Home Menu

Menu


          
PY Online Forums - Bringing the Pontiac Hobby Together > Search Forums > Search Results
Page 1 of 9 1 23 Last »
Showing results 1 to 25 of 219
Search took 0.24 seconds. Search: Posts Made By: chiphead
Forum: Pontiac - Street 07-07-2026, 05:24 PM
Replies: 24
Views: 936
Posted By chiphead
Baldwin B39 for me. I bet they shrunk that...

Baldwin B39 for me.

I bet they shrunk that WIX filter to save cost and fit into tight engine bays. I'd still use it if I had to. Heck, look how small a filter for a LS is. Even the 5.7 Hemi...
Forum: Pontiac - Street 06-26-2026, 10:21 AM
Replies: 51
Views: 1,613
Posted By chiphead
With 98CC heads, I come up with 8:1 compression. ...

With 98CC heads, I come up with 8:1 compression.

What is the base timing and total timing? 16* base and 34-36 by 2500 should add some pep. What octane do you use? Try 87, it burns faster so...
Forum: Pontiac - Street 06-25-2026, 05:55 PM
Replies: 51
Views: 1,613
Posted By chiphead
I'm pretty sure the Gross and Net testing were...

I'm pretty sure the Gross and Net testing were both done on an engine dyno.

SAE standards J1349 and J2723 describe the Net test methods. The difference is the Net test procedure required the...
Forum: Pontiac - Street 06-18-2026, 03:53 PM
Replies: 20
Views: 928
Posted By chiphead
Very nice! What is the compression and...

Very nice!

What is the compression and head flow of the new combination?
Forum: Pontiac - Street 06-16-2026, 10:04 AM
Replies: 12
Views: 600
Posted By chiphead
The self-learning ECUs can fine-tune the fueling...

The self-learning ECUs can fine-tune the fueling but not the ignition timing. The user is expected to enter a baseline timing map and some other open-loop parameters. Then the ECU takes that and...
Forum: Pontiac - Street 06-10-2026, 04:46 PM
Replies: 19
Views: 574
Posted By chiphead
Is this a liquid-filled underhood gauge? Those...

Is this a liquid-filled underhood gauge? Those are not accurate at all when they get hot. The air bubble expands with heat and presses on the bourdon tube, which then reads lower than actual...
Forum: Pontiac - Street 06-09-2026, 12:30 PM
Replies: 13
Views: 416
Posted By chiphead
You order pistons AFTER the block has been...

You order pistons AFTER the block has been checked out.

1: You need the shop to tell you the rough overbore you'll need, The final hone to size is done AFTER pistons are in-hand and measured. ...
Forum: Pontiac - Street 06-01-2026, 11:06 AM
Replies: 7
Views: 286
Posted By chiphead
Just bought one, that's the new 550 HP version. ...

Just bought one, that's the new 550 HP version. I run it with 6AN line back to a stock type pickup. I had to install a deadhead regulator set to 5.5 PSI, as it was occasionally blowing through the...
Forum: Pontiac - Street 05-31-2026, 12:16 AM
Replies: 19
Views: 866
Posted By chiphead
If you've got some experience, it's possible to...

If you've got some experience, it's possible to estimate the idle vacuum for a particular combo. It comes down to static compression, engine size, intake tract design and camshaft specs.

A 400 at...
Forum: Pontiac - Street 05-31-2026, 12:02 AM
Replies: 19
Views: 866
Posted By chiphead
Power valve lore is one of those things that...

Power valve lore is one of those things that drive me nuts. The power valve can be open at idle and it won't affect anything. Yeah, I said it.

The fuel metering for idle and transition slot...
Forum: Pontiac - Street 05-29-2026, 01:19 PM
Replies: 31
Views: 1,118
Posted By chiphead
I bought a set of NOS hylift-johnson HFT lifters...

I bought a set of NOS hylift-johnson HFT lifters from ebay for about 90 bucks. I did have to clean the hardened shipping grease out. Otherwise they've been fine for about 1500 miles.

Whatever...
Forum: Pontiac - Street 05-27-2026, 01:35 PM
Replies: 31
Views: 1,118
Posted By chiphead
Aftermarket rods are worth the money for the...

Aftermarket rods are worth the money for the reliability they provide.

I also ran a XE274 in a 8.8:1 400. Idle quality was choppy, had noisy valvetrain with the fast ramps. Needs a lot of...
Forum: Pontiac - Street 05-26-2026, 01:16 PM
Replies: 31
Views: 1,118
Posted By chiphead
I run a Summit 2802 in a 400 with 62 heads. Its...

