High HP 914? |
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High HP 914? |
d k |
May 3 2011, 10:59 AM
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#1
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Newbie Group: Members Posts: 7 Joined: 2-May 11 From: Miami Member No.: 13,014 Region Association: None |
Hello people.
I'm a noob here, but been around cars for awhile. Recently acquired a 75 914 that is very clean and going to do the Subaru conversion. Car will be used mostly for track events and some odd miles on the street. The question that I had, is how does this car respond to high horsepower? In stock form, the EJ257 will put out 300 at the crank and I'm wondering if it makes sense to tweak it a little more.... I've seen a few conversions done here and read through a ton of threads. Some very helpful info here, but I haven't read anybody's feedback on what the chassis will do if throw 500hp at it? Besides all the supporting mods necessary to handle the power, what will the driving dynamics be?? Maybe it's not worth to do anything except just the engine swap, but since it's going to get a full cage, big brakes and aero, maybe go big (IMG:style_emoticons/default/driving.gif) David |
Mike Bellis |
May 5 2011, 08:36 PM
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#2
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Resident Electrician Group: Members Posts: 8,345 Joined: 22-June 09 From: Midlothian TX Member No.: 10,496 Region Association: None |
My car was a V8
SCCA race car with a full cage. Full chassis stiffening kit, with extra stiffening. 930 Turbo suspension and brakes. 500hp axles, Tranny re-geared for higher rpm. Bilstein shocks all around. The car is very stiff. Very little flex. I was able to push the car to the limit. There is a fine line between the cahassis limit and over power. My car was purpose built to go fast on the track. I'm lucky it's still street legal. I decided to go far away from the norm on my build (see link in my sig). The problem with the V8 is having too much low end torque. The V8 can over power the chassis and loose traction. This can be dangerous if the car is not predictable. In my case the car is very predictable. The car settles into the corners the same way every time. My new engine is a Turbo Rotary. 350hp @ 7000 rpm, 250 ft lbs at 4500 rpm (est.) the car is now 400 pounds lighter too. I expect the need to dial in the suspension again when I get it on the road. With my high gearing and an 8000 rpm red line, I should be able to hit 200 mph. The aerodynamics will prevent that speed though. I did notice on my last inspection that I broke the front sway bar mount from the inner fender. The PO did a shitty job with the under tank bracket and it ripped the metal. Now I have something new to fix. If money were no object, I would have gone with a 3.6 Porsche motor. But I have a history with the cute little Wankel. The are super light and makes tons of HP from a 1.3 liter engine. Any engine swap you decide will be awesome. Even a hoped up 4 cyl can be lots of fun! Just don't do this engine swap or you will get laughed at! |
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