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Search: Posts Made By: speedjohnson
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Forum: C4 Tech/Performance
12-11-2006, 04:57 PM
Replies: 19
Views: 1,883
Posted By speedjohnson

The rear shock mounts are plenty sturdy. Do not...

The rear shock mounts are plenty sturdy. Do not hesitate to go with a coilover package.
Forum: Engine Mods
12-11-2006, 03:25 PM
Replies: 23
Views: 1,219
Posted By speedjohnson

What kind of Brodix? What's your application?...

What kind of Brodix? What's your application? Street or race?

When I first did my 400, I tried using Brodix -10's, kept the runners kinda small and used a more conservative roller cam. The...
Forum: Autocrossing & Roadracing
12-11-2006, 11:50 AM
Replies: 8
Views: 526
Posted By speedjohnson

The clutch is about 1k, the bell housing and...

The clutch is about 1k, the bell housing and starter is about 800, you can buy used/ well maintained jerico's from NASCAR teams for about 2k.

You'll need to use plates instead of motor mounts,...
Forum: C4 Tech/Performance
12-11-2006, 11:36 AM
Replies: 68
Views: 11,263
Posted By speedjohnson

I found that there was plenty of hood room for...

I found that there was plenty of hood room for the swap. I was able to fit a rather tall single plane manifold (Victor Jr.), a 750 Holley and a 14" round air cleaner assy (OEM big block C3) without...
Forum: C4 Tech/Performance
12-08-2006, 12:31 PM
Replies: 68
Views: 11,263
Posted By speedjohnson

A carb definately still holds it's place for the...

A carb definately still holds it's place for the American hot rod.

One opportunity that a carb'ed motor affords is a wider range of performance tuning options, particularly in the higher rpm and...
Forum: Autocrossing & Roadracing
12-06-2006, 12:57 PM
Replies: 8
Views: 526
Posted By speedjohnson

Is this a dedicated track car? If so, I used...

Is this a dedicated track car?

If so, I used a Jerico. This weighs in at less than 70# (rather than the 150+ of the ZF), the gears are straight cut and stackable for different ratio's.

You're...
Forum: C4 Tech/Performance
12-04-2006, 07:18 PM
Replies: 68
Views: 11,263
Posted By speedjohnson

Too lazy to read 4 pages, perhaps some of this...

Too lazy to read 4 pages, perhaps some of this has already been covered, But:

It's totally do-able and a great way to bring life to a car that you'd otherwise tow to a wrecking yard... like, in my...
Forum: Autocrossing & Roadracing
12-04-2006, 06:58 PM
Replies: 3
Views: 690
Posted By speedjohnson

You can really go to town with them. The hardest...

You can really go to town with them. The hardest to do is to remove the doorbar (only if you have a roll cage) and the metal reinforcement strip at the top... they are glued and laminated in......
Forum: Autocrossing & Roadracing
11-13-2006, 03:30 PM
Replies: 42
Views: 9,821
Posted By speedjohnson

If you mean a wing, then you'll have to get it...

If you mean a wing, then you'll have to get it into the clean air well above the rear deck. It'll really slow you down at high speeds, but will increase your grip in medium + fast speed corners as...
Forum: Autocrossing & Roadracing
11-06-2006, 01:00 PM
Replies: 17
Views: 610
Posted By speedjohnson

I pulled my C5 around OK in a 20' enclosed...

I pulled my C5 around OK in a 20' enclosed trailer... but you'll have to practice up on your calestenics as the only way out is through the window.

I've seen one that had the floor built up and an...
Forum: Autocrossing & Roadracing
11-03-2006, 04:54 PM
Replies: 42
Views: 9,821
Posted By speedjohnson

I had high speed stability problems with mine...

I had high speed stability problems with mine that were solved with the addition of a rear spoiler and rear diffuser.

The rear spoiler is merely a six inch high piece of 1/8" clear lexan set at 45...
Forum: Autocrossing & Roadracing
10-20-2006, 01:21 PM
Replies: 41
Views: 3,147
Posted By speedjohnson

I gained some tire life with my performance...

I gained some tire life with my performance alignement by swapping the tires on the rims (inside edge moved to outside edge) after about 5K miles. The cost was 30 or 40$ per tire to dismount/mount...
Forum: Autocrossing & Roadracing
10-18-2006, 05:27 PM
Replies: 8
Views: 646
Posted By speedjohnson

What they're all trying to say is that the rear...

