My car hasn't had a tune, so here is the results.
Temp was 85 deg. F, engine temp was around 190)
I have to use 4th, tried riding 3rd out one time, hit rev limiter set at 6000 RPM

1.971 60 ft (first ever sub 2.0xx 60 ft. time)
8.519 1/8 mile ET (best yet)
84.909 1/8 mile MPH (84.947 best)
13.226 1/4 mile ET (best yet)
105.391 1/4 mile MPH (106.770 best--on 50 psi, I lowered after friend seeing black smoke)

Shifting at around 5500 RPM, down from 5800 RPM.
BFG G-Force TA KDW 275/40/17

383 stroker @ 9.5:1
Super Ram plenum,runners & base
58 mm TB
Comp Cam 222/226 dur. 0.464/0.464 114 LSA (very mild--want hotcam)
SCAT crank
Eagle rods
Clevite 77 bearings
Keith Black forged pistons
K&N with cut lid
Walbro GSS340M 255Lph fuel pump with Racetronix hot wire kit
Modified MAF (screens and heat sink removed)
#113 D Port Aluminum heads (ported and polished)
Hooker #2149
Air pump eliminator
MSD 6AL
Taylor Spiro Pro
NGK TR6 @ 0.038"
Ed Wright chip before some mods
Frisbee removed
TB Bypass
180 T-Stat
Fan switch
Moroso Accumulator Oil Sump
True duals 2.5"
Flowmasters (40 series 2 chamber 2 1/2" in 3" out)
Centerforce Dual Friction Clutch
DRM Aluminum single mass flywheel
ZF Doc C4 Beam Plates
3.31:1 rear gear Dana 44
6 speed
B&M Ripper Shifter (talk about short throws!!)
Z51 option
VR1 Racing Formula 20w50 Valvoline Oil -- 7 Liters (Accusump larger volume)
Car runs at 175-180 highway, 180-190 town driving.

Okay, my mind is drawing a blank on other mods I have. I know not all are needed, but when I started, I figured I'd give as much info as possible.



[Modified by black_89_vette, 2:15 AM 9/3/2003]

 

Either i'm missing something or somethin is really wrong with the tune of that engine, a SR 383 should be in the very low 12s, no worse than 12.5 on a street tire, and 11s a good set of tires.

 

Like I said, I need a tune or take it to someone who knows what they're doing.

Maybe I should pay Jesse a visit in PA, hehe.
What, it's only a 7 hour drive probably :crazy:

***EDIT***
By the way, when I was at the track, a 405 HP Z06 ( 2002 or 2003, couldnt' tell) and a 2002 LS1 C5 show up. Later, their friend showed up in a 2001 Viper painted Hella Cool Orange (not paint code, just looked hella cool!)

I ran against the Z06 which ran a 12.659 @ 113.757 MPH supposedly stock.
The Viper ran a 12.5 supposedly stock.
The LS1 ran a 11.4 at 123 or so squirting 150 hp on a modded motor. He was hooking 1.72-1.80 on Nitto drag radials.

I was a little frustrated, cuz I know my car should be running better than it is.


[Modified by black_89_vette, 2:01 AM 9/3/2003]

 

What kind of valve train resides in those ported heads? If it doesn't have 1.6RR you should add them and do some more valve train work.

I think you should be shifting around 6,000rpm or higher if the valve train will handle it.

 

Right now, they are the stock sized valves (1.94/1.50) and the 1.5 rockers I believe.

I do want to switch to 1.6 RR's, I believe it already has a 3 angle valve job done on the heads, what more valve train work would you recommend.

I had the car up to 6300 RPM's before, but it didn't seem to be doing much at that high of an RPM. I was shifting at 5800 but then last time I decided to try for 5500, to see if it yielded much of a difference, and I figured it'd be a little easier on my motor.

My ET's did drop a bit, and my MPH rose a bit, but I'm still far from what I wanted to be at.

I really gotta mount those drag radials so I can launch the car.

 

Something is definitely amiss. You traps are really low for a superrammed 383. I was running 104mph traps when my car had only exhaust and RR's installed. My guess would be those heads are holding you back some. If money permits, I would buy a nice set of Trickflow 23deg. heads. They flow really well and won't break the bank at $900 fully assembled. If not heads, then I would atleast by a good set of 1.6 aluminum RR's. Those should bring your lift to around .494. How about your valve springs? Are they stock or have they been replaced? Finally, get a good tune. Get a chip burned. I heard Ski_dwn_it is the man when it comes to that. Also, take your car to a dyno and have it tuned with a wideband. BTW, what type of injectors are you running???? Good luck :cheers:

 

I see you have an Ed Wright chip in the car. If that chip was done early in your modding I'd say you defintly are in need of a new custom chip.

