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Search: Posts Made By: Lonnie P
Showing results 1 to 50 of 500
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Forum: Transmissions and Drivetrain
04-01-2024, 09:12 PM
Replies: 13
Views: 787
Posted By Lonnie P

Re: 4l80e swap slip yoke question

You can use a slip yoke with that output shaft, but it requires one with a counterbore machined in the end (splines removed) for more engagement depth.

Using a standard fully splined yoke does not...
Forum: LTX and LSX
03-19-2024, 05:22 PM
Replies: 93
Views: 4,468
Posted By Lonnie P

Re: 1991 Formula LS9 Build

I made an insert for the gear indicator.

Then I milled it to hold the line lock & trans brake buttons....
Forum: Transmissions and Drivetrain
03-05-2024, 06:43 PM
Replies: 21
Views: 745
Posted By Lonnie P

Re: Trans cooler line fitting O-ring?

The trans is actually 1/4" NPS which is straight pipe thread, not tapered.
It is 18 threads per inch but slightly over 1/2" at .533.

-6 AN is 9/16"-18 so it should be easy to modify if necessary,...
Forum: LTX and LSX
02-19-2024, 06:39 PM
Replies: 93
Views: 4,468
Posted By Lonnie P

Re: 1991 Formula LS9 Build

Good idea, I never really thought about it. That wire is for the trans brake so I just matched the connection it came with.
All other connectors in the car are weather pack style so I should be...
Forum: LTX and LSX
02-18-2024, 11:30 PM
Replies: 93
Views: 4,468
Posted By Lonnie P

Re: 1991 Formula LS9 Build

I made a little more progress today on the oil cooler lines.

A word of advice to anyone putting in a 4L80E.... connect the trans cooler lines first, before putting the transmission in.

You can...
Forum: LTX and LSX
02-12-2024, 07:58 PM
Replies: 93
Views: 4,468
Posted By Lonnie P

Re: 1991 Formula LS9 Build

My brake lines are still in the factory location, but I have new braided stainless -8 & -6 fuel lines installed in a foil covered fiberglass heat shield close to the factory location.
...
Forum: LTX and LSX
02-11-2024, 09:30 PM
Replies: 93
Views: 4,468
Posted By Lonnie P

Re: 1991 Formula LS9 Build

Slow progress today...
I was able to make a tube to protect the trans lines from the exhaust & flywheel.

I never liked how the lines are exposed in this area & considered one of the cast dust...
Forum: Wheels and Tires
02-11-2024, 08:48 PM
Replies: 10
Views: 425
Posted By Lonnie P

Re: Lowered car 15x8 what slicks?

I guess the best questions would be, what is your power level & since your car is lowered, how low is it?

A 1.5" drop & 28" tires will be very close.
What offset are your wheels?

The radials...
Forum: LTX and LSX
02-10-2024, 09:47 PM
Replies: 93
Views: 4,468
Posted By Lonnie P

Re: 1991 Formula LS9 Build

For those that build cars, here is something that most can relate to...

A friend of mine calls it the "Rule of 5's"
For everything you change or modify, it seems to affect 5 other things.

Here...
Forum: LTX and LSX
02-06-2024, 10:09 PM
Replies: 93
Views: 4,468
Posted By Lonnie P

Re: 1991 Formula LS9 Build

I forgot to take a picture of the cable bracket before I installed it on the trans or before modification.

This is what I started with....
Forum: LTX and LSX
02-04-2024, 12:23 AM
Replies: 93
Views: 4,468
Posted By Lonnie P

Re: 1991 Formula LS9 Build

I worked on the shifter install, which turned out to be a bigger project than expected.

When you look into aftermarket shifters for a Firebird, they all say "not for factory console".
I figured I...
Forum: LTX and LSX
01-29-2024, 05:19 PM
Replies: 14
Views: 681
Posted By Lonnie P

Re: Off the shelf cold air intakes?

