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BubbleGuinea's Dyno Sheets are in!


Bubbleguinea

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and?

max power is....... 183.8 HP

max torque is....... 181.1 ft/lbs

IMG_0014.JPG

funny thing? ive got 54HP and 100ft/lbs at 3600RPM...and so on..the chart goes up and down, up and down from 2.5K to 4.3K RPM...finally, at 4.4K RPM, the charts start to look normal - actually i just looked at it again, from 2600-2750RM i have 25HP and 51ft/lbs! hehehe

this is just a run up to the dyno, no tuning at all so im not worried. i can get her past 200 once i work out the kinks with the SDS fuel system...i havent had time to tune it. The chart actually looks pretty funny, i wish i could take a pic of it :-(

engine?

.020 overbore

flatops

n42 head

mild cam

mild port job

custom EFI manifold

SDS fuel system

intake

exhaust 2.5 crushed bent

60mm TB

electric fan, no ac, no drag on engine

36degrees of advance

so im very impressed!!! i cant wait to set up cam timing, ign. timing, fuel settings, and valve lash to get this sucker over 200ft/lbs and HP!

and they said 2+2 werent fast????!?!?!

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Hmmm....

So, net HP of a stock L28 is about 142, right? With a new net of 184, that's a respectable net gain of 42HP--good job! I bet most of it came from upping compression from low 8s to around low 10s by changing the head/cylinder combo, but the rest will certainly help keep it tuned well. Were you using 93 octane gas?

BTW, there is always drag on the engine...flywheel, clutch, driveshaft, trans, halfshafts, etc. but it's good you've done what you can to minimize it.

Don't know what to make of spikes in the dyno chart--maybe scan it and post? Keep us informed!

Keep up the good work,

Steve

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I would say the same thing, you have made good gains, I would think with proper tuning you should be able to get a bit more out of your car.

I would also suggest getting rid of your 2 inch exhuast and going with mandrel bends. With the crush bent exhaust you are at 2 inches or less in the bends which is definetly plugging up your breathing.

Good job nonetheless.

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ill answer that question after im done tuning it...found out my cam timing is wayyyy of...im not running enough advance, and my a/f ratio looks just like the first part of the above graph :-)

this thing will break 200 to the wheels, then ill post another pic and get it to be put up on zcar.com and have people flip again :-)

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