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Search took 0.18 seconds. Search: Posts Made By: Cliff R
Forum: Pontiac - Street Today, 05:40 AM
Replies: 11
Views: 292
Posted By Cliff R
Couple of things to mention. IF you install...

Couple of things to mention.

IF you install a new SI style alternator make sure that the battery is FULLY charged. If you don't it goes to full charge and works the piss out of the regulator and...
Forum: Pontiac - Street Today, 05:21 AM
Replies: 14
Views: 655
Posted By Cliff R
While we are on the subject of Q-jets and CFM...

While we are on the subject of Q-jets and CFM ratings, performance potential, etc, consider this. Below is a link to Brent Flynn's Firebird at the track. It's a pretty "basic" engine build, 408cid,...
Forum: Pontiac - Street Today, 05:08 AM
Replies: 14
Views: 655
Posted By Cliff R
The only big cfm early carburetors are the 1971...

The only big cfm early carburetors are the 1971 HO 455 units (and the 1971 400 4speed), 1971-74 Buick 455's and 1973-74 Super Duty.

All the non CCC front inlet carbs from 1975-up will be the...
Forum: Pontiac - Street Today, 05:08 AM
Replies: 14
Views: 655
Posted By Cliff R
The only big cfm early carburetors are the 1971...

The only big cfm early carburetors are the 1971 HO 455 units (and the 1971 400 4speed), 1971-74 Buick 455's and 1973-74 Super Duty.

All the non CCC front inlet carbs from 1975-up will be the...
Forum: Pontiac - Street Today, 04:54 AM
Replies: 8
Views: 219
Posted By Cliff R
They are difficult to remove without damaging...

They are difficult to remove without damaging them.

Replacements are available but they are not OEM quality, so I don't stock them. If and when I've needed to replace them I'll remove the bottom...
Forum: Pontiac - Street 06-11-2024, 07:31 AM
Replies: 14
Views: 655
Posted By Cliff R
Good thing I didn't give them a 1976 or later...

Good thing I didn't give them a 1976 or later Olds Q-jet for the testing or they would have been dialing 911 for old Tony!

The unit they used was a 1970-74 style Olds Q-jet. They aren't that...
Forum: Pontiac - Race 06-09-2024, 08:14 AM
Replies: 22
Views: 872
Posted By Cliff R
When you look at what a valve spring has to do...

When you look at what a valve spring has to do it's AMAZING any of that works at all!

Weight in the valve train is NOT your friend, but it goes far beyond just the springs and retainers. You have...
Forum: Pontiac - Street 06-09-2024, 07:16 AM
Replies: 15
Views: 658
Posted By Cliff R
Squish distance should be around .035-.039". I...

Squish distance should be around .035-.039". I woln't put one of these engines together with over .040" squish for any reason. For most I'll just zero deck and use a .039" Felpro head gasket. I've...
Forum: Pontiac - Street 06-08-2024, 07:12 AM
Replies: 15
Views: 658
Posted By Cliff R
As mentioned poor cam choice. I wouldn't use an...

As mentioned poor cam choice. I wouldn't use an XE cam in anything, even the larger ones. That technology just isn't the right choice for Pontiac engine builds right to start with. Not enough seat...
Forum: Pontiac - Street 06-05-2024, 09:37 AM
Replies: 8
Views: 557
Posted By Cliff R
For sure it acts very "mild" in a 455 HO or Super...

For sure it acts very "mild" in a 455 HO or Super Duty build. It's the smallest HR cam I'd even look at for one of those engines, even at or close to the "low" stock compression........
Forum: Pontiac - Street 06-05-2024, 07:21 AM
Replies: 8
Views: 557
Posted By Cliff R
Below is a cam card and dyno runs of a pretty...

Below is a cam card and dyno runs of a pretty "basic" 455 Super Duty build I did here. The engine was pretty "stock" aside from some minor head porting from an earlier ill-fated engine build. ...
Forum: Pontiac - Street 06-04-2024, 01:52 PM
Replies: 8
Views: 557
Posted By Cliff R
It's just a lot easier to forget about using the...

It's just a lot easier to forget about using the original distributor gear and also no need whatsoever to run an 80psi oil pump in one.

I've built a good many 455 HO and Super Duty engines. They...
Forum: Pontiac - Street 06-04-2024, 06:07 AM
Replies: 30
Views: 1,235
Posted By Cliff R
This has been said thousands of times I'm sure....

