My Scion tC dyno !!

tCing_U · Tweet this Post! #1 (**permalink**) 07-31-2006, 01:35 PM

Ok, i finally had a chance to dyno my car. All the rest of the shops are damn busy for the upcoming car show here in Hawaii. Now heres my 1st, 2nd, and 3rd run. All had 20 minutes cooldown before each run. Pulls are all on 4th gear. Everything is stock, except for the custom 3'' downpipe-back exhaust with HKS HiPower (no cat, no resonator). This is done on a Dynojet.

^^1st run...WHP=218.6 /WTQ=224.1

^^2nd run...WHP=247/WTQ=235.7

3rd run...WHP=248.5/WTQ=232.4

^^Noticed something?? Yes. Does anyone know whats that drop all about around 4500ish RPM on all 3 runs and it just suddenly increased right before redline??? Do i need to tune my unichip?? The suppposed claim WHP is 244 and WTQ is 262...Im fine with the WHP, but maybe my 3'' full exhaust dropped the TQ that much, dont you think so?? Cuz it really does not feel like it used to be when it had stock pipe, pulls harder. Does anyone know of somebody with 2.5" full exhaust that did more WHP/WTQ??? Overall im happy with the results, and im not done yet with this, lol.

Lastly, let me know what you all think. opinions, comments, and questions??

yamaha16bw · Tweet this Post! #2 (**permalink**) 07-31-2006, 03:58 PM

Not sure about the TQ. I dont think so cause almost all turbo'd racers run open downpipes. Ive seen alot of mixed dyno for our kits. Some 240ish some 205ish and then some running kit and exhaust hitting close to 270. Doesnt seem right to me. I think I have more power then 240 just because of the car I have kept up with or beaten. I hoping to get mine dyno'd as soon as this heat wave passes.

Robert · Tweet this Post! #3 (**permalink**) 07-31-2006, 05:09 PM

On pretty much all out of box Turbonetics tunes you will notice a drop in your AFR after 4500 which will usually net you a small drop in power. The answer is simple. The engine is MOST stressed as it nears redline under boost. To make sure there is ZERO chance of detonation as the engine approachs that dangerous spot on the power curve Turbonetics pulls a LOT of timing in that range. Thats what you are seeing with your drop in power. Now yes this can be tuned out but unless its drastically hurting the power delivery I would let it go. Nothing wrong with being safe.

tCing_U · Tweet this Post! #4 (**permalink**) 07-31-2006, 07:11 PM

^^yeah, thats what the guys were saying at the shop...maybe the unichip is tuned to run safe, something about timing they were saying. cuz i told them its a stock engine with turbo. sweet, i guess im ok.

Yamaha...make sure to post your dyno if youre getting it and what mods, i wanna see the difference, aight.

yamaha16bw · Tweet this Post! #5 (**permalink**) 08-01-2006, 01:09 AM

Will do

Robert · Tweet this Post! #6 (**permalink**) 08-01-2006, 02:25 AM

Quote:

Originally Posted by tCing_U

^^yeah, thats what the guys were saying at the shop...maybe the unichip is tuned to run safe, something about timing they were saying. cuz i told them its a stock engine with turbo. sweet, i guess im ok.

Yamaha...make sure to post your dyno if youre getting it and what mods, i wanna see the difference, aight.

Yup thats about it.