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Forum: Pontiac - Street Today, 11:38 AM
Replies: 47
Views: 2,771
Posted By JLMounce
I'm still doing the full build, so the money...

I'm still doing the full build, so the money isn't necessarily changing. Although, I'll be able to sell the cam. I know there's a couple people looking for stump puller type cams.

You're...
Forum: Pontiac - Street Today, 10:54 AM
Replies: 47
Views: 2,771
Posted By JLMounce
I don't know much of the engine's history. When...

I don't know much of the engine's history. When I purchased the car in 1998, the engine was claimed to be fresh at the time. The previous owner didn't furnish any receipts or documents related to...
Forum: Pontiac - Street Today, 10:46 AM
Replies: 4
Views: 173
Posted By JLMounce
I'm not an expert on these. But I believe that...

I'm not an expert on these. But I believe that you can not put a late sprag on an early drum. You would have to change the complete drum itself.

That said I don't believe at the power level we...
Forum: Pontiac - Street Yesterday, 10:45 PM
Replies: 47
Views: 2,771
Posted By JLMounce
Finally got a full weekend that I wasn’t busy, so...

Finally got a full weekend that I wasn’t busy, so I was able to get the engine out and disassembled.

I didn’t document much as I just wanted to get things done, but I’m left a little befuddled....
Forum: Pontiac - Street Yesterday, 10:22 PM
Replies: 4
Views: 173
Posted By JLMounce
You’ll need to figure out what year it is. The...

You’ll need to figure out what year it is. The very early models typically will need the internal harness upgraded.

I believe that is the case for 91-93 model transmissions.

A fully...
Forum: Pontiac - Street 06-21-2024, 09:25 PM
Replies: 9
Views: 322
Posted By JLMounce
Is there a reason you believe the cam needs to be...

Is there a reason you believe the cam needs to be replaced, or is this more of a piece of mind type situation?

With a hydraulic cam, I don't think I would necessarily measure from a valve spring. ...
Forum: Exhaust TECH 06-20-2024, 03:50 PM
Replies: 18
Views: 466
Posted By JLMounce
How much of a performance hit did you take? ...

How much of a performance hit did you take?

I'm building a much healthier engine currently and I'm currently running a 2.5" mandrel bent pypes system with the pypes mufflers replaced with...
Forum: Pontiac - Street 06-20-2024, 09:51 AM
Replies: 25
Views: 760
Posted By JLMounce
The sewing machine sound is likely your rockers. ...

The sewing machine sound is likely your rockers. That is normal for many full roller rockers. I had ticking lifters for years without issue, other than they were annoying.

I agree with Jay that...
Forum: Pontiac - Street 06-17-2024, 08:03 PM
Replies: 23
Views: 985
Posted By JLMounce
Thanks, this is good insight as well. My...

Thanks, this is good insight as well.

My engine is coming out and getting disassembled this weekend. Still need to start making some purchases.
Forum: Pontiac - Street 06-15-2024, 10:23 AM
Replies: 19
Views: 541
Posted By JLMounce
If you’re asking about the progression ignition,...

If you’re asking about the progression ignition, yes. It must be attached to manifold vacuum so its internal MAP sensor can function.
Forum: Pontiac - Street 06-14-2024, 11:16 PM
Replies: 19
Views: 541
Posted By JLMounce
You can't think about it in terms of boost retard...

You can't think about it in terms of boost retard with a system like the Progression ignition, or any type of table based ignition controller.

Instead, you'll build a spark map based on engine...
Forum: Pontiac - Street 06-14-2024, 11:04 AM
Replies: 23
Views: 985
Posted By JLMounce
Appreciate all this information Jay.

Appreciate all this information Jay.
Forum: Pontiac - Street 06-14-2024, 10:50 AM
Replies: 19
Views: 541
Posted By JLMounce
This was my original thought too. With what the...

This was my original thought too. With what the OP is needing, the Progression Ignition seems to fit the bill.
Forum: Pontiac - Street 06-13-2024, 01:55 PM
Replies: 20
Views: 565
Posted By JLMounce
Yeah as long as you have something like a...

