Well just returned from the track again and made another gain.
I pulled 3% fuel from upper VE and that netted me my new best .

Could not seem to pull a better time though but backed it up with a 11.33 and a 11.36. I wanted to play with converter force lock MPH but did not really have time, especially trying to tune 2 cars.
I got the 82 back on the road and track as well.

There also happened to be a Mustang Dyno at the track that I was able to get on, Results seem a little scewed to me....
349 HP @ 6000 339 TQ @ 4750
Right after that my brother in law Dynoed his ls1 that Traps 112MPH and he made 343 HP @ 5700 358 TQ ...hmmmmm

 

Must have been at Keystone today. Wish I would have been able to get back together with my upgrades and be there also.

Next week.

Anyways good job on the new best.

Corky got his new best today also. 10.94@124.

DA was around 900-1000 today so the dyno should not have been off because of that....what is the weight of your car?

Typically the only thing I have seen that really effects dynos is the DA, obviously there could be many other items that could effect it, but usually the guys have them dialed in pretty good, or they get a bad rep for their results and no one will use their machines.

But all things equal, those results probably are not all that far off. In 3000 DA weather mine made 399RWHP and 400+ torque. Based on your track ETs your about .2sec off, so your probably about ~35-40 Hp difference. I say that much because where we are at, it takes alot more than 10hp to gain a .1sec.

Well perhaps we will see one another there next weekend. The weather will surely be getting better as fall continues to come. Last weekend my car was running GREAT. Sure wish I would have let it go for this weekend, but then the following weekend might be better and I would miss that one. Its a no-win situation!

l8r

 

Is that A typo by chance - I seen him goo 11.00 , Thats a huge jump.
Either way he is running great.

3480 lbs


Something was off.. Like I said, My brother in law traps 10mph less than me in a 6 speed - his car only weighs 150 lbs more.
Where is the other 80 HP at?



Being that my car weighs more and you only trapped 1 mph more

I would say HP should be pretty close - less than 35-40
If you got 399 in 3000 DA, Than my results were deffinetly wrong!!!
MPH Reflects HP - Not ET.
My car weighs 3480 with me in it.

 

87_TA,

OOOPs. that was 10.94@124...sorry. My little one wanted to play and I was trying to hurry.

My car as it sits now with 3" full exhaust added and roll bar+ safety good, weights 3450...so ours cars are nearly dead on as far as weight goes. The vettes get a little overestimated lightness from people that do not know what they really weight.

As I said to gain .1 sec when your at low 11s takes more than 10 hp. As far as MPH indicating HP, I like to believe that also, but not getting into great detail. I have thrown that idea out the window earlier in the season for various reasons. But like i said, that is another story.

Didn't you go to the dyno ealier in the year also? Thought you did.

Who knows...Corky and I talk nearly every night, driving ourselves nuts with trying to make sense of it all. Like with my car. I add 100+ pound to it, in worse weather than earlier in the year, virtually the same setup, and run quicker than I did in better weather, open exhaust and less weight. Go from 600' DAs running my best et, understandable. To 2000' DAs and run .08 slower, but when comparing the slips 60' to 1/8 to 1/4 times. They are almost identical. With nearly the same aor better 60' times. It will drive you NUTS.

Anyways you doing well with your setup, and going out as often as possible to try to gain that extra .01 sec. So that says ALOT.

 

Thanks Ski!

When you ran your car open did you lock BLMS?

When I ran mine open the first time it went really rich because the 02 is too close to the end of the header and pegged BLM's to 160 - So the ECM was compesated.
Now I run open loop when headers are open.
I still get A ses light for ( oxy sen lean )
Wonder how I fix that?

 

Difference is automatic vs manual. Torque converter can skew the results of a chassis dyno.

In fact several friends were discussing this on another list.

"Earlier this past summer, my friend paid big bux and
bought a carb-to-pan 502/502 Chebbie big block for
his 68 Camaro convertible. It quickly made for drivable
and fun car. Very plug 'n play. He put some m/t sticky tires on it and turned 12.20's at 120ish. He dynoed it yesterday, and found his max RWHP was 374. The dyno operator was not surprized at all, and said the 700r4 is a real parasite. He said a TH400 would bump his RWHP numbers by 30hp over the 700R4<?>. That seemed a little extreme to me, but I don't own a dyno. The dyno guy went down
a few jet sizes and got 406hp. "

BW

 

The only time I saw a problem on my WB/scanner was at idle, once I hit the gas, the WB and the BLMs came into range.

I mean its not the best thing in the world to do, but for the track, just get some 02 sims. Or locking the BLMS for the track would do the same.

Now with the exhaust everything is back to norm. 127-131 BLMS.

 

Saturn,

I spoke with Dana (pro-built) for a while on the subject of trannies and efficiencies. He told me with a 400 it would gobble up even more HP than the 700s. I'm sure he is talking his tranny vs a 400. He told me he could tweak mine even further if I wanted, but the items he mentioned would be only for a strip car. He said he could probably get me a .1-.2 sec more out of it.

Guess it all depends on how each of the trannies are built. I always thought also that the worst to best were 700s=>400=>350s but after talking with him guess its like everything, it all depends. The one thing that is still unchanged is the dependability. 400s take some serious ABUSE without giving it up. Easy to rebuild etc.

 

That is accurate. A built 400 is very strong, but with that strength comes additional parasitic power loss. At least thats the way I have always heard it.

It would however be nice to see some dyno graphs head to head.