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Search: Posts Made By: raptere
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Forum: DIY PROM
Today, 05:32 PM
Replies: 23
Views: 579
Posted By raptere

Re: NOT solved... 91 Z28 Undrivable, Surging, Stumbling... HELP PLEASE!

So what do you suggest, both new and old ECM's were Cardone remans 77-7730. Different serial numbers and some different ID numbers on the board itself, but interestingly quality inspected by the same...
Forum: DIY PROM
Today, 05:29 PM
Replies: 23
Views: 579
Posted By raptere

Re: NOT solved... 91 Z28 Undrivable, Surging, Stumbling... HELP PLEASE!

I think I found you have to go advanced while editing the first post of the thread, not a subsequent one...
Forum: DIY PROM
Today, 05:28 PM
Replies: 23
Views: 579
Posted By raptere

Re: NOT solved... 91 Z28 Undrivable, Surging, Stumbling... HELP PLEASE!

Yup battery terminals are tight... i did do a slam test again yesterday with the new ICM, and the engine speed did not change at all, so maybe the circuitry in the icm was being chaken by the hood...
Forum: DIY PROM
Yesterday, 11:48 AM
Replies: 23
Views: 579
Posted By raptere

Re: NOT solved... 91 Z28 Undrivable, Surging, Stumbling... HELP PLEASE!

Well... just finished replacing the ICM, and everything seems back to normal now, even with the original ECU. But honestly I don't really trust it, I'll have to do some closer to home trips, before...
Forum: DIY PROM
Yesterday, 08:11 AM
Replies: 23
Views: 579
Posted By raptere

Re: 91 Z28 Undrivable, Surging, Stumbling... HELP PLEASE!

TURNS OUT ITS NOT SOLVED! HAAAA!!! SO MUCH FOR MY AUTOX EVENT THAT STARTED 5 MIN AGO...

I'm starting to think this a more general electrical gremlins issue... if you need to move the thread that's...
Forum: DIY PROM
05-16-2024, 10:14 PM
Replies: 23
Views: 579
Posted By raptere

Re: 91 Z28 Undrivable, Surging, Stumbling... HELP PLEASE!

Ohhhhhhkay....

I'm still processing this all, but I just tried the screwdriver test and yes, the engine rpm dropped, and it went into this low rpm undulation. So that indicates the ECU was bad.
...
Forum: DIY PROM
05-16-2024, 08:01 PM
Replies: 23
Views: 579
Posted By raptere

Re: 91 Z28 Undrivable, Surging, Stumbling... HELP PLEASE!

Please explain this ECM screw driver test???

Is post #2 what you're talking about?
VSS output signal from ECM - Third Generation F-Body Message Boards...
Forum: DIY PROM
05-16-2024, 07:57 PM
Replies: 23
Views: 579
Posted By raptere

Re: 91 Z28 Undrivable, Surging, Stumbling... HELP PLEASE!

If this needs to be moved to another section that is fine, I am doing some tuning to the Prom, but it was relating to torque converter lockup. I didn't know if it had any effect.

I was able to...
Forum: DIY PROM
05-16-2024, 07:43 PM
Replies: 23
Views: 579
Posted By raptere

Re: 91 Z28 Undrivable, Surging, Stumbling... HELP PLEASE!

Took some videos today while doing some tests...
https://youtu.be/-aieLwG7BH0?si=deg6jzwfvG7fOOuP
https://youtu.be/nB_L1gaarHg?si=GPvGZyxwzHkT4Pm8
https://youtu.be/AAK0lprjRck?si=lXAReU2-kkhqEzYl...
Forum: DIY PROM
05-16-2024, 08:28 AM
Replies: 23
Views: 579
Posted By raptere

Re: 91 Z28 Undrivable, Surging, Stumbling... HELP PLEASE!

Data Log zipped and attached.

One additional test I did was disconnecting the battery for 30 sec to reset the ECU then starting back up, and it continued to surge and stumble immediately after...
Forum: Organized Drag Racing and Autocross
05-16-2024, 07:31 AM
Replies: 171
Views: 9,942
Posted By raptere

Re: (Not So) Bare Minimum to Give Autox or Track Racing a Shot?

Happy spring everyone! I was supposed to go to my first event this weekend, but out of the blue, my car has decided to become completely undrivable. Litterally it surges and stumbles constantly, even...
Forum: DIY PROM
05-16-2024, 07:26 AM
Replies: 23
Views: 579
Posted By raptere

Re: 91 Z28 Undrivable, Surging, Stumbling... HELP PLEASE!

yes ypur assumptions are correct
More details in my sig. I'll zip the file and post it shortly.

