Ok guys, I was just wondering what kind of power am I really putting down..My motor is a cam only 355..rather small cam 218/218 with .555/.555 on a 112 lsa..the EDL 2108 cam..Roller rockers, chromemoly pushrods, dual springs, etc. its a full bolt on car with a 3200 EDGE stall and a custom dyno tune...The most power we squeezed out of it on the dyno was 308/320 while we were tuning it...now the injectors were maxxing out at 98 duty cycle at about 5200 rpms so its needing more fuel...Im thinking bigger injectors would really help it but my question is how much power is the stall and A4 eating up..I would like to know about how much would 308/320 translate to..I hear all sorts of different drivetrain loss percentages and was wondering what my actual numbers were closer to

 

come on..I know someone can give me an idea of how much power the stall is eating up..Im putting it on the track next month after I get some drag radials and I know the numbers in the quarter mile will really tell me what Im doing..But i would like to know how much power my lil cam only combo is really putting out

 

a 3200 stall isnt that big... Its not eating up that much power

 

I dont know how much its eatin up. Every dyno is different, and it just a tuning tool. I have a TR224 cam and a ss4000 stall and I only dynoed 351rwhp but the car will run deep 12s if not 11s. (have beaten a car that ran 12.3 by about a car and a half)

Run it at the track before you get disappointed.

 

As I understand it, A4's eat about 15-18% of crank HP.

 

What kind of dyno was it?

Don't get hung up on your dyno numbers. A4's are seldom impressive on the rollers, but they really make up for it at the track.

For instance...my car made a whopping 338rwhp. But it ran an 11.95 with that

 

Yeah Im not getting hung up on the dyno numbers, I know the drill with A4 cars.. thats why I said I wanna see what its doing at the track..but I was just wondering what kind of numbers I was really putting down at the crank...and it was a dynojet

 

not to be a dick, but it was REALLY putting down 308/320. Just part of the deal man, the numbers dont mean anything. If you want to know for sure, go back and dyno it with the converter locked, otherwise it is pure speculation only. It could be anywhere from 308-350hp, who knows?
Gary

 

the converter was locked...third gear and we confirmed it on the laptop...we dynoed it from about 70mph to 140ish I think we got to about 142mph playing with the rpms and finding where to shift it at

 

well if the converter was locked, that negates most of it. It is simply an effect of the rotating mass at that point. you wont have any idea till you get it to that track.
Gary

 

I feel your pain on this one. Most people I know don't understand how a car with such a low dyno can get good times at the track. I put down 360whp on a mustang dyno unlocked through a 3600 stall. I'd say that's not too bad, but my friends just say "wow that's a lot lower than I was expecting."

I can't wait until the tracks open so I can find out what it runs.

 

yeah the numbers are way on the low side..but im sure it will be in the 12's with no prob..now i just need to work on my suspension to get it all to the ground cause traction is non existent

 

I wish I could get a decent answer for drivetrain loss with a stall like that too just out of curiosity. Dyno numbers mean jack to me just would be nice to get an idea of what the motor is putting out. You will definetly hit 12's if you can hook, throw some lca's and a torque arm on there. I was running 12.80's at 110mph w/ a 2.0 '60 on the stock stall spinning a little so Im sure you could get in the mid 12 range with suspension.

 

I well go out on a limb here and tell you that 300ish (SAE corrected dynojet) thru an "unlocked" stall (full weight car) will turn 12's pretty easy, if your combo of parts is good (gears, verter and cam). Hell, I've seen 320 unlocked in a stripped LS1 do 11.5s (if you want a 3100lb race weight car....) We had one LT1 guy with a hot cam, headers, CAI and SS4000 stall (to big for his combo if you ask me) do 12.8's at 290 rwhp. He was none to happy about his dyno numbers till he went to the track, after that he did not care anymore what the dyno said another guy with the exact same combo (except with a smaller 3200 verter) do a 12.8 also (same day). Ryan K (fueling and computer moderator) turned a 12.3 on his old LS1 combo with just full lenght headers, cat back (cat deleted) cai and Yank ST3500. Simple combo that would more than likely dyno for ****, but ran good times in a full weight car.

StealthfFormula....

Most don't like giving numbers on autos. They can very widely and when unlocked stalls are added to the mix the numbers get real crazy...Autos are set frictional loss (like a manual) but the also very output depending on converter % loss (when unlocked). When I converted my manual over to auto, I lost about 10 rwhp (converter locked). Converter unlocked, I lost 30 more (total of 40 over manual). I also lost 3-4 miles an hour in trap speed verifying the dyno numbers. Now, if I had a huge stall in their (mine was a small 3600) then my horse power would have dynoed lower with even more % loss on the dyno, but trapped the same due to more average horse power. One guy over at CZ28 had his big hp combo dynoed on engine dyno, then after adding Turbo 400 thru loose stall.....He lost 18% (dynojet SAE corrected). So, it's a number I use if your just guessing % on a unlocked stalled car. Numbers can very so widely when 4000 + stalls are added to the mix, that numbers them self become useless. You just need to know your stall manufacture and your combo. Or lock your converter (if you can) and treat like a manual for loss

 

^thanks that helps. I give up on dyno numbers completely, track times all the way!

 

yeah im the same way..im confident I will be good for mid 12's..I just need to get some suspension work..all I have is springs now....everything i did was centered around the heads and cam...I sent EDGE all my specs on the car..every last mod I have and they sent me the stall that they recommended...3200 with a SSR of 2.45...the cam is 218/218 and .555/.555 on a 112LSA...with all the supporting mods and full bolt ons..so the package runs great..I didnt overcam it like everyone else did...i decided to go with a smaller cam and build the package around the cam...had the car tuned during the break in so I am probably seeing a few more horses now...but the track next month will tell the tale...Im sure I will be more than happy..Traction is non existent to about 35-40ish on street tires..so some DR's are in order to get the most out of it...Thanks for the discussion guys