Head Porting - Honda TRX Forums: Honda TRX 450R Forum
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post #1 of 38 (permalink) Old 12-26-2006, 12:58 PM Thread Starter
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I feel like a total noob asking this... But what is it that I need to do to the head to gain power? Does a port job and valve seat machining open it up to give me more power? Duncan racing offers that job for $450 ----> http://www.duncanracing.com/prods/PO-4VLV-VJ/ Is this a good deal? LOL. I need some major help with what to do.

Incase is matters, im running Ice Cube 498 with 13.5:1, rossier exhaust, hotcam 2. and aftermarket intake and jetting. But completely stock head, valves, everything.

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post #2 of 38 (permalink) Old 12-26-2006, 01:05 PM
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you ought to search this topic, which can be a touchy subject at times.

Site sponsors that do it and I'd suggest you go through one of them:

KBR/Venom
WPP Racing
Rossier Eng.
Max Power
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post #3 of 38 (permalink) Old 12-26-2006, 01:42 PM
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i havr heard good stuff from DRI PORTING....

they also use a serdi :D seems a bit pricey though.. 450..




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2009 BMW M5

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post #4 of 38 (permalink) Old 12-26-2006, 01:44 PM
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VENOM all the way.

05- 480R -RED-
14.1 HammerHedz
Nelson Racing Ported Head/ KW springs
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Ron Wood Racing Exh.
Dynatec CDI
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ProArmor-PRO XC Bumper-Graphite/Metalflake
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Axe Skidplate-RED- 06 Swingarm - G-Force Axle +2+2
Shockwears-BLACK-
Douglas Red Lable Rims
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post #5 of 38 (permalink) Old 12-26-2006, 02:59 PM
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Check out the site sponsors!!!!!!!!!!! :)

Gary
My 04/05 Honda TRX450R Site

(^^^TRX450R tech articles, dyno testing, pics, vids, and more)

| '04 Racers Edge, AZ "WV #304" Flat Dragger|
| '05 Wicked Motors, MD "PunisheR" Play Dragger|
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post #6 of 38 (permalink) Old 12-27-2006, 09:38 AM
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a 'Serdi' would not be used for porting....but rather for a valve job by cutting the seats.....

not a standard procedure for porting......

I can attest to Venom/KBR......... but wont count out other sponsors here on the org...

good luck.....Greg

**06 450ER**... #3 (Dale lives on)

86TRX250R (mostly stock 66mm bore x 72mm stroke) **for sale**
86TRX250R (ESR310 72.5mm bore x 72mm stroke '298cc' fully modded) **SOLD**
88TRX250R (ESR330 77.5mm bore x 74mm stroker '345cc' fully modded)

HRC kit (all but gone)
Hot Cams stage III
Okie porting w/ATP CV4 springs (36mm Ti/31mm)
Venom/KBR N2O Porting w/KW springs (37mm/31mm)
Venom/KBR 487 100mm 14.25:1 piston
Cold Fusion Nitrous**
Venom 'QP' pipe
ESR Pro Series pipe
ESR modded intake w/RAT stack
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Direct Drive clutch lockout, CR500 springs
GT Thunder-Link w/Durablue Lowering Link
Durablue Anti-Sway Bar
Modded shock mounts
Rage Modded Tranny

Jetting/Carb: #168, #45slow, NGPR needle 3rd clip, #55 Leakjet, Pilot 2 turns out.
Jetting/N2O: 22N/21F (22hp)

*STU Comp Cut 21x12x8 (6) paddle 'Padla Brats' on Douglas Blue label 8x8.....

Thanx to: Venom/KBR (Mixxer/Kam), Rage ATV (Dee), Sredum (Chris), and many ORG members
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post #7 of 38 (permalink) Old 12-27-2006, 09:52 AM
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i think the serdi and porting are standard procedure with them.. but the depends on the number of valve which give the final cost...



-lumi

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2009 BMW M5

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post #8 of 38 (permalink) Old 12-27-2006, 12:04 PM
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I have yet to see any documentation or dyno charts from companies like Duncan, Sparks, Pro-Circuit, Alba etc that show the gains they achieved by porting a 450. They might exist, but I haven't seen any of them.

Sponsors here actually show their results, and members verify and post results here.

Proof is in the pudding - as they say. I would never buy anything from anyone that is not willing to have their results published and showcased.

