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Search found 73 matches

by fasteach
Sat Jun 12, 2021 12:00 pm
Forum: Engine Tech
Topic: 243 LS SSR...Stumped.
Replies: 32
Views: 1751

Re: 243 LS SSR...Stumped.

Mag2555;
Thank you for your time this morning. Your generosity humbles me.
Here's the SSR form you requested.
Duke
[attachment=0]243SSR.jpg[/attachment]
by fasteach
Fri Jun 11, 2021 4:08 pm
Forum: Engine Tech
Topic: 243 LS SSR...Stumped.
Replies: 32
Views: 1751

Re: 243 LS SSR...Stumped.

Thank you Sir for the helpful tips. I'm just seeing this now, as yesterday was a late day between work and social commitments. I actually have the solder profile sitting on my desk in front of me, to compare against the one you kindly posted of the Mamo CNC head from the other thread. I will figure ...
by fasteach
Wed Jun 09, 2021 10:12 pm
Forum: Engine Tech
Topic: 243 LS SSR...Stumped.
Replies: 32
Views: 1751

Re: 243 LS SSR...Stumped.

Update; Laid the SSR back some and moved the crest towards the gasket a touch as instructed, with positive results. .100 .200 .300 .400 .500 .550 .600 .700 .800 69....147..209..252..281..290..290..272..278 Not fixed...but progress, and only 2-3cc of metal removal. Thank you for all the helpful advic...
by fasteach
Tue Jun 08, 2021 8:25 pm
Forum: Engine Tech
Topic: 243 LS SSR...Stumped.
Replies: 32
Views: 1751

Re: 243 LS SSR...Stumped.

Steve; I believe i read the riblet technique in Don's 740hp nascar book that everyone bought back in the day. seems it was the top of the right side page. Described in detail the grit, direction of motion, and theory. The theory was that the grooves left from the coarse grit applied extra surface ar...
by fasteach
Tue Jun 08, 2021 4:22 pm
Forum: Engine Tech
Topic: 243 LS SSR...Stumped.
Replies: 32
Views: 1751

Re: 243 LS SSR...Stumped.

Gentlemen, thank you for the interest and helpful replies. Much appreciated! Mag2555 Thank you for the photo. If i remember correctly, that was a Mamo Motorsports CNC head with a 2.055 intake. I followed that thread with interest. Did you ever get the head poured for cc? Chad; your work, as always, ...
by fasteach
Mon Jun 07, 2021 10:55 pm
Forum: Engine Tech
Topic: 243 LS SSR...Stumped.
Replies: 32
Views: 1751

Re: 243 LS SSR...Stumped.

Thank you Tony...I mean it.
Also, thanks for the reminder of the Don Terrill "riblet" shoeshine technique...i'd forgotten about that.
by fasteach
Mon Jun 07, 2021 9:15 pm
Forum: Engine Tech
Topic: 243 LS SSR...Stumped.
Replies: 32
Views: 1751

Re: 243 LS SSR...Stumped.

Thank you TK...really do appreciate your help.
I'm totally unfamiliar with 15* heads as far as runner volume cc / engine displacement...is there a basic cc i should shoot for with a 6.0 to 6500?
by fasteach
Mon Jun 07, 2021 7:41 pm
Forum: Engine Tech
Topic: 243 LS SSR...Stumped.
Replies: 32
Views: 1751

Re: 243 LS SSR...Stumped.

TK thank you for your generous advice. Currently the swirl ramp & rocker bosses are largely intact, are these contributing to the ridiculous SSR floor speeds? Currently the port pours 215cc. A 1/4in flowball placed just before the center floor apex helps flow @ .550 from 290 to 296cfm, and against t...
by fasteach
Mon Jun 07, 2021 6:39 pm
Forum: Engine Tech
Topic: 243 LS SSR...Stumped.
Replies: 32
Views: 1751

Re: 243 LS SSR...Stumped.

Sir, thank you for your reply. I bought & sawz-all'ed a truck intake to test that exact condition, and it dropped flow approximately 3% from .300 up...but does nothing to postpone the onset of turbulence. I'm testing 3 different valve backcut configurations to observe effects: no backcut, 30* & 32*....
by fasteach
Mon Jun 07, 2021 3:59 pm
Forum: Engine Tech
Topic: 243 LS SSR...Stumped.
Replies: 32
Views: 1751

243 LS SSR...Stumped.

I'm not a professional porter, i'm just an auto mechanics instructor trying to help a student with a project. I've valve-jobbed, flowed, pitot probed, flow-balled, string-wanded & CC'ed this thing. Of course it flows nicely upto .550, flowing 290cfm@28" and then erupts into turbulence from .600 up. ...
by fasteach
Sat Jul 14, 2018 9:36 pm
Forum: Engine Tech
Topic: Simple SBF Highport porting question, please
Replies: 14
Views: 1547

Re: Simple SBF Highport porting question, please

Melway, the heads come with 2.02int/1.60ex, with seats already cut. intake seats are 35/45/60 from TFS.
The combo is a duplicate of a buddy's, that runs 5.70/122 1/8 mile in a fox...different cam for my weight, and my porting instead of his.
by fasteach
Sat Jul 14, 2018 5:30 pm
Forum: Engine Tech
Topic: Simple SBF Highport porting question, please
Replies: 14
Views: 1547

Re: Simple SBF Highport porting question, please

Thank you Gentlemen, for taking the time to offer some valuable advice from your experience.
Much appreciated.
Duke
by fasteach
Wed Jul 11, 2018 6:18 pm
Forum: Engine Tech
Topic: Simple SBF Highport porting question, please
Replies: 14
Views: 1547

Re: Simple SBF Highport porting question, please

Swamp; After playing with Cleveland heads for 30 years, i've learned that the world doesnt revolve around a flowchart, and "rules-of-thumb" work...till they dont. Sq.in of area must be appropriate for the displacement, and if the port is right, it will move air. I tried and tried to trick my BOSS302...
by fasteach
Wed Jul 11, 2018 1:37 pm
Forum: Engine Tech
Topic: Simple SBF Highport porting question, please
Replies: 14
Views: 1547

Re: Simple SBF Highport porting question, please

Swamp, thanks for looking.
I'm hoping the engine will make 525ish on muscle, but Dean Harvey @ compcams specced the cam for a 300hp shot.
by fasteach
Wed Jul 11, 2018 12:47 pm
Forum: Engine Tech
Topic: Simple SBF Highport porting question, please
Replies: 14
Views: 1547

Re: Simple SBF Highport porting question, please

Thank you for the good catch!
I could've sworn i included the 204cc statement in my original post, my apologies.
In my defense, the 2 flows i've included are not from the same "before and after"port, so there may be some variance in the valve seat configuration as delivered from TFS.