RTC 9's R out now ?

[sneaks12303]

So what is a RTC 9 ? I was expecting a 6 or maybe an 8.

 

[W5R]

They look the same as the 6/8 as far as port size/shape and valve sizes, retainer style sneaks?

 

[briggscrazy]

So you are saying that the RTC-9 head is not better than the 6 or 8. The same? I was ust getting ready to buy another motor

 

[sneaks12303]

I'm gonna send it to Dr. Dyno before I teardown .

 

[fasttommy]

The rtc 6 8 and 9 all have big valves. And the 8 has automotive style retainers. Correct

 

[sneaks12303]

The rtc 6 8 and 9 all have big valves. And the 8 has automotive style retainers. Correct

Looks like the 9 has auto retainers too

 

[fasttommy]

Does it have the bigger valves

 

[sneaks12303]

Does it have the bigger valves

Don't know yet . I'm gonna dyno first to get a base line .

 

[Jody / ARC Racing]

Got one on the table now. The head is the same as the RTC-8 with the spring seat area the same as a Clone head, not sunk like the RTC-6. 27/25 valves, 5mm stems with the same split locks and retainers. The ports on this one are real smooth and almost polished looking. Looks to be a good head to build with.

 

[sneaks12303]

Thanks JP . The castings on mine look great too . More Honda like . I'm thinking a new 32mm intake seat and that exhaust seat should cut out to 27mm ? A 32/27mm combo would B Killer . I just did one in a JT07