Another dyno session today
 

My partner in crime here Mike Tkach decided to redyno one of his engines today. A while back, his parts supplier, sold him the standard street morel lifters, for these engines. Told him "these are the lifters all my marine guys run". Well, after looking at them, we noticed they were not the good endurance lifters. They had some run time on them, with no issues yet, but YET, being the key word. So, Mike bought the right ones. He also upgraded his pushrods to a .135 wall while swapping them out. Our thought was initially to prevent parts breakage, as the street lifters just arent up to the task at hand here. We also talked about the possibility, that the street lifters (which werent designed for the spring psi he has) were possibly bleeding down, sacrificing some cam lift. Alot of things I discussed with RMBUILDER on the phone. It just made sense.

Today, we ran it again. Same jets, same overdrive, same timing as last year. Last years peak was 1167HP. Today, we saw 1201. We did have good air today, compared to last session, which netted about 1/2psi more boost at peak.

Mikes engines are 588CI, callies magnum cranks, carillo rods, Dart 355 CNC heads, hyd roller cammed, 8.3L whipple with a pair of quickfuel 1050's. Its amazing how well those bypass valves work, for idle quality.Its always a lot of laughs with this crew...Mike Tkach, Icdedppl wrenching on the blower, and me representin oso. Good times. [ATTACH=CONFIG]520721[/ATTACH][ATTACH=CONFIG]520722[/ATTACH][ATTACH=CONFIG]520723[/ATTACH]

WTF. Here we go again with the sideways pictures. Dan, help me out here will ya.

Sick!

Stout numbers. Is that on dyno headers or marine exhaust? Looks like he's taking A/F readings for left and right bank instead of individual cylinders. I'm looking at dyno shops near me, and most of them seem to do it this way. I'm guessing you would have less issues with even cyl-to-cyl distribution with the dual carbs and supercharger. Wondering if I need to find a shop that can take individual A/F numbers for my single carb NA build. thoughts?

Wait, I read here that you can take a truck engine to 7500 rpm, why are you spending big money to make the same hp? :D

Well, at least the avatar isn't sideways. We would all have sore necks! :)

Love them screw blowers!


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let me get you straightened out Joe:



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Dyno headers. Yes, they are taking the AFR readings from behind the collector. They have an EGT temp probe in each cylinder. The temps from cyl to cyl, are all within reason. About as good as it gets, without port efi imo. Engine ran with BP 93 gas today.

Yeah, one of the shops I talked to was just doing the A/F ratio at the collectors - nothing on the individual runners. Not sure if I'm comfortable with that.

I think you'll be just fine on a 600HP N/A deal. Watch the EGT temps. You can work the jets a bit to help cool a hot cylinder.

i believe that was a flat tappet hydraulic cammed 350/260 merc engine,LOL

It's pretty incredible the difference paying attention to the details makes . You guys did something we can all learn from , GREAT JOB !!

Speaking about oil and hp, that thing was at 100psi oil pressure ? Yikes.

thanks sam,mild talks to bob madera alot and when discussing my lifter delema with bob,along with john callies they both said that the street lifters my normal parts guy talked me into buying were not right for the spring pressures and rpm,s my engines have so i decided to bite the bullet and change them to the racing lifters that i was origionally going to use.bob also recomended going with the heavier wall pushrods.at first i could not grasp how a .080 wall pushrod could be bending but when it was explained to me what a spintron was seing i decided to upgrade to the .135 wall pushrods.the atmospheric conditions were a lot better today than they were on my last dyno session but i do feel that the changes i made did help a little in the hp department but the peace of mind having the correct parts is the big reward.i want to thank mild thunder and icdedppl for their help today.dan refered to us as THE 3 AMIGO,S.one thing is forsure ,we do help each other and we all learn from each other.

in the boat with the oil cooler conected it drops app 20 lbs,also i changed from brad penn to valvoline oil and even though both are 20w50 the valvoline made more pressure.

That is exactly how a brotherhood works . You guys are returning this to the OSO I knew and loved . Shared information like that is priceless to some of us !!

Nice job guys! That's really cool that you get your whole crew together and go to the dyno. Seems like the blood swet and tears pay off a little more when you have your buddies around and your slapping high 5's. 2 questions. How good were your quick fuels out if the box? And how big a lift cam are you running?

we did do some jet changes but in the end we are jetted almost exactly as they were when i took them out of the box,imo the quickfuel carbs are the way to go.i know it sais crane cam on the dyno sheet but that is not correct,these are custom grinds from comp cams 648 lift 256I 270E at .050hyd roller.in the future i will consult with bob madera for my camshafts unless the build warrants a shelf COOKIE CUTTER cam.

I'm gonna push the morel lifters past there limit on my new build that's y I ask. I ran them .696 on the last build. Also gonna go with a quick fuel cause I'm cheap and they work...

+1

Bob is a wealth of information and the unrivaled expert in our sport, and a hell of great guy.

Dude.....lets not make this an oil thread :D hahah

Thank you for your Valvoline purchase

That is awesome. I was reading up on prostock motors recently, they are all about stiff valvetrains over lightness. Monster cam diameters, big lifters, big pushrods, and tremendous spring pressures. They are trying to prevent any unwanted deflection in the pushrod and cam.

yes and i believe they shift at 11000+rpm,amazing for a pushrod engine.

Nice work boys. That's some impressive power!!!

Great thread, thanks for sharing! You guys have put together some nice pieces and I've learned a lot from you all. Thanks! :boat:

Yeah and they use valves made out of material much like the good valve seats cost something like $500 a valve and they only run them one run. 60mm cams with no cam bearings (they coat the cam and let it ride in the block) 5/8 pushrods. Of Coarse that was about 5 years ago I don't know what exactly they are doing now cause everyone is renting motors and not alowed to do any work to them.

Sweet! Thanks for sharing. I need a HP support group in CLE like they have in Chi-Town....

Right on the Quick Fuel carbs. They are here in Bowling Green about a mile from Holley. They are great people and will do anything you need no problem. They run their carbs prior to being shipped. I've used them on several engines and they have all been calibrated near perfect right out of the box. IMO the least expensive and the best.
Nice engines, congrats.

Very cool! I bet you guys had a blast playing with that engine.

Icdedppl and I were talking about Mike's engine last night. It really is a fun piece, and makes our 800 and 900hp engines look like little girls. I like it because its old school muscle, with a modern twist thrown in (whipple). They really put ya in the seat in his 38 Fountain with 6's. The fun part is even with the twin 1050 carbs, it will idle at 900 in nuetral, and pretty docile around the docks.

How fast?

Full grown he man boat!!!

Nice numbers and it looks great

Honestly, havent seen the full potential of the boat. It had some really crappy old 4 blade props, that weren't helping anything. Not only were they damaged a bit (Previous owner), they weren't even matched rpm wise. With that being said, we went 112-114 I believe, dragging a little tab and drives nuetral. He has a set of hering 5 blades to go on soon. Plus the bottom has been fully blueprinted since the last run.