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Search: Posts Made By: JoBy
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Forum: C4 Tech/Performance
04-09-2024, 03:40 PM
Replies: 5
Views: 206
Posted By JoBy

Perhaps some help .... ...

Perhaps some help ....


https://cimg5.ibsrv.net/gimg/www.corvetteforum.com-vbulletin/1040x2000/gm_numbers_84a8fc43d9c53d1212d3b82c078bd690c4f55503.jpg
Forum: C4 Tech/Performance
04-07-2024, 05:33 PM
Replies: 8
Views: 334
Posted By JoBy

It could be as simple as a broken VSS ( Vehicle...

It could be as simple as a broken VSS ( Vehicle Speed Sensor ) on the transmission.
A simple test would ne to connect another VSS to the cable an run it with a cordless drill. If speedo works then...
Forum: C4 Tech/Performance
03-19-2024, 05:59 PM
Replies: 16
Views: 559
Posted By JoBy

This is a good page where you see different...

This is a good page where you see different variation of the parts over the years.
https://mirrockcorvette.com/c4-parts-guide/part-tables/suspension/#suspension-rear

The main suspansion change is...
Forum: C4 Tech/Performance
03-19-2024, 05:39 PM
Replies: 27
Views: 751
Posted By JoBy

Perhaps you got a 1988-1996 rack? Those are...

Perhaps you got a 1988-1996 rack? Those are different from 1984-1987 and probably related to suspension and wheel offset change.
Forum: C4 Tech/Performance
03-15-2024, 09:01 PM
Replies: 17
Views: 404
Posted By JoBy

Amber should only be blinking for turn signal or...

Amber should only be blinking for turn signal or hazard.
Low power red is parking or headlight on.
High power red is brake light.
Forum: C4 Tech/Performance
02-18-2024, 07:24 PM
Replies: 8
Views: 340
Posted By JoBy

The bump stop on the frame and then the trailing...

The bump stop on the frame and then the trailing arms are your first obstacles. Then anti sway bar and the frame. All this without narrowing the rear, only using a rim with more backspace.
Forum: C4 Tech/Performance
02-11-2024, 08:15 AM
Replies: 4
Views: 191
Posted By JoBy

Sometimes mine went black and turn signals and...

Sometimes mine went black and turn signals and high beam indicators started glowing at the same time. Tapping the dash and it went back to normal for a while.
The problem was with the ground pin...
Forum: C4 Tech/Performance
02-10-2024, 04:13 AM
Replies: 5
Views: 380
Posted By JoBy

One thing I did over 20 years ago after removing...

One thing I did over 20 years ago after removing A/C was to modify the fan housing.
On cars models with A/C as option there were often a smaller fan housing without the evaporator, and a bigger...
Forum: C4 Tech/Performance
02-05-2024, 05:28 PM
Replies: 27
Views: 807
Posted By JoBy

This is a bind angle comparison between stock and...

This is a bind angle comparison between stock and my Strange shafts with Vansteel before machining. Choosing weld ends with more clearence for Vansteel caps would be a much better solution, and still...
Forum: C4 Tech/Performance
02-04-2024, 06:11 PM
Replies: 27
Views: 807
Posted By JoBy

I had my built by STRANGE and they came out nice....

I had my built by STRANGE and they came out nice. Only problem was that I also got Vansteel straps for u-joints. Combined they caused a bind so I had to machine the half shafts for clearance.
...
Forum: C4 Tech/Performance
01-30-2024, 06:01 PM
Replies: 14
Views: 375
Posted By JoBy

The additive is a friction modifier. If the...

The additive is a friction modifier.
If the clutches grab too much they will stick and you will notice most when turning at slow speed.
The clutches will stick, release and stick and turning will...
Forum: C4 Tech/Performance
01-21-2024, 03:03 PM
Replies: 24
Views: 648
Posted By JoBy

I don't see that complicating much. Both pumps...

I don't see that complicating much. Both pumps run on the same signal from ECU.
One more benefit is that it can be added later so no problem keeping the stock tank for now.
I have not researched...
Forum: C4 Tech/Performance
01-21-2024, 05:52 AM
Replies: 24
Views: 648
Posted By JoBy

Did you consider my post? An addittional small...

