difference in these cams?

[coatesy]

http://www.greydevilindustries.com/products/product.asp?id=21010
whats the difference in these cams as the rally 1's u need to do alot of work to the engine for these?

 

[coatesy]

anyone

 

[mx1_champ]

u may need pocketed pistons but depends on the profiles . the best people to ask would be the sellers. and you will need a map and some vernier pullies to get everything set bang on.

 

[Andy GDI]

Call me at work tomorrow and i can explain...

Andy
01480 860001

 

[crazycup_racer]

The rally cams are cat 422's. The Less wild ones are the 421's. I brought this up a while back when on the phone to qep. Dont know to much other than that, weather GDI reprofile them to there spec?? but the 422's are what they are based on. And from what i heard they lift that much extra that they would run to much overlap. Is that right lol?? :S

 

[sideways danny]

we dont use 421s, we generally use 428s on engines with stock internals and 422s on high compression/race builds