Originally Posted by MILD THUNDER (Post 4484549)

I'd be pretty thorough on the measurements, and certainly account for and measure piston rock. When I am putting together an engine, I measure the piston to deck height with a deck bridge and dial indicator after the shortblock is assembled. once those measurments are taken, THEN gaskets are ordered.

IMO, the benefits, do not outweigh the risks of playing with extremely tight quenches, on a bbc, unless you are building an all out competition engine. If the piston is at 0 deck, .027 is playing with fire, even with a steel rod. Staying in the .040-.060 range, is fine for a N/A build, and most forced induction builds.

I would imagine that Bob M, spec'd those gaskets, assuming the blocks were being zero decked. I don't know how anyone would know the specific blocks deck height, without physically measuring, if in fact, the block was anything other than zero deck. Unless they are virgin blocks from world products, but even then?

Originally Posted by MILD THUNDER (Post 4484552)

Screw it. I was enjoying some evening coffee, but I think its time to switch gears, and break out the Makers 46. This thread deserves a toast.

Originally Posted by SB (Post 4484555)

I'll take your coffee then. I may wanna stay up for a bit now.

Originally Posted by SB (Post 4484555)

I'll take your coffee then. I may wanna stay up for a bit now.

Originally Posted by SB (Post 4484561)

Scratch that. Drugs will be better now.

Originally Posted by I.C.U.Lookin (Post 4484550)

Wouldn't be surprised. Most combos make more power when the madera cams are tossed.

Originally Posted by MILD THUNDER (Post 4484558)

Interestingly, I was drinking from an "Allstate Carbs" coffee mug I recieved free when ordering some carb parts last year.

Would it kill Bob to throw in a MK hat or koozy when ordering cams and heads? Maybe Tim would feel better about his situation if he had a hat to keep his head warm and beer cold. :party-smiley-004:

Originally Posted by MILD THUNDER (Post 4484558)

Interestingly, I was drinking from an "Allstate Carbs" coffee mug I recieved free when ordering some carb parts last year.

Would it kill Bob to throw in a MK hat or koozy when ordering cams and heads? Maybe Tim would feel better about his situation if he had a hat to keep his head warm and beer cold. :party-smiley-004:

Originally Posted by phragle (Post 4484569)

How can you say you have been there if you dont have the T Shirt???

Originally Posted by Black Baja (Post 4484543)

Never gonna happen on Nickersons dyno. After the first pull he's going to tell him the cam is all wrong and he has a guy down the street that custom grinds his cams for $500. His custom cams are actually $250 Erson cams... It will make 100hp more on his dyno with the custom Erson shelf grind.

Originally Posted by MILD THUNDER (Post 4484549)

I'd be pretty thorough on the measurements, and certainly account for and measure piston rock. When I am putting together an engine, I measure the piston to deck height with a deck bridge and dial indicator after the shortblock is assembled. once those measurments are taken, THEN gaskets are ordered.

IMO, the benefits, do not outweigh the risks of playing with extremely tight quenches, on a bbc, unless you are building an all out competition engine. If the piston is at 0 deck, .027 is playing with fire, even with a steel rod. Staying in the .040-.060 range, is fine for a N/A build, and most forced induction builds.

I would imagine that Bob M, spec'd those gaskets, assuming the blocks were being zero decked. I don't know how anyone would know the specific blocks deck height, without physically measuring, if in fact, the block was anything other than zero deck. Unless they are virgin blocks from world products, but even then?

Originally Posted by MILD THUNDER (Post 4484558)

Interestingly, I was drinking from an "Allstate Carbs" coffee mug I recieved free when ordering some carb parts last year.

Would it kill Bob to throw in a MK hat or koozy when ordering cams and heads? Maybe Tim would feel better about his situation if he had a hat to keep his head warm and beer cold. :party-smiley-004:

Originally Posted by MILD THUNDER (Post 4484568)

Lets not get off topic just yet. We havent hit 50 pages yet. :helmet:

I wonder what the science is, behind the fact, Timmys 540ci engines, with AFR 325 heads, got a 241/246 cam, and the tight quench guy, gets a 242/247 cam, with a little less lift? Both have flat top pistons, 4150 carbs, both heads milled to 114cc... Why the change?

Originally Posted by mild thunder (Post 4484571)

exactly.

For christmas, i might get tim a tee shirt with his dyno sheet printed on the back.