Did you consider my post? An addittional small surge tank will tick all those boxes ...
* Keep stock tank unmodifieed.
* Stock fuel pump will ha a lot more flow unrestricted.
* Surge tank can be...
Forum: C4 Tech/Performance
01-17-2024, 05:45 PM
Replies: 10
Views: 388
Posted By JoBy

This is the definition I have for 1985-1988 TPI. ...

This is the definition I have for 1985-1988 TPI.

For 160 baud data byte 18, bit 6:
1 = FAN REQUEST BIT

You can check byte 18 in raw data tab and convert to binary do double check id WinALDL...
Forum: C4 Tech/Performance
01-10-2024, 03:18 PM
Replies: 24
Views: 648
Posted By JoBy

I started using E85 back in 2005 and no problems...

I started using E85 back in 2005 and no problems at all with the tank.
Forum: C4 Tech/Performance
01-10-2024, 02:39 PM
Replies: 24
Views: 648
Posted By JoBy

I put a surge tank behind the right rear wheel....

I put a surge tank behind the right rear wheel. Stock location pump fill the surge tank and a return from top of surge tank back to main tank.

Fuel pump to engine from surge tank and return from...
Forum: C4 Tech/Performance
01-03-2024, 06:52 PM
Replies: 6
Views: 272
Posted By JoBy

The 1983, and 1984 base wheels were supposed to...

The 1983, and 1984 base wheels were supposed to be these 15"x7" with 17mm offest and Goodyear Eagle GT, P215/65R-15.
All 1984 were sold with 16" wheels, but 1984-1987 suspension should work with 15"...
Forum: C4 Tech/Performance
12-05-2023, 12:50 PM
Replies: 7
Views: 475
Posted By JoBy

It is something wrong with that cluster. I think...

It is something wrong with that cluster. I think the polarizing film is installed inverted,
It should be bright numbers on dark background like on this picture:

...
Forum: C4 Tech/Performance
11-23-2023, 04:27 PM
Replies: 21
Views: 669
Posted By JoBy

I used a LI1 spec pump that is more powerful than...

I used a LI1 spec pump that is more powerful than the 85 and had np problems with fuel pressure on my 84. You must have a restriction on the fuer return, but the 84 spec pump is too weak to build...
Forum: C4 Tech/Performance
11-23-2023, 04:17 PM
Replies: 2
Views: 170
Posted By JoBy

Did you check the CTSY/CLK fuse? ...

Did you check the CTSY/CLK fuse?

https://cimg1.ibsrv.net/gimg/www.corvetteforum.com-vbulletin/850x1100/image_0ba425474948623937399aa249477c1fb592ce67.png
...
Forum: C4 Tech/Performance
10-22-2023, 02:18 PM
Replies: 13
Views: 488
Posted By JoBy

spring touching the half shaft. Go back to...

spring touching the half shaft. Go back to composite spring :)
Forum: C4 Tech/Performance
10-14-2023, 11:08 AM
Replies: 29
Views: 1,253
Posted By JoBy

Impressive how strong those thin aluminum A-arms...

Impressive how strong those thin aluminum A-arms are.
Forum: C4 Tech/Performance
09-03-2023, 03:10 AM
Replies: 7
Views: 318
Posted By JoBy

http://winaldl.joby.se/ I started writing...

http://winaldl.joby.se/

I started writing that scanner software over 20 years ago when my Corvette still was a CrossFire.
It works on newer Windows and you only need an USB to serial RS232...
Forum: C4 Tech/Performance
07-24-2023, 07:37 PM
Replies: 18
Views: 612
Posted By JoBy

These are the 1988 base 16" wheels: Goodyear...

These are the 1988 base 16" wheels:
Goodyear Eagle VR50, P255/50VR-16
http://www.joby.se/corvette/div/corvette_wheels/88_16.jpeg

These are the 1988 optional, and more common, 17" wheels:...
Forum: C4 Tech/Performance
07-14-2023, 07:00 PM
Replies: 40
Views: 1,867
Posted By JoBy

I know there is a process where you mount and...

I know there is a process where you mount and re-mount the tire in different rotation on the rim. By checking wheel balance in each step the most optmal rotation can be calculated. With tire mounted...
Showing results 1 to 25 of 496
 
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