07 HD FLHT - sorry, but let's face it, riding a hog gets you laid more than riding a trx ;-)

06 TRX511ER - SOLD
Venom Porting and Head Mods with +1 KW Valves all around
Venom 100mm 14.25:1 Piston
Venom Modded ESR Intake
Venom Modded 43mm FCR with Rat Stack
Venom Exhaust
Hot Rods +3 Stroker
MaxPower Ice Cube Cylinder
Early HRC Cam


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post #9 of 38 (permalink) Old 12-27-2006, 12:24 PM
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Here's a couple;

Rage Atv / Dee Manshack - Builder for the 2005 National Champ, John Natalie

Dasa / Dan Lamey - Builder for the 2006 National Champ, Joe Byrd

I've never used Dasa, but I have experience with Rage. Highly recomended!

Accept that some days you're the pigeon, and some days you're the statue.



04' TRX450R

Rage Racing Head, Ferrera Valves w/ + 1 exhaust, 05 CRF cam twisted 3 degrees, Racers Edge 490 13:1, 44 mm FCR, Trail Tech -4 Flywheel, Vortec Ignition, Rage Racing Pipe, LoneStar Long Travel, Lonestar Axle, Hermman Swingarm, Axis Shocks, GT Thunder Link, Douglas Shamrocks, Burgard +1 Stem, Protaper Bars, Fullbore Hood, AC nerfs, IMS pegs, Jannsen ant-fade, Lonestar carrier, ASV levers, Lonestar Hubs, Duncan Bumper, IMS Nerfs-Pegs and Heel Gaurds


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post #10 of 38 (permalink) Old 12-27-2006, 12:52 PM
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Rage ATV or Dasa are excellent choices.....

07 Renegade 840cc, 89 TRX250R

04 TRX450R stock stroke and bore, play bike!!

Racers Edge Tuscon AZ, Top Notch Guys
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post #11 of 38 (permalink) Old 12-27-2006, 01:03 PM
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Love my Venom!!

Why is it that slim and fat chance mean the same thing?
-----------------
07 CRF250R
05 450r- Venom Piston- Mixxer Magic- Kibble White- Dynatek- HC2- Pulse Charger- GT Thunder
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post #12 of 38 (permalink) Old 12-27-2006, 01:08 PM
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I highly recommend Rage as well.

Special thanks to Rage for all your hard work...

Team DTO
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post #13 of 38 (permalink) Old 12-27-2006, 04:22 PM Thread Starter
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Awesome... Thanks for the help guys! Both Rage and Dasa have VERY good credentials... but looks like I will be going through Dasa since their shop is only 15 min away. Ill be sure to post up the flow chart when it gets done.

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post #14 of 38 (permalink) Old 12-27-2006, 04:37 PM
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Quote:
Awesome... Thanks for the help guys! Both Rage and Dasa have VERY good credentials... but looks like I will be going through Dasa since their shop is only 15 min away. Ill be sure to post up the flow chart when it gets done.[/b]
I think we'd all be much more interested in a dyno run...

07 HD FLHT - sorry, but let's face it, riding a hog gets you laid more than riding a trx ;-)

06 TRX511ER - SOLD
Venom Porting and Head Mods with +1 KW Valves all around
Venom 100mm 14.25:1 Piston
Venom Modded ESR Intake
Venom Modded 43mm FCR with Rat Stack
Venom Exhaust
Hot Rods +3 Stroker
MaxPower Ice Cube Cylinder
Early HRC Cam


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post #15 of 38 (permalink) Old 12-28-2006, 07:56 PM
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Quote:
<div class='quotemain'>Awesome... Thanks for the help guys! Both Rage and Dasa have VERY good credentials... but looks like I will be going through Dasa since their shop is only 15 min away. Ill be sure to post up the flow chart when it gets done.[/b]
I think we'd all be much more interested in a dyno run...
[/b][/quote]


flow charts don't mean anything...and sometimes they mean less than that.....

a dyno run...done on the industry standard : DYNOJET..... would be a lot more useful for a comparison that really means the most for the most people....

hit me up at jcziehl61@gmail.com

My non "wheelchair class" ride: 2007 CRF270R / extra armor and guards / pumped up / geared up/ soft terrain woods runner..... dyno was B4 pump gas Big Bore
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