Snopczynski Posted November 26, 2010 Report Posted November 26, 2010 Most of the chopped cubs we built are around 188-189 durations. We have one that is closer to 184-186 range and pulls pretty well off the bottom. Quote
bbcmudtruck Posted December 1, 2010 Report Posted December 1, 2010 Are you going to offer a 10mil serval? How bout a package deal? What kinda of retarded torque numbers could you get out of a 10mil serval? Quote
Snopczynski Posted December 1, 2010 Report Posted December 1, 2010 Are you going to offer a 10mil serval? How bout a package deal? What kinda of retarded torque numbers could you get out of a 10mil serval? They stated somewhere earlier they would only make stock stroke and 4mm servals. Quote
bbcmudtruck Posted December 2, 2010 Report Posted December 2, 2010 Bummer.. A 10mil serval would throw off some awesome tourque numbers for sure. The power curve would just be a straight up and down line! Quote
trickedcarbine Posted December 2, 2010 Report Posted December 2, 2010 Yeah, a 10 mil would be sick! Another unmentioned combo that I was pondering, pair the Serval with that 2-1 Shearer pipe and maybe some 34TM's or some 35 strykers. Maybe still get 80 and push the envelope on torque a bit. Maybe 60ish on torque. Quote
RobertR Posted December 2, 2010 Report Posted December 2, 2010 wounder how the numbers would be with 28mm carbs and Paul Tuners mids. Quote
okbeast Posted December 2, 2010 Report Posted December 2, 2010 You could always get the 4mil serval then bore it all out and re-sleeve it... Quote
bbcmudtruck Posted December 2, 2010 Report Posted December 2, 2010 You could always get the 4mil serval then bore it all out and re-sleeve it... No, I want a bolt on 10mil package damit! Quote
Fastassbanshee96 Posted December 2, 2010 Report Posted December 2, 2010 Hey guys, so these cylinders sound like they are going to be pretty sweet. I'm actually having one built in a 4mil setup. I can't wait to see how it runs. Should be a big difference going from a stock stroke stock port with little bolt ons. So I was wondering if anyone has any video of these things in action. I would really like to see what I have to look forward to. Quote
jay shafer Posted December 3, 2010 Report Posted December 3, 2010 Andy at M&M just said that calvin is making the serval and wampus in all stroke combinations!!!!!!! Quote
AKheathen Posted December 3, 2010 Report Posted December 3, 2010 wounder how the numbers would be with 28mm carbs and Paul Tuners mids. just an educated guess, but i believe ptr mids would just choke it down..... on another note... thank you for the work on these cyls. just found out they are coming in all different stroke combinations, not sure about the bores, though. we've been talking and hoping it would happen soon. never expected to hear about it so soon, though anyways, i do have one question....... would it be possible to get a set un-plated? i know i'm not the only one that gets realy turned off by the nicasil plating. and, if it could save on manufacturing costs, and maybe pass a litte savings on, then we could sleeve it. i had, and still have cash-in-hand, but decided not to impulse-buy once i thought about it. Quote
68chevyc10355 Posted December 3, 2010 Report Posted December 3, 2010 just an educated guess, but i believe ptr mids would just choke it down..... on another note... thank you for the work on these cyls. just found out they are coming in all different stroke combinations, not sure about the bores, though. we've been talking and hoping it would happen soon. never expected to hear about it so soon, though anyways, i do have one question....... would it be possible to get a set un-plated? i know i'm not the only one that gets realy turned off by the nicasil plating. and, if it could save on manufacturing costs, and maybe pass a litte savings on, then we could sleeve it. i had, and still have cash-in-hand, but decided not to impulse-buy once i thought about it. Just out of curiousity, what do you have against nikasil? Is it just the fact that if something goes wrong that it has to be replated instead of getting a clean-up bore? Quote
kingsley Posted December 3, 2010 Report Posted December 3, 2010 For me its all about the low/mid grunt, everything on top is a bonus.... I agree for the guy out there that have to pay to build a 7mm serval would be almost a waste to make 5hp+ or so more, unless you know some people, because it will be lots of work and money for that extra few hp, 7mm crank, porting and maybe decking depending what durations you want.... BUT the torque curve will be even smoother and wider... I do my own work, cut my own heads, porting etc.... there was something that changed my life "LOW AND WIDE" on a high transfer.... We are looking into decking the serval to keep the exhaust port low and the transfers under 130s, not sure what the deck height of the stock serval is or base gasket, but putting a 7mm in there with -1.5mm deck height will bring the transfers to about 130.7degrees... With 0.5mm shave of the bottom you should be in the 128s.... I also think with the extra 3mm stroke, pro circuits etc this thing will torque like a train... I will try my best to put it on a Dynojet with stock carbs and 33s, just to see what she make..... For me its almost more fun building these things then riding them.... If it was not for the servals, I would have decked a 7mm cheetah cub.... Its all about the fun..... If you were to take a 4mm serval,run the 7mm crank, no base gasket and cut domes, Would that be what you would work with? If im right, does this efectivly raise the ports on the serval and increase the RPM level when the torque comes in or does it over come the issue with the extra 3mm on the stroke? Reason for asking is that i will be running that combination with 34mm carbys, +4timing and FMF fattys with 22cc domes. Just awaiting the cut domes. Quote
2strokespirit Posted December 4, 2010 Report Posted December 4, 2010 If you were to take a 4mm serval,run the 7mm crank, no base gasket and cut domes, Would that be what you would work with? If im right, does this efectivly raise the ports on the serval and increase the RPM level when the torque comes in or does it over come the issue with the extra 3mm on the stroke? Reason for asking is that i will be running that combination with 34mm carbys, +4timing and FMF fattys with 22cc domes. Just awaiting the cut domes. [/quote No, you will still have to lower the ports as well, yes it will increase exh and transfer duration without touching the port roofs and only lower the bottoms. Yes it does "increase the rpm level when the power begins" (depending on setup etc) But this can also be done by changing the blow down... I will rather keep ports low and wide as possible (185 - 192) 70 - 75% exh width depending on your application and amount of ring wear that is exceptable... Drag racg is waaaay different, you want lots of time area and duration, durations alone means nothing.... But one can get a fair idea of whats going on when getting them... This has now all changed, order the 7mms, when I was ready to buy the 4mms, Jeff informed me that there are 7mms on the way!!!!!! So no decking or porting anymore, will just clean up the casting flaws and maybe increase time area here and there, but first I want it in my hand to see what everything stock measures up... Quote
2Go-Fast Posted December 5, 2010 Report Posted December 5, 2010 (edited) If you were to take a 4mm serval,run the 7mm crank, no base gasket and cut domes...... I check a few of these sites out from time to time, and when I saw the questions asked in this post, (and where you were from), I recognized a question that I had worked quite a while on with one of my dealers very recently, (actually I think it was Friday). The side view that I am attaching should show the use of a 4mill Serval cylinder with a 7mill crank, the port durations are shown at the top of the page when using a .012 gasket, and when using no gasket and sealing the cylinder down. Actually, the port timings are very close to where they will be when the 7mill Serval is finished. Hope this helps, Calvin Pollet Sideview of CPI-S6861P_Special_Serval_Cub .pdf I guess this site does not allow opening of "pdf" files on the screen, so you will need to download the file....sorry Edited December 5, 2010 by 2Go-Fast Quote
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