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Search found 194 matches

by Mummert
Thu Apr 22, 2021 2:26 am
Forum: Engine Tech
Topic: Push Rod Oiling
Replies: 10
Views: 566

Re: Push Rod Oiling

Edge orifice lifter oiling is the way to control oil flow to the topend. For sure need oil to all pushrod tips or you can burn up pushrod ends or rocker fulcrums.
by Mummert
Fri Apr 16, 2021 4:03 am
Forum: Engine Tech
Topic: D0OE exhaust port
Replies: 30
Views: 1496

Re: D0OE exhaust port

Why does everyone always dogg the exhaust port in the SBF iron heads. With 2hrs worth of work they will be capable of making more HP than any thing the intake ports can do with a weeks worth of work. After working these heads on too many occasions the exhaust ports impress me more everytime. C5AE he...
by Mummert
Thu Apr 15, 2021 8:43 pm
Forum: Engine Tech
Topic: Big Type 4 VW
Replies: 23
Views: 1251

Re: Big Type 4 VW

One of the best things you can do to keep a type 4 alive is have the heads re seated with nickel bronze or beryllium copper seats. They are notorious for dropping seats. High performance air cooled engines need valve jobs on a regular basis, lots of seat insert movement. We used to cut Vw heads for ...
by Mummert
Thu Apr 15, 2021 3:31 am
Forum: Engine Tech
Topic: Big Type 4 VW
Replies: 23
Views: 1251

Re: Big Type 4 VW

I used to build a lot of type 1 volkswagens back in the day. Smaller 8mm stud chromoly material did better with big bore cylinders than oem 10 mm studs. Not because they were stronger but because they left more room in the case for better case savers. Aluminum studs would not be a good idea, the sec...
by Mummert
Wed Apr 07, 2021 6:42 pm
Forum: Engine Tech
Topic: Cam King
Replies: 19
Views: 3054

Re: Cam King

The first thing you should look at, is what is the MCSA for a certain engine at a certain RPM. Wallace racing has some good calculators. The numbers always look smaller than you think it should be. But figure that out first. Then you will have to look at your head and see where you can get close to ...
by Mummert
Tue Apr 06, 2021 6:36 pm
Forum: Engine Tech
Topic: D0OE exhaust port
Replies: 30
Views: 1496

Re: D0OE exhaust port

No, I'm Geoff Mummert in San Diego , no Facebook.
by Mummert
Thu Apr 01, 2021 1:58 am
Forum: Engine Tech
Topic: D0OE exhaust port
Replies: 30
Views: 1496

Re: D0OE exhaust port

Better exhaust ports don't need as much duration to run good. Some guys used to shape those bosses into super sexy guide veins, it doesnt have to be all or nothing. Those exhaust port can flow 180 cfm or better without big outlet size. You don't need that much cfm for your goal but I'd make it bette...
by Mummert
Fri Mar 19, 2021 6:02 pm
Forum: Engine Tech
Topic: Isky Supercams
Replies: 7
Views: 952

Re: Isky Supercams

The cam works good, the pressure they are recommending is probably just a one size fit all. So they don't have to stock a bunch of different springs for every different flat tappet they sell. 100 seat and 240 open will get you to 5500 no problem. Stock 5.0L mustang hydraulic roller which has similar...
by Mummert
Tue Mar 09, 2021 5:57 am
Forum: Engine Tech
Topic: Connecting rod reconditioning procedure
Replies: 26
Views: 1108

Re: Connecting rod reconditioning procedure

I've resized more 302 rods with ARP bolts than most in my younger days. Checking the way the rods come apart with the Oem bolts is the first place to start, if even one of the caps don't slide over the threads of the bolts perfectly, throw the whole set in the trash, 302 rods are cheap. The rods tha...
by Mummert
Thu Mar 04, 2021 1:50 am
Forum: Engine Tech
Topic: DI Engines: Air Velocity is Dead? Long Live Air Velocity!
Replies: 9
Views: 798

Re: DI Engines: Air Velocity is Dead? Long Live Air Velocity!

In the motorcycle world cylinder heads seem to change every couple of years, bigger port smaller ports back to big ports, bigger valves than the riders complain and they put smaller valves back in them, straight ports that can be mirrored in master cam, then the offset the ports trying to get moveme...
by Mummert
Wed Mar 03, 2021 7:26 pm
Forum: Vintage/Classic/Historical Engine Tech
Topic: Ford 289 Camshaft Manifold Carburetor
Replies: 26
Views: 1005

Re: Ford 289 Camshaft Manifold Carburetor

One thing worth mentioning is those cars have hood height problems. An HP body carb with a milled choke horn help power when you're air cleaner limited. You'll know the air cleaner is right when it just starts scracthing hood a little bit. 5068 would be my choice, but the original cam picked is so c...
by Mummert
Tue Mar 02, 2021 9:27 pm
Forum: Vintage/Classic/Historical Engine Tech
Topic: Ford 289 Camshaft Manifold Carburetor
Replies: 26
Views: 1005

Re: Ford 289 Camshaft Manifold Carburetor

Thank you all for your competent advice. @ Jack Also, good advice about the use of 8mm Valves, we will use them. Thank you Heinz IIRC, we were able to put 8mm/5/16" bronze guide liners in the existing 11/32" guides and not have to change the guides. jack vines If the guides are in very good conditi...
by Mummert
Tue Mar 02, 2021 3:55 pm
Forum: Vintage/Classic/Historical Engine Tech
Topic: Ford 289 Camshaft Manifold Carburetor
Replies: 26
Views: 1005

Re: Ford 289 Camshaft Manifold Carburetor

That cams work well used one in my own car. good mid range pulls hard to 6k. It will pull past 6k if you need to push it in a short section.
by Mummert
Tue Mar 02, 2021 1:37 pm
Forum: Engine Tech
Topic: Cam C/L selection - Fiat twin cam
Replies: 15
Views: 657

Re: Cam C/L selection - Fiat twin cam

The current plot shows 110 ICl 103-4 ECL little hard to tell. If you're raising the compression at least 2 points at the same time you might try 110ICL. With the static compression staying the same and being low to boot, the bigger intake cam will lower the cylinder pressure even more. If you want t...
by Mummert
Tue Mar 02, 2021 3:18 am
Forum: Vintage/Classic/Historical Engine Tech
Topic: Ford 289 Camshaft Manifold Carburetor
Replies: 26
Views: 1005

Re: Ford 289 Camshaft Manifold Carburetor

Add in at least $2000 in professional porting and valve work and then I've seen it happen. Geoff, would have to speak to how much he had in his heads, on his 450+ hp 289 EMC engine. I played around with a set of C6 heads, w/o touching the SSR and got 196 cfm @ .500. Just 1.9 LS valve and blending t...