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Search took 0.16 seconds. Search: Posts Made By: Cliff R
Forum: Pontiac - Street Today, 05:29 AM
Replies: 4
Views: 136
Posted By Cliff R
You pretty much answered the questions. IF it...

You pretty much answered the questions. IF it prefers ported vacuum for easier starting and less RPM drop when a load is placed on the engine then that's what it likes best.

As far as running...
Forum: Pontiac - Street Yesterday, 09:24 PM
Replies: 9
Views: 255
Posted By Cliff R
Cool. Both of these tests will tell us how...

Cool. Both of these tests will tell us how efficient the converter is.

Another very good test but more difficult is to do some track testing. 60' time? RPM at the finish line and what was the...
Forum: Pontiac - Street Yesterday, 06:03 PM
Replies: 9
Views: 255
Posted By Cliff R
Next time you have the car out disable the...

Next time you have the car out disable the downshift solenoid and drive the car till it reaches high gear, then coast along about 25-30mph. STUFF the throttle to the floor as hard as you can (leave...
Forum: Pontiac - Street Yesterday, 05:47 PM
Replies: 6
Views: 205
Posted By Cliff R
1969 #46's have the small valves and 45 degree...

1969 #46's have the small valves and 45 degree intake seats. They are "sleeper" heads. Without even touching the ports with a grinder or sanding roll we stuffed a set on a 455 shortblock when the...
Forum: Pontiac - Street 06-14-2024, 08:41 AM
Replies: 15
Views: 279
Posted By Cliff R
Skip's got it right, just add the fitting to...

Skip's got it right, just add the fitting to what you have now. I would open up the "slot" so you can move the attachment point up/down to nail down the best geometry. You will still have PLENTY...
Forum: Pontiac - Street 06-14-2024, 07:30 AM
Replies: 40
Views: 903
Posted By Cliff R
The failure rate for cast cranks at or above the...

The failure rate for cast cranks at or above the 700hp mark is 100 percent!

I tried to use them here WAY back when they first came out. At that time I was using one of the best crank grinders in...
Forum: Pontiac - Street 06-14-2024, 07:12 AM
Replies: 9
Views: 354
Posted By Cliff R
The reason I don't like the aftermarket ones from...

The reason I don't like the aftermarket ones from the suppliers is that the retainer washer is too thick, and the size of the discs is incorrect.

When I was still rebuilding and restoring carbs...
Forum: Pontiac - Street 06-14-2024, 07:08 AM
Replies: 12
Views: 409
Posted By Cliff R
I have had ZERO luck with anything...

I have had ZERO luck with anything "remanufactured" in China or any starters, alternators, carburetors, distributors, etc from China.

My best advice is to obtain an original SI alternator and...
Forum: Pontiac - Street 06-13-2024, 05:40 AM
Replies: 12
Views: 409
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 06-13-2024, 05:21 AM
Replies: 17
Views: 950
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 06-13-2024, 05:08 AM
Replies: 17
Views: 950
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 06-13-2024, 05:08 AM
Replies: 17
Views: 950
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 06-13-2024, 04:54 AM
Replies: 9
Views: 354
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: 17
Views: 950
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: 983
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: 16
Views: 833
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: 16
Views: 833
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: 583
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: 583
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: 583
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: 1,275
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: 1,275
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: 1,275
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: 256
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: 939
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. ...
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