VIPER EATER

iTrader: (1)

ok guys well i got my th400 swap done and took her to the track on friday and well im kinda dissappointed... anyways here is whats done to the car
2001 camaro ss
lq4 block .030 over
eagle 4.000 forged crank, callies compstar 6.125 h beams, and mahle -12cc pistons (10.5.1)
"cleaned up" 853's with prc platnium springs
stock LS6 intake and TB
SVO 30lbs
ngk tr6's
TSP mini-stick 235/240 .603/.609 112lsa
slp LT's
clevite h series bearings
th 400 w/ 3000 stall, quarter stick
12 bolt/ 4.10s
sphon torque arm
lakewood lca's

ok guys here is where im confused, recently our track here in spokane wa went from a private owned drag strip to a NHRA sanctioned track. new clocks, concrete lauchpad past the 660' mark and new clocks. now from what ive heard is that the old clocks were 3-5 tenths faster than the new ones we have now but im not completly sure on this. but here is my question with the old clocks the car went a best of 11.98@117 with a 1.78 60' and this last friday the first time out with the th400 and the new clocks this is what she ran

R/T .120 - .187 - .191 - .073 - .037
60' 1.809 - 1.888 - 1.911 - 1.894 - 1.838
1/8 8.149 - 8.166 - 8.325 - 8.232 - 8.145
MPH 85.76 - 86.19 - 84.44 - 85.71 - 85.62
1/4 12.693 - 12.696 - 12.932 - 12.777 - 12.691
MPH 108.59 - 108.78 - 107.15 - 108.66 - 108.70
1st Pass - 2nd pass - 3rd pass- 4th pass - 5th pass



R/T - .108 - .061 - .023
60' - 1.947 - 1.979 - 1.865
1/8 - 8.225 - 8.274 - 8.205
MPH - 86.10 - 86.08 - 85.82
1/4 - 12.748 - 12.802 - 12.744
MPH - 108.99 - 108.97 - 108.67
6th pass - 7th pass - 8th pass


my question to you guys is what do you think would make the car run 7 tenths off of what it ran with the 6 speed and why would it loose 9mph??? a buddy of mine that owns a speed shop here in spokane said he could see it loosing 4-5 mph from the th400 but not 9 mph. the car has been sitting for 2 years with no battery and it now has a hard start issue.(cycle key on/off 3-4 times) then she starts im just wondering if it lost the tune or not??? im sorry this is so long guys but any input on what you think i should look at would be appreciated.
thanks Jason

ndfrsd6

iTrader: (5)

i just switched from a M6 to a th400 and i gained 2 mph ! and cut .4 off my time right off the tailor with no real testing ......is your converter right for your car 3000 seems low for a th400 setup im a 5200 stall .....just a thought

ndfrsd6

iTrader: (5)

also what tire you running ?

99LS6SS

iTrader: (4)

I'd say stall as well...doesn't seem like it goes well with what you have.

StreetSilverado

iTrader: (17)

Stall and heads..

blackLS1m6

iTrader: (14)

I would go with a bigger converter too like these guys said. I noticed you mentioned that you have to key the car 3-4 times before it starts, it sounds like an issue with the fuel pump or fuel pressure regulator. Since it has been sitting for two years i would check the car over mechanically before you start making changes. Good luck!

99LS6SS

iTrader: (4)

def heads and intake...I read on here the other day about a 408 with i believe the same heads and intake and they changed them out for a fast 92/92 and TFS heads and it picked up 73HP. I'd say something like that and a big stall would run real good together

VIPER EATER

iTrader: (1)

sorry its been awhile since ive been on here guys i hurt my knee pretty bad lol well anyway its a full street car so that why i went to a 3000 stall and its got a walbro 255 intank and i know it needs heads but on the old clocks and it being a 6 speed it went 12.0@ 117 so im confused on how it lost 9 mph and lost 5-8 tenths. and as for the starting issue after we had jason at texas speed tune it we had no starting issues at all. its like it has a stock tune in it

ndfrsd6

iTrader: (5)

im still saying its your converter but thats just my opinion even for a street car 3000 seems really low for a 3 speed setup i would go with a 4000 stall min ....
and just curious why you would choose a th400 over a 4l60 for the street .....

7420NW7TH

iTrader: (8)

I good strong 408 should run at least low 11's. Mine runs 11.11 at a race weight of 3700 lbs, and through full exhaust, cats, etc. One thing that stuck out at me is you are running 30# injectors. I've gt 42# SVO injectors. Sure 30# is enough? Also, who is your stall manufacturer? I got almost a full second quciker in the 1/4 simply by changing stalls and going with a Yank. The other stall I had was a POS. You really get what you pay for when buying stalls.

7420NW7TH

iTrader: (8)

Even with a 3000 stall your trap speed should be alot higher than that. I think you have more than one problem there, but it definitely sounds like torque converter efficiency is one of them. I'd take another look at your injectors as well.

stumprrp

iTrader: (2)

I think the intake and heads are choking the motor.. Put down nice torque thought

tektrans

iTrader: (23)

convert is probably way off, I didn't like the 30lbers either.
could be a bad coil pack/ wire etc. as well.
I had a bad coil pack and I lost like 7 tenths and 10 mph.

VIPER EATER

iTrader: (1)

well guys ive come to the conclusion that the tune is not in it anymore i drove it on the street yesterday and as i got on it, it bounced off the rev limiter at 6300 rpm's??? what is the stock limiter set at?? isnt 62 or 6300??? when my old friend tuned the car for us he set the rev limiter at 7200(never used it) but now its bouncing off at 6300??? i think the guy who tuned it and was storing it for us got mad that i picked the car up and worked on it somewhere else so before i picked the car up i think he reflashed the computer. mechanically the car is fine the only code the ses light is for is because the vss isnt hooked up.

kmracer

iTrader: (1)

stock limiter is 6200, yes.

RacerXLs1

iTrader: (14)

I agree with everyone above.. The conveter seems some.. I would at least get a 4000 imp.... But thats just my 0.02's

camarorat

iTrader: (8)

I ran a 12.70 108MPH with a stock ls1 with headers, 3200 stall,. I would hope that you would be in the mid/low 11's with a 408. What heads are you running?

VIPER EATER

iTrader: (1)

the heads im running are a "cleaned up" 853 so probably flowing somewhere a stock 241 would flow. i know the top end isnt the best by any means but here is another question for you guys, with 400 rwhp what "should" the 1/4 mile times be??? ive been told that 400 rwhp is low 12's which is what the car dynoed with the six speed in it. i dont know guys im thinking the cars tune is gone cause of the hard start issue and because when your driving behind the car going down the road all you can smell is raw fuel.

98Z28CobraKiller

iTrader: (17)

The MPH is what tells the story here. Definetly something wrong. As in more than the converter or heads or intake. If the tune were that far off, I think it would run like ****.

Nitroused383

iTrader: (10)

I am in Spokane and the new clocks are a lot different than last year, some people are reporting .5-.7 tenths slower and 5 mph. I have hptuners and if you want I could look at whats going on. Also remember our track is at 2000' elevation, but yes something is way off.

If you want me to check out the car let me know and we can dink around with it after I get off work. I tuned my head / cam 346 myself and put down almost 420rwhp at Shelley's. I'd like to check your car out (for fun) as its just a hobby of mine.