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Search took 0.00 seconds. Search: Posts Made By: Cliff R
Forum: Pontiac - Street 04-10-2016, 12:13 PM
Replies: 276
Views: 17,956
Posted By Cliff R
Agreed Skip, but it was NOT my engine, and there...

Agreed Skip, but it was NOT my engine, and there was no need to spend more of the customers money since we were not going to do any additional port work anyhow.

IF they were mine, we would have...
Forum: Pontiac - Street 04-10-2016, 06:18 AM
Replies: 276
Views: 17,956
Posted By Cliff R
"Cliff, Awesome!!! With 8.8:1 compression that is...

"Cliff, Awesome!!! With 8.8:1 compression that is amazing. Congrates on straightening the SD out and making it as powerful as it should be."

Thanks Dennis. For sure Pontiac didn't but nearly...
Forum: Pontiac - Street 04-10-2016, 06:13 AM
Replies: 276
Views: 17,956
Posted By Cliff R
"Cliff my point was not getting more flow for...

"Cliff my point was not getting more flow for more HP, just making sure the original porter had not made it worse or created some turbulence at a specific lift-easy to do on pontiac iron heads!"
...
Forum: Pontiac - Street 04-09-2016, 10:02 PM
Replies: 276
Views: 17,956
Posted By Cliff R
The Super Duty heads in stock form are PLENTY for...

The Super Duty heads in stock form are PLENTY for the power level we were looking for Skip. I've done several of these and a couple of HO 455's and they do NOT need any help in the heads for...
Forum: Pontiac - Street 04-09-2016, 09:58 PM
Replies: 276
Views: 17,956
Posted By Cliff R
I have no doubt we could have put some high test...

I have no doubt we could have put some high test in it and cranked the timing up, then chased to power some more. NOT the goal here, just wanted a solid build on this engine and stayed conservative...
Forum: Pontiac - Street 04-09-2016, 02:41 PM
Replies: 276
Views: 17,956
Posted By Cliff R
I actually believe that the head porting done...

I actually believe that the head porting done prior to us getting this build hurt the torque curve rather than helped it. They probably accounted for a few more ponies for peak HP, but with the cam...
Forum: Pontiac - Street 04-08-2016, 11:19 PM
Replies: 276
Views: 17,956
Posted By Cliff R
Thanks guys, the dyno test went very well, best...

Thanks guys, the dyno test went very well, best part it didn't leak a single drop of oil anyplace, and had excellent oil pressure throughout the pulls, no unusual noises, etc.

We used a set of...
Forum: Pontiac - Street 04-08-2016, 05:37 PM
Replies: 276
Views: 17,956
Posted By Cliff R
Dyno day today. All went well, the guys at KRE...

Dyno day today. All went well, the guys at KRE had the big 455 Super Duty bolted down and running it in under an hour.

We made a "base-line" pull without doing any tuning and were nicely rewarded...
Forum: Pontiac - Street 03-28-2016, 09:28 PM
Replies: 276
Views: 17,956
Posted By Cliff R
Don't know yet, looks like next week, trying to...

Don't know yet, looks like next week, trying to get together with the owner so he can be there for the testing......Cliff
Forum: Pontiac - Street 03-28-2016, 04:50 PM
Replies: 276
Views: 17,956
Posted By Cliff R
The 455 Super Duty is now turn key and ready for...

The 455 Super Duty is now turn key and ready for the dyno. We primed it with oil about an hour ago, and bolted down the intake.

We ran into a few minor issues, one was the valley pan being...
Forum: Pontiac - Street 03-28-2016, 04:43 PM
Replies: 276
Views: 17,956
Posted By Cliff R
Thanks Jim, good to see you posting these...

Thanks Jim, good to see you posting these days!.....Cliff
Forum: Pontiac - Street 03-28-2016, 10:16 AM
Replies: 276
Views: 17,956
Posted By Cliff R
Bummer, looks like it's going to be many months...

Bummer, looks like it's going to be many months if not years before we see any direct testing with custom ground tight LSA cams in one of these engines.

I LOVE to have others do the testing for...
Forum: Pontiac - Street 03-28-2016, 09:28 AM
Replies: 276
Views: 17,956
Posted By Cliff R
Good, then I'm anxiously awaiting the next post...

