what times to run?

[riceater89-5.0]

i have an 89 306 5 speed hatchwith about 4000miles since rebuild. i have a comp cam .540lift k&n filter 70 mm throttle body 190 fuel pump 373 rear, bbk headers, american thunder flows, a/c delete, and whatever cooling system the guy bfor me put in it is workin, cause my engine never gets above 150 degrees. im runnin on 205/75/15 piece of garbage tires. last time i went to the local 1/8th mile track, i ran a best of 9.2, which i thought ot be very impressive considering i spun all the way through 1-3rd gear. i think if i run slicks, and im fortunate enough not to break anything, i think i could get a half second better. a couple of my friends think i would be lucky to hit 9.0, even with slicks, what do u think?

 

[Js5ohLX]

what heads?

 

[riceater89-5.0]

stock heads and intake, thats not really what im askin u to look at though, its more about how much i was spinnining on street tires, and how well i could hook up with slicks, thats whats gonna make the time up. ive heard, dont know for a fact, that every time u cherp your tires u lose a tenth, if thats the case, or even close to the case, it shouldnt be so hard to believe i can make up some serious time with slicks, right?

 

[maverick0716]

Yeah, of course it'll be way better with slicks. Probably at least a couple tenths in the 1/8th.......One thing about your combo scares me though.......540 lift cam on stock heads!? Holy ****!! How are they still alive? Do you get major valve float?

 

[riceater89-5.0]

a COUPLE of tenths sucks though, that still leaves me with jus a 9.0.... i think i could pick up a couple on wider street tires, i was hoping to hear from someone who thought i could touch 8's anyway, jus so it wouldnt seem so far out there that i thought that way, and no i dont have valve float, ive hit 7000rpm about 4 times an never had a problem, no chatter, nothing. i figured the guy bfor me probly did have head work done, but whatever he did, he didi it to the stock heads, and it works well.

 

[Mean88]

If that was your stock tack reading 7000 rpm, it wasnt 7k, closer to 6k. I have an autometer right along side my stock one, and 7kon the stock tach =6k on the autometer.

 

[Mean88]

BTW: the stock computer rev limit is 6250 rpm.

 

[cleanLX]

What elevation is your track at?
I've run 8.2 in the 1/8th with stock motor, and tb N/A in 2600 d/a conditions.

 

[riceater89-5.0]

i have no idea what the elevation is. if the rpm is off that far at 6 or 7, is it that far off all the way through the rpm range? or does the gap get bigger as the rpms go up?