Group buy - Custom RB25 Cams

[minivan_don]

OK - i got permission from Carl & GREG to post this. i even asked carl to post this for me a few weeks ago, but i understand he is very busy however i still need to post this. for the mods who are not familiar with this thread, PLEASE DO NOT DELETE IT! please contact Carl or Greg.

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So, for those that are new to this topic or for those that have caught wind of these rb25det regrind cams through various threads, I have finally found the time to post this group buy – OFICIALLY!

I’m proud to announce that in partnership with Geoff Bardal of Colt Cams (BC, Canada) and with permission with the moderators of the RB forums the Colt Cam Tri Flow RB25DET Reground cams.

Who is Colt Cams?http://www.coltcams.comOwner Geoff provides custom camshaft grinding using the latest technology for the “next level” in performance.

Geoff has over 25 years experience in camshaft grinding and design. His custom camshaft designs are well known in the automotive world and he has expertise in all types and makes of camshafts.

Colt Cams Inc. is a Canadian based business, but work closely with many customers in the United States as well as worldwide. Geoff and the crew at Colt Cams Inc. are a team that strongly believes in great customer service and relations.

What is Tri Flow Technology?The most common problems encountered when performance camshafts are installed are the loss of bottom end torque, poor idle quality and computer problems.

This phenomenon has been more and more prevalent with high-revving, multi-valve engines. When two valves open at the same time, there is twice as much room for the air to move through. Picture a vacuum hose that has a diameter of say 1". It could quite easily suck up marbles or small rocks. If that same vacuum was hooked up to a vacuum hose of say 5" diameters, what could it pick up? Maybe a feather, but the marbles and small rocks are totally out of the question. An engine works the same way!

When an engine is optimized for HIGH-RPM power, the LOW-RPM power will unfortunately have to be sacrificed... or will it?

What if someone could make a performance camshaft that could make better power at HIGH-RPM with a minimum low - rpm torque loss, without the use of a variable lift cam system? Colt Cams has managed to do just this for virtually ANY multi-valve engine. By staggering the opening times of the two intake lobes, we have created a swirl in the system. The principle behind this design is to open the intake valves progressively. Opening one valve first allows the fuel to travel across the chamber at a greater velocity due to the smaller venturi action, it then helps pull in the second charge at a faster rate.

This gives the equivalent to the secondaries opening up in a carburetor. In turn, with the larger cam, the engine has better vacuum at idle since there is less overlap, throttle response is greatly increased, and turbocharged vehicles have noticed less lag and faster spool up time.Geoff's theories on the "Tri-flow" have been proven time and time again, on many different engines. The testing has proven the theory, and now it is time to let the world see the results.

All the above information as well as other services, testimonials, pictures, and additional misc can be found at http://www.coltcams.com

****Colt Cams also makes ALL of http://www.pdm-racing.com cams if anyone wants a reference point of quality and performance.

My Setup:95 S14 240sxFully Build/Balanced RB25DET S2Head mild ported, 3 angle valve job, tomei valve springsStock Exhaust manifold w/ custom external wg adapterGreddy style intake manifold with mild portingGarrett GT35R .82 ar turbo @ 19psi on pump gasHaltech E11V2(There are a TONE more mods, but these are more less what is immediately relevant)

My Goal:- to develop with Geoff, test, and launch to the RB25 enthusiast an alternative to JDM branded cams (Tomei, HKS, ect) which compete at or with better results while being affordable and streetable. Most importantly, the cams had to be a direct bolt in on a stock or modified rb25det with NO modifications to the head.

Colt Cam Regrind Specs:Primary intake - 268 degSecondary intake – 260 degExhaust – 264 degThis combination adds 1mm of valve lift to make it 8.8mm.

The Verdict:I want to apologize for the poorly scanned dyno graphs. You CAN read them, but you may have to zoom in on areas.

After my initial engine break in from being built, my tuner Mark Carlson with Racing Greed (New Westminster, BC. http://racinggreed.com/) dialed in a conservative tune on the stock cams while I was running the .9 bar spring in my Tial 44mm wastegate but I was spiking to a full 1bar. The net hp was 323whp and 240wtq on a Mustang Dyno which are notorious for reading lower and based on many other cars using this same dyno, RG has found their dyno to read on average an additional 10% low.

This is some background info for some that may question my results.

