Slow 1/4 and trap speed

[pharestutt]

I have a 98 corvette with 0411 pcm swap Ls1 with forged bottom end ,Magic stick 4 cam,ported polished 243s 2.02 valves, JBA 1 3/4 long tube headers, no cats,Fast 92/90 intake setup,K&N CAI, 3800 stall and 3.42 gears. I took the car out to the track yesterday and the best i could get out of it was a 12.2 @111 with a 1.78 60 ft, I imagine i should be deep in the 11s with trap speeds in the 120s can you guys take a look at my tune and a log of my best run i really need help.
fast92-ms4.hpt
jackson1.hpl

[5FDP]

Do you have a wideband hooked up at all??

Just curious because your o2's drop to 100mv at WOT and don't move much. The VE and MAF could use a touch up, VE has some choppyness to it still. These are just things I see.

[pharestutt]

Do you have a wideband hooked up at all??

Just curious because your o2's drop to 100mv at WOT and don't move much. The VE and MAF could use a touch up, VE has some choppyness to it still. These are just things I see.

i have a wide band but it wasn't hooked up i have to replace one of the connectors from where it dragged the ground. whats the problem with my o2 mv

[strokedcoupe]

I have a lq4 6.0 swapped is300 with similar mods but i have 3.90 gear 3200 stall.. my car 60fts a lil better but that 1.58 about runs about what I ran 12.13@112 .. I think your a lil lighter than me. but you really aren't that far off.. if you don't know your afr then it could be all tune.. 100 mv seems lean as crap which could be allot of it..

I have a 98 corvette with 0411 pcm swap Ls1 with forged bottom end ,Magic stick 4 cam,ported polished 243s 2.02 valves, JBA 1 3/4 long tube headers, no cats,Fast 92/90 intake setup,K&N CAI, 3800 stall and 3.42 gears. I took the car out to the track yesterday and the best i could get out of it was a 12.2 @111 with a 1.78 60 ft, I imagine i should be deep in the 11s with trap speeds in the 120s can you guys take a look at my tune and a log of my best run i really need help.
fast92-ms4.hpt
jackson1.hpl

[strokedcoupe]

oops 1.58 was nos 60ft.. 1.69 was motor 60ft..

[strokedcoupe]

have you dynode the car? hp number?

[pharestutt]

have you dynode the car? hp number?

i dont have any numbers but i assume it should be around 430 ish on the low side compared to what other cars with less mods have dynoed with this cam. this engine was also carbed and ran 7.0 in the 1/8 in a foxbody that weighed about what my car weighs.

[jaydubb71]

Question... How much compression? It doesnt appear that you have that much timing in it. I have more timing in my G8 and it has a 6.0 (L76, pretty much LS2 bottom end and LS3 heads).

[15PSI]

I am a Mustang guy but will just throw this in. When my car was an NA car, it weighed 3790 with me. It had 420 RWHP and best ET was 12.20 @ 116.

[pharestutt]

I am a Mustang guy but will just throw this in. When my car was an NA car, it weighed 3790 with me. It had 420 RWHP and best ET was 12.20 @ 116.

Lol Your making me feel worse My car weighs 3040 with me in it i weighed it yesterday at the track.

[madvapist]

Lol Your making me feel worse My car weighs 3040 with me in it i weighed it yesterday at the track.

Before i did the cam on my car i was at 340hp 360 tq and the best i did at the track was 12.5@113. You should be quicker than what you are.

[madvapist]

Just looked at your tune and you need to smooth your ve table and throw some more timing at it.

[ElecTech]

Do you have a wideband hooked up at all??

Just curious because your o2's drop to 100mv at WOT and don't move much. The VE and MAF could use a touch up, VE has some choppyness to it still. These are just things I see.

Listen to this ^^ guy. Your narrow band O2s indicate you are WAY too lean. Either that, or you have severe misfires or exhaust leaks on both banks. You need to get that fuel under control or it won't last long.

[pharestutt]

I went back over my maf and ve table . can yo guys look at my o2 voltages at Wot B1s1 is lean whiile B2s2 is not but at part throttle they are very similar what would cause this
fast92-ms4.hpt
4-22.hpl