MotorHead

I am wondering why you didn't post at what RPM you made the 511ft/lbs. I would like to know what Tq this mystery motor made at 2100 RPM and 3500RPM.

When I build an engine I always keep records of it's performance that way I can refer back to them and not pull them out of my rear.

We are comparing the "way to big" 219cc heads against 195cc heads that actually flow much better especially in the low to mid range so with a better flowing head and you smaller port "wisdom" there should be no comparison. The 195's should kill the huge 219cc Vic jrs. across the board.

I will be waiting for a printout of your 406ci with the parts list ( just the important parts ) to see if it is a street engine. If I don't see anything I know exactly what you are full of.

StraubTech

Send me an email and you can post the dyno sheet. I will say I have to remove the shops name as they don't tell people where they get their cams.

MotorHead

I did a back to back test on a 355ci engine. Tested the RPM Air Gap dual plane and then the Vic Jr single plane and the HP and Tq where pretty much equal until 6000RPM where the Vic Jr gained a few ponies. The OP could use the RPM Air Gap, it is a great intake

MotorHead

You all of a sudden can't post pics ? Like I thought some dyno sheet from some shop in fairy tale land will show up or nothing at all

StraubTech

The dyno sheet is an Adobe PDF and it won't upload. If someone can tell me how I will.

StraubTech

The parts list is on the thread that I posted about this engine a couple of weeks ago.

StraubTech

This is a 383 pump gas build. 195s, 10 to 1

StraubTech

This is a 372, 4.125 x 3.48" stroke. This has a set of AFR195s. Nice power for a short stroke engine. Combo I feel is good for the C3 platform.

StraubTech

This was a solid roller that got replaced with another solid roller. I took .040" worth of lift out of it, I reduced duration at .050" on the intake by 12 degrees and duration on the exhaust by 7 degrees. We went from a 112 Lobe Sep to a 109 lobe sep. Nice average gain.

Little Mouse

I saw something that shocked me in high school with a PE coach. I would say from memory he was probably around 35 around 5' 9 fairly big gut. We had teens that could run around that track pretty quick on the friggen track team. He took off running and outran them all the way around the track twice they had longer legs for each stride they took. Never will forget that. I mean that guy flew around that track for a couple of laps beating everyone. He not only out sprinted them kept the lead no problem.

Anything i like not very few would like on the street on this forum. My version of street only means it could still be pulled up to a gas pump be filled up. What im working to is very light chances are it won't way over 2000 lbs without me in it. Ya when you have a heavier normal street car and very wide ratio trans that almost everyone has today or only the three gears in an old 350/400 autos you still have wide drops you need torque for all this wide stuff.

but if all you can do is slide tires on the street so much torque. I out ran cars with considerable more torque then i had at lower revs would simply catch them at a rolling speed take there torque advantage away from them then it became they were having to shift way earlier then me while i was still in gear.

I experimented with two BBC a long time ago 396 and 454 oval ports and rectangle ports used on both engines. Mild hydraulic cams to mostly a copy of and L/88 cam with tighter lobe center. Used the factory dual planes edelbrock single plane and even a factory trypower. Built my own version of a 396/375 just did not have the 4 bolt block to work with. A 396/375 with the 300 heads would just eat up a 350 hp 256 runner 396/350 hp car. One guy had a 69 chevelle took it to the track auto car oval heads, well he tried a set of rectangle heads the car did not slow down but it did not run any quicker. He was being out run by a 331 chevy in an even heavier car a 63 impala.

pauldanas engine probably has more compression then waynes 427 Wayne could have used considerable more compression which is power everywhere for him and still run on pump fuel. the fuel injection system should be some help over the entire power band. I'm sure your smart enough to have the cam fairly maxed out for what he wanted to do.

pauldana could make more power and barely move anything up higher. So can wayne he does not have to move things up higher.

63mako

Problem is it matches up almost perfect with the 195 ports. Too small of ports for 210 or bigger unless you port it quite a bit or extrude hone it. OP wants a dual plane.

63mako

Here it is. Had to print then scan it to photos, load it on photobucket and couldn't enlarge it. Might have to zoom to read it.

ezobens

Now THAT is a thing of beauty!
Over 500 ft/lbs from 3000-5000 RPM.
Awesome.

63mako

That is the 406 from Straub with AFR 190 heads. (Think that would be the pre eliminators.) or the AFR 190 vortec. Have to ask Chris.
https://www.corvetteforum.com/forums...ual-plane.html

StraubTech

406
6" rods
10 to 1 Compression
Canada Unleaded PUmp Gas
190AFR,
Chinese Air Gap Intake
Straub Hyd Roller
MOrel Street Series hyd Roller lifters
850cfm carb

Documented Small Heads Small Camshaft, Hyd. roller at that.
Customer, engine builder, does not own dyno so he takes his stuff to a competitor for dynoing.

StraubTech

Thank you for posting this. It is an older set of AFR190s

OMF

Thats basically what I'd like to have..... I even have the Canadian unleaded !!, I guess i need to contact you for a cam.

OMF

I'd like to reuse the Comp ultra pro guided roller rockers off my vortec heads. If I remove the guide plates does anyone see a problem with this?

StraubTech

You can do that.