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Old 05-13-2014, 02:54 AM   #241
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Wonder if any1 ever did convert an svtf to a 5spd. Maybe this explains ur slow 1/4mi ?? Get ur box sorted and install diff with the box out. Good luck. R
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Old 05-13-2014, 11:04 AM   #242
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Quote:
Originally Posted by UltegraSTI View Post
Wonder if any1 ever did convert an svtf to a 5spd. Maybe this explains ur slow 1/4mi ?? Get ur box sorted and install diff with the box out. Good luck. R



i would think it wouldn't really be that hard other than i guee the tooth count for the crank senor would be different. so you would have to have a mtx clutch and flywheel but with a svt trigger wheel on it. other than that i would think it would bolt in...
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Old 05-15-2014, 04:47 PM   #243
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So what became of the clutch situation with Spec?
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Old 05-17-2014, 04:03 PM   #244
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ive always disliked spec clutches
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Old 05-18-2014, 03:22 PM   #245
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Quote:
Originally Posted by UltegraSTI View Post
Wonder if any1 ever did convert an svtf to a 5spd. Maybe this explains ur slow 1/4mi ?? Get ur box sorted and install diff with the box out. Good luck. R

Me and him are running about the same 1/4 times and trap speeds. So I'd say it's not a trans issue. More one the grip side of the equation. I can't get a good 60' or 330' to save my life. 1st is just wheel spin so I have to peddle or limit it. And no matter what I do, spin or limit, my time comes out pretty close to the same.


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i would think it wouldn't really be that hard other than i guee the tooth count for the crank senor would be different. so you would have to have a mtx clutch and flywheel but with a svt trigger wheel on it. other than that i would think it would bolt in...
Tooth count is the same. Actually the CPS is the same.
Nearest I can tell, there's maybe some wiring differences, the axles and the shift cables. Other than that it should be a straight forward swap.
Maybe the Pilot Bearing is different, but I doubt it.
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Old 05-18-2014, 04:44 PM   #246
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I know some use SVT blocks in their ZX3 and is all the same but for the oil squirters and of course rods and pistons.
What you guys need is LSD, slicks and stiffer suspension.
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Old 05-18-2014, 04:52 PM   #247
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Check, need, and check.

Still the same thing. SO it's tires more than anything I'd say.
You're launch is a different case than most turbo guys, but you have to keep in mind that the throttle response of my car is better than a turbo car. I don't have any wait time. It's spin right now at any RPM vs spin once boost hits, so keep boost low.
I'm sure you've driven cars with decent N/A power and can relate.


Problem with more grip is there is also greater rolling resistance. My 60' might come down a lot, but my time and MPH might not follow if the tires are sucking lots of power on the big end. Right now the MPH is my only saving grace.
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Old 05-18-2014, 06:18 PM   #248
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Just something to consider. Aluminum flywheels are generally a very bad choice for a drag race car. With a steel flywheel, you have much better retained momentum, which means you can launch with lower rpms, and not lose as much traction. This is very important on low displacement engines.

Weight savings are important everywhere inside the engine as it will reduce drag, and reduce momentum of moving parts which makes a world of difference on part wear. BUT this is the exact opposite effect that you want on the flywheel. Many drag race cars often use a heavier than stock flywheel to keep more momentum on the roll out.

I've seen some if the top posted times on here and the other board, and to be honest, for the hp these cars are putting down, the times are pretty slow, and I have noticed that a common factor between them is that they are running aluminum flywheels.

I am not alone on this opinion, my dad builds 400+ hp turbo dodges, and one guy wanted to convert his road race car to drag race. After switching to a stock heavy flywheel, he gained .4 seconds on the 60' and almost a second on the 1/4. It is the same general concept of why you don't shift at your peak power band, you spin past it to retain more momentum going into the next gear.

Hope I could help.
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Old 05-18-2014, 06:43 PM   #249
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Quote:
Originally Posted by iminhell View Post
Check, need, and check.

Still the same thing. SO it's tires more than anything I'd say.
You're launch is a different case than most turbo guys, but you have to keep in mind that the throttle response of my car is better than a turbo car. I don't have any wait time. It's spin right now at any RPM vs spin once boost hits, so keep boost low.
I'm sure you've driven cars with decent N/A power and can relate.


Problem with more grip is there is also greater rolling resistance. My 60' might come down a lot, but my time and MPH might not follow if the tires are sucking lots of power on the big end. Right now the MPH is my only saving grace.

Just because rolling resistance leeches power, don't think that is going to take away mph. In fact, with that much power, you are also probably losing traction throughout the gears, even if you don't notice it. The extra traction will pull you to a higher mph, much quicker and more efficiently. The max width of the slicks on our cars don't really allow for all that much rolling resistance anyways. That is more of a problem for the rwd guys that tub their car and put WAY too much tire for their engine. My dad used to be a street race legend around SoCal, and his biggest advantage was surprise. He knew the engineering behind weight distribution and traction, so he only ran an 8 1/2 wide slick on his 67 nova, yet would run mid 9s. That is how he got three five page articles in hot rod magazine, and two with his vega. Now he drives an 11.5 second 85 Dodge Omni that smogs (IN CALIFORNIA!!!!) and has full interior, a/c, cruise control, and stuff. That car made a five page article in "Sport Compact Car Magazine" where they named him King of Cheap Speed. Just look up "ugly old omni" on YouTube. It's mostly 1/8th mile runs though.

Sorry about the two rants, but I just want you to know that what I'm saying comes from very proven knowledge, and I'm tired of getting shot down on fwd car forums by people that are clueless or just book smart. I wish I could afford to build a car like yours, but for now, I'll just share my passed down knowledge.
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Old 05-18-2014, 10:22 PM   #250
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No offense taken in the least, and I never disregard experience based knowledge.

I do have a stock FW I can swap back to to test, although the work isn't something I look forward too. If the engine goes kaput, I surely will though.
But I do think you might be onto something. Conservation of Momentum should play a large roll with our cars.
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