Juanra

Can anybody tell me the experiences you have had with these cams and other regrind cams for the beta engine. How did the engine react? Power gains? ETC

DCL

Also interested in this.. some guys must know?

JonGTR

I can't answer your specific question, but I can tell you that you need to always check the cam regrinds for exactness and durability. I'm not 100% sure if it was Colt, but in the Z scene, we've seen several cams that had the welds flake off, and the tolerances were subpar.

Break out the micrometer to check the lobes, and look under your valve cover periodically for wear.

mousepad

any gains noticed? i'm quite interested in purchasing too. i'm just trying to find that one article that would either make or break my decision..

Sonique

I did a camshaft regrind for a couple of months ago, for my 97 tiburon.. quite simular to the colt cams profile, although a bit moe aggressive. I definitively notice the gains, however, ECU upgrade is needed to get the full potential from it. Therefor I'm working on a MS2 standalone for my car.



Listen to the idle I got:



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With colt cams, 4-2-1 headers and megasquirt, KFX performance managed to get 156.1whp and 139.9 tq. from a beta1..

Juanra

Sorry but I have seen 160+ HP with OEM cams a few times...

Sonique

On the wheels? If so, the engine is seriously modded ..



However.. don't know the gains I got from my regrind without messing with the ECU, but it's probably not very much (and it's at high rpm's only)

mousepad

juanra, what other mods did you see on the 160+ cars without the cams?

sonique, thanks for the feedback!



i'm a noob, so more questions, sorry



do the Colt cams and the 1.8 cams perform the same? what's recommended for low-mid / useable gains? and lastly, is it required to swap the 1.8ECU with the 2.0ECU when running 1.8 cams? thanks for the help!

Sonique

No.. the 1.8 cam is just an intake cam (if used on the beta engine), while colt regrind is both intake and exhaust. Also, the 1.8 profile is not that much different from the original. If I've been told right, it was used in the Hyundai F2 evolution RD coupe. The 1.8 cam does not require any ECU mods, but I don't think you will notice the gains much by just changing this cam. (BTW.. I don't know much about the 1.8l engine used in the US)



This is my profile vs the original profile.. as you can see, it's quite different



Original BETA 1 Shafts



Inlet:

Duration: 238 degrees

Lift: 8mm



Exhaust:

Duration: 250 degrees

Lift: 9mm





My regrind (had to use lash caps):



Inlet:

Duration: 275 degrees

Lift: 10.1mm



Exhaust

Duration: 275 degrees

Lift: 10.1mm



and these are the specs for the colt camshafts: " 268 with 340 lift. the secondary lobe on the intake is 264 with 335 lift. the exhaust is straight up 264 with 335 lift."

wheel_of_steel

dude, that's actually a decent idle for 275/275 cams. how did they affect your power curve? is the car enjoyable to drive?