 

Well, the L-98 heads are pretty good for what you're doing.

I would say that camshaft you have may be the culprit. It has good duration, but low lift and LSA. It seems to be for a TPI motor with a TPI on top, not your superram. That's why your car is running out of breath at the top end like you said. If I were you I would get a cam like the hotcam or the CC-305 (or CC-306 if you don't mind giving up some drivability.) This would probably make the biggest improvement as all the other pieces seem to be in place.

Another thing is that Aluminum flywheel is killing you as far as drag racing is concerned. They're good for road racing when you have to stay in gear and want to accelerate coming out of a corner, but for drag racing they have no momentum so your enbgine gets pulled down with every shift.

Actually, for that small camshaft your car is putting out some good power. But it's not for a super ram.
Good luck.

-Dave C.




[Modified by Dave C. '97 Z28, 9:02 PM 9/3/2003]

 

Oops, forgot to write that down.

I'm using Ford MotorSports 30 # injectors and I was running them at 50 PSI, but dropped them down to 45 PSI.

I'm not even sure if they should be even that high.

 

I bet that bitch is running hella rich. Esp. if your friend saw black smoke then you're still on the rich side. For being out of tune 106 isn't all that bad considering how hot it was.

 

If anything at least do this on the intake side. The D-Port heads have a pretty good intake/exhaust ratio to begin with. You've got a little more duration on the exhaust side of the cam so that is going to even things out a hair more also. Get some 1.6s on the intake side, tighten em' up to 0-last + 1/4 turn and see what happens.

I definitely think 6300 is a major waste of time with that cam on a 383 if your heads aren't seriously ported.

 

Ya, it was really rich with him seeing black smoke. After that run, I dropped the psi down to 45 which eliminated the black smoke. I could feel the car running better too with the lower pressure.

I had it up to 6300 RPM once, only to find how well it pulled. It wasn't doing anything, so I set the limiter at 6000 and started shifting at 5800. This last time at the track, I was shifting at 5500.

Hell, I don't even know when the best time to shift it really is.

I don't have any #'s from the port job, but the machinist does all the Pro Mods on the dirt tracks and stuff. I've heard he's really good at what he does, and he did say my heads were done well.

****EDIT****
So, from what I see, I really need the 1.6 RR's, either HotCam or CC305 (is CC306 too big?), and valve train work like springs and such.

Any part #'s or suggestions there?


[Modified by black_89_vette, 11:49 PM 9/3/2003]

 

AND..... what would you recommend for injector PSI?


At 50 PSI, I was smoking, and 45 I'm not.

But, I've heard of people putting out more power on smaller injectors using lower psi that me.

So, should I be closer to 40 PSI or lower?

 

Ford rates all there injectors at 39 psi. Chevy rates at 43.5 psi. Since your running Ford's I would lower fuel pressure to the factory recommended 39 psi. Remember leaner is meaner, just not to lean :lol:


[Modified by NUckINg FuTS, 11:19 PM 9/3/2003]

 

What's the elevation at the track, how high above sea level?

 

I believe the altitude is about 200 ft. above sea level.

http://www.luskvilledragway.com


I will try dropping the pressure down to 39 or 40. What problems if any could appear from dropping it to that pressure, if any?

 

The only problem is it will make your car go faster, if that's even a problem. 39psi may sound low, but your injectors were made to operate at that pressure. :yesnod:

 

If your running 30lb/hr injectors and haven't retuned for them (my god, man!), then that's your problem. To get the same fuel flow as a 24lb/hr @ 43psi, you'd have to run your pressure at ~25 psi, which would make for poor atomization. Or if your PCM is tuned for 22lb/hr, it's even less.

Just get the thing tuned for the larger injectors or throw some correct ones on there for what your PCM is tuned for.


-Dave C.



[Modified by Dave C. '97 Z28, 5:53 PM 9/4/2003]

 

Since initial ED Wright chip, I installed...

MSD 6AL
NGK TR6
8mm Taylor Spiro Pro
30 # FMS injectors

Yeah, I guess it's time for a tune, lol.

 

Yup, there's your problem. Your computer doesn't know you have 30# injectors installed. Send your chip back to Ed Wright and get it reprogrammed for bigger injectors.