Originally Posted by MILD THUNDER (Post 4484558)

Interestingly, I was drinking from an "Allstate Carbs" coffee mug I recieved free when ordering some carb parts last year.

Would it kill Bob to throw in a MK hat or koozy when ordering cams and heads? Maybe Tim would feel better about his situation if he had a hat to keep his head warm and beer cold. :party-smiley-004:

Originally Posted by Full Force (Post 4484610)

I can say one thing, the cams that erson custom ground for my old engines moved this slug VERY well, the acceleration was WAY better from 4000-5500...

Originally Posted by Black Baja (Post 4484617)

I would expect it to with a bigger arm spinning around. Acceleration gets better and better the bigger the crank even with junk heads on the motor. I kept same heads went from 4.5 stroke to 4.75 stroke and difference was night and day. 4.75 felt like a blower was added. Added 30* of duration to the cam with the bigger stroke.

Originally Posted by jsand117 (Post 4484532)

like I said, I will post for sure where the final comp. ended up, think the pistons were 10 in the hole but will verify exact numbers. motors still with the builder.

Originally Posted by jsand117 (Post 4484522)

I am a few weeks away from my 540's being finished. similar to Tim, Bob M. spec the cams and heads. afr 325 114 cc the cams are 242.2 664 on intake 247.1 656 on exhaust flat top JE pistons, merlin 3 blocks zero deck and the head gasket he set me up with from cometic is .027. I am running Nickerson 4150 on merlin single plane intakes. carbs flow 994 CFM. as soon as the engines are complete they are going to Nickerson for dyno and tune. I will be happy to provide the results here. I can find out from my builder what the final comp. ended up, our target was 9.8 :1. will post more info as I get it.

Originally Posted by rmbuilder (Post 3831388)

Tom,
The compression ratio will increase from 8.52 to 8.69 with the move to a .027” gasket from a .039”. That is an increase of .17 of a point and while that may seem insignificant, any increase is worthwhile at that low of a ratio. A .035” piston to head clearance is ideal in a sub 6000 RPM engine with a steel connecting rod. I would advise you to check the RA of both deck surfaces to verify the finish is compatible with a MLS gasket.

Bob

Originally Posted by MILD THUNDER (Post 4484709)

Maybe his "ideal" clearance. I wouldn't run that.

As stated, this isnt nascar.

Originally Posted by MILD THUNDER (Post 4484568)

Lets not get off topic just yet. We havent hit 50 pages yet. :helmet:

I wonder what the science is, behind the fact, Timmys 540ci engines, with AFR 325 heads, got a 241/246 cam, and the tight quench guy, gets a 242/247 cam, with a little less lift? Both have flat top pistons, 4150 carbs, both heads milled to 114cc... Why the change?

Originally Posted by getrdunn (Post 4484727)

So close but... Why the difference? Curious if valve timing is same or the different as well. Regardless this will be very interesting to see the outcome. Wonder if it will be dressed with marine exhaust or dyno headers. I will step up SB's number. 681.

Originally Posted by getrdunn (Post 4484727)

S I will step up SB's number. 681.

Originally Posted by fbc25el (Post 4484859)

Did not dyno the engine. Wilson manifold matched & ported the manifold to the heads. 28 pitch prop 1.5 gears pulls strong a little past 6000 RPM. 25' cat.

Originally Posted by getrdunn (Post 4484916)

Was that a shelf cam or a custom grind? Also what duration?

Originally Posted by getrdunn (Post 4484916)

Was that a shelf cam or a custom grind? Also what duration?

Originally Posted by fbc25el (Post 4484925)

.663-.655 dur. at .050in 246* ex 250* 112 lc. custom

Originally Posted by MILD THUNDER (Post 4484948)

Question.

Seems like the Victor JR gets specd on all these builds. Also seems like, on almost every one of them, adding spacers show gains.

With that being said, why is the "super victor" intake ruled out as an option?

Originally Posted by endeavor1 (Post 4484955)

I know we made several pulls and a 1 inch Spacer was what it liked on my Vic Jr. We tried none, stacking, etc and found nothing but losses. I can see what you're saying though as the Victor has a larger 4500 flange. Could run their spacer/adapter to go to a 4150 anyway


I have the pulls labeled when we tried diff spacers. When I get home I'll see about posting up the differences

Originally Posted by Black Baja (Post 4484958)

Dominator intake has a lot more plenum volume...