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06-21-17, 04:04 PM
Replies: 7
Views: 1,973
Posted By speedturn

Jet sizes depend on Venturi diameter!! What...

Jet sizes depend on Venturi diameter!!

What size venturies do you have in your 48 IDA Weber carb?
Forum: Race Car Tech
02-09-17, 09:49 PM
Replies: 6
Views: 1,378
Posted By speedturn

Rodger Mandeville's shop used to build those...

Rodger Mandeville's shop used to build those style Trans for my vintage racing competitors, and those were good boxes. ISC can build a box like that too. I tried building one myself several years...
Forum: Race Car Tech
01-25-17, 10:26 AM
Replies: 11
Views: 2,317
Posted By speedturn

Keep the gap small on the R6725 plugs - .028" is...

Keep the gap small on the R6725 plugs - .028" is the maximum you want for a high rpm engine. You can run them as tight as .025".
Forum: Race Car Tech
01-20-17, 02:30 PM
Replies: 11
Views: 2,317
Posted By speedturn

I have been using this little $10 Harbor Freight...

I have been using this little $10 Harbor Freight spark plug cleaner for 20 years now, and it works great. Don't push the plug all the way in, or else all the threads will get blasted. Like Kenku...
Forum: Race Car Tech
12-13-16, 02:45 PM
Replies: 8
Views: 1,214
Posted By speedturn

I love the sound of a rotary coupled to a close...

I love the sound of a rotary coupled to a close ratio road racing transmission
Forum: Race Car Tech
12-13-16, 02:38 PM
Replies: 104
Views: 23,896
Posted By speedturn

Wow, that is a major undertaking. I have...

Wow, that is a major undertaking.

I have seen John Finger's car with the MX-6 bodywork at the Mitty, maybe 8 or so years ago. He was paddocked right next to me. He had it for sale, and was...
Forum: Race Car Tech
09-02-16, 10:24 AM
Replies: 27
Views: 5,416
Posted By speedturn

There is a lot of good advice in this thread

There is a lot of good advice in this thread
Forum: Race Car Tech
09-02-16, 10:19 AM
Replies: 5
Views: 1,631
Posted By speedturn

Put a jack stand under both spindles, so they...

Put a jack stand under both spindles, so they stay at constant height. Either mount a laser to the spindle, or mount a mirror to the spindle and put the laser shining on the mirror. Make a mark on...
Forum: Race Car Tech
09-02-16, 10:14 AM
Replies: 9
Views: 1,115
Posted By speedturn

That was a tight little track, with out much...

That was a tight little track, with out much passing opportunities. Yes, you were clearly past him when he hit you, definitely his fault.

What was the name of that circuit?
Forum: Race Car Tech
09-02-16, 10:09 AM
Replies: 22
Views: 3,056
Posted By speedturn

2016 Barber Race

Chuck, sorry I didn't make it down to Barber last weekend; I ended up spending last weekend in the hospital with pneumonia. I hated missing that race; I had my car all ready to go. I hope my lungs...
Forum: Race Car Tech
08-18-16, 11:46 AM
Replies: 26
Views: 3,851
Posted By speedturn

As 23racer said, it is very important to duct...

As 23racer said, it is very important to duct cool air to the center of the rotor. Vented rotors work as centrifugal air pumps, as they turn the vanes pump air cooling air from the center through...
Forum: Race Car Tech
08-14-16, 09:45 PM
Replies: 27
Views: 5,416
Posted By speedturn

The MSF Australian spindles are cool, but wow...

The MSF Australian spindles are cool, but wow $1450 a pair. The GSL-SE ones seem good enough to me. They are usually available at a junkyard for $100 to $200 for a pair.
Forum: Race Car Tech
08-11-16, 10:04 AM
Replies: 4
Views: 1,848
Posted By speedturn

His asking price is $2000 for one ring gear and...

