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Search found 1762 matches

by RevTheory
Wed Mar 25, 2020 6:40 am
Forum: Engine Tech
Topic: SCAT 9000 Limits
Replies: 50
Views: 1978

Re: SCAT 9000 Limits

I wonder how much/if their life expectancy may improve with an LS firing order. Is there any data out there regarding that?
by RevTheory
Tue Mar 24, 2020 7:08 am
Forum: Engine Tech
Topic: SCAT 9000 Limits
Replies: 50
Views: 1978

Re: SCAT 9000 Limits

I was with you on the 9000 until you mentioned going flat-out for minutes on end. I'd be too worried about the crank to pay attention to what I'm doing at 140+ mph.
by RevTheory
Sun Mar 22, 2020 10:36 am
Forum: Engine Tech
Topic: Original 327 going back in my 64 Corvette with mods
Replies: 31
Views: 932

Re: Original 327 going back in my 64 Corvette with mods

That cam is going to be pretty nasty in a 327 so be sure that's what you're ok with.
by RevTheory
Sat Mar 21, 2020 3:09 pm
Forum: Engine Tech
Topic: Question For Mike Jones - Duration Vs Rod/Stroke Ratio
Replies: 37
Views: 2116

Re: Question For Mike Jones - Duration Vs Rod/Stroke Ratio

I was farting around with an earlier version of Controlled Induction yesterday and a change in rod from 5.7 to 6.125 left the seat duration alone but changed the duration further up between a degree and a degree-and-a-half depending on what lift number you looked at. It didn't change the lobe center...
by RevTheory
Tue Mar 17, 2020 11:01 am
Forum: General Tech
Topic: Vizard vs Foxwell
Replies: 42
Views: 2189

Re: Vizard vs Foxwell

With respect to designing lobe profiles, do the cam companies that use a CNC grinder have the ability to easily modify existing lobes they may have in their lineup?

Could make things interesting, not that this is ever going anywhere. The joys of self-quarantine :lol:
by RevTheory
Mon Mar 16, 2020 9:38 am
Forum: Engine Tech
Topic: Hot honing or not?
Replies: 20
Views: 1826

Re: Hot honing or not?

So in an iron block/aluminum head combo, do we run a few dyno pulls, let it cool completely, loosen and retorque the heads or leave it be?
by RevTheory
Sat Mar 14, 2020 10:03 am
Forum: David Vizard forum
Topic: Scott Foxwell Challenge
Replies: 14
Views: 2474

Re: Scott Foxwell Challenge

There's very little traffic back here David but I'm sure curious as to your thoughts on the Detroit Lean (fun time) and the scavenge plateau.
by RevTheory
Fri Mar 13, 2020 8:55 am
Forum: Engine Tech
Topic: What happened to Controlled Induction software?
Replies: 1
Views: 592

Re: What happened to Controlled Induction software?

I emailed Straub a couple of months ago and he said something along the lines of "it isn't ready yet." I don't know if he's making changes to it or what. I also don't know if he's going to offer the software for sale.

Basically, I don't know anything :lol:
by RevTheory
Thu Mar 12, 2020 9:58 am
Forum: David Vizard forum
Topic: Scott Foxwell Challenge
Replies: 14
Views: 2474

Re: Scott Foxwell Challenge

I'm guessing Straub is done making the changes he felt were necessary to Controlled Induction. Just a guess; don't quote me as gospel.
by RevTheory
Tue Mar 03, 2020 10:16 am
Forum: Engine Tech
Topic: Engine Masters rod ratio test results
Replies: 151
Views: 9364

Re: Engine Masters rod ratio test results

It's much easier to visualize the rod ratio and velocity differences if you graph it as piston position and using rod length extremes helps even more as a visualization tool. Now when you have a cam lobe profile ground using the rod ratio it makes sense and as Mike stated earlier the rod ratio test...
by RevTheory
Tue Feb 25, 2020 12:35 pm
Forum: Engine Tech
Topic: RPM Air Gap Runner Length (SBC)
Replies: 37
Views: 1850

Re: RPM Air Gap Runner Length (SBC)

How about sticking the thickest rope one can fit thru the runners and measuring the length of the rope from opening to opening? Jon brought up a good point about the runners joining together before they hit the plenum. I don't think you can get your digits in there to make any sort of fairly-accura...
by RevTheory
Sat Feb 22, 2020 12:41 pm
Forum: Engine Tech
Topic: Gains porting afr195 on sbc 388
Replies: 27
Views: 1421

Re: Gains porting afr195 on sbc 388

68corvette wrote:
Sat Feb 22, 2020 12:23 pm
RevTheory wrote:
Sat Feb 22, 2020 11:52 am
What have you tried for carb spacers?
I do not know if spacer was tested.
Car is an C3 Corvette, so it could be that I need to surface some off from the carb bad before it fits under the hood.
I was thinking a 1.5" tapered spacer but there's no way that's going to work under a C3 hood.
by RevTheory
Sat Feb 22, 2020 11:52 am
Forum: Engine Tech
Topic: Gains porting afr195 on sbc 388
Replies: 27
Views: 1421

Re: Gains porting afr195 on sbc 388

What have you tried for carb spacers?
by RevTheory
Wed Feb 19, 2020 11:44 am
Forum: Engine Tech
Topic: Minimum Cross Sectional Area: Question
Replies: 155
Views: 6016

Re: Minimum Cross Sectional Area: Question

Hey skinny, you're running EQ iron Vortec's, right? Do you happen to know if they're more resistant to detonation than non-Vortec chambers?
by RevTheory
Sat Feb 15, 2020 1:37 pm
Forum: Engine Tech
Topic: Why does a tighter lsa need more compression?
Replies: 140
Views: 5445

Re: Why does a tighter lsa need more compression?

It is possible to calculate useful information if the following data is provided for both engines. Bore = xx in Stroke = xx in chamber volume = xx cc IVC= xxx BTDC Rod = xx in Fuel specs... Inlet press = xx psi Inlet temp = xx F SCR = DCR= to be determined TDC press = to be determined TDC temp = to...