It's pretty easy to make... just 2 45's & 1 90-degree elbow & a straight section of pipe.
Put the stock style MAF in the pipe where convenient with 2 more couplers or if you are into tuning, a 4"...
Forum: LTX and LSX
01-23-2024, 09:49 PM
Replies: 93
Views: 4,468
Posted By Lonnie P

Re: 1991 Formula LS9 Build

The old "ET Street" has been replaced by the "ET Street R bias".
Part number 3561.

They do not make a 26" version.
Forum: LTX and LSX
01-23-2024, 07:00 PM
Replies: 93
Views: 4,468
Posted By Lonnie P

Re: 1991 Formula LS9 Build

Actually, that is a bias tire, not a radial. It will be more noticeable once it has air in it.
It is basically identical to a 28 x 10.50 slick.
Speaking with Mickey Thompson, it is closer in design...
Forum: LTX and LSX
01-22-2024, 10:30 PM
Replies: 93
Views: 4,468
Posted By Lonnie P

Re: 1991 Formula LS9 Build

As promised, here is a picture of the interference area. At full droop, the tread is against the inner fender....
Forum: LTX and LSX
01-20-2024, 02:53 PM
Replies: 93
Views: 4,468
Posted By Lonnie P

Re: 1991 Formula LS9 Build

Yes, it is very tight at the front corner near the control arm. I will be modifying that next & post some pictures.



I had issues with the 3M staying sticky.
Quite a few years back, I found a...
Forum: LTX and LSX
01-14-2024, 09:35 PM
Replies: 93
Views: 4,468
Posted By Lonnie P

Re: 1991 Formula LS9 Build

I started making room for larger tires.

I test fitted a set of 28 x 10.50 slicks under the car that I have for my S10 & of course the bump stops are against the tires with 6.5" BS wheels.
They...
Forum: LTX and LSX
01-01-2024, 10:46 PM
Replies: 93
Views: 4,468
Posted By Lonnie P

Re: 1991 Formula LS9 Build

I'm talking about the torque arm that broke, not the crossmember.
The 4" lg. straight pin broke off the front.
Forum: LTX and LSX
01-01-2024, 09:15 PM
Replies: 93
Views: 4,468
Posted By Lonnie P

Re: 1991 Formula LS9 Build

I did a few quick measurements today & it appears the V-band, the loop around the pipe & the gussets at the frame connectors are all within 1/4" of each other.
Time will tell...

As for the...
Forum: LTX and LSX
01-01-2024, 11:34 AM
Replies: 93
Views: 4,468
Posted By Lonnie P

Re: 1991 Formula LS9 Build

Yes, your crossmember was way lower than mine is... It appears your entire crossmember tube was below the subframe connectors.

That also helps to explain why my torque arm link is so close to the...
Forum: LTX and LSX
01-01-2024, 09:27 AM
Replies: 93
Views: 4,468
Posted By Lonnie P

Re: 1991 Formula LS9 Build

Do you either of you have any pics of the installed height of your crossmember?

I installed mine as high as possible.
The outer brackets hang down less than 3/4" the way I have it installed &...
Forum: LTX and LSX
12-31-2023, 11:29 AM
Replies: 93
Views: 4,468
Posted By Lonnie P

Re: 1991 Formula LS9 Build

For more driveshaft clearance I modified the torque arm link.
https://cimg7.ibsrv.net/gimg/www.thirdgen.org-vbulletin/2000x1504/img_4697_small_f05be227167af96a9689db290ab420e3f2d936e1.jpeg

The...
Forum: LTX and LSX
12-30-2023, 10:25 AM
Replies: 93
Views: 4,468
Posted By Lonnie P

Re: 1991 Formula LS9 Build

I have not finalized it yet, but this is how the whole mess started....
The 4L80E is much larger than the factory trans, so it hit the floor on the right where the tail housing bolts on.

i wanted...
Forum: LTX and LSX
12-29-2023, 10:20 PM
Replies: 93
Views: 4,468
Posted By Lonnie P

Re: 1991 Formula LS9 Build

Due to the low ride height, the crossmember would be less than 3" off the ground.
...
Forum: LTX and LSX
12-28-2023, 10:12 PM
Replies: 93
Views: 4,468
Posted By Lonnie P

Re: 1991 Formula LS9 Build

Finally, I am back on this project?

