Hey stephen, i finally got this junk mobile to go a little quicker,

last friday i pulled a 12.38 @ 112.61 mph with a 1.75 60'.....

i picked up almost 3 tenths and 1.7 mph since the last attempt.....

this being on a 5100rpm launch and shifting at 6000rpm.
(i think the 2 step helped out alot on that)

The air wasnt great either, it was pretty humid that night. So im sure i can get more power with better air, especially jetting up a bit on the carb.

it rained earlier that day too, and they dont put down any VHT before street nights at the track so the track was going away.....i chirped the mickey t's for the first time ever.

Finally pushing closer to the 11's
on my dyno tune i picked up about 17 peak hp, but i picked up damn near 20 ft/lbs avg all the way up the rpm band.....so thats sure to have made a difference (409.9hp, 383.3 ft/lbs rear wheell)

this is from a previous best of 12.65 at 110.82mph

Cool, good #'s. Good luck on the 11's. Where were you making peak torque on the dyno?

Good times. Can you give every detail and spec on your cam? Is it a roller cam?

around 5800.....im still being lazy and havent scanned in the dyno sheet yet

its a comp cams hydraulic roller,

lift - .640/.640
duration - 248 deg @.050
advertised 308 deg

i dont have the cam card in front of me right now, but its installed on a 110 intake centerline....i forget the LSA

Heres the dyno sheet....
the air/fuel curve is right, but the reading isnt, cause the probe wasnt warmed up on the 409.9hp pull.

Wow, good times, but with those numbers you should be 11s. I think you have more in the car, just need to get it all right and your there high 11s!

The lobe seperation is very important. The more cubes you have the tighter the LS needs to be. I think I read an article about a 406 with AFR heads gained around 25hp just from changing the LS from 110 to 106. EFI cars like around 112LS, but carb cars like less. You have a lot of duration, I think you would make a little more low end with the 236/242 Comp grind.

I think your car should be making peak hp a little higher with your cam, but maybe it's the cubes that make it peak lower. I think your best bet would be to go with a solid roller if you're looking for more hp. From what I've read you'd probably gain another 30-40rwhp from going to a similarly specced solid roller. The lifters are much lighter and I think your lifters can't take the amount of hyd roller cam you have. The advertised dur. will be less with a solid roller compared to a hyd roller, which would make your car feel like it had a smaller cam and it would idle smoother. Solid roller is the way to go for a hot street setup. I'm just learning this.

ya its tuning, and driving issues now i think, im gettin there

Yeah, I was looking at your 12.6 and that seems off big time. My dad pulled the same 12.6 but at 108 with 268 rwhp!

I see a mid 11 out of your car! Good luck getting it all sorted out!

thanks man, thats what ive been sayin all along......we're off to new england dragway again tomorrow night to try again

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Just a question, but are your heads even capable of flowing up to that lift? I would think with your trap speed they aren't and your cam might actually be hurting you more than helping you. That cam is HUGE, maybe even too big. Looks like you should be shifting a little past 6,000 too.

What kind of car are you talking about?? There's not one street-weight thirdgen like 383backinblack's car that's going to run that et and mph with that much rwhp. Uh uh, no way!

AFR 210's....fully cnc ported, angle cut 0-.125, chambers cc'd to 63.5 cc's.......they flow plenty

Any flow #'s for those heads? I dunno man, somethin doesnt seem right. With that cam, and if your heads flow as well as you say they do ontop of a 383, you should be making more rwhp than that. Check out my post on the tech board. My heads flow a lot and my cam only has a .564 lift with less duration and I should be pushing around 430 rwhp with almost 40 less cubes than you. Tuning may be a big reason in why you arent in the 11's, but even with those dyno #'s with that setup I have no doubt you should easily run 11's as is.

Like I said before, I really think you're at the stage to switch over to a solid roller setup. A solid Roller setup with the same dur. at .050 lift as your current cam will actually have less advertised duration at .006 lift. Your advertised dur. is 308 now, with a solid roller it would be around 298. That would help with more low end tq, because the ramp rates are much quicker, although they're awesome now with you high lift hydraulic roller, but the real reason is that the S.R. cam is better is the much lighter solid roller lifters. With this cam your car should rev to the moon. I'm sure you know all about this, but it's good to re-emphasize certain points. You obviously have done your homework, because your setup is matched properly and you picked out the best heads.

Another thing I was thinking about is have you measured the spring rates of your valvesprings? This may be the reason why your car isn't making peak hp at a higher rpm.

Congrats! I'm gunning for the 11's with ya, last night I took a big step towards them. I put in a cutout and found 25 HP. Good luck to ya!

The valve springs are brand new, and spec'd to the cam....triple springs