Recent content by Mark Gilbert

M
L29 454 MODS

True, but it doesn't NEED a 4x cam sensor. Here is the whole article I used. http://www.gmtruckcentral.com/articles/24x.html I already had an 0411 PCM and a licensed LS tune file. The only components I needed to buy were the: Coil Packs Wiring connectors Pins for the PCM I bought color coded...
- Mark Gilbert
- Post #13
- Jul 7, 2020
- Forum: 96+ Vortec Performance + Computer Swaps
M
L29 454 MODS

You still use the cam sensor in the distributor. In fact you still need to set the distributor position to correlate with the crank sensor. You just don't have any high voltage traveling through the distributor. They sell a blank distributor cap too...
- Mark Gilbert
- Post #11
- Jul 6, 2020
- Forum: 96+ Vortec Performance + Computer Swaps
M
L29 454 MODS

I agree. I didn't mean to say they hurt performance when they work right. They just seem to be a weak link because they fail and will cross fire inside the cap. I did it on my 99 2500 suburban. It uses the reluctor wheel and crank sensor from the L21 big block which is a vortec 454 with coil...
- Mark Gilbert
- Post #6
- Jul 2, 2020
- Forum: 96+ Vortec Performance + Computer Swaps
M
L29 454 MODS

Honestly I thought the weakest link in the vortec motors was that stupid distributor cap. On the 454 it is really cheap and easy to convert to coil near plug ignition if you already have the 0411 PCM. You can buy the reluctor wheel from GM for about $40 compared to a couple hundred for the 350...
- Mark Gilbert
- Post #3
- Jul 2, 2020
- Forum: 96+ Vortec Performance + Computer Swaps
M
In need of spreadsheet for 96 tahoe to 411 pcm swap

Not it. At least I didn't have to
- Mark Gilbert
- Post #7
- Jun 30, 2020
- Forum: 96+ Vortec Performance + Computer Swaps
M
Corona Build

The problem with the larger front axle is that it will bolt into the frame with small fabrication, but because it is a larger carrier it moves the axle to the passenger side by about an inch or so. This makes the passenger axle too long and the drivers side too short.
- Mark Gilbert
- Post #18
- May 11, 2020
- Forum: Member Trucks
M
1999 2 door Tahoe 6.0 swap

He didn't run any to my knowledge, but I can't verify if he should have....
- Mark Gilbert
- Post #10
- May 7, 2020
- Forum: Offroad Build Threads
M
1999 2 door Tahoe 6.0 swap

It was a while back. There was a lot of bullshit to figure out regarding which set of control arms to use and I believe he had to use the 2500 lowers and the 1500 uppers and then use the spindle from the 2500. The CV shaft should fit both, but the front axle will not work because it moves to the...
- Mark Gilbert
- Post #7
- May 6, 2020
- Forum: Offroad Build Threads
M
1999 2 door Tahoe 6.0 swap

Even if you buy all of the 4x4 parts, the frame mounting locations have some differences, my buddy tried this in a 92 suburban and had a hell of a time making it work. Just thought about it, you didn't say 4x4, I just assumed. 4x2 might be much easier... I have no experience for that.
- Mark Gilbert
- Post #2
- May 5, 2020
- Forum: Offroad Build Threads
M
Carbed 400 ci into 2000 k2500 crewcab

If you go on www.Gearhead-efi.com there is a guy who is using an old (91 or so, I think it is a 7060 PCM) PCM to run the 4l80e on a carbed motor. He was talking about the idea to make a cheap control module to run the 4l80e. You will still need a couple sensors, and one of them will be a TPS on...
- Mark Gilbert
- Post #8
- May 5, 2020
- Forum: LSX + Carb Swaps
M
Worth upgrading to GMT800?

Fair enough, but you always quote your vehicle which is not stock. You can upgrade the components on any vehicle and make an improvement even if you use off the shelf parts. I am explaining my experience with 2 completely stock braking systems just from different generations.
- Mark Gilbert
- Post #72
- Apr 24, 2020
- Forum: Towing
M
Worth upgrading to GMT800?

Both vehicles are hydroboost, and pulling my trailer (around 5,500lbs to 6,500lbs) The brakes seem to be better on the later model. I'm not saying you can't make the brakes work better on the older vehicle, but in my experience stock vs stock on both my 98 1500 vs my 2002 1500 and my 99 2500...
- Mark Gilbert
- Post #70
- Apr 23, 2020
- Forum: Towing
M
Need stock ECM for 99 K3500

Which motor are you running? I have blackbox PCM's for both the 350 and 454. The 350 has the 4l60e and I have 2 for 454 with the 4l80e. They are both 4 connector blackboxes for the 98-99. If you pay the shipping you can have all 3 that I have.
- Mark Gilbert
- Post #2
- Apr 14, 2020
- Forum: 96+ Vortec Performance + Computer Swaps
M
Best techniques for finding vacuum leaks...?

I have not had good luck with WD-40 since it is not flammable, it is combustible. When I was a kid you could take a lighter and spray WD-40 over it and have your little flame thrower. This did not work the last time I tried it, nor did it work to start a lawn mower engine when I was diagnosing...
- Mark Gilbert
- Post #19
- Mar 19, 2020
- Forum: Audio + Electronics
M
A/C trouble

Unfortunately more information is really needed to help you diagnose your issue. Does your compressor actually turn? Not just the pulley but the center of the hub? If it is turning then you should have both a high and low side gauge hooked up. Those pressures can help you determine several...
- Mark Gilbert
- Post #5
- Mar 6, 2020
- Forum: Audio + Electronics