First item was finishing up the wiper motor....
Forum: LTX and LSX
10-15-2023, 10:20 PM
Replies: 11
Views: 524
Posted By Lonnie P

Re: Driveshaft seems to be too long

Verify that your mounts are different side to side...
I have been looking for a better photo, but mine appear to be opposite of yours with the extended length side facing the rear.
This would move...
Forum: LTX and LSX
10-15-2023, 07:57 PM
Replies: 11
Views: 524
Posted By Lonnie P

Re: Driveshaft seems to be too long

Clam shells... refer to the picture I posted.
Forum: LTX and LSX
10-15-2023, 08:22 AM
Replies: 11
Views: 524
Posted By Lonnie P

Re: Driveshaft seems to be too long

It's hard to tell from the pictures, but it looks like your motor mounts are on the wrong side.
This will move the engine back from where it should be.
...
Forum: LTX and LSX
10-14-2023, 08:51 PM
Replies: 93
Views: 4,468
Posted By Lonnie P

Re: 1991 Formula LS9 Build

The hood brace at the passenger front corner of the super charger.
Forum: LTX and LSX
10-13-2023, 08:38 PM
Replies: 93
Views: 4,468
Posted By Lonnie P

Re: 1991 Formula LS9 Build

I would proceed with caution as mine barely clears & may be more related to mount type & engine angle.
5/16" is next to nothing & doesn't leave much room for error.
Are you using the Kong lid? It...
Forum: LTX and LSX
05-24-2023, 10:59 PM
Replies: 93
Views: 4,468
Posted By Lonnie P

Re: 1991 Formula LS9 Build

I did have the reverse flow muffler that has since been discontinued. It was very mild sounding, but I used this muffler on my S10.

I have not yet heard it with the straight through louvered core...
Forum: LTX and LSX
05-23-2023, 09:12 PM
Replies: 93
Views: 4,468
Posted By Lonnie P

Re: 1991 Formula LS9 Build

It started as the Hawks/Stainless Works 3.5" system.

The headers are 2" primary.

I am adding cutouts, so I have a quiet cruise & still all the flow I need at full throttle.
Forum: LTX and LSX
05-09-2023, 09:36 PM
Replies: 93
Views: 4,468
Posted By Lonnie P

Re: 1991 Formula LS9 Build

Progress on the car has been slow as I got involved in getting my S10 ready for summer.

It turns out my engine was sitting crooked in the engine bay, so I needed to raise the right side...
Forum: LTX and LSX
04-11-2023, 08:45 PM
Replies: 21
Views: 768
Posted By Lonnie P

Re: Holley HP ECM power requirements

Are you saying the main power feed to the ECM?
I'm putting together a Terminator system with the same cable that has a 40A fuse in it.
Also... why there is a 40A fuse in a 10Ga wire, is beyond me,...
Forum: LTX and LSX
04-09-2023, 08:40 PM
Replies: 93
Views: 4,468
Posted By Lonnie P

Re: 1991 Formula LS9 Build

I did some work on the battery mounting.
I wanted a disconnect for the rear mounted battery but did not want an ugly handle sticking out of or under the bumper.

I started with a BMR battery box...
Forum: LTX and LSX
04-06-2023, 09:03 PM
Replies: 93
Views: 4,468
Posted By Lonnie P

Re: 1991 Formula LS9 Build

I got my trans & oil coolers.
I'm trying to get everything aligned before I start mounting things.
Fans will be thermostatically controlled....
Forum: LTX and LSX
04-05-2023, 08:17 PM
Replies: 3
Views: 459
Posted By Lonnie P

Re: 89 formula ls2 t56 swap

You can try a few things...
First, loosen the header bolts & pull down on the collector & re-tighten.

I've also put a pipe over the collector & pulled down on the header to tweak it a bit.
I...
Forum: LTX and LSX
03-20-2023, 07:37 PM
Replies: 93
Views: 4,468
Posted By Lonnie P

Re: 1991 Formula LS9 Build

I also contemplated black window urethane as it dries flexible, sticks to everything & can be sanded & shaped afterwards.