This has been said thousands of times I'm sure. But, NEVER EVER EVER waste your time trying to get aftermarket HEI advance weights and cams to work! Tried many years ago. Moroso, Mr. Gasket, etc....
Forum: Pontiac - Street 06-03-2024, 08:33 AM
Replies: 30
Views: 1,235
Posted By Cliff R
"Not an option as in it is a must do?" Yes,...

"Not an option as in it is a must do?"

Yes, HEI's are designed to stop the mechanical advance when the "flats" on the weights reach the "flats" on the center cam. The factory springs are strong...
Forum: Pontiac - Street 06-02-2024, 02:47 PM
Replies: 30
Views: 1,235
Posted By Cliff R
You cannot do this with an HEI, unless it’s been...

You cannot do this with an HEI, unless it’s been modified for a positive stop,

+2

I'll also add that welding or making a positive stop for an HEI is NOT an option. They are designed to stop...
Forum: Pontiac - Street 05-26-2024, 07:37 AM
Replies: 2
Views: 233
Posted By Cliff R
Accumulators are used to soften and/or delay the...

Accumulators are used to soften and/or delay the shift slightly. They are in route with the fluid path to the apply piston in a clutch drum or to a servo that applies a band.

The factory was...
Forum: Pontiac - Street 05-25-2024, 08:02 AM
Replies: 22
Views: 869
Posted By Cliff R
Find a better block and wear a condom if you go...

Find a better block and wear a condom if you go to Thailand!......Also make sure to take some Sevin dust with you on that adventure....LOL

Seriously, I would NOT for any reason use a 557 block. ...
Forum: Pontiac - Street 05-23-2024, 06:01 AM
Replies: 11
Views: 537
Posted By Cliff R
Comp grinds everything in their arsenal on a...

Comp grinds everything in their arsenal on a tight LSA. That NEVER works out well until you start getting into some of their grinds with a lot of seat timing and even then there are a LOT better...
Forum: Pontiac - Street 05-22-2024, 04:22 AM
Replies: 34
Views: 1,998
Posted By Cliff R
At least 10 to 1, wouldn't hurt my feelings if it...

At least 10 to 1, wouldn't hurt my feelings if it came out a little higher.

My own 455 with 6X-4 heads was right at 9.97 to 1 and EASILY managed pump gas, even 89 octane and never grumbled much....
Forum: Pontiac - Street 05-19-2024, 08:12 AM
Replies: 15
Views: 871
Posted By Cliff R
I used SD's Old Faithful cam 236/245/112 in my...

I used SD's Old Faithful cam 236/245/112 in my last 455 at 11.3 to 1 compression. It was pretty "tame" at idle making 13.5" vacuum at 750rpm's with only 10 degrees initial timing. Fine on pump gas...
Forum: Pontiac - Street 05-19-2024, 08:01 AM
Replies: 34
Views: 1,998
Posted By Cliff R
The "old" version of the 60919 cam is a SPC-8...

The "old" version of the 60919 cam is a SPC-8 from CMC. Crower simply "juggled" the numbers to make it look like their own cam.

Tey were NOT on a 112LSA, nor were they shorter seat timing.
...
Forum: THE LOBBY 05-19-2024, 07:37 AM
Replies: 21
Views: 1,278
Posted By Cliff R
I need to start checking that box for sure. ...

I need to start checking that box for sure.

Had another customer recently bellyache about a needle/seat assembly I sold them. Said that it had too many threads on it and wouldn't set into his...
Forum: Pontiac - Street 05-17-2024, 08:19 AM
Replies: 3
Views: 386
Posted By Cliff R
Since I do this for a living I'll say right up...

Since I do this for a living I'll say right up front that stock points units are very well set-up right off the bench for the applications they were intended to be used on. Not trying to question...
Forum: Pontiac - Street 05-17-2024, 07:57 AM
Replies: 87
Views: 3,305
Posted By Cliff R
Snake oil or not I use Lucas oil additive and...

Snake oil or not I use Lucas oil additive and their fuel treatment and will continue to do so. I don't know jack crap about how well the oil additive works, but for sure the fuel additive improves...
Forum: Pontiac - Street 05-17-2024, 07:23 AM
Replies: 20
Views: 683
Posted By Cliff R
If you install 72cc heads the compression ratio...

If you install 72cc heads the compression ratio goes from about 7.5/7.7 to 1 up to at least 10 to 1. That is a HUGE increase in static compression and with that tiny little XE262 cam dynamic...
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