Performer RPM mis match

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Performer RPM mis match

Post  IDT-572 on August 19th 2013, 9:03 am

Here are pictures of a performer RPM intake and head for an FE.

Huge miss match.............. Second picture is after port matching.

The intake ports before porting matched a stock re-builder 302 intake gasket perfectly. Very small.

You would think a performer RPM would match.





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Re: Performer RPM mis match

Post  dfree383 on August 19th 2013, 9:06 am

There are a couple of different std ports on the FE's, I'm guessing they are aiming in the middle for the opening.
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Re: Performer RPM mis match

Post  rmcomprandy on August 19th 2013, 9:23 am

dfree383 wrote:There are a couple of different std ports on the FE's, I'm guessing they are aiming in the middle for the opening.
YES ... those manifold ports are "medium riser" height and "D2TE truck" size and will fit all the FE heads ... better to small than to big.
That manifold actually works quite well "out of the box"; (not that it can't work better).


Last edited by rmcomprandy on August 19th 2013, 6:15 pm; edited 1 time in total (Reason for editing : spelling)

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Re: Performer RPM mis match

Post  IDT-572 on August 19th 2013, 10:15 am

rmcomprandy wrote:
dfree383 wrote:There are a couple of different std ports on the FE's, I'm guessing they are aiming in the middle for the opening.
YES ... those manifold ports are "medium riser" and "D2TE truck" size and will fit all the FE heads ... better to small than to big.
That manifold actually works quite well "out of the box"; (not that it can't work better).
I wouldn't call it middle of the road, when the ports are 302 size, I took out over .200 on the width and over .100 at the roof, It was like porting a set of heads.

Maybe it was made to fit the smallest, there for you can port to fit all the FE heads. What was the smallest FE a 331 cubic inch? Probably would fit well on it.
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Re: Performer RPM mis match

Post  Lem Evans on August 19th 2013, 10:45 am

332

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Re: Performer RPM mis match

Post  richter69 on August 19th 2013, 11:05 am

651
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Re: Performer RPM mis match

Post  bbf-falcon on August 19th 2013, 11:15 am

richter69 wrote:651
Laughing Laughing  Jon,you might be a ASShole,but I must say,you do have a sense of humor.Razz cheers 

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Re: Performer RPM mis match

Post  Lem Evans on August 19th 2013, 12:08 pm

Humorhole or ass sense ?

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Re: Performer RPM mis match

Post  rmcomprandy on August 19th 2013, 6:24 pm

IDT-572 wrote:

Maybe it was made to fit the smallest, there for you can port to fit all the FE heads.  What was the smallest FE a 331 cubic inch? Probably would fit well on it.
Because the intake port is so very short and the pushrods pass through the intake manifold, that is essentially the smallest cross-section, like a "pushrod pinch" in a normal wedge head.
The D2TE head has about the smallest area intake port.

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Re: Performer RPM mis match

Post  bluef100fe on August 22nd 2013, 12:41 pm

Fe stuff is always a lot of work... lol. Randy is correct though that manifold does seem to work very well out of the box. I have a ported version and a unported one and I didn't realize how small they are... I just try not make the runners hour glass shaped... what ya building? hope it all works out for ya blake.
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Re: Performer RPM mis match

Post  IDT-572 on August 22nd 2013, 12:53 pm

It's a 10:1 428 .030 over. Going in a 69 notch mustang with a top loader. Main oil ports were almost completely covered over with the main bearing, head gaskets water ports all mis matched. I fixed all that.

It has been a pain in the butt. I also enlarged the oil gallery from the pump mounting flat through the block down to the oil filter adapter. It was barely .3125 dia very small and had sharp edges in the transition area.

I enlarged it to .4375 and smoothed the entire length. Main clearance is @ .002 on the mains, It is a street deal with a HV oil pump and a good pan. Should be a fun ride. Trying to decide on the cam. He wants a hyd flat tappet, thinking something around a 246 253 on a 108 .602 .613

What you thing about that? Its a close ratio, I may carry the sep out more
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Re: Performer RPM mis match

Post  dfree383 on August 22nd 2013, 1:19 pm

I'd put a little less cam for a street ride, maybe 6-8 degrees less.
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Re: Performer RPM mis match

Post  bluef100fe on August 22nd 2013, 3:39 pm

Blake you might run into valve control/lifter issues with that big of a hydraulic cam in an Fe. Normally I go solid Flat tappet and more spring pressure on the seat for anything Fe that wants to run over 5500 rpm. Valves/valvetrain etc I think are just too heavy for the hydraulic lifter to stay in control. Id either go a little smaller/ less aggressive hydraulic or convince the owner to go solid flat tappet. The cam you got specified should want to be shifted around 6000ish rpm with what ya got there for parts. Sounds like you got the block oiling under control also. I usually don't monkey with the main feed holes/ bearings. I do drill/port/blend the oil pump to block adapter passage and the adapter itself... also radius the block where the oil filter adapter attaches. Its a bunch of work but sure keeps the bearings happy. Hope my rambling helps a little Smile take care buddy
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Re: Performer RPM mis match

Post  IDT-572 on August 22nd 2013, 3:40 pm

Thanks Guys.............. Very Happy 
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Re: Performer RPM mis match

Post  richter69 on August 22nd 2013, 3:47 pm

your welcome..........Wink 
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Re: Performer RPM mis match

Post  Lem Evans on August 22nd 2013, 4:20 pm

richter69 wrote:your welcome..........Wink 
X2

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Re: Performer RPM mis match

Post  jasonf on August 22nd 2013, 7:19 pm

Man you are still working on that thing. I was there a month ago and you were getting ready to put it together. Laughing 
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Re: Performer RPM mis match

Post  IDT-572 on August 22nd 2013, 10:19 pm

jasonf wrote:Man you are still working on that thing. I was there a month ago and you were getting ready to put it together. Laughing 


Rolling Eyes 
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Re: Performer RPM mis match

Post  dfree383 on August 23rd 2013, 12:34 am

great things take time.
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Re: Performer RPM mis match

Post  richter69 on August 23rd 2013, 8:12 am

Grandma was slow........ but she was old.......
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Re: Performer RPM mis match

Post  IDT-572 on August 23rd 2013, 9:32 am

richter69 wrote:Grandma was slow........ but she was old.......
Go get you some turtle wax and polish that brown turtle head your so proud of..................Razz Razz 
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FE main bearing clearance

Post  68galaxie on August 27th 2013, 12:56 pm

0.002" is way too tight for main bearing clearance even on a street FE. A performance build should be 0.003".
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Re: Performer RPM mis match

Post  rmcomprandy on August 27th 2013, 3:39 pm

68galaxie wrote:0.002" is way too tight for main bearing clearance even on a street FE. A performance build should be 0.003".
I think you need to educate yourself about today's much better thinner oils.
You are preaching 25 year old technology.

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Re: Performer RPM mis match

Post  IDT-572 on August 27th 2013, 3:40 pm

rmcomprandy wrote:
68galaxie wrote:0.002" is way too tight for main bearing clearance even on a street FE. A performance build should be 0.003".
I think you need to educate yourself about today's much better thinner oils.
You are preaching 25 year old technology.
It is not a three inch main either.
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Re: Performer RPM mis match

Post  68galaxie on August 27th 2013, 4:31 pm

Good luck with the 0.002 clearances!
I don't run 20 50W oil anymore either - don't underestimate my education level either.
I didn't insult you!
Why do you answer with such a negative attitude?


Cheers
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