G'day...
I am in the process of building up a NA 4ag and need reccomendations/advice/suggestions for cams...
I have silvertop quads with adaptor plate, power fc computer already tuned for quads on bigport, and am getting a 100kW motor which will be rebuilt, (new rings, pistons - to up compression to 11.5:1, bearings etc)..
I was thinking around 290 degree cams with around 10mm+ lift...
The motor is going in my sprinter which will be used for mostly circuit and a little drifting work...
Crow cams are around $700 - has anyone got experience with them?
What hp and torque could I expect with this set up and has anyone built a similar motor??
Regards
Scott Brown
I have built a similar small port motor.. with quads, portwork, more compression, bottom end bearings/rings etc.. and linished rebalanced the rods.. has adaptronic ecu.. with the stock smallport 232 deg and 7.1mm lift it makes about 104rwhp..but feels a lot stronger than that.. the dyno does have some calibration issues.. but with cams around the 280 duration and 8ishmm of lift I would be expecting in the area of 135-140 rwhp.. that is a estimate..
Thanks mattyshop...
I have watched your buildup, you have done a great job....
When are you putting in new cams?..........and what specs are you looking at?
Regards
Scott Brown
PS I was keeping an eye on Evan's build until it stalled.......I can't wait until he puts those Toda cams in (288, 8.8mm) - it will be interesting to see how they go>>>>>>>>>>
thanks
there are a few other areas on my car i am improving first.. like revising the suspension/brakes and tail shaft..
but i am looking at something around 272 and just over 8mm lift.. for the big lift you want you need to grind sections of the head out to allow the insane lift!
Buy my car, use its engine and save yourself some $$$.
OK first question, are you going to use standard buckets? this will determine what cams you can use. Also for the rest of you that are quoting cam specs please include wheather you are quoting "Advertised" cam duration like TRD or duration at 50 thou.
It makes a big difference to what you are suggesting
Sprinter Veteran
G'day...
The duration I am quoting is advertised...I have seen on club4ag, blokes that have 304 and above TRD cams that have f*** all power below 6500rpm - this is not what I want, I would prefer something with less duration and power that comes on strong around 4500 - 5000 rpm - I may be way off the mark with 290 cams, if so let me know waht you use and where the power is....
I thought lift below 10.5mm with not too aggresive a ramp could be used with standard buckets..if not, correct me and once again tell me what you are using.........
If I can't get away with standard buckets I guess I will have to use underbucket shims..........
Thanks in advance......
Regards
Scott Brown
Bumpity...........
Anyone,,, Please...c'mon I need help/advice so's I don't buy unsuitable cams....
Regards
Scott
i reackon 264 - 272 with less than 9mm of lift.. very strong torque.. have a look on club 4AG cam list.. anything that they have used in rally would be really good, as they are designed for mid range torque..
it does matter also how you dial the cams in.. like for example if you retard the factory inlet cam by a few degrees, you might notice the top end of the engine increase a little at the sacrifice of bottom end.. you can make minor adjusments like a few degrees with out too much hassle but a dyno session and a degree wheel would be very handy.. i've tuned mine by the 'seat-of-my-pant-o-meter' and you can feel it kick in different areas buy doing this..
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