Another symptom I forgot to mention. CEL is on and flashes at times when the engine struggles to...
Forum: DIY PROM
05-16-2024, 12:43 AM
Replies: 23
Views: 579
Posted By raptere

NOT solved... 91 Z28 Undrivable, Surging, Stumbling... HELP PLEASE!

Hey all,

I have an issue that is beyond me... I suspect it is an ECU related issue, but if it is not, I may have to move this thread to another board.

My Camaro which was running nearly...
Forum: Engine/Drivetrain/Suspension Parts for Sale
05-02-2024, 04:21 PM
Replies: 5
Views: 703
Posted By raptere

Re: B&M Transmission Cooler - $70 Shipped

I'm Interested... What was your trans setup? Was this sufficient cooling for the application?
Forum: Tech / General Engine
04-09-2024, 12:04 AM
Replies: 91
Views: 2,762
Posted By raptere

Re: Order of Engine Upgrades? Heads, then Cam?

Wow, that was a lot to read and digest. Not sure if it was lost through the thread, but I am running a holley stealth ram, I'll have to look up the port dimensions and calculate csa. (Cross sectional...
Forum: TPI
04-07-2024, 04:50 PM
Replies: 16
Views: 1,907
Posted By raptere

Re: which afr heads 0918 or 0919 ?

I know I'm digging this thread up from the grave, but I have a question on the same topic. Aside from the center four intake bolt angles, I'm reading on summit, the 919 is driller for perimeter AND...
Forum: Suspension and Chassis
04-05-2024, 07:08 AM
Replies: 33
Views: 3,865
Posted By raptere

Re: Front Wheel Bearing Spacers

Didn't realize that was you on YouTube, you make really awesome videos! I've watched and relied on MANY of them, thanks for creating them all!
Forum: Engine/Drivetrain/Suspension Parts for Sale
04-04-2024, 09:32 AM
Replies: 5
Views: 1,164
Posted By raptere

Re: Lingenfelter

Any chance you decided to separate and the heads are still available?
Forum: Tech / General Engine
04-02-2024, 10:48 AM
Replies: 91
Views: 2,762
Posted By raptere

Re: Order of Engine Upgrades? Heads, then Cam?

I added the CNC Eliminator 180s to my chart and curves. The difference is really pretty staggering, improved flow across the board, while maintaining velocity. I think that has to be the right choice...
Forum: Tech / General Engine
03-31-2024, 11:32 PM
Replies: 91
Views: 2,762
Posted By raptere

Re: Order of Engine Upgrades? Heads, then Cam?

Don't go throwing what I though was clear logic upside down!!! LOL! :hmmm:

I think the big thing that people may not be considering is the as cast vs CNC bit, it makes a huge difference to flow...
Forum: Tech / General Engine
03-31-2024, 07:47 PM
Replies: 91
Views: 2,762
Posted By raptere

Re: Order of Engine Upgrades? Heads, then Cam?

So, I had a few more emails back and forth with Mike Jones, and he really helped me crystalize the situation and my options, which I think should be helpful for others.

When I explained I was...
Forum: Tech / General Engine
03-29-2024, 10:49 PM
Replies: 91
Views: 2,762
Posted By raptere

Re: Order of Engine Upgrades? Heads, then Cam?

I didn't realize I never explained my intentions... I have another thread that outlines in more detail what I have been up to:...
Forum: Tech / General Engine
03-29-2024, 04:36 PM
Replies: 91
Views: 2,762
Posted By raptere

Re: Order of Engine Upgrades? Heads, then Cam?

That is a valid point, I said my plan was to go with the AFR 195's. I think I'm still leaning that way, unless someone can convince me the 180 cc heads are really going to work that much better than...
Forum: Tech / General Engine
03-29-2024, 10:20 AM
Replies: 91
Views: 2,762
Posted By raptere

Re: Order of Engine Upgrades? Heads, then Cam?

The next and more pressing quandry is heads! I think given the disucssion here and elsewhere, I just need to bite the bullet slowly buy the parts as I can afford them and do all the install at once...
Forum: Tech / General Engine
03-29-2024, 09:52 AM
Replies: 91
Views: 2,762
Posted By raptere

Re: Order of Engine Upgrades? Heads, then Cam?

Hey, I'm back, the OP... Life kind of got in the way for a while, actually I've been busy sim racing a lot too!

So, I've got a 10% off summit coupon that expires at the end of the month, so I want...
Forum: Tech / General Engine
01-06-2024, 03:52 PM
Replies: 91
Views: 2,762
Posted By raptere

Re: Order of Engine Upgrades? Heads, then Cam?