What they're all trying to say is that the rear tires don't stay straight when the car is loaded.

If your rear tires aren't traveling in a straight line, but rather, they are turning "out", then...
Forum: C4 Tech/Performance
10-06-2006, 04:37 PM
Replies: 7
Views: 760
Posted By speedjohnson

That is a sweet kit. I'd like to get a closer...

That is a sweet kit. I'd like to get a closer look at part #3 in their blow-a-part shetch. This is the part that I was unsuccessful in fabricating in a reliable fashion.

Thx for the point bogus.
Forum: Autocrossing & Roadracing
10-06-2006, 04:29 PM
Replies: 24
Views: 3,999
Posted By speedjohnson

If the rear it toes-out when the rear lifts, then...

If the rear it toes-out when the rear lifts, then this is exactly the opposite of what the C4 does, but the fix is the same. First measure your rear bump steer to confirm that your suspension is...
Forum: C4 Tech/Performance
10-04-2006, 07:43 PM
Replies: 7
Views: 760
Posted By speedjohnson

The problem that I had with my C4 trans swap was...

The problem that I had with my C4 trans swap was with the wishbone attachment.

The tailsection of a "normal" trans is not beefed up enough to support a welded or bolted on flange (to simulate the...
Forum: Autocrossing & Roadracing
09-22-2006, 11:45 AM
Replies: 41
Views: 3,993
Posted By speedjohnson

It's the fatal combination of heat and those...

It's the fatal combination of heat and those grippy wide tires that trash the bearings so fast.

Other street cars have run into similar problems when they are converted to racing... spec miata...
Forum: C4 Tech/Performance
09-20-2006, 11:33 AM
Replies: 21
Views: 2,331
Posted By speedjohnson

Yeah, because that flammable fiber/resin floorpan...

Yeah, because that flammable fiber/resin floorpan gives so much protection...

It's actually pretty easy to fab up an aluminum bulkhead. This, plus an adequate cell (such as one from Fuelsafe)...
Forum: Autocrossing & Roadracing
09-18-2006, 06:01 PM
Replies: 41
Views: 3,993
Posted By speedjohnson

You've had some very good suggestions by the...

You've had some very good suggestions by the other Forum members. My set-up has been changed a few times and here's what I've found:

If you're running stock leaf springs, then look for the rear...
Forum: C4 Tech/Performance
09-18-2006, 02:00 PM
Replies: 4
Views: 627
Posted By speedjohnson

The problem is rarely a timing chain failure, but...

The problem is rarely a timing chain failure, but rather as the chain stretches, the loose tolerances allow the camshaft to retard and you lose torque.

That said, replacement is a real PITA......
Forum: C4 Tech/Performance
09-18-2006, 01:55 PM
Replies: 13
Views: 1,133
Posted By speedjohnson

Slo: Thx. The tape measure did come in handy as...

Slo: Thx. The tape measure did come in handy as a backing for the epoxy, and was easy to remove after the epoxy set up.

also, the key to working with this stuff was the wet fingertips... thanks...
Forum: Autocrossing & Roadracing
09-18-2006, 01:47 PM
Replies: 18
Views: 804
Posted By speedjohnson

I'm supposing that you're running an HPDE and not...

I'm supposing that you're running an HPDE and not an autocross.

If you run the car hard, then you'll likely use up all the pad in a day anyway.

It's important that you change to a pad that can...
Forum: Autocrossing & Roadracing
09-18-2006, 01:26 PM
Replies: 2
Views: 418
Posted By speedjohnson

Stop holding onto the shifter in the corners......

Stop holding onto the shifter in the corners... both hands on the wheel.
Forum: C4 Tech/Performance
09-13-2006, 02:29 PM
Replies: 13
Views: 1,133
Posted By speedjohnson

Will: thx much for the detailed... and sometimes...

Will: thx much for the detailed... and sometimes x-rated instructions. sj.
Forum: C4 Tech/Performance
09-11-2006, 04:56 PM
Replies: 21
Views: 2,331
Posted By speedjohnson

I tried a couple of different set-ups. The...

I tried a couple of different set-ups. The problem with the c-4 tank is that it's shaped like a hotdog laying high across the rear deck. Not only is the weight up high, the gas rides up the rounded...
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