Good, then I'm anxiously awaiting the next post you put up here with dyno sheets on a 455 street engine with well prepared iron heads, dual plane intake, factory carb/distributor, at or below the...
Forum: Pontiac - Street 03-28-2016, 08:30 AM
Replies: 276
Views: 17,956
Posted By Cliff R
Sorry you've created some internal turmoil for...

Sorry you've created some internal turmoil for yourself. No need for all that, I've just been sharing information on the subject that we've learned with several decades now of DIRECT testing. I've...
Forum: Pontiac - Street 03-28-2016, 06:48 AM
Replies: 276
Views: 17,956
Posted By Cliff R
One thing to keep in mind here with this cam and...

One thing to keep in mind here with this cam and LSA topic is that a back to back dyno test will NOT tell the end user if the engine will successfully manage pump fuel. One is actually quite likely...
Forum: Pontiac - Street 03-27-2016, 07:11 PM
Replies: 276
Views: 17,956
Posted By Cliff R
We replaced the domed pistons with Ross flat tops...

We replaced the domed pistons with Ross flat tops on Eagle H beam rods, full floating.

I've been associated with one Super Duty and one HO 455 that used domed pistons in them to get the...
Forum: Pontiac - Street 03-27-2016, 04:24 PM
Replies: 276
Views: 17,956
Posted By Cliff R
"Do we figure out why the engine blew first?" ...

"Do we figure out why the engine blew first?"

The 455 Super Duty engine we're working on here seized two pistons, and the rest weren't too far behind them. They were older forgings and from what...
Forum: Pontiac - Street 03-27-2016, 02:45 PM
Replies: 276
Views: 17,956
Posted By Cliff R
"Showing dyno sheets of a grossly under spec'd...

"Showing dyno sheets of a grossly under spec'd cam then replacing it with an OF that's 10+ degrees larger, both seat and .050", "

The flat solid sports more .050" timing and probably more seat...
Forum: Pontiac - Street 03-27-2016, 12:06 PM
Replies: 276
Views: 17,956
Posted By Cliff R
Something to consider with the cams above is that...

Something to consider with the cams above is that the solid's advertised duration is at .015" , the HR most likely at .006". It's still a smaller cam even though it sports more .050" duration, and...
Forum: Pontiac - Street 03-27-2016, 08:37 AM
Replies: 276
Views: 17,956
Posted By Cliff R
OK, we'll stay off subject for a little longer. ...

OK, we'll stay off subject for a little longer.

For those who just tuned in, the cam card above was professionally chosen solid lifter replacement for the Old Faithful HR cam and was teamed up...
Forum: Pontiac - Street 03-27-2016, 06:25 AM
Replies: 276
Views: 17,956
Posted By Cliff R
Here ya go. It's not the best picture, but I...

Here ya go. It's not the best picture, but I found it......Cliff
Forum: Pontiac - Street 03-27-2016, 06:10 AM
Replies: 276
Views: 17,956
Posted By Cliff R
The LSA thing sure de-railed my thread. ...

The LSA thing sure de-railed my thread.

Really doesn't matter, at this point in my learning curve I certainly don't know everything, but at least I know quite a few things that do NOT work. Leaf...
Forum: Pontiac - Street 03-25-2016, 08:44 AM
Replies: 276
Views: 17,956
Posted By Cliff R
I'm not arguing with anyone, just posting...

I'm not arguing with anyone, just posting accurate information based on direct testing, and I'm not saying that only the LSA was the big player here. Just look at the dyno sheet and unless a guy is...
Forum: Pontiac - Street 03-25-2016, 06:26 AM
Replies: 276
Views: 17,956
Posted By Cliff R
Yikes, this thread started to sound like a ported...

Yikes, this thread started to sound like a ported vs manifold vacuum to the distributor vacuum advance deal!

What we do know here is that camshaft selection for the longer stroke and big CID...
Forum: Pontiac - Street 03-24-2016, 03:24 PM
Replies: 276
Views: 17,956
Posted By Cliff R
No doubt about it, runs well, MPH not showing big...

No doubt about it, runs well, MPH not showing big HP at 112mph but he's using every bit of power the engine's making to run that quick.

It's would also be pretty high compression. I've got dyno...
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