Stock cams, 14.5 psi, tuned but still conservativehttp://i55.photobucket.com/alb...d.jpg

I then had Geoff regrind my stock cams to his recommendations to maintain street-ability (meaning smooth idle). With no additional tuning – just me reassembling everything after the cam installs, I immediately noticed a smoother power band, a bit more tq (aka grunt) sooner and no problems revving up top. I then hopped on RG’s dyno the next day with NO TUNING of any sort. I did not expect any real gains without additional tuning, the new cams netted a peak of 7whp and 6wtq HOWEVER there were gains on average of 10-20whp AND wtq in other parts of the rmp range (specifically lower to mid range) after we played with the cam timing.

Colts Cams regrinds, 14.5 psi, no additional tuning http://i55.photobucket.com/alb...d.jpg

Colt Cam regrinds, 14.5 psi, only timing tuninghttp://i55.photobucket.com/alb...g.jpg

Colt Cams, 19psi before and after timing tuninghttp://i55.photobucket.com/alb...g.jpg

Again, with RG’s Mark Carlson making adjustments to tuning while still staying very conservative, we then proceeded to up the boost to about 19psi using a manual boost controller. We did this to how the Colt Cams would react as I planned on running these boost levels (and more in the futre) … the results were 370whp and 289wtq!!! What amazed all that watched the countless dyno pulls we made from the 1st run to the last was that the majority of the times I did not stop making hp! I was revving to 7800 and we were seeing next to no hp fading in the upper rpms where as many thought that I would have peaked for flat lined earlier.

Colt Cams, 19psi, tunedhttp://i55.photobucket.com/alb...d.jpg

All in all, I love the overall feel of these cams every time I take my car out. I love how I never stop pulling in the rpms and how smooth things are down low especially since there was no lost power. The idle was not compromised any bit and the bottom end power is very smooth & apparent. Again, my tune was very conservative as i did not want to damage anything and wanted to create as reliable power as i could.

My plans in the future are to run race gas, up the boost again, and even run a 70shot as a pre-spooler.

My friend has used the non tri flow billet colt cams in his NA 91 ka and they rocked. He was actually able to pass the local emissions testing with better results that with his stock cams!! I had a near identical setup as my friends 91 240, but I had Crower cams, and I eventually took the Crower cams out as I had horrible idle (cold or warm), VERY noticeable decrease in gas milage (about 10% on avg), and did not feel the same power in the upper rpms.

I also have a friend with a fully build ka-t with running Crower cams, valve springs, oversized valves and porting that is heavily considering getting the Colt Cams ka turbo cams as he wants better idle and a smoother rpm range.

How to Buy / The Details:As mentioned in my goal, I always had the intention of these regrind cams to be affordable. The only criterion that Geoff has is to have a MINIMUM 6 people for each regrind run. Since it is very time consuming for Geoff to setup his machines, he likes to setup only once if he knows he has ‘X’ amount of RB cams coming in for grinding. Turn around time once ALL cams have arrived to his shop is about 2 business weeks before they are mailed for return.

Since this is the first launch of these cams, Geoff has offered a promotional price of $460 CDN for each set of regrinds (taxes included). He normally charges about $580-600 for a 6cly dohc motor. Each person is responsible for shipping to Colts Cams (see shipping info below) and return shipping is about $25 CDN.

**** Each member that is participating will have to email myself their info and payment (via paypal or money order). I will then let Geoff know who to expect cams from. If at any time you wish to contact Geoff, his contact info is on http://www.coltcams.com

email – avolcz @ hotmail.compaypal – avolcz @ hotmail.com

*** Shipping info!!THIS MUST BE FOLLOWED EXACTLY FOR US RESIDENTSTHIS MUST BE FOLLOWED EXACTLY FOR US RESIDENTSTHIS MUST BE FOLLOWED EXACTLY FOR US RESIDENTSTHIS MUST BE FOLLOWED EXACTLY FOR US RESIDENTSWhen sending in your cams, via any courier service or the post office. Please put as the value of the cam or cams to be under $10.00 total. This falls under NAFTA and no duty charges will be inflicted on you. Please put on the waybill as well as on the package: "DAMAGED CAMSHAFT FOR REPAIR AND RETURN". Make sure the cam cores are packaged well in a sturdy container.

Please include all cam related information as well as name, return address and telephone number.

A good rule of thumb – how you ship your cams is how they will likely be shipped back to you so pack them right!

FOR CANADIAN RESIDENTS, PLEASE FOLLOW THE SAME PROCEDURE BUT YOU DO NOT NEED TO WORRY ABOUT LABELING THE CAMSHAFTS AS DAMAGED UNITS.

Group Buy Members:1) my buddy loo2) s12_hybrid (Dan C)3)4)5)6)

Modified by minivan_don at 9:31 PM 11/13/2007
Modified by minivan_don at 6:54 AM 12/30/2007

[Carl H]

good stuff guys, sorry bout no posting this earlier.

