[max 93]

Does anyone know the intake port dimensions for the 295 kre heads ported by Sd Performance? I’m wondering how much of a difference there is in port size compared to a Torker2 intake. Is it worthwhile to have the intake port matched to these heads?

[ta man]

There is a port size difference. For an average street car one would never know the difference.
Just depends on goals. That being said SD matched my intake runners to the heads with a seamless transition since I'm the type of guy that likes "checking all the boxes" to gain half a tenth here and there.

[Steve C.]

SD Performance states their KRE 295cfm heads require Felpro intake gasket # 1233 or equivalent. The 1233 gasket is about 1.180" x 2.200". The as cast port exit dimensions for the Torker II intake is reported to be 1.030" x 2.030".

The answer is yes in my opinion. Some will disagree.

https://forums.maxperformanceinc.com...ight=flow+path

http://www.arkansaspontiacs.org/tech...asketmatch.pdf



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[lust4speed]

Might be good to point out that not all manifolds are that well cast and many of them have casting flash reducing port size considerably from the stated dimensions. Seems rather a shame to pay for head porting and then bolt down a manifold with restricted runners. Here's an example of how many of the iron manifolds are going to line up with a standard sized FelPro gasket. It's a ridiculous mismatch if the head runners have been matched to a RAIV gasket like the 1233.

[ta man]

I thought I had a before and after of the intake ports but I don't. There is a lot of meat left on the intake after the 1233 port match ,mine have been further opened up since this photo.

[max 93]

By looking at those pics I think I should have it done. Does it make a difference that this is the Torker 2 efi? It is part of Edelbrock pro flo 4 port fuel injection kit , the intake will only be carrying air and no fuel.

[ta man]

Originally Posted by max 93

By looking at those pics I think I should have it done. Does it make a difference that this is the Torker 2 efi? It is part of Edelbrock pro flo 4 port fuel injection kit , the intake will only be carrying air and no fuel.

At the time I had porting and plenum work done..my car was running 11.40's 119 with a stock torker 2 and went to 11.30's 120.5..maybe slightly quicker..so not a huge difference..but was needed for future potential performance.

[lust4speed]

Here's a stock Torker II with the FelPro 1233 gasket in place.

This manifold really didn't have much casting flash, but there is a lot of volume that can be picked up with a port match. Probably wouldn't feel a difference at anything under 4,500 RPM or so.

[steve25]

My people seem to have dreamed up logic to justify them spending 1700 or more bucks on slapping on a set of high flow big port aftermarket heads and then choking them off by not running enough valve lift to make real good use of them, and doing themselves a further injustice by dropping on a tripower set up which then not only chokes things off more, but narrows up on the motors power band a lot!

Here's a example of how to do yourself a disservice and narrow up on your motors power band.
Port matching the Manifold to the head and not having the matched area in the Intake runner sustained and ideally expanding on its way to the Plenum will guarantee you a loss in both top end and bottom end power!

Here's a example .

[slowbird]

Originally Posted by steve25

My people seem to have dreamed up logic to justify them spending 1700 or more bucks on slapping on a set of high flow big port aftermarket heads and then choking them off by not running enough valve lift to make real good use of them, and doing themselves a further injustice by dropping on a tripower set up which then not only chokes things off more, but narrows up on the motors power band a lot!

Here's a example of how to do yourself a disservice and narrow up on your motors power band.
Port matching the Manifold to the head and not having the matched area in the Intake runner sustained and ideally expanding on its way to the Plenum will guarantee you a loss in both top end and bottom end power!

Here's a example .

So far our tri-power testing has out performed a Performer, T2, RPM, HO, and T1 intakes.

[steve25]

Can you post up those Dyno test results and or strip time slips for us all to review?

[slowbird]

Originally Posted by steve25

Can you post up those Dyno test results and or strip time slips for us all to review?

The testing has been going on for 30yrs. Multiple engines, multiple cars (most of the testing has been done on low 11sec and slow cars), every time the tri-power was faster. My dad is very good at tuning a tri-power so results may vary, this just our experience.

[Steve C.]

" the intake will only be carrying air and no fuel."

That is a different ballgame !

Search the subject in general. Here is a start that might be of interest, and keep in mind in the research/reading you will will be limited in resources /design of the intake. Example some mentioned here are not applicable.


https://www.cartechbooks.com/techtip...mpactmanifolds

Carbureted and throttle-body fuel systems are considered wet flow. Port EFI designs (an individual injector for each cylinder) are referred to as dry flow. In a wet-flow system, a mixture of air and fuel coarses through the intake-manifold runners; in port systems, the fuel is administered at the end of the intake-manifold runner just prior to entry into the cylinder head.Typically air flow velocity is greater with no fuel droplets involved. At least that's my understanding. But is there less importance for a smooth transition between manifold and intake ports with dry air flow involving fuel injection ? I suspect a big mis-match would, but I'm not positive. I personally I would want to clean the edges up and make sure that the parts are all fitting nicely together without creating any unnecessary turbulence or restrictions to the airflow.



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[Steve C.]

"Prep and Tuning for Power: Optimum cylinder head port opening size should be as close as possible to the size of the gasket being used. Port-match the manifold exits .020" per side smaller than either the gasket being used or the cylinder head port opening, whichever is smaller."

Edelbrock Torker II Intake Manifold 50565

That statement is from the INSTALLATION INSTRUCTIONS listed under manifold P/N 50565 on the Edelbrock web site.

But note there is some confusion on the site regarding the name of the intake and part numbers on the installation sheet.

https://www.edelbrock.com/edelbrock-...esource-center


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