- Local time
- 11:20 AM
- Dec 8, 2014
- Reaction score
- Sweden Jonkoping
If you take a look at my post no 157. I have the same issue, feels slow at the top end.Hi guys, sorry for delay.
I'm running Mickey Thompson pro bracket radials 28 tall x 9 wide, 13-16 psi. It hooks good and does not lose traction at launch. The tires wrinkle and seem to stay glued. I have increased tire pressure to 18 psi and it did spin pretty good st the line. MT tech line told me 13-16psi for MT PBRs....I shift at 5500 rpm and go thru the lights at roughly 6200 rpm.
The car pulls strong thru the 1/8 th but beyond that it seems to lay down. It doesn't pull hard beyond the 1000 foot mark. Its not wimpy, just stops pulling. No misses or sputtering. Throttle response is excellent. The car does not have a cage as of yet. I'm still contemplating whether to install a cage on a real RS vert. I'm not worried about getting kicked out of track yet. I also think I should be mid to high 11s. I get 7-8 psi at fuel regulator and carb seems right on.
Do u guys think the 60 foot time reflects a 11 sec car? I think the cam is small at 509. I used to have 915 heads un ported and it ran 12.20-12.30s. Adding aluminum SEZs and roller rockers, it dropped to 12.07. But, I'm not overly thrilled at 12 00s either.
Currently, I have approximately 11.5 to 1 compression, give or take. I did not actually measure comp. I'm running 039" head gasket, about .010 in the hole at TDC, with 75cc chambers. Race Tec catalogue and tech info puts me at approximately 11.5 to 1 w/ .060 over flat tops.
I will swap my hydraulic cam with a solid at 250-260 at. 050 and 0.55-0.6 lift.