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Search found 239 matches

by HQM383
Tue Aug 16, 2022 2:42 am
Forum: Engine Tech
Topic: 383, 11.6 compression, pump gas advice
Replies: 12
Views: 315

Re: 383, 11.6 compression, pump gas advice

FWIW I think your 93 octane is the same as our down under 98 RON. If your cam installed straight up will have intake valve close 51* ABDC @.050”. My 383 engine is 11.4:1 static and cam that intake closes 48* ABDC @.050”, timing 34*. Never heard a ping with our 98 RON fuel. If your heads aren’t porte...
by HQM383
Tue Aug 16, 2022 2:19 am
Forum: Engine Tech
Topic: Soldering/drilling jets?
Replies: 9
Views: 262

Re: Soldering/drilling jets?

For reference

Image
by HQM383
Mon Aug 15, 2022 10:21 pm
Forum: Engine Tech
Topic: Soldering/drilling jets?
Replies: 9
Views: 262

Re: Soldering/drilling jets?

No harm. It just might be hit and miss and take several tries as you don’t know what the jets flow after drilling. The carb doesn’t care about number stamp or hole size, just the flow and pressure differential.
by HQM383
Mon Aug 15, 2022 2:17 am
Forum: Engine Tech
Topic: So which heads will get my 358 in the high 10's
Replies: 82
Views: 4155

Re: So which heads will get my 358 in the high 10's

1000 M/D (limited time) and ya I know it was too big Maybe not as too big as first thought. Wished I would have gotten a few more runs as I would have like to run my modified 600 Holley VS I have. It works really good on intakes like this. Last time I ran it on this 358 with a different set of head...
by HQM383
Sun Aug 14, 2022 10:14 pm
Forum: Engine Tech
Topic: So which heads will get my 358 in the high 10's
Replies: 82
Views: 4155

Re: So which heads will get my 358 in the high 10's

1980RS wrote: Sun Aug 14, 2022 8:11 pm 1000 M/D (limited time) and ya I know it was too big
Maybe not as too big as first thought.
by HQM383
Sat Aug 13, 2022 7:42 pm
Forum: Engine Tech
Topic: 383 sbc first dyno experience
Replies: 125
Views: 4556

Re: 383 sbc first dyno experience

It's a simple time/area thing. Without changing capacity to make more power you either gotta cram more air in per rev or turn more rpm, or both. Once you get much above 110% ve it's far easier to turn more rpm that to improve ve%. To go from say 6500 to 7000rpm peak power requires about 8% more tim...
by HQM383
Sat Aug 13, 2022 6:38 am
Forum: Engine Tech
Topic: 383 sbc first dyno experience
Replies: 125
Views: 4556

Re: 383 sbc first dyno experience

I've been following this build with great interest and what has been acheived with valve size, mcsa and cam. Impressive and challenges some accepted norms. Steve, Tony, educate me on a cam of roughly 266* @.050" operating range and the heads being used that have 1.94" int valve, average 2.10 mcsa a...
by HQM383
Fri Aug 12, 2022 11:56 pm
Forum: Engine Tech
Topic: 383 sbc first dyno experience
Replies: 125
Views: 4556

Re: 383 sbc first dyno experience

I've been following this build with great interest and what has been acheived with valve size, mcsa and cam. Impressive and challenges some accepted norms. Steve, Tony, educate me on a cam of roughly 266* @.050" operating range and the heads being used that have 1.94" int valve, average 2.10 mcsa an...
by HQM383
Wed Aug 10, 2022 6:19 am
Forum: Engine Tech
Topic: clear coating engine
Replies: 15
Views: 496

Re: clear coating engine

Look to the marine sector if it’s aluminum protection you’re after

https://www.amazon.com/Aurora-Alumetron ... B00460QZ0O
by HQM383
Tue Aug 09, 2022 6:12 pm
Forum: Engine Tech
Topic: Where can I get these?
Replies: 9
Views: 454

Re: Where can I get these?

Might be worth giving these guys a call if you haven't already

https://allcarbs.com/?v=920f83e594a1

https://blp.com/cart/index.php?main_page=index&cPath=65
by HQM383
Sun Aug 07, 2022 8:14 am
Forum: Engine Tech
Topic: rod bolt torque compared to stretch
Replies: 32
Views: 4415

Re: rod bolt torque compared to stretch

But the actual stretch is so much more important than the torque applied. I have to agree with you there Tom. It’s the tension the bolt is under due to it’s stretched condition that provides the necessary clamping force, not the twisting force applied to tighten the bolt. Just look at LS critical b...
by HQM383
Fri Aug 05, 2022 9:58 pm
Forum: Engine Tech
Topic: Drilling holes in head gaskets = more flow = lower temps: Change My Mind!
Replies: 41
Views: 1386

Re: Drilling holes in head gaskets = more flow = lower temps: Change My Mind!

You have to get your head around flow and think distribution. https://www.felpro.com/technical/tecblogs/size-and-position-of-coolant-holes-on-gaskets.html Fun fact: coolant flow through a radiators core must go turbulent to ensure heat transfer from wall of tubes to the fins. Laminar flow would make...
by HQM383
Thu Aug 04, 2022 10:26 pm
Forum: Engine Tech
Topic: Looking for some Help...SBC Oil fouling plug
Replies: 45
Views: 938

Re: Looking for some Help...SBC Oil fouling plug

Picture of said plugs?

Oil coming down from the top will mist (atomize) a bit through being caught in intake air and burn different than oil coming up from the bottom.
by HQM383
Tue Aug 02, 2022 7:40 pm
Forum: Engine Tech
Topic: Questions about ports that stall, and cam lift.
Replies: 32
Views: 1099

Re: Questions about ports that stall, and cam lift.

Scroll down to “notes on airflow” https://jonkaaseracingengines.com/shop/cylinder-heads/kaase-p-51-cylinder-heads/ Thanks for that, great insights. A statement from a very smart guy from a now defunct forum looks at it the same but from a different perspective “please consider thinking about an eng...
by HQM383
Sun Jul 31, 2022 1:08 am
Forum: Engine Tech
Topic: 383 sbc first dyno experience
Replies: 125
Views: 4556

Re: 383 sbc first dyno experience

For anyone interested, Have ran car over last few weeks. Had a run tonight. New 255/60/15 R series radials. Backed up cam timing 4 degrees so cam is straight up 109 - 109 . Car responded with a mph increase to where it should be . I have my 950 hp (750) back on as well,still rich will be taking som...