I run a Summit 2802 in a 400 with 62 heads. Its a beast. If the 2801 made 385 HP, I must be cracking 400. Idles about 900 RPM making 14" of vacuum. It does want at least a 2500 stall converter...
Forum: Pontiac - Street 05-18-2026, 11:48 PM
Replies: 13
Views: 581
Posted By chiphead
Wow, the stubstack. Haven't heard that in many...

Wow, the stubstack. Haven't heard that in many years. I'm sure it would have some influence, as this combo seems to be very sensitive to aircleaner/airfilter shape.

To be clear in my earlier...
Forum: Pontiac - Street 05-18-2026, 11:05 AM
Replies: 13
Views: 581
Posted By chiphead
Update.... Got the Allstar domed lid and curved...

Update.... Got the Allstar domed lid and curved bottom to fit with a 4" air filter. 1/4" open spacer below 4150 double pumper.

WOT AFR is now 12.1-12.5. With the 3.5" filter and sharp flat...
Forum: Pontiac - Street 05-13-2026, 11:20 AM
Replies: 10
Views: 446
Posted By chiphead
I don't know how much HP you're making, but...

I don't know how much HP you're making, but Jakeshoe had some thoughts about the TG kit and high HP. He recommended doing the internal dual-feed instead of the TG dual feed plate over 600HP. He...
Forum: Pontiac - Street 05-11-2026, 03:59 PM
Replies: 10
Views: 446
Posted By chiphead
The Pro kit is the most comprehensive street or...

The Pro kit is the most comprehensive street or strip kit. It retains automatic shifting and dual-feeds the direct clutch using a multi layer separator plate that routes fluid to both sides of the...
Forum: Pontiac - Street 04-29-2026, 02:17 PM
Replies: 24
Views: 833
Posted By chiphead
I'm running the real J20C from the local JD...

I'm running the real J20C from the local JD dealership. Even that stuff is cheaper than a case of Dex 3 from the auto parts store. I'm running it as an experiment, as I was planning on...
Forum: Pontiac - Street 04-22-2026, 12:48 PM
Replies: 78
Views: 4,385
Posted By chiphead
Yup, its HP level and durability, they go hand in...

Yup, its HP level and durability, they go hand in hand when using stock replacement type parts. A 9:1 400 will make decent power, and have a wide enough tuning window to find a tuning mistake...
Forum: Pontiac - Street 04-22-2026, 10:52 AM
Replies: 78
Views: 4,385
Posted By chiphead
If I had another $1500 to throw at it, I'd be...

If I had another $1500 to throw at it, I'd be changing those pistons and rods first. The shortblock is the heart of the whole project. The heads can be replaced later. The engine could be run...
Forum: Pontiac - Street 04-17-2026, 12:28 PM
Replies: 8
Views: 343
Posted By chiphead
The online reviews said the regulator brackets...

The online reviews said the regulator brackets hit the electric choke on holley carbs.

So I fabricated my own bracket. It mounts to the rear bolt of the thermostat housing. I used the same...
Forum: Pontiac - Street 04-14-2026, 03:58 PM
Replies: 78
Views: 4,385
Posted By chiphead
This. Not trying to upset the OP, but this whole...

This. Not trying to upset the OP, but this whole build sounds like a DGAF special. Somebody who doesn't know better would run this engine until he got tired of it. It's like a 2.8L V6, it'll run...
Forum: Pontiac - Street 04-14-2026, 10:57 AM
Replies: 78
Views: 4,385
Posted By chiphead
Yeah that's pig rich. That mixture, low air flow...

Yeah that's pig rich. That mixture, low air flow and low compression will yield inaccurate dyno numbers. As more experienced members said, the dyno cell setup looks suspect.
I'd go so far as to...
Forum: Pontiac - Street 04-13-2026, 12:39 PM
Replies: 24
Views: 833
Posted By chiphead
I use 4 quarts dex 3 for color and additives, the...

I use 4 quarts dex 3 for color and additives, the rest Hy-Gard John Deere transmission fluid because its cheap. The turbo racer guys swear by it on YB. There is a standard viscosity and low...
Forum: Pontiac - Street 04-13-2026, 10:01 AM
Replies: 78
Views: 4,385
Posted By chiphead
A 400 with 96 heads, .065 head gasket, typical...

A 400 with 96 heads, .065 head gasket, typical 6cc pistons .010 down in the hole is going to be about 7.94 compression. That's with good TRW forgings. Please tell me they didn't use the cast...
Showing results 1 to 25 of 219
Page 1 of 9 1 23 Last »

 
Forum Jump

All times are GMT -4. The time now is 01:41 PM.

 

About Us

The PY Online Forums is the largest online gathering of Pontiac enthusiasts anywhere in the world. Founded in 1991, it was also the first online forum for people to gather and talk about their Pontiacs. Since then, it has become the mecca of Pontiac technical data and knowledge that no other place can surpass.

 




Contact Us Home
Copyright © 2017