"Hey" my daily driven race car!

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duke
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Re: "Hey" my daily driven race car!

Postby duke » 10 Nov 2017 11:57

You guys have almost have me convinced to go to 4.44's for next year...

My only hesitation is that my max speed in 2nd will be reduced by 10mph (from 65 currently to 55). I'm afraid that this might actually slow me down in some events, as I will have to be shifting to 3rd more often (with the 3.90 I have in my car right now, I can do most courses in 2nd).

So what do you guys think?

(Sorry for the hijack Jeff, but at least it is relevant to going faster!)
Duke Schimmer

'72 2-Door 510
"Simplify and add lightness."

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bertvorgon
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Re: "Hey" my daily driven race car!

Postby bertvorgon » 10 Nov 2017 12:23

Jeff....Jeff WHO....?

That is the maybe issue, is where do most of your courses run you? My transmission and of course my gears let me handle low 3rd gear not too badly.

So, your observation is right on and the choice has to be based on what most of your course's run you at. If it was me, I would be picking the ability to use ALL of your 2nd gear, as you well know, shifting both wastes time and can unsettle the car.

For most and any of us, even taking gears into account, the split from 2nd to 3rd has never been good at a solo event. Only if the course lets you use a good chunk of third can it be ok, and of course how much "bottom" end you have in the RPM range. My car sucks if I am down in the 3,000 range.
"Racing makes heroin addiction look like a vague wish for something salty" - Peter Egan

Keith Law
1973 2Door Slalom/hill climb/road race / canyon carver /Giant Killer 510
1968 Vintage 3HP Mini Bike
1971 Vintage 13' BOLER trailer

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icehouse
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Re: "Hey" my daily driven race car!

Postby icehouse » 10 Nov 2017 13:11

HAHA You guys can use my thread for racecar talk anytime!

Duke you should do it! I had 3.7's before and its so much better on the low speed corners I'm almost 2 seconds faster then a guy that used to be about the same speed as me and I feel I can improve on that. I am worried about dry days on our high speed layouts for changing gears to. Although it might be kinda fun. Not shifting at all is boring.
"People don't like it when shit doesn't match their rule of thumb." Sam

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funwithmonkeys
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Re: "Hey" my daily driven race car!

Postby funwithmonkeys » 10 Nov 2017 13:17

You guys just need a higher red line. Being able to go to 8000 will fix that shifting issue.
If no one from the future comes back to stop you from doing it then how bad of a decision can it really be?

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bertvorgon
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Re: "Hey" my daily driven race car!

Postby bertvorgon » 10 Nov 2017 13:51

Yes, RPM potential is the key, I can buzz mine to 8,000 also, so that makes up for some gear issues, Heh, Heh...

This also is where a good race clutch setup comes in handy, it's fast and precise.
"Racing makes heroin addiction look like a vague wish for something salty" - Peter Egan

Keith Law
1973 2Door Slalom/hill climb/road race / canyon carver /Giant Killer 510
1968 Vintage 3HP Mini Bike
1971 Vintage 13' BOLER trailer

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duke
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Re: "Hey" my daily driven race car!

Postby duke » 10 Nov 2017 14:21

funwithmonkeys wrote:You guys just need a higher red line. Being able to go to 8000 will fix that shifting issue.


This is true...but that is expensive! I don't spin my KA any faster than 7000 rpm. I have heard that there is a harmonic that sets in at about 7250 rpm that will absolutely destroy them.
Duke Schimmer



'72 2-Door 510

"Simplify and add lightness."

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icehouse
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Re: "Hey" my daily driven race car!

Postby icehouse » 10 Nov 2017 15:56

Ditch the KA for a SR20VE Duke!! A buddy of mine road raced a sentra. He said the VE's will spin 9k all day stock! That and the P11 stock ports flowed better then the S13 head he had professionally ported. You will loose 50lbs getting rid of the cast iron KA block. That's what I'm going to do next. Kinda thinking I should turbo it though. Just to make it even more of a blast to drive.
"People don't like it when shit doesn't match their rule of thumb." Sam

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bertvorgon
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Re: "Hey" my daily driven race car!

Postby bertvorgon » 10 Nov 2017 16:03

Yes, the KA's in race mode do suffer some major harmonics, you should see what Andy at Specialty does to keep the starter motors from breaking off, amongst other things.
"Racing makes heroin addiction look like a vague wish for something salty" - Peter Egan

Keith Law
1973 2Door Slalom/hill climb/road race / canyon carver /Giant Killer 510
1968 Vintage 3HP Mini Bike
1971 Vintage 13' BOLER trailer

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funwithmonkeys
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Re: "Hey" my daily driven race car!

Postby funwithmonkeys » 10 Nov 2017 16:07

bertvorgon wrote:Yes, the KA's in race mode do suffer some major harmonics, you should see what Andy at Specialty does to keep the starter motors from breaking off, amongst other things.

He has a nice one sitting on the shelf. 300hp N/A.
If no one from the future comes back to stop you from doing it then how bad of a decision can it really be?

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bertvorgon
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Re: "Hey" my daily driven race car!

Postby bertvorgon » 10 Nov 2017 16:13

Yah, that's that race truck motor
"Racing makes heroin addiction look like a vague wish for something salty" - Peter Egan

Keith Law
1973 2Door Slalom/hill climb/road race / canyon carver /Giant Killer 510
1968 Vintage 3HP Mini Bike
1971 Vintage 13' BOLER trailer


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