[Shocker]

+1 for Colt Cams, Geoff did a great job on making me an exhaust side regrind, was pretty fast too.

[uber95]

Sounds like a good setup BTW for those wanting currency conversion, as of 10/30/07 the Canadian $$ is worth $1.05 to our weak U.S. $$ of $0.95

[fast_s14]

This is an awesome deal on a set of custom cams. I would definately be down but i am already on Darius group buy for the rb25 topmount manifold.

[Nick51]

wut about us rb20 guys?

[minivan_don]

sorry, nothing for the rb20's at the moment ... geoff and i have talked about it but it wouldnt be anytime soon.

[T-78RX-7]

I have a series 2 RB25. Will that work for me??

[Sil240]

awww.....No 20 Love??????



I understand

[minivan_don]

YES, this regrind works with either series motor/either cas type.

[minivan_don]

just a reminder ... for those that can spend the time on the dyno to TRUELY dial in these cams in, im sure you can yield greater results. you could play around with the exhaust cam timing to see if you can what combination works best for your tune.

one thing i also forgot to mention ... when i did all my dynoing in the summer, it was 30C (about 90-95F) in the dyno room!!

[Shocker]

not to mention it was a mustang dyno.. so lower readings yielded, go to a local track and get a trap speed for us please!

[minivan_don]

only time i made it to the track this summer ... i yielded a best of 13.4 @ 110.x mph. 2.3 60ft. that was at the 19psi. traction issues in 1st and 2nd as i was running 265/35/18 street kumho spt tires, and slow shifting (clutch was still being broken in)

my mph on my best run shows indicates i can run faster which would support a mid/low 12 sec pass. btw, my car is running full interior - i weighed in at 3100 lbs.

[Shocker]

Whoa.. that was with the 35r......? hmmm I was trapping 109 stock turbo lol. Don, have you got these issues sorted out and planning to make a trip back? Also, I'd expect to see 120ish.

[Chaos the Xile]

Don my hero! Been waiting for these and they look good!

[minivan_don]

track here has been closed for near a month now ... maybe next season i can do better. that was my 2nd time to the track ever, 1st on the rb setup... so its safe to say that im not the best driver. the clutch is broken in more but my car 240 is in storage for the winter now...

[minivan_don]

GET ON THE LIST !!!

[Sky80]

waiting on some 20 love

[uber95]

waiting on some 20 love

+1

[minivan_don]

rb20 cams wont be happening anytime soon guys ....

[Carl H]

the 20 and 25 use identical exhaust cams...only the intake is diffrent.i dont see why he couldnt apply the same mods to the 20 cams as he does the 25, but im not the guy running the show.

[minivan_don]

the 20 and 25 use identical exhaust cams...only the intake is diffrent.i dont see why he couldnt apply the same mods to the 20 cams as he does the 25, but im not the guy running the show.

i did not know that ... if its true then awsome! i have access to a friends spare rb20 (and the cams) so maybe as winter project i can work something else out with Geoff but we need to have people participating in this group buy before we get started on the rb20 intake cam.

list is updated!
Modified by minivan_don at 10:48 AM 11/12/2007

[S14-NEO]

i am curious to know if he is able to do anything with the cams in the RB25 NEO...they do have a more aggresive profile and they are also riding on solid lifters...(yay for me)....lol...let us know especially me!!

[minivan_don]

im sure Geoff could produce a set for the neo ... but you are the only one at this time. a custom set of regrinds would likely cost $600-700. the only way that we could get a group buy (aka cheaper pricing) on neo regrinds is if we had a min 6 ppl but i dont think the neo is that popular yet. only time will tell ....

[S14-NEO]

yeah i kinda figured that, but to be honest im not that worried about the price (dont get me wrong im not daddy warbucks)...lol..... my biggest concern is that he is capable of a proper regrind for the NEO. i am not that sure of the spec on the stock cams but i do know that they are more aggressive than that of the S1-S2 RB25's.

[minivan_don]

i wouldnt doubt that the neo has a bit more agressive profile ... im sure we can figure it out if you wanted to work on it. email me if you want to...

[minivan_don]

i was hoping to see some more interest than this ...

[MoogLe]

i'd be interested in this, but looks like it's not gonna happen

[S12_hybrid]

I sent him an email (Colt cams) and so far I have no received a response - however it is the holiday season so it is understandable.. I live in Victoria BC, and if need be I can see him personally about issues as he is just a ferry ride away.

I am in.

-Dan C

[S12_hybrid]

Also, add your name to the list if you are seriously IN and have the cash.

Group Buy Members:1) my buddy loo2)s12_hybrid (Dan C)3)4)5)6)