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by BOOT
Sun Jun 13, 2021 5:50 pm
Forum: Engine Tech
Topic: Offenhauser intake manifolds
Replies: 28
Views: 1109

Re: Offenhauser intake manifolds

BOOT wrote: Sat Jun 12, 2021 12:55 pm also what was the shift point/max rpm. Sounds like you proved your combo better suits a dual plane.
by BOOT
Sat Jun 12, 2021 12:55 pm
Forum: Engine Tech
Topic: Offenhauser intake manifolds
Replies: 28
Views: 1109

Re: Offenhauser intake manifolds

If you believe that theory on the single vs dual plane intake than you might be giving up power some place. Here is an example for you. Last year I did a back to back single vs dual plane test. Single plane result 11.29@116mph Dual Plane result 11.26@117 and change mph. Everything else was the same...
by BOOT
Sat Jun 12, 2021 11:58 am
Forum: Engine Tech
Topic: Offenhauser intake manifolds
Replies: 28
Views: 1109

Re: Offenhauser intake manifolds

People can say what they want about some of the big buck intakes being the best, that's why we test them and some of the old stuff will surprise you. Years ago I bought a Dart oval port intake for my BBC and all the reports was the it was the intake to run and made the most power at the time, well ...
by BOOT
Fri Jun 11, 2021 2:24 am
Forum: Engine Tech
Topic: Offenhauser intake manifolds
Replies: 28
Views: 1109

Re: Offenhauser intake manifolds

I don't care, that frickin setup is cool. :mrgreen: No offense to 1980RS but that is the problem with a lot of stuff, looks > actual performance and it spills into the aftermarket. Also why I've seen many many tunnel rams and slightly used giant race cams for cheap, prob came off a street car. Don'...
by BOOT
Thu Jun 10, 2021 6:02 pm
Forum: General Tech
Topic: rpm-act
Replies: 50
Views: 2229

Re: rpm-act

Brent an ex NASCAR driver turned tuner & youtuber just got hit https://www.youtube.com/watch?v=BsX5c1A9_ls
by BOOT
Thu Jun 10, 2021 9:20 am
Forum: Engine Tech
Topic: Valve Spring Tester
Replies: 15
Views: 1441

Re: Valve Spring Tester

Picked up a digital proform mini, still not tested it yet.
by BOOT
Wed Jun 09, 2021 9:58 pm
Forum: Engine Tech
Topic: How to select the right carb boosters?
Replies: 32
Views: 1911

Re: How to select the right carb boosters?

What is the connection between heat and annular boosters? From my understanding this is how it works Heat aids atomization but hurts performance, less heat(cooler engine) increases the need for other means to aid atomization. This is why injectors are great at cold start-up and driving w/o warming ...
by BOOT
Tue Jun 08, 2021 11:01 pm
Forum: Engine Tech
Topic: distributor looens up
Replies: 23
Views: 979

Re: distributor looens up

But what is the root cause of the distributor moving? Putting a badass hold down might cure the symptom but not the cause. Is the distributor worn at the lower part, where it goes into the block (NOT the upper/intake manifold half)? Are the distributor bearings/bushings worn out? Is there an issue ...
by BOOT
Tue Jun 08, 2021 7:34 pm
Forum: Engine Tech
Topic: distributor looens up
Replies: 23
Views: 979

Re: distributor looens up

I'll add to the mount suggestions. I like the MSD one but it's overpriced, it's steel while others that look the same are aluminum. Never liked the GM one, as mentioned bent a few, I got prob 10 or so floating round my garage LOL I have an old chrome one that a friend was gonna toss that I used on m...
by BOOT
Tue Jun 08, 2021 2:49 am
Forum: Engine Tech
Topic: distributor looens up
Replies: 23
Views: 979

Re: distributor looens up

Simple, gently pull up on the rotor if it goes up some it's not bottomed out. Still idk what is normal movement/play in that brand dist but all you have to do is pull it and measure what you have to compare to what it is installed. Or you may be able to see the wear pattern on the dist gear, that co...
by BOOT
Mon Jun 07, 2021 2:41 am
Forum: Engine Tech
Topic: How to select the right carb boosters?
Replies: 32
Views: 1911

Re: How to select the right carb boosters?

I use annular for most new builds, but also size the carb accordingly. Small carbs and engines with a lot of heat may not need an annular . Another excellent point, I set my cars up to run cool and that's why I decided to get my first mainbody converted to annular. Still like many things(ie spacers...
by BOOT
Wed Jun 02, 2021 6:52 am
Forum: Engine Tech
Topic: Assumption: Valve train deflection increases with lift & higher spring load
Replies: 9
Views: 625

Re: Assumption: Valve train deflection increases with lift & higher spring load

Pushrods flex and then push back Yah but after the load is removed and lift is on the decline right? We're not talking like a slick sidewall storing and returning energy. Peak lift is still lost even if duration is lofted. Not saying if that is good or bad just saying that's how I understand pushro...
by BOOT
Wed Jun 02, 2021 6:38 am
Forum: Engine Tech
Topic: How to select the right carb boosters?
Replies: 32
Views: 1911

Re: How to select the right carb boosters?

I'll let others with more carb knowledge answer. Still in my opinion with modern pump fuel being designed for high pressure injection & low evap emissions, I like annular boosters. In my resent video I showed several mainbodies but didn't show that all but the stock 750 were converted(not by me) to ...
by BOOT
Sun May 30, 2021 8:54 pm
Forum: Engine Tech
Topic: Sbc leakdown test reveals leak to ARP studs threads
Replies: 22
Views: 1187

Re: Sbc leakdown test reveals leak to ARP studs threads

Is the block blind holes or thru for the studs? If all the studs leak a little, I would think it's a thru hole bock and the block is maybe cracked. I mean if the leakdown passes the rings on the good cylinders and it's a well sealed engine as you said it has a vac pump.

IDK just my WAG
by BOOT
Fri May 28, 2021 5:25 am
Forum: Engine Tech
Topic: Sbc roller wear patterns
Replies: 22
Views: 1526

Re: Sbc roller wear patterns

Comp Cam uses overseas junk, I've used some of their cheaper stuff in the late 90's and wouldn't use it again. I'm sure more n more these days that they import many parts as most co's do the larger and more profit oriented they get. I like their ultra pro rockers but the SS, where do you think ebay/...