I really appreciate the responses!

The story is I've been wanting to do heads and a cam for years, but each time I start planning it out, I start realizing how many parts and seals, and cost ends...
Forum: Tech / General Engine
01-04-2024, 04:35 PM
Replies: 91
Views: 2,762
Posted By raptere

Order of Engine Upgrades? Heads, then Cam?

Hey All,

So I have wanted to do heads and a CAM on my 91 Z for years, and I think I may be ready to start taking bites into it. It would be much easier on my bank account if I could do it in...
Forum: Organized Drag Racing and Autocross
01-04-2024, 03:35 PM
Replies: 171
Views: 9,942
Posted By raptere

Re: (Not So) Bare Minimum to Give Autox or Track Racing a Shot?

That's awesome to hear! Very nice looking setup. I wonder have you been running flat triple monitors all along, or did you switch from another configuration. I happen to have the spare TV but I...
Forum: Organized Drag Racing and Autocross
01-04-2024, 03:30 PM
Replies: 171
Views: 9,942
Posted By raptere

Re: (Not So) Bare Minimum to Give Autox or Track Racing a Shot?

If you want to try it, just do it. In the spring sign up for an event, you can usually pay for a weekend membership so you're not investing a lot of money. Let them know you're a novice, and everyone...
Forum: Organized Drag Racing and Autocross
12-31-2023, 10:34 PM
Replies: 171
Views: 9,942
Posted By raptere

Re: (Not So) Bare Minimum to Give Autox or Track Racing a Shot?

Got all my mid level direct frive stuff from Fanatec a couple days ago! Load cell brake is way better than the potentiometer style. The 8 n-m of torque is no joke, makes it legit challenging....
Forum: Organized Drag Racing and Autocross
12-21-2023, 10:02 PM
Replies: 171
Views: 9,942
Posted By raptere

Re: (Not So) Bare Minimum to Give Autox or Track Racing a Shot?

Man, this is tough! I decided to go with iRacing, which is a true and brutal racing simulator, definitely not a game like Grand Turismo, and other video games.

I also decided to get some decent...
Forum: Organized Drag Racing and Autocross
12-15-2023, 11:18 PM
Replies: 171
Views: 9,942
Posted By raptere

Re: (Not So) Bare Minimum to Give Autox or Track Racing a Shot?

Now that my second season of racing has come to an end, and I was left to twiddle my thumbs for the cold months here in the Midwest, I decided to do something about it...

I'm building a Sim Rig...
Forum: Brakes
11-08-2023, 12:08 PM
Replies: 7
Views: 5,854
Posted By raptere

Re: Raybestos R-300 S Groove Sloted Rotors??? (Also sold as ACDelco, and Napa)

Another season of autocrossing on the books using these rotors. No issues to report!
Forum: Transmissions and Drivetrain
10-23-2023, 04:35 PM
Replies: 22
Views: 8,302
Posted By raptere

Re: Stuck on Transmission Removal

I ran into the same issue, reading through this thread gave me good ideas.

As long as all 6 bolts are out, you pb blaster the pins and bolt holes to get it into the seam, have the drives haft and...
Forum: Suspension and Chassis
10-12-2023, 04:58 PM
Replies: 33
Views: 3,865
Posted By raptere

Re: Front Wheel Bearing Spacers

That looks like an as manufactured nut on the end for use with the sheet metal castle caps which make securing so much easier! Where did you find those, what are their intended application??? I...
Forum: Transmissions and Drivetrain
10-10-2023, 12:55 PM
Replies: 9
Views: 1,508
Posted By raptere

Re: My Experience with 700R4 Shift Governor Tuning

10-8-23 UPDATE: Swapping the E weight for my modified one, got me to ~5400 RPM WOT 1-2 shift. This is about what I was looking for! Other springs and weights left the same. This was done at the same...
Forum: Organized Drag Racing and Autocross
10-10-2023, 12:51 PM
Replies: 171
Views: 9,942
Posted By raptere

Re: (Not So) Bare Minimum to Give Autox or Track Racing a Shot?

