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Forum: Pontiac - Street 03-28-2016, 01:29 PM
Replies: 276
Views: 17,955
Posted By 67GTO4SPEED
A "stock" OF cam has 72.50 degrees overlap, but...

A "stock" OF cam has 72.50 degrees overlap, but Dave recommends a OF cam with a 114 LSA (68.50 degrees) with RA manifolds. These generally idle with 14 - 16" of vacuum and make great power...
Forum: Pontiac - Street 03-28-2016, 12:37 PM
Replies: 276
Views: 17,955
Posted By 67GTO4SPEED
X2 I'm curious what your thoughts on this...

X2

I'm curious what your thoughts on this is as well, because the general consensus is that a lot of overlap and manifolds costs a lot of power.
Forum: Pontiac - Street 03-28-2016, 10:16 AM
Replies: 276
Views: 17,955
Posted By 67GTO4SPEED
I'll have pistons made to match the cam. IOW,...

I'll have pistons made to match the cam. IOW, I'll let my cam grinder tell me what the CR should be. On the TKO, I'll be going with a .82 OD, unless I upgrade to a better rear end with lower gears. ...
Forum: Pontiac - Street 03-27-2016, 08:38 PM
Replies: 276
Views: 17,955
Posted By 67GTO4SPEED
While I agree with everything you say here, the...

While I agree with everything you say here, the fact is a lot of well known builders and cam manufacturers recommend these smaller cams. When I started building my engine, Comp themselves recommended...
Forum: Pontiac - Street 03-25-2016, 01:20 PM
Replies: 276
Views: 17,955
Posted By 67GTO4SPEED
Well yeah, Fords are boring anyway! 😜😉 ...

Well yeah, Fords are boring anyway! 😜😉



I really appreciate the offer, but my car is quite a bit away from being finished. (It is in paint jail at the moment). It would sit on a stand for a...
Forum: Pontiac - Street 03-25-2016, 01:01 PM
Replies: 276
Views: 17,955
Posted By 67GTO4SPEED
I'll make you deal then. If you can prove to me...

I'll make you deal then. If you can prove to me you can come up with a camshaft that will out perform the OF cam I'm planning on buying in an engine similar to mine, I'll buy one from you.
Forum: Pontiac - Street 03-25-2016, 12:58 PM
Replies: 276
Views: 17,955
Posted By 67GTO4SPEED
One other thing on this - a few times now you've...

One other thing on this - a few times now you've made the comment to me to read up or educate myself about camshafts. That's exactly what I'm doing. In fact, I'll guarantee you I've spent more hours...
Forum: Pontiac - Street 03-25-2016, 12:36 PM
Replies: 276
Views: 17,955
Posted By 67GTO4SPEED
Fair enough, but until somebody figures what that...

Fair enough, but until somebody figures what that combination is, my money is going to ones that have been proven they will achieve what I want. Fair enough?
Forum: Pontiac - Street 03-25-2016, 12:24 PM
Replies: 276
Views: 17,955
Posted By 67GTO4SPEED
I don't know. As much as people try to generalize...

I don't know. As much as people try to generalize that brand doesn't matter and have the "engines are just an air pump" mentality, the 455 Pontiac really is an odd beast. We are talking an engine...
Forum: Pontiac - Street 03-25-2016, 09:26 AM
Replies: 276
Views: 17,955
Posted By 67GTO4SPEED
I totally agree with that. That's not what this...

I totally agree with that. That's not what this thread is talking about though. This started about a 455 SD build that was expected to have mild manners and produce at least 450 hp.

No one has...
Forum: Pontiac - Street 03-25-2016, 08:57 AM
Replies: 276
Views: 17,955
Posted By 67GTO4SPEED
The point is that can run more duration and...

The point is that can run more duration and higher than the recommended hard iron head limit of 9.5 : 1 CR when you run a cam with a wider a LSA. You seem to hung up on proving that just that LSA on...
Forum: Pontiac - Street 03-25-2016, 08:48 AM
Replies: 276
Views: 17,955
Posted By 67GTO4SPEED
That car sounded like a race car and left at...

That car sounded like a race car and left at what, 4000 RPM? I've had Cars like that, but my GTO will not be. Even if my D-ports flowed 370 cfm, I wouldn't be OK with a car that sounds like that. My...
Forum: Pontiac - Street 03-24-2016, 10:59 PM
Replies: 276
Views: 17,955
Posted By 67GTO4SPEED
So all I need is a 244/248 .050" 650/620 lift 107...

So all I need is a 244/248 .050" 650/620 lift 107 LSA cam to run 9's with my iron D-ports, intake, and Q-jet??? Cool! :p
Forum: Pontiac - Street 03-24-2016, 09:44 PM
Replies: 276
Views: 17,955
Posted By 67GTO4SPEED
I agree! That kind testing should also include...

I agree! That kind testing should also include the affects of manifolds, idle rpm, and vacuum to be a real world comparison, IMO. It's lost on some people that the amount of power yielded is only...
Forum: Pontiac - Street 03-24-2016, 09:31 PM
Replies: 276
Views: 17,955
Posted By 67GTO4SPEED
From the outside looking in, this is much of the...

From the outside looking in, this is much of the same bantering about that has gone on for years with no real resolution. Cliff and SD Performance contend that wider LSA's work better for milder,...
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