Drop-in cam

[sneaky11]

I'm looking for an hi-lift cam to put in my EX. I'm doing mostly trail riding(technical but pretty fast), sand pits and sometimes bring it to local tracks. I do some search in old threads, found some good comments on MAGNUM cam, but I want to know what can be the best for this setup:

416 12.5:1 CP piston
Lightened flywheel (13oz off)
FCR 40mm (450r)
p&p with race-cuts on valves
Running UNI filter with a full pipe

Someone know what's the MAGNUM web site?

Thx for your help!

[NacsMXer]

Stage 2 Hotcam would be perfect for your setup. Stage 3 Hotcam if you want a bigger hit in the top end. Both are drop in cams. The stage 3 is about as high lift as they come for drop in cams.

Here's some specs if you want to compare. I have never been able to find any specs for Magnum cams so I couldn't tell you anything about them.


cam: Intake lift; Exhaust lift; Intake duration; Exhaust duration

stock............... .316, .302, 234, 238

XR400.............. .326, .321, 240, 244
HRC................. .350, .339, 254, 256
GT Thunder....... .350, .345, 256, 256
WB Track.......... .350, .345, 256, 256
WB All Around.... .345, .335, 240, 248
WEB 450/451..... .350, .345, 256, 256
WEB 479........... .378, .378, 250, 250
WEB 463/9i....... .385, .370, 272, 270
Hotcams stg 1... .354, .354, 246, 246
Hotcams stg 2... .354, .350, 254, 248.5
HC stg 2 (old).... .348, .349, 254, 254
Hotcams stg 3 (stroker). .358, .354, 262, 257
Megacycle x1..... .346, .346, 246, 246
Megacycle X2..... .378, .378, 254, 254
Megacycle X6..... .402, .385, 270, 262

[sneaky11]

Thanks!! I'll probably go with the stage 3, durations seems to be little bit longer... probably better for helping keep the engine cooler...?

[250rforlife]

dude get the stage 2. i have one in myn and man its pretty good over stock. plus it gives ya alot of good usable power for the trail. perfect cam for what your doin and will be freindly with that motor setup you wanna do.

[DaleJrFan]

I have had both in and multiple times and prefer the stage 2, just get the all around performance that I want.

[sneaky11]

Originally posted by Longdong
Stage 3 is not a drop-in cam. You need harden rockers and heavy duty springs to match

Part No. hc10513trx Manufacturer Hot Cams
Car Make Honda Quad / ATV / UTV Component TRX 400EX, Camshafts
TRX 400EX (1999-2007) TRX 400EX Stage 3: single-cam motor. More top-end power. Designed specifically for Hot Rods big bore stroker kit. Uses stock valve springs and rockers. *Does not use auto-decompression mechanism. Stock starter sufficient.


But, maybe stoke springs can wear out faster with that kind of lift!! Anyway I got a set of kibblewhites in a box...

The only things I'll be worry about is to make that thing spinning with the stage 3, the lighten flywheel and no decomp on a 12.5:1... even with the stage 2?? Can I have problems?

[Longdong]

[QUOTE]Originally posted by sneaky11
[B]Part No. hc10513trx Manufacturer Hot Cams
Car Make Honda Quad / ATV / UTV Component TRX 400EX, Camshafts
TRX 400EX (1999-2007) TRX 400EX Stage 3: single-cam motor. More top-end power. Designed specifically for Hot Rods big bore stroker kit. Uses stock valve springs and rockers. *Does not use auto-decompression mechanism. Stock starter sufficient.

You are right! I miss read one of my parts catalogs. Thanks for correcting me.

[jensenracing77]

Originally posted by NacsMXer
Stage 2 Hotcam would be perfect for your setup. Stage 3 Hotcam if you want a bigger hit in the top end. Both are drop in cams. The stage 3 is about as high lift as they come for drop in cams.

Here's some specs if you want to compare. I have never been able to find any specs for Magnum cams so I couldn't tell you anything about them.


cam: Intake lift; Exhaust lift; Intake duration; Exhaust duration

stock............... .316, .302, 234, 238

XR400.............. .326, .321, 240, 244
HRC................. .350, .339, 254, 256
GT Thunder....... .350, .345, 256, 256
WB Track.......... .350, .345, 256, 256
WB All Around.... .345, .335, 240, 248
WEB 450/451..... .350, .345, 256, 256
WEB 479........... .378, .378, 250, 250
WEB 463/9i....... .385, .370, 272, 270
Hotcams stg 1... .354, .354, 246, 246
Hotcams stg 2... .354, .350, 254, 248.5
HC stg 2 (old).... .348, .349, 254, 254
Hotcams stg 3 (stroker). .358, .354, 262, 257
Megacycle x1..... .346, .346, 246, 246
Megacycle X2..... .378, .378, 254, 254
Megacycle X6..... .402, .385, 270, 262

off topic..... would you happen to know what the lobe separation is for these cams?

[NacsMXer]

Just the intake/exhaust centerlines for the Hotcams. No lobe separation info for them or any others listed, sorry. I copied that a while ago from GPracer2500's post here.