Quote:
Originally Posted by D-CEL
... “easily produce 700 to 800 HP out of a 302 cubic inch displacement. With the Twin Screw blower you do not need big displacement or RPM.”
I disagree: 700-800 hp from 302ci requires A LOT of everything! Aftermarket block, Big flowing heads, High dollar rotating assembly, a big blower, race fuel and RPM. Yes it can and has been done, but the motor will be a peaky, high maintenance and temperamental (sounds like my X wife) Not the making of a good street motor.
And that is the beauty of the 385 series BBF. We can make those numbers naturally aspirated on with a stock block, an $800 Chinese forged crank, good alum heads and possibly on pump gas!
Jason
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Apologies Jason been away for a while so I did not respond promptly.
You are missing the mark here by a country mile though. The twin screw compressors have an extraordinary track record in the power production department — usually with just a larger set of injectors, MAF upgrade and fuel pump upgrade.
A personal acquaintance of mine, Harold Horton, won the Terminator / GT500 shootout last year. He used an 11 year old showroom stock engine that had never been apart or out of the car! He has raced it almost exclusively for the last eight or so years and not surprisingly won multiple events with it. His upgrades were what I spoke to in the beginning of this post. His final round performance was in the low 8.3x at middle 160's mph-wise at the Shootout.
His car weighs about 3300/3400 lbs and consistently runs 8.3x times in the low to middle 160 mph bracket. The car idles at 800 rpm and when driven on the street gets a little over 20 mpg. Now here is the best part, that is unfortunately really tough. It turns out it is a really big engine at ultra high rpm — it displaces 281 cubic inches and he shifts at between 6300 and 6500 rpm.
The car uses the original OEM ECU. The trick (if there is a trick) is the blower, the fuel supple, the injectors and knowing how to tune your engine and drive your car.
Here is a video of the car in action click here ⬇︎
Stock Cobra
It looks like he might break into the sevens this year with a freshened engine and some hot rod cams. He has already been a whisker short of 170 mph.
Not bad for an 11 year old, off the show room floor, untouched stock everything in the engine compartment except for blower injectors and fuel supply, 281 cubic inch midget motor.
Positive displacement screw blowers and people who know how to use and tune them make a
BIG difference.
Ed
p.s. Imagine what an engine like that, in a car like ours, that weighed 1000 lbs less might be like
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