Port matching Edelbrock Exhausts

Ken_Parkman wrote: The Edelbrock exhaust has a quite small csa around the bend. In any case there is a massive expansion into the header so matching the flange without doing much more extensive porting is not necessary, and actually probably not a good idea. I'd not bother port matching.

X2

Head port outlet is smaller than the header and gasket?
If you are not racing, leave it alone.

I ordered ma cam! 

Howards .904 grind
 HM2283525a cut on a 108 lobe center with 4* advance (104 intake centerline)

.006  .020  .050  .200    lobe lift w/1.6:1
275* 252* 228* 148*  .3525  .564

Intake should close @61.5 ABDC giving me 7.41:1 Dynamic CR with 9:1 Static on the Edelbrock Heads
 and stock cereal bowl pistons with a (not recommended) stamped steel gasket

59* overlap will be 1* less than my current (crappy old) General Kinetics 288/222 on a 114.

I *really* wanted to have it cut on a 106* lobe center line/102 intake but I chickened out

^this is for a stock short block 401 + the Eddy heads, most likely an R4b
& Dougs 103 headers

Thoughts?

jcisworthy wrote: This is basically what I did

Thank you John,
a picture is worth a thousand words.
Very nice!

 I hope you don't mind me posting the pic you put up earlier to compare it to (even though it's a different port).

That kind of bowl work takes skill I don't have,
 but it's helpful to see even with all that work, you didn't need to expand the port itself very much at all.

When I check the port match on the intake I'll take a hard look at the exhaust again and see if I want to do a bit of cleanup, or leave it alone.

Thanks again sir

jpnjim wrote: I ordered ma cam!  Howards .904 grind  HM2283525a cut on a 108 lobe center with 4* advance (104 intake centerline) .006  .020  .050  .200    lobe lift w/1.6:1 275* 252* 228* 148*  .3525  .564 Intake should close @61.5 ABDC giving me 7.41:1 Dynamic CR with 9:1 Static on the Edelbrock Heads  and stock cereal bowl pistons with a (not recommended) stamped steel gasket 59* overlap will be 1* less than my current (crappy old) General Kinetics 288/222 on a 114. I *really* wanted to have it cut on a 106* lobe center line/102 intake but I chickened out ^this is for a stock short block 401 + the Eddy heads, most likely an R4b & Dougs 103 headers Thoughts?

Just wanted to bump this to say WOW Competition Products/Howards works FAST!

I called late in the afternoon last Tuesday,
 and have the custom cam in my greedy (not so little) little hands the following Wednesday

not bad for $130 (cam only)
http://www.competitionproducts.com/Howards-Cams-Hydraulic-Flat-Tappet-Cam-AMC-V8-290-401-Custom/productinfo/319991/

lobe list:
https://howardscams.com/rt-4932-downloads.html

jcisworthy wrote: I dont mind at all Jim. If I can help in any way contact me

Thanks John!
much appreciated

jcisworthy wrote: What are the lobes on that cam Jim?

Hi John,
 it's a Howards HM2283525a intake & exhaust cut on a 108 (104 intake CL)

FILE NAME   @0.006" @0.020" @.050" @.200" max lift   1.6000
HM2283525A   275       252         228       148      0.353    .5640

fast acting .904 lobe,
for a std bore, low cr piston 401 with the Eddy heads & D103 Headers

I want something to build power quick on the bottom end,
 and feel good shifting at 5500.

Decent idle & early closing intake won't hurt either.

It's for a 71' Javelin AMX, 4 speed.

A 2.64 first T-10 is going in at the same time, but it'll be in front of a 3.15 rear with 25.5" tall tires

(^tallish first gear= about the same as the old 2.23 T-10 w/3.91's & 27" tire combo I was running)

Thanks for looking