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Forum: Pontiac - Street 01-21-2023, 07:10 PM
Replies: 39
Views: 3,585
Posted By chiphead
Nope I'm gonna run it unless somebody says it's a...

Nope I'm gonna run it unless somebody says it's a no-go.. It's a short term engine and I don't want to grind on good parts or spend $$$ to have the heads done right. I've got a 434 ready to go and...
Forum: Pontiac - Street 01-15-2023, 08:30 PM
Replies: 39
Views: 3,585
Posted By chiphead
It would likely take another .030 of preload to...

It would likely take another .030 of preload to make it hit. To be clear it's the underside of the rocker arm and the top side of the retainer. The OD of retainer to fulcrum clearance is fine. The...
Forum: Pontiac - Street 01-12-2023, 10:56 AM
Replies: 39
Views: 3,585
Posted By chiphead
Finally got this back together. With 9.250...

Finally got this back together. With 9.250 pushrods, the tightest retainer to rocker arm clearance is .038" with valve closed and .050" preload.

Is that too tight or run it?
Forum: Pontiac - Street 12-23-2022, 02:45 AM
Replies: 39
Views: 3,585
Posted By chiphead
So the 87048D-16 retainers gave me a IH of 1.685"...

So the 87048D-16 retainers gave me a IH of 1.685" and about .525" of valve travel before the retainer hits the seal. So shim it up and that's all good.

Next issue is that the stock rocker arm...
Forum: Pontiac - Street 12-21-2022, 09:17 AM
Replies: 39
Views: 3,585
Posted By chiphead
I agree with that chart. The car has a stall...

I agree with that chart. The car has a stall converter and 3.55s. It ran pretty well with the Crane 284, so the 2802 should do fine. Both are in the ballpark of the 744 so the chart holds.
This...
Forum: Pontiac - Street 12-17-2022, 11:43 AM
Replies: 39
Views: 3,585
Posted By chiphead
Here's the current view from the top and the...

Here's the current view from the top and the side, with checking springs installed. I've got .435" lift before the retainer hits the seal. With .488 cam lift, I need .538" for .050" running...
Forum: Pontiac - Street 12-17-2022, 05:26 AM
Replies: 39
Views: 3,585
Posted By chiphead
Did some more digging. Crower catalog...

Did some more digging.

Crower catalog recommends the 87048-16, 7 degree retainer with the 68404 spring. It says it adds about .087 to the IH, There is also the 87048D-16 retainer that gives .150...
Forum: Pontiac - Street 12-17-2022, 03:13 AM
Replies: 39
Views: 3,585
Posted By chiphead
OK got an issue. With the .488 lift of the 2802...

OK got an issue. With the .488 lift of the 2802 and the retainer/guide/viton seal stackup, I need an additional .100" of retainer-to-seal travel to achieve .050" of retainer to seal clearance at max...
Forum: Pontiac - Street 12-15-2022, 11:24 AM
Replies: 39
Views: 3,585
Posted By chiphead
A few more questions. What dizzy gear should...

A few more questions.
What dizzy gear should I run with the summit 2802? I've got std, bronze and bop polymer.

Do I need to disassemble the new lifters to clean them?

Do I need to remove...
Forum: Pontiac - Street 12-12-2022, 01:48 PM
Replies: 39
Views: 3,585
Posted By chiphead
So I got the #1 valvesprings off. The guides are...

So I got the #1 valvesprings off. The guides are machined for .500 positive seals. The retainers and locks look aftermarket and there was no O-ring present. The IH miked at 1.625 on the intake and...
Forum: Pontiac - Street 12-12-2022, 08:21 AM
Replies: 39
Views: 3,585
Posted By chiphead
That pretty much describes the 69 wz code 62...

That pretty much describes the 69 wz code 62 headed 400 I've got. I would expect it to pull 5300 RPM. This build s starting to show its age so I don't think I'd wing it up there that often.
Forum: Pontiac - Street 12-11-2022, 11:58 AM
Replies: 39
Views: 3,585
Posted By chiphead
Yeah I need to get this thing rolling. So it...

Yeah I need to get this thing rolling. So it looks like Crower's stuff is backordered.

Summit 2802 be the next best thing?

Duration at 050 inch Lift: 224 int./234 exh.
Advertised Intake...
Forum: Pontiac - Street 12-11-2022, 01:18 AM
Replies: 39
Views: 3,585
Posted By chiphead
So I got the cam out tonight. The #7 exhaust...

So I got the cam out tonight. The #7 exhaust lobe was scrubbing the lifter, it was indeed going flat. But I caught it early.

The cam is a Crane HIT-284-2NC from the late 1980s.

Adv. 284 -...
Forum: Pontiac - Street 12-09-2022, 01:16 AM
Replies: 39
Views: 3,585
Posted By chiphead
Thanks for the input. I'm going to have to do...

Thanks for the input. I'm going to have to do something, I just confirmed this cam is likely dead. The #8 intake lobe looks suspicious as anything. In addition to that, the upper valvetrain...
Forum: Pontiac - Street 12-08-2022, 04:22 PM
Replies: 39
Views: 3,585
Posted By chiphead
Thanks, that's a great tip on those valvesprings....

Thanks, that's a great tip on those valvesprings.

What do you guys think about the Summit 2802 in this application?
Forum: Pontiac - Street 12-07-2022, 02:21 PM
Replies: 39
Views: 3,585
Posted By chiphead
HFT recommendation for 62 heads?

I've got a '69 400 with 62 heads with a bad aftermarket cam. The 62s appear to have the stock upper valvetrain. What's the max lift I need to stay under, with stock length valves and guide heights?...
Showing results 1 to 16 of 16

 
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