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robjohn74
06-20-2004, 07:41 AM
what kit would be the better one and i am looking for more speed and power.. thank you
TC426EX
06-20-2004, 09:59 AM
425 man, its the biggest bore you can do without resleeving. I have a worked 425 and it hauls....
Giz400ex
06-20-2004, 06:49 PM
I had a 406 and just today:D , I installed the 425 from TC and its a little to early to tell but she seems a little bit more torquer (sp?) The only thing I did was the boring and the 425 piston. I was already set with cam ect.. I skipped the 416 and should of skipped the 406 but next time I'll know. Go right to the 425!!!
robjohn74
06-20-2004, 08:48 PM
sweet.. thanks alot do you no what kind of hp i could get out of it ....
TC426EX
06-20-2004, 08:57 PM
With all the mods in my sig I'm running about 48HP. I had it dynoed at GT thunder so its not like Im makin' it up...
robjohn74
06-20-2004, 09:02 PM
sounds sweet to me thank you... ride hard
Chanman420q
06-21-2004, 01:06 AM
go 416, they rev a lot quicker than the 425 and make similiar power, where talking to the decible. ull be happy with either one but its safer for the 416. u can still bore it again. with the 425 u either have to sleeve it to a 440 or start all over again. and as far as TC who has close to 50hp, his was also built by an engine builder. so dont expect to see numbers like his on yours just because its the same bore
06-21-2004, 08:01 AM
The 416 will be more reliable and there's really not that much of a difference in HP numbers between the 2.

I rode a fully built TC 416 national kit motor, dude jacked up the cylinder and had to go to a 426, rode it again and could tell no difference in power. It was fast as a 416 and fast a 426 but after the 426 your lookin at lotso money to fix the motor since it's on it's last bore of the stock sleeve.
Pappy
06-21-2004, 08:08 AM
Originally posted by TC426EX
425 man, its the biggest bore you can do without resleeving. I have a worked 425 and it hauls....

why would you recommend an overbore to a 425/426 when its not needed and for all intensive purposes will make the same power:confused:
TC426EX
06-21-2004, 08:59 AM
I never rode a 416, and can only reccomend what I have experience with. Really, I wanted to go 440 but Tom reccomended the 425 kit for me for reliability and also since it is the biggest bore on the stock sleeve. I figured there would be a little increase in the 425 kit over the 416, but I didnt know. Its not like its THAT expensive to bore and sleeve a 440 kit anyway so I guess I just think differently. If the power is similar and you want to save another bore for the future then by all means get the 416, its whatever you want man...