I got the new torque converter installed! It's a pretty significant difference. Still very streetable, everything just happens at a bit higher RPM. I also swapped to the next lighter weight in my...
Forum: Brakes
09-12-2023, 10:35 AM
Replies: 422
Views: 133,946
Posted By raptere

Re: Cheap Proportioning Valve Upgrade

Agreed, there is some questionable info here... I'll say I have been using the 1NCR5 and it gives me too much rear braking with my factory rear PBR discs, and front C6 Brembo discs. During a recent...
Forum: Brakes
09-12-2023, 09:27 AM
Replies: 28
Views: 3,992
Posted By raptere

Re: ATS (C7 Base) brakes on a 91 Z28 - My Experience

Word to those out there considering playing with their proportioning valve springs. In my setup at least it was brought to my attention that at a recent track event, when I braked heavy into one of...
Forum: Organized Drag Racing and Autocross
08-31-2023, 12:00 PM
Replies: 171
Views: 9,942
Posted By raptere

Re: (Not So) Bare Minimum to Give Autox or Track Racing a Shot?

I just ran the actual calculations on shortening my 1NCR5 spring in my brake bias valve. As expected, as you cut coils off the spring rate increases, but the free length decreases as well, so the...
Forum: Organized Drag Racing and Autocross
08-22-2023, 08:44 PM
Replies: 171
Views: 9,942
Posted By raptere

Re: (Not So) Bare Minimum to Give Autox or Track Racing a Shot?

So far with my track sprint event, I don't think It would make enough of a difference burning through fuel to need to compensate for brake bias mid event... interesting idea though!



I agree...
Forum: Organized Drag Racing and Autocross
08-21-2023, 09:15 PM
Replies: 171
Views: 9,942
Posted By raptere

Re: (Not So) Bare Minimum to Give Autox or Track Racing a Shot?

Just uploaded my best run from the Track Sprint at Autobahn:

https://youtu.be/ejw62nYyLog
Forum: Organized Drag Racing and Autocross
08-21-2023, 06:14 PM
Replies: 171
Views: 9,942
Posted By raptere

Re: (Not So) Bare Minimum to Give Autox or Track Racing a Shot?

First road course in the camaro was officially put on the books last Saturday afternoon at Autobah racing club in Joliet IL. It was pretty amazing and I was able to drive the car home which is a huge...
Forum: Organized Drag Racing and Autocross
08-06-2023, 06:54 PM
Replies: 171
Views: 9,942
Posted By raptere

Re: (Not So) Bare Minimum to Give Autox or Track Racing a Shot?

Definitly cool! Felt like you were dropping into a half pipe, or starting down a ski hill. Unfortunately it sounds like the last season for the track, the property is being sold.

I didn't mention...
Forum: Organized Drag Racing and Autocross
08-01-2023, 12:35 PM
Replies: 171
Views: 9,942
Posted By raptere

Re: (Not So) Bare Minimum to Give Autox or Track Racing a Shot?

At this point I'm seeking out the cheapest events that generally give the largest number of runs, to improve my skills. I do want to try some of those destination type events at some point once I get...
Forum: Organized Drag Racing and Autocross
07-31-2023, 05:31 PM
Replies: 171
Views: 9,942
Posted By raptere

Re: (Not So) Bare Minimum to Give Autox or Track Racing a Shot?

My best run of the day from yesterday! I admit the concrete walls were a little intimidating...

I wasn't thinking that much about it, but I'd say front end traction seemed to be much less of a...
Forum: Organized Drag Racing and Autocross
07-26-2023, 01:35 PM
Replies: 171
Views: 9,942
Posted By raptere

Re: (Not So) Bare Minimum to Give Autox or Track Racing a Shot?

I completed my rust cleanup of the underside of my strut towers, then installed the new UMI camber plates. Last night I just tried to do a camber adjustment using my magnetic camber measuring tool,...
Forum: Organized Drag Racing and Autocross
07-06-2023, 09:39 AM
Replies: 171
Views: 9,942
Posted By raptere

Re: (Not So) Bare Minimum to Give Autox or Track Racing a Shot?

Given my tire wear and roll even at high pressures, I decided I need more camber. So, I just ordered a set of the UMI camber plates. I also previously picked up some relatively inexpensive turn...
Forum: Organized Drag Racing and Autocross
07-02-2023, 04:05 PM
Replies: 171
Views: 9,942
Posted By raptere

Re: (Not So) Bare Minimum to Give Autox or Track Racing a Shot?

I received my new torque converter, and it looks nice! 9.5" 2600 stall, and he said he would set it up on the tighter side for me even below stall. And he included new bolts, which is nice!

NOW I...
Forum: Organized Drag Racing and Autocross
06-19-2023, 07:49 PM
Replies: 171
Views: 9,942
Posted By raptere

Re: (Not So) Bare Minimum to Give Autox or Track Racing a Shot?

On the tire topic I have literally been hearing since my first event last year that 200 tw tires are a must and will change the whole game... in retrospect I should have gone straight to them... I...
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