My car sucks!
If I found myself in a similar situation I would suspect one of the several happened:
1) Driver fault,
2) Bad tuning,
3) Suspension not matched with the power output.
Call Thunder and see what they have to say before tarnishing their reputation.
If read ALL the above, then do the right thing.
1st, if it hasnt been tuned, get it tuned.
2nd, with the stroker did you upgrade inj as well?
3rd, are you on stock heads, stock MAF, Stock this and that, like manifolds and y pipe?
4th, have you contacted Thunder to ask questions about your COMPLETE (all mods or lack there of) setup?
Dont be a Democrat (jackass) and bash anyone, sponsor or another user until you are willing to provide all information, and contact the person/company first.
Common Sense is leaving the building!
about tuning.the person who tuned my car also tuned several 383s and lots of ls1s and 1 supercharged 427 ls1.idont think the problem is about tuning.
other modifications.stage2 head and all other boltons,flp headers,xr-1 exhaust.no problem about them.
tuning at dyno: i live in Turkey and we dont have a dyno more than 400hp.so we tune at highway.we only guess about power by acceleration times.
before these mods when i had only head and cam 224/224 114ls i was able to have 60-125mph in 8.8 second and now about 8.6 seconds.no better times yet.
List ALL mods, do you have factory fuel pump & injectors? Facotry clutch? At that power potential the clutch wont last to long, even from a roll. And suspension and tires do play a role, just not as signiicant a factor compared to racing from a dig.
about tuning.the person who tuned my car also tuned several 383s and lots of ls1s and 1 supercharged 427 ls1.idont think the problem is about tuning.
other modifications.stage2 head and all other boltons,flp headers,xr-1 exhaust.no problem about them.
tuning at dyno: i live in Turkey and we dont have a dyno more than 400hp.so we tune at highway.we only guess about power by acceleration times.
before these mods when i had only head and cam 224/224 114ls i was able to have 60-125mph in 8.8 second and now about 8.6 seconds.no better times yet.
You need to get HP Tuner and a laptop. You can do live monitoring and adjustments. Basically street tuning with data recording.
What kind of injectors do you have, fuel pump? You should be in the neighbourhood of 450+ rwhp, too much for stock injectors and pump.
Like I said before, give us an itemised list of ALL your mods, then we can make suggestions.
The Best V8 Stories One Small Block at Time
As with all cars tho when you get something installed it needs to be correctly setup, have you had the fuel map on the ECU looked at or changed?
Perhaps it is the next GODZILLA 2 cam.
Perhaps it is the next GODZILLA 2 cam. 
I run standard OE cams on my car, but the 'mild' cams I could get for it start at 254 and 258, the normal choice being 278 degree and they go all the way up to 324 degree race cams.
http://www.kentcams.com/index.htm
I run standard OE cams on my car, but the 'mild' cams I could get for it start at 254 and 258, the normal choice being 278 degree and they go all the way up to 324 degree race cams.
http://www.kentcams.com/index.htm
I'm just suggesting " learn about LS1's." Find JRP (member) and read his sig. That will give you a basic idea about LS1 parameters.
Welcome to this board.
Perhaps it is the next GODZILLA 2 cam. 
https://ls1tech.com/forums/generation-iii-internal-engine/220732-car-alive-again.html
Cam could be ground wrong?
Car isnt tuned?
Maybe your making it up?
Maybe the guy in your lie cant drive?
Is it possible that you suck and not your car?
Check on the above things and get back to us. I wouls spend more time hitting the books then going online during 7th grade computer class if I were you.
I know im upset cause I cant be a corvette.
ie: road race. 