I got my Chromoly Strange pinion yoke today & measured for my new...
Forum: LTX and LSX
03-20-2023, 07:20 PM
Replies: 14
Views: 698
Posted By Lonnie P

Re: 450 Pump Install

The current draw of the 450 pump exceeds the rating (13A) of the yellow pass-through connector in the fuel hat.
Forum: LTX and LSX
03-19-2023, 10:24 PM
Replies: 93
Views: 4,468
Posted By Lonnie P

Re: 1991 Formula LS9 Build

I now have clearance, but I will need to do a little bit of plastic welding.
...
Forum: LTX and LSX
03-15-2023, 11:03 PM
Replies: 93
Views: 4,468
Posted By Lonnie P

Re: 1991 Formula LS9 Build

The one on my S10 also looked like the proper orientation, but the number of wires were different.
Without the delay wipers, it would be an easier swap.
Forum: LTX and LSX
03-15-2023, 08:41 PM
Replies: 93
Views: 4,468
Posted By Lonnie P

Re: 1991 Formula LS9 Build

I heard the Nissan motor works but is not really correct with respect to the wiper stroke & also the delay function is compromised.
Even though I do not drive it in it the rain, I could not do a...
Forum: LTX and LSX
03-15-2023, 08:26 PM
Replies: 93
Views: 4,468
Posted By Lonnie P

Re: 1991 Formula LS9 Build

Prior to the engine install I knew i had a wiper motor clearance issue.

I started by cuting 1/2" from the mounting feet for more clearance.

I could not go further as the hole in firewall was...
Forum: LTX and LSX
03-13-2023, 08:24 PM
Replies: 93
Views: 4,468
Posted By Lonnie P

Re: 1991 Formula LS9 Build

I am also concerned with the exhaust o-rings... I will slip in a set of gaskets, if necessary, down the road.
Fingers crossed.

As for the pan, it was necessary with the trans brake for internal...
Forum: LTX and LSX
03-12-2023, 01:32 PM
Replies: 93
Views: 4,468
Posted By Lonnie P

Re: 1991 Formula LS9 Build

It is finally in.
https://cimg5.ibsrv.net/gimg/www.thirdgen.org-vbulletin/795x487/ls9_installed_0767e11e1031f1191bb75190211abfcee920187b.jpeg

I have just over 5/16" clearance to the hood at the...
Forum: LTX and LSX
03-10-2023, 10:51 PM
Replies: 93
Views: 4,468
Posted By Lonnie P

Re: 1991 Formula LS9 Build

Making some more progress.

Engine is finally back in the cradle.
https://cimg3.ibsrv.net/gimg/www.thirdgen.org-vbulletin/800x600/img_4179_small_206d937809383157045c3dc3d4d17781ffcf55f1.jpg

...
Forum: LTX and LSX
02-25-2023, 09:11 AM
Replies: 93
Views: 4,468
Posted By Lonnie P

Re: 1991 Formula LS9 Build

Another interesting dilemma is the factory crank has a 9 bolt flywheel flange & all ZR1 Vettes were manuals.
Since I'm going with a 4l80E I had to find a flywheel.

TCI makes one but was...
Forum: LTX and LSX
02-09-2023, 06:43 AM
Replies: 93
Views: 4,468
Posted By Lonnie P

Re: 1991 Formula LS9 Build

I had the supercharger ported by Jokerz Performance.
The snout was extensively modified/welded to mate up to a 102mm throttle body.
It was extensively welded underneath to remove the factory water...
Forum: LTX and LSX
02-05-2023, 09:53 PM
Replies: 93
Views: 4,468
Posted By Lonnie P

Re: 1991 Formula LS9 Build

I couldn't get by with just upping the pulleys.

I was going to port the factory heads, but by the time I paid for porting, springs & retainers, I figured it was better to buy new & sell the old...
Forum: LTX and LSX
02-05-2023, 07:35 PM
Replies: 93
Views: 4,468
Posted By Lonnie P

Re: 1991 Formula LS9 Build

It was close but the LS9 is quite different. The big ends of the rods are larger than most & the center crank throws were also larger.
It only took me about an hour to get it fitting properly.
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