Ok, brief history......rebuilt Jasper motor (less then 5k on it), New Opti spark, plugs, wires, cap & rotor, etc. ORIGINAL Fuel Injectors, coil and Intake, MAF, VB and Fuel Pump(from what I can gather). All of those parts have approx 170,000 miles on them! Car has MAC mids, gutted cat, Hooker Cat back, CAI, 1LE bellow, TB Air Foil, rebuilt trans with shift kit and 2500 stall, 3.42 rear and PCMFORLESS tune by Bryan.
Englishtown didn't have the temp and humidity listed on the time slips, so I can only tell you it was about 70* and 80% humidity off the Weather Chanel when I got home and checked it. 1st run 60' 2.059 1/8 9.080/77.80 mph 1/4 14.113/97.83 mph. Temp was a few *'s higher at that time and I just got to the track after a 45 mile drive. 2nd run is a waste, smoked tires out of the whole. 3rd pass 60' 1.986 1/8 8.911/78.66 1/4 13.905/98.57 mph.
The last run I raced a 93/97 Z28 Auto with just a catback & CAI and he ran 14.001/100.25 mph! WTF? LOL When I was running, I noticed a slight missfire above 47-4800 rpm's and when the car shifts into 3rd, it seems to fall flat for a few hundred rpm's and then picks up & goes again. I don't know if it's the gears making it shift a few hundred RPM's short of it's power band OR if the TC is locking as soon as it hits 3rd? I know this is a very broad post, but I was wondering if anyone had any input? LOL
Mike
BTW I have access to a Snap On Modis scanner if that would help in any way.

 

Any suggestions? LOL

 

i don't know what to tell you. i'm in shock. let me think about this one for a little while.

 

I ran 13.4 @103 with 373 gears, shift kit, CAI, Pacesetter LTs, and spinning Nitto drag radials off the line. You may want to look into some nice tires to give you a better launch, and maybe some 3.73s. Also some long tube headers wouldn't hurt. Is your car running ok though? Any stumbles or hesistations?

 

I went with the 3.42's because I'm on the GSP for about 50 miles everyday! LOL As far as the tires & launch, I got brand new Kuhmo Excsta ASX all around and I got a 1.986 with that setup! LOL I have the stock rims & I was thinking about going with some BFG DR's just for the track. My old 95 Z28 M6 with a little LESS mods then this one, ran a 13.123 @ 107 mph with a 2.0 60' with Pep Boys Futura tires! LOL This car just seems to be lacking something in the Upper RPM's. It's an animal off the line.
Over 47-4800 RPM's there is a SLIGHTmiss. Not real pronounced, but it's there. I'm putting a new coil in right now to see if that helps it at all. All the wires are attached, clear of the headers, air bellow is on tight, no leaks by the MAF.......When I came to work this morning I did not feel the drop in 3rd gear, but it was nice & cool this morning! Later we're going to take it for a spin with a Snap-on Modis scanner and see what we can see. I'll keep you posted! Thanks for the replies!
Mike

 

I went 13.40 with my setup. That's 3.73's, K&N, headers, full exhaust, programming and stock tires in good weather. The humidity could've been a factor for you. But the miss is something to consider. Maybe you've got an ignition problem somewhere. Bad wire/plug.

Humidity can also be a HUGE factor though. It's better to run comparisons in similiar weather.

 

I'm thinking you have an ignition problem. Even a "slight" miss could be a big one and causing big problems. Get the modis and look at your miss counts and find out which cylinder is missing.

My car runs 12s with much less mods.

 

What do you expect to be running... what are the specs on the motor?

 

stock motor with those mods and the 60's you were pulling -

with the humidity, id say your times were a bit higher than they should be, but doesnt seem too drastic. maybe 3/10's or so.

go on a cooler night with less humidity- give your car a chance to really cool down and i figure out the miss and id say you'd be hitting mid (maybe 13.4's) which is right where you should be with those mods

 

Motor is basically a stock rebuild, nothing out of the ordinary. I went Jasper purely for the warranty and customer service, not for the performance. Although the Jasper rep said he was certain that their motor would make more power then stock! LOL
What do I expect to be running? Almost exactly what kingman109 said....about 13.4ish @ 102ish.

I installed the new coil yesterday.......I didn't "feel" any miss, but we were too busy at the shop to take a ride with the scanner hooked up to it. That may have to wait untill Monday. Thanks for all the input!
Mike

 

i would say replace the stuff that you named as original...with 170k on those parts, they are worn out and not helping you a bit. It couldnt hurt, all it could do is make things better. Just my opinion but im nobody.

 

completely agree



damn straight who asked you anyway


lol - so i tried filming a 0-150 run today, and had no friends around. so i tried making a mount for the camera between my seats and couldnt get a clean shot. so then i tried mounting the camera on the steering column and had a sweet shot of speedo. then common sense kicked in and i realized that was probably the most retarded idea ever. lol

 

Scanner is broken!
I'm going to start replacing old things one at a time as $ permits. I wasn't expecting a whole lot from the car, but I wanted to be MUCH closer to that magic 12.xx! I was hoping to get close enough that I just needed to do some suspension or traction mods to hit that mark. But my MPH is NOWHERE near a 12.xx trapspeed! I just keep plugging away at it till I get it! I'm going to wait till October to run it again for a cool night and see.
Oh well, Snap On is supposed to be here on Wednesday to look at the scanner. I guess I will have to wait till at least then.
Mike

 

This noob suggests...

1. Have injectors flushed out.
2. Have ignition scoped.
3. Check fuel pressure with engine under load.
4. Consider there's a problem with the torque converter.

I agree that you should be running around 13 flat with your mods. I don't think there's any way the weather could be responsible for running that slow, with the mods you have.