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Better ROI- daniel crowder cams or a PCV?

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Shoebacca78

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Discussion Starter · #1 ·
i know nothing about cams...

i think i saw cisco post about sending his cam in to get modified.

is that cheaper than just buying their cam?

DCR has them on sale for $160.

link

if i dont plan on doing BBK, do i need anything else when swapping out cams.

i'm saving up to buy a PCV in a few months, but if i get a cam, that will push the PCV purchase even further.

My top speed when stock was 68! now my top speed after doing airbox, exhaust, and windshield is 65!

i want to go up and not down in speed.
 
CiscoSanJose

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#2 · (Edited)
Some times adding too much HP junk will do more harm than good.

best bet is to do a baseline Dyno run on your all stock Grom to get the HP baseline.

Adding parts such as airbox mod afterwards and see what kind of HP gain/loss you get, maybe resetting the ECU would help first before going for a WOT run and doing a couple of laps to get the ECU to setup the correct mixture A/F that it needs.

I find that exhaust changes do add or remove HP on a motorcycle engine, I find that more so on my Harleys when I use superTrapp with adjustable plates that are added or removed on the tip of the exhaust.

Any changes with airbox mod and exhaust you'll see maybe 1/2hp to 1hp gain depending on the RPM range to me, more so you'll see a better response on pickup if the comb of mods is done correctly.

I find that some of my motorcycles esp my Hayabusa runs better in the cold or rainy weather than the warmer weather due to the density of the air.

I find removing the battery connection for a few minutes seem to help out with resetting some ECU parameters.

All my mods will be done in stages after I get a baseline dyno run so at lease I know what is my starting point and if doing my mods increased or decreased HP.

Remember the correct AIR/FUEL mixture helps in HP gain/loss, increase in HP will be seen with a bigger cylinder but if your A/F is off and your restriction of intake and exhaust flow can cause HP LOSS.
 
CiscoSanJose

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#3 · (Edited)
Shoebacca78 said:
i know nothing about cams...

i think i saw cisco post about sending his cam in to get modified.

is that cheaper than just buying their cam?

DCR has them on sale for $160.

link

if i dont plan on doing BBK, do i need anything else when swapping out cams.

i'm saving up to buy a PCV in a few months, but if i get a cam, that will push the PCV purchase even further.

My top speed when stock was 68! now my top speed after doing airbox, exhaust, and windshield is 65!

i want to go up and not down in speed.
Click to expand...
$121 swap, I haven't seen my check cashed yet and I sent my cam out about a week ago or longer
 
CiscoSanJose

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#5 ·
Shoebacca78 said:
Cisco,

Is the DCR cam, just a re machined stock cam? Or are their cams built from ground up?

When built from ground up? I think they would be better able to hit dimension tolerances...
Click to expand...
Not sure, I did a email to Daniel and he responding back with any questions I asked. Most testers I know are using the Crower Cam and the PCV mapping that some of these testers are doing will share the map that includes the Crower cam with different combo exhaust system or stock exhaust/modified exhaust.

My setup and testing will also include a computer hookup to the PCV so I can see what is going on to my Grom modified engine.
Setting up my second macbook with bootcamp to run Windows O/S so I can use the PC download and apps/software. I'm on a big learning curve on this one but I rather learn about the electronics that run the Air/fuel system and all the sensors that also help out with engine performance.
 
Shoebacca78

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Discussion Starter · #6 ·
Cisco,

My friend Elizzer or this board said that the ROI is greater with the DCR cam compared to the ROI after he installed the bazzaz w/AFM.

I know that your cam is still @ DCR.

But do you have any past exp? I have a limited budget, and like you said I want to do each upgrade spaced apart so I can see the benefits from each upgrade.

I have the Steady garage intake coming this week... I normally like to put 1-2 tanks on each upgrade so I can see the benefit. Sometimes if you make a snap judgement i.e. ride it around the block, one may make the wrong conclusion like i did after i installed the full Yoshi/ air box mod.

I didn't ride long enough between the mods to single out the issue. I still don't know which caused me to lose top end speed.

I know when i'm able to go fast, because i can hear a higher pitch tone coming from the engine.

Does running too lean = Not enough Air to fuel is max top speed isn't possible?
 
CiscoSanJose

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#7 ·
Yep I'm on a big learning curve when it comes to the Grom. I'm new at small desplacement engines coming from Harley Fatboy/Heritage and Hayabusa motorcycles.

The last small motorcycle was my 1987 YSR-50 and I could feel the HP gain from every mod that I made, 2 stroke engines don't take much to increase HP. I did notice on my YSR-50 the big HP gains was the Tooney pipes, thin head gasket "to increase compression", mod to the carb, airbox mod,removed the premix bottle and did all my premix in the gas tank, and counter sprocket change. I hit 70 mph with that 50cc 2 stroke with all my mods.
 
Mr. Nice

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#8 ·
Little research goes a long way. DCR cam is re-ground stock cam. Minimal gains without a tune. If you already have a Bazzaz it will be a real nice bang for your buck. If not, you are looking at close to $500 for cam + tune.
 
Strokd_GE

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#9 ·
The cams are regrind of a stock cam, this is why they're inexpensive

if you're tossing up which to buy, get the pcv for 2 reasons.. 1 the PCV is more expensive so it'll take longer to save that, get the expensive part out of the way. 2 you'll never see the full potential of the cam without the tuner so it's almost pointless to have the cam before the tuner
 
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