New Best E.T. - Timeslip attached!
 

I also got video of the launch...but my camera cut out just before the 10 sec. car passed me. It's nice to know that there's still more in there. I'd like to think that the longtubes helped, but I also think that maybe a taller set of tires would help my MPH. This run was with my JMS chip running the ECU, and I short shifted into 2nd based on feel. I think that my combo makes power in the 3500-5800 rpm range, so if the skies clear up today and I get another shot at it I'm going to set shift points at 5800.

Thanks again to everyone who's helped over the years, especailly PKRWUD!!

Nice 60' - that's a low ET for that mph.

Yeah that's why I figured if I went to a taller tire I'd get more MPH. The launch is great but it dies after 80ft every time. I think that I'm moving beyond by RPM range by shifting at over 6K. I really would like to get her on a dyno!

Nice times! I wish I could get a 60' time that low.
-Ryan

I wish I could get that MPH up as high as yours

I was lucky in that I got this car from a previous owner minus engine, tranny, and good wiring. He was running 9's at over 145 so there was very little I needed to do with the suspension.

Yeah with a 393 you'd think you'd be running faster. What gear at what rpm are you going thru the traps at?
-Ryan

It's a 3-spd C4 so I'm in 3rd at around 5800 at the top end....but I don't know exactly. But when I made that 12.51 I shifted into second a bit lower in the RPM band based on feel. I have a lot of emmissions legal EFI 302 parts on her, including box stock Edlebrock heads, EFI, etc. There's certainly much room for improvement...but since I'm living in Mass. (and barely pass emmissions with cats) I don't want to mess around too much and lose my ability to drive on the street.

Ohh I see. You'd probably see a nice gain if you got rid of your cats. I know I did. Well you need dyno #'s but I would say going thru at 5800 is probably pretty close to where you want to be. Maybe a little high but you won't know for sure until you get those numbers. But hey keep up the good work at the track!
-Ryan

Hey Thanks...and YOU keep up the great work for this country!!

Yeah I will, thanks man!
-Ryan

Dont take my comment as being a jerk cause that is not how it is meant to sound.

You need to get to a dyno ASAP IMO. Your mph tells the whole story, for a 393 stroker it isnt making near the power it should.

I know two guys with 393 strokers both around 10 to 1 compression with box stock edelbrock heads, solid roller cams and a trick flow intake. Where I race the altitude often is around 5000ft. One of them runs a 10.86 @ 123 on motor. The other one wich is really mild runs a 11.92 @118mph on motor.

I would almost bet the cam is a tooth off or something.

I am with Dark on this one. I was trapping 109 with a stock 302 and cam!!

Thanks guys but wouldn't a tall tire (which I have) make a difference?

Would a car with a cam off a tooth turn a 1.6 60ft time? Take a look at the timeslip...it seems that I run out of power after 80ft. I figured small heads, and a small intake were the cause. I would love to get her on the dyno though.

I am not saying that your cam is a tooth off it is just my best guess. Yes a car with a cam that is a tooth off can still turn a good 60ft.

What RPM were you crossing at?

A 12.51 is quick but something just isnt right with your mph:confused:

Dyno that bad boy and lets figure this out.:D

Your car should be well capable of 114mph

Yeah...something isn't right but there isn't any dyno's local. I'd have to drive at least a couple hours and that would torture my 3 spd C4....I can't imagine making that tranny work so hard for so long. I often wonder if I should have went with the more street friendly 6 speed. Hindsight is always 20/20 :-)

I finally got my RPM's at the finish line...and I am a bit surprised. I crossed at 5200 RPM's doing 103 mph. I see 5.0's on juice doing high 11's....and I'd like to get my car into the low 12's on motor. Outside of a dyno...what can I do to make more power??

your heads are certainly the bottleneck of it all, but even so you should be getting a ton more mph than that. Hell, with GT40P heads on my 347 (huge bottleneck) I trapped 112mph. You've got better flowing heads, and 46 more cid!

Are you aware of where the timing is? Even if it is off a few degree's of where it "likes it" you will lose a lot of power. Have you read your plugs after a run to check how its running?

Another thing to consider is your torque converter. I helped build a car with a C4 recently, and the thing made a ton of torque down low, but just wouldn't pull up high. Well, we put it on a dyno and noticed that it made a peak of 350ft-lbs of torque at only 2800rpm (and was still climbing hard, ie, steep graph) but then the converter was crapping out and not allowing it to push any more power through.

Just another possibility.

Agreed, somethings WAY wrong. You should be running 116-120mph with that motor, your WAY down on HP, like 100 off. Time to start investigation.

I think that what is wrong is I went to mild on my setup becuase I wanted to make sure I could get a sticker. Let's take a look into the parts I have. With a 302 intake, 302 heads, and crossing the traps at a measly 520 RPM's, how could I possibly expect to make the type of power that is needed to run 120 MPH?? I think that when I built her I was focused too much on passing emissions. I'm happy to have a sticker and run 12's, rather than run 11's and have to trailer the car. But I'd like to think that I could get more out of what I have without spending thousands on Victor heads and Victor 5.8 EFI setup.