housing, downpipe, exhaust, air filter, MAF, and all the electronics to support these mods. Once everything else outflows your motor, then I would worry about head work.
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2,204 Posts
I bet a FP3052 on a 2.3 L. stroker would not feel laggy. Especially with some 264's. :banana:JOEY A said:
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