His asking price is $2000 for one ring gear and one pinion gear. These are no longer available any where else.
Forum: Race Car Tech
08-11-16, 10:02 AM
Replies: 22
Views: 3,056
Posted By speedturn

Are you going to Barber 20 August 2016? I will...

Are you going to Barber 20 August 2016? I will have my 1st gen there running GT3 in the Time Trial.
Forum: Race Car Tech
08-11-16, 09:55 AM
Replies: 27
Views: 5,416
Posted By speedturn

GSL-SE brake rotors are readily available. If...

GSL-SE brake rotors are readily available. If you buy Chinese rotors, check axial and radial runout with a dial indicator. I bought one set of Chinese rotors through Rockauto.com, and they did not...
Forum: Race Car Tech
08-06-16, 04:40 PM
Replies: 27
Views: 5,416
Posted By speedturn

You can heavily modify the FB front end

Get the GSL-SE front struts, rotors and calipers.

I run a heavily modified 1st Gen (stock tail lights, everything else has been massaged.) I road race it against 3.0 liter Porsche 911 RSR IMSA GT...
Forum: Race Car Tech
07-13-16, 07:50 AM
Replies: 10
Views: 1,576
Posted By speedturn

Borla now makes a rotary specific muffler. It...

Borla now makes a rotary specific muffler. It works very well on my 1st gen 13B peripheral port IMSA GTU vintage road racer. It is very unique - it has 4 tubes in the straight thru core. I can't...
06-18-16, 09:59 PM
Replies: 1
Views: 1,493
Posted By speedturn

Don't guess. Wait until you get your A/F meter...

Don't guess. Wait until you get your A/F meter working. Once you have your meter working, then pay close attention to your foot (throttle open amount) and the rpms at which you get your A/F...
Forum: Race Car Tech
05-21-16, 09:33 PM
Replies: 29
Views: 5,713
Posted By speedturn

That looks nice. A diagonal in the main hoop,...

That looks nice. A diagonal in the main hoop, plus a diagonal in the rear braces = nice and stiff

Good job.
Forum: Race Car Tech
04-14-16, 11:01 AM
Replies: 10
Views: 1,227
Posted By speedturn

For vehicles with high weight and low power, I...

For vehicles with high weight and low power, I use a stretch of highway with a long steep mountain climb. I make a baseline run and note peak mph. Then I make my changes, and run it again and note...
Forum: Race Car Tech
04-07-16, 09:13 PM
Replies: 29
Views: 5,713
Posted By speedturn

The SCCA Time Trials rule book does not prohibit...

The SCCA Time Trials rule book does not prohibit you from attaching your rear down braces to the rear shock towers. Personally, I recommend tying together all the important points of the chassis,...
Forum: Race Car Tech
04-06-16, 01:46 PM
Replies: 29
Views: 5,713
Posted By speedturn

A 4 point roll bar is legal for SCCA Time Trial...

A 4 point roll bar is legal for SCCA Time Trial events, but it is not legal for SCCA road racing. A Full cage is required for SCCA road racing.

The bar must also have a diagonal cross brace.
...
Forum: Race Car Tech
04-06-16, 01:20 PM
Replies: 22
Views: 2,937
Posted By speedturn

"I am also going to take this time to delete the...

"I am also going to take this time to delete the thermostat/ plug bypass. Any recommendations for reduced diameter opening would be appreciated."

Are you talking about the water thermostat or the...
04-06-16, 01:15 PM
Replies: 6
Views: 4,501
Posted By speedturn

It is very important to put any kind of heat...

It is very important to put any kind of heat shield or insulation under the car between the exhaust and the floor, not on the inside of the cabin.

It also helps to put heat shields between the...
12-23-15, 02:06 PM
Replies: 28
Views: 5,800
Posted By speedturn

A cage adds a lot more weight than most people...

A cage adds a lot more weight than most people realize. A really stiff welded in cage with maximum chassis bracing adds a little more weight, but the handling improvements of the stiffer chassis and...
Showing results 1 to 25 of 478
 


 
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