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Search found 4550 matches

by GARY C
Sat Aug 17, 2019 4:55 am
Forum: Engine Tech
Topic: 600 HP 350 SBC?
Replies: 118
Views: 4036

Re: 600 HP 350 SBC?

what do you need? i dont understand the question Then why are you posting on a thread you don't understand? My head info starts 3 pages back. you asked if the maths was wrong. i simply explained why it isnt. thats why it hasnt been corrected But the person presenting it says it is... So why not add...
by GARY C
Sat Aug 17, 2019 4:50 am
Forum: Engine Tech
Topic: 600 HP 350 SBC?
Replies: 118
Views: 4036

Re: 600 HP 350 SBC?

first you must understand some defintions: volumetric flow rate = velocity x area lets use proper consistent units CFS = ft/s x ft^2 CIS = in/s x in^2 note that flow bench volumertic flow rate is CFM i.e. per minute not second hence ive used CFS also note the area is normally stated in^2 not ft^2 r...
by GARY C
Sat Aug 17, 2019 4:44 am
Forum: Engine Tech
Topic: 600 HP 350 SBC?
Replies: 118
Views: 4036

Re: 600 HP 350 SBC?

Gary, the maths is correct but it's an average that tells you what it would be if you sample at infinite points for the calculation at the section. the more complicated the shape the more points you need to measure if you are trying to measure the average and arrive at same as calaulated as some ar...
by GARY C
Sat Aug 17, 2019 4:31 am
Forum: Engine Tech
Topic: Custom vs Catalog Cams
Replies: 132
Views: 3726

Re: Custom vs Catalog Cams

Talk about old school Herbert sent me a cam without prepaying....I needed it for a Saturday so he just sent along an invoice. Nick Arias sent me an extra piston (gratis) after I broke twice in one season. Got a note (said "you might need another") with the spare I had ordered. Now that kind of serv...
by GARY C
Sat Aug 17, 2019 4:28 am
Forum: Engine Tech
Topic: Custom vs Catalog Cams
Replies: 132
Views: 3726

Re: Custom vs Catalog Cams

Speaking of Herbert, I wonder if Ruben is still grinding cams. All of those cams were ground with 1940's methods, tracing, offsetting and blending. No computation involved, not even pencil and paper. 1940's .440+ cam lobes? Don was the grinder I dealt with in the late 90's/2000's, lobe vs rocker ra...
by GARY C
Sat Aug 17, 2019 3:11 am
Forum: Engine Tech
Topic: 600 HP 350 SBC?
Replies: 118
Views: 4036

Re: 600 HP 350 SBC?

Gary, the maths is correct but it's an average that tells you what it would be if you sample at infinite points for the calculation at the section. the more complicated the shape the more points you need to measure if you are trying to measure the average and arrive at same as calaulated as some ar...
by GARY C
Fri Aug 16, 2019 11:40 pm
Forum: Engine Tech
Topic: 600 HP 350 SBC?
Replies: 118
Views: 4036

Re: 600 HP 350 SBC?

265cfm x 2.4 = 636 / 1.85in² = 344 fps calculated. But measured it's around 360-370 through the pinch 5.300 x 16.387 = 86.9 / 172cc = 1.97 AVG CSA 265cfm x 2.4 = 636 / 1.97 AVG CSA = 323 AVG FPS If the math is wrong in the first equation wouldn't it be wrong in the last one as well? Makes me wonder...
by GARY C
Fri Aug 16, 2019 10:38 pm
Forum: Engine Tech
Topic: Custom vs Catalog Cams
Replies: 132
Views: 3726

Re: Custom vs Catalog Cams

I've always been a low buck, or no buck, racer. Back in the 80's I had a speed shop sponsor so I got free Engle cams to run in my dirt car. My pit guy blew one of our 351-c's while packing the track one night. Broke the cam. I was out of cash and out of free camshafts. So I called Chet Herbert (lat...
by GARY C
Fri Aug 16, 2019 10:31 pm
Forum: Engine Tech
Topic: 600 HP 350 SBC?
Replies: 118
Views: 4036

Re: 600 HP 350 SBC?

All classes allow the Dart to replace the 041 type head. World Products has a legal head as well. The aluminum is certain classes, then of those, certain classes can run angle plug. No matter what, they get hit with added weight to run an aftermarket legal head. Most of the OEM port volumes have to...
by GARY C
Thu Aug 15, 2019 11:07 am
Forum: Engine Tech
Topic: 600 HP 350 SBC?
Replies: 118
Views: 4036

Re: 600 HP 350 SBC?

KnightEngines wrote:
Thu Aug 15, 2019 9:50 am
You need around 2.2^" mcsa & 265-275cfm at max valve lift through intake & head to make 600hp - if the port if efficient.
I haven't started on the intake yet but thats about where I expected I would end up.
by GARY C
Thu Aug 15, 2019 2:49 am
Forum: Engine Tech
Topic: 600 HP 350 SBC?
Replies: 118
Views: 4036

Re: 600 HP 350 SBC?

gm, that sounds interesting.
by GARY C
Thu Aug 15, 2019 12:37 am
Forum: Engine Tech
Topic: 600 HP 350 SBC?
Replies: 118
Views: 4036

Re: 600 HP 350 SBC?

Gary, Do you have DV's and my FLOW Program? You would need port height, port width and what each corners radius is. Stan Gary, I have a new email address. I have sent you an email. I am going to make an assumption that the bottom of the port is a continuous arc. That means the port width is the dia...
by GARY C
Wed Aug 14, 2019 8:49 pm
Forum: Engine Tech
Topic: 600 HP 350 SBC?
Replies: 118
Views: 4036

Re: 600 HP 350 SBC?

A run down on my Rectoval port, I have not cc'ed it because all of the stuff I used to cc has disappeared, not sure how to measure a Rectoval? Flow is 2-140 3-200 4-244 5-277 6-300 7-303 7.5-305 Air speed from enter through port is 397, ssr apex floor is 418...Where to go from here? Gary, Do you ha...
by GARY C
Wed Aug 14, 2019 8:42 pm
Forum: Engine Tech
Topic: 600 HP 350 SBC?
Replies: 118
Views: 4036

Re: 600 HP 350 SBC?

A run down on my Rectoval port, I have not cc'ed it because all of the stuff I used to cc has disappeared, not sure how to measure a Rectoval? Flow is 2-140 3-200 4-244 5-277 6-300 7-303 7.5-305 Air speed from enter through port is 397, ssr apex floor is 418...Where to go from here? Gary, Is this a...
by GARY C
Wed Aug 14, 2019 8:39 pm
Forum: Engine Tech
Topic: 600 HP 350 SBC?
Replies: 118
Views: 4036

Re: 600 HP 350 SBC?

It sure “looks” big for only 305cfm. Well, I don’t mean “only 305cfm”....... but it looks bigger than I’d expect 305cfm to look. I don’t see much high effort sbc stuff at my shop(I do mostly Mopar stuff), but here’s some numbers from an ootb cnc ported TFS 230cc head(uses a 1206 gasket) .....tested...