Search results

Folks, I apologize for evidently making a mess of this. There have been at least three who've gotten confused, and where there's one, there's probably 20. So, I'll just can it from now on -- I'm not going to add more confusion. My purpose in speaking up in the first place was to try to put...

Ok, this is in regards to Pill's request for an optimum 289 -- which I'm taking to be a max effort, yet streetable, warrantied, 289. I'm going to use the Ferrari 458 masterpiece of an engine as the bogey. It is listed as making 562 HP @ 9000 rpm and 398 ft-lbf @ 6000 rpm. I am going to use...

T: I have no idea about what Voodoo even is! lol I've read the term here, and I take it to be the next step beyond the Road Runner. But I am likely wrong. Reliability is something folks seem to take for granted, and is a most under-rated aspect of an engine. Sounds like yours is...

Nice work Josh. Very interesting to hear several say the car looks much better 'live' than in photos. Thanks.

BMEP's for the Ferrari 458 Italia engine (evidently named the F163FB). According to my searches, peak torque = 398 ft-lbf @ 6000 rpm and peak power = 562 HP @ 9000 rpm. BMEP @ peak torque: 218.71 psi BMEP @ peak power: 180.22 psi Remember that mean piston speed is 24.30 m/s -- a much more...

Trackaholic -- here are some numbers for the VQ35HR. In my internet searches for various spec's, I found the peak torque to be 268 ft-lbf @ 4800 rpm and peak power to be 306 hp @ 6800 rpm, with a 7500 rpm redline. bore: 95.5 mm stroke: 81.4 mm rod: 151.74 mm displacement: 3,498.4 cc...

Falc'man: 5.15L would be the 94 mm bore with the original 92.7 mm bore. Specific torque is a very effective measuring stick. It's the same as BMEP, actually, just different units. It's an effective way to level the playing field, so to speak. We are fortunate indeed to have Pill around. A...

You're welcome! It appears to be a reasonable 'design'. Bill

You and I are on the same page -- my condolences, lol! However, I think the engine might be exhaust bound. Not faulting the folks who designed the current headers, as the headers obviously do a fine job given the design constraints: fitting in the engine bay and keeping the cats close to the...

Thanks for your concern about my effort, but this takes little time. Mean piston speed is a trivial calculation: twice the stroke multiplied by the rpm. BMEP and VE vs BFSC are almost as easy (there is a division involved in each of those). Max piston speed, peak acceleration, and the...

TTH: I ran two sets of numbers for you. First is @ 8500 RPM: bore: 94.1 mm stroke: 92.7 mm rod: 150.7 mm displacement: 5,157.5 cc (314.7 cid) rod/stroke: 1.628 mean piston speed (@ 8500 rpm): 26.265 m/sec max piston speed: 43.18 m/sec peak accel : 4,900 g's max piston speed occurs...

Something quick over lunch. Decided to run Falc'man's numbers first, as his is a more specific case than TTH's. I'll run two scenarios for TTH. Falc'man's results: bore: 94.0 mm stroke: 92.0 mm rod: 151.05 mm (to keep the pin height at the stock value) displacement: 5,107.677 cc...

No problem. I'll post the numbers tomorrow evening.

Nice one TTH. Lingenfelter was the man... Personally, I much prefer the 'music' of the Innov8Race Engines Coyote that Chopsui posted a while back. 358 cid is ~5.87 liters....

Thanks for the kind words, Falc'man. Much appreciated. Pace: I understand where you're coming from re everyone designing an engine. But, it is something that just interests me, plain and simple. Also, several of my posts dealt with the feasibility of some statements/rumors here. Then, once...

Yeah, I'd read that somewhere, Falc'man. Thanks for verifying.

Right, all things being equal. Ultimately all boils down to piston speeds, again. Shorter strokes can rev higher. Time for the rack for this old fart... later.

Yes, but not much. The Coyote is slightly under-square at 0.995 (92.2 mm bore, 92.7 stroke) while 94.0/92.7 is slightly over-square at 1.014. What are you getting at wrt bore/stroke? On edit: Thanks for the information TTH. Very interesting to hear.

Grimace -- I stand corrected. I saw 5.0 Boss, 94 mm bore, 4.6 deck height and jumped the gun. My mistake. But in any event, 94 mm bores on 100 mm bore centers. There are two 4.6 L blocks in the FRPP catalog with those dimensions. So there has to be a head gasket, or two, that'll live in...

I agree, Pill. The only possible driver (that I see) for the flat crank is equally spaced induction and exhaust pulses on each bank. How much torque and power is that worth? I'd have a hard time believing > 5%, but that's based simply on gut feel. But then there's the drawback of the...