Yeah as long as you have something like a shiftworks detent in the shifter, or a shifter designed for your 4 speed anyway, that's doable.

In the US shift programming you can actually set the...
Forum: Pontiac - Street 06-13-2024, 12:02 PM
Replies: 20
Views: 565
Posted By JLMounce
Autocross with an auto is not really a big deal. ...

Autocross with an auto is not really a big deal. Most cars are in 2nd for the whole run. Road courses are a different story of course.

And yes the US shift controller has the ability to store 4...
Forum: Pontiac - Street 06-13-2024, 09:44 AM
Replies: 23
Views: 985
Posted By JLMounce
Thanks Paul for the information. I am planning...

Thanks Paul for the information. I am planning on needing to change the pushrods. I'm moving to a different manufacturer lifter, so that will probably necessitate that change. Saving a bit by...
Forum: Pontiac - Street 06-12-2024, 07:01 PM
Replies: 23
Views: 985
Posted By JLMounce
Thank you. Yes I’m aware that the HS rockers tend...

Thank you. Yes I’m aware that the HS rockers tend to come in with slightly more ratio, likely to combat deflection of the aluminum body. As a result a package that doesn’t run as much spring pressure...
Forum: Pontiac - Street 06-12-2024, 05:51 PM
Replies: 11
Views: 445
Posted By JLMounce
My TruTrac has a very minimal amount of slop in...

My TruTrac has a very minimal amount of slop in it. I've never measured it, but you can feel it if you rotate the wheels back and forth with the car on jack-stands. You don't feel it in the car...
Forum: Pontiac - Street 06-12-2024, 05:28 PM
Replies: 23
Views: 985
Posted By JLMounce
Drive train is a 4l80e with a TSP converter that...

Drive train is a 4l80e with a TSP converter that stalled at 3200rpm behind my current engine. Triple disc clutch that gets full throttle lockup in 2nd through 4th gear. Rear gears are a 3.31 with a...
Forum: Pontiac - Street 06-12-2024, 04:52 PM
Replies: 23
Views: 985
Posted By JLMounce
I'd love to be in the 560-580 range. Most of the...

I'd love to be in the 560-580 range. Most of the money is going to have to be spent to rebuild my engine anyhow.

Block is going to be machined with upgrades in the rotating assembly. Heads are...
Forum: Pontiac - Street 06-12-2024, 04:23 PM
Replies: 40
Views: 937
Posted By JLMounce
I think you're plan sounds pretty good. I also...

I think you're plan sounds pretty good. I also think that you'd have to put a pretty small cam in that thing to be near 400 hp. With an as cast SM head and a SFT of any respectable size, you're...
Forum: Pontiac - Street 06-12-2024, 03:53 PM
Replies: 23
Views: 985
Posted By JLMounce
Higher Ratio Rocker vs. More Lobe Lift

I'd like to get everyone's opinion on this. As I'm looking at different cams for my engine build, I've already been given some various opinions on this. I don't know enough about what this does to...
Forum: Pontiac - Street 06-12-2024, 03:40 PM
Replies: 20
Views: 565
Posted By JLMounce
This is true. When I had my TH400, I had to...

This is true. When I had my TH400, I had to manually shift it, otherwise the shift came way too early. Once I got the 4l80e dialed in, I haven't needed to use the gear selector for anything other...
Forum: Pontiac - Street 06-10-2024, 12:46 PM
Replies: 20
Views: 565
Posted By JLMounce
It's certainly possible that it would. But not...

It's certainly possible that it would. But not knowing if there are any differences between the factory dual gate and the hurst, I wouldn't want to send you buying something that may not work.
...
Forum: Pontiac - Street 06-10-2024, 10:19 AM
Replies: 20
Views: 565
Posted By JLMounce
Most 3 speed shifters can work with the 4 speed. ...

Most 3 speed shifters can work with the 4 speed. However, you typically lose the ability to manually drop the transmission to 1st gear and some of the detents may be ever so slightly off.

If this...
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