Well I finally finished the install of the 383 that I shared some engine dyno results with you guys awhile back. It was impressive on the engine dyno and by the looks of today’s results just as impressive sitting between the fender wells of my C5 project car. Without a whole lot of time to tune and dial her in (my 346 combination came together and stages and I had logged some serious dyno time on that package), she put up 535 HP / 474 Ft/lbs (thru a 4.10 ring and pinion I might add).

To say I’m pretty jazzed about it would be an understatement….big numbers for a small displacement stroker that is a relatively mild combination. Not to mention if I really had the time, I would bet anything there is a 540/480 number in this combo….I will continue to refine this package and keep you guys abreast of my progress.

Just to quickly refresh your memory, this 383 consists of the following:

A shortblock “kit” provided by Scott Shafiroff Racing Engines (basically a balanced rotating assembly which consisted of an Eagle 4’ crank, Callies “Comp Star” rods, Mahle -7 cc dish pistons, and a fully machined/honed new aluminum LS1 block).
I blueprinted and assembled the engine personally. I did opt to change out the rings to a set of Total seal gapless top, which I feel added nicely to the overall package and results.

Other key components installed are:

ATI Dampener (only 10% underdrive)

QTP High volume pump (which I ported for better efficiency)

QTP 2 piece billet cover (priceless for cam swaps on the engine dyno)

Mezzeire electric water pump

Comp Cam’s custom grind solid mechanical street roller (242/248 .650 ish lift)
(Acts similar to a street friendly 234/240 hyd. grind....idles @ 900 with slight chop)

AFR 225 heads (PN 1630) milled to 65 cc’s (NOTE: Final CR only 11.0 to one!)

Crane Cams brand new “composite bearing” 1.7 shaft rockers (no needle bearings)

Ported FAST 90 mm Intake / NW 90 mm TB

LG “Pro Long tube” 1.75 inch headers

Random Technologies 3” high flow Cats (Yes…this power was made thru the cats)

Z06 Titanium mufflers with custom “bypass” that I fabricated using QTP electric cut-outs
(Note: thru the Z06 mufflers our best run of the day was 530 RWHP….impressive
considering how stealthy and quiet the car is with the cut-outs closed)

Note that the car was ran on the dyno today (and always) with heavier than stock Wilwood 13" rear rotors (which would hurt the #'s a little), and in full street trim....every belt connected and the exhaust exiting the rear of the car even with the cut-out (muffler by-pass) open. There were zero dyno tricks or BS used to achieve these numbers. Also, as most of the locals here know, Andy's dyno is known to be a little "stingy" with the numbers....

Speaking of which, I would also like to thank Andy at A&A Corvette for the use of his facility, dyno, and favorite tuner Charlie (who is also a personal friend of mine)….Charlie gave up watching the Super Bowl because he knew how anxious I was to get this car on the rollers. Also of noteworthy importance here is that fact that Charlie tuned my car with speed density (no MAF) and although we both agree it needs a little more time “finessing” the drivability part of the equation, from 2K to redline it’s smooth, crisp, and powerful.

I am going to edit this post shortly to include two short videos taken today….one of them showing a couple of runs on the chassis dyno (not the best run of the day however), and the other a little footage of the car grabbing a few gears on the street. Note that traction is non existent in first gear (totally peddling it), barely existent in second (note the “lift” of throttle trying to get it to hook up), and finally getting some legs underneath her in 3rd and 4th. The car feels awesome…..can’t wait to get her to the track!

Click here for chassis dyno vid.... http://www.guerragroup.com/TV_creati...assis_Dyno.mpg

Click here for car in action.... http://www.guerragroup.com/TV_creati..._traction.mpeg

Actual dyno gragh can be seen a few posts down....(thanks Charlie!)

Also here is a link to the original thread I started detailing this engine in various configurations on the engine dyno....Its informative but very long

http://www1.ls1tech.com/forums/showt...=384450&page=1

Regards to all,
Tony Mamo
AFR Sales / Product Design Mgr.
(818)890-0616 Ext. 109

 

Alright Tony, help me find my magic power too! Congrats on the great numbers. Those AFR 225s rock the house, even on a 3.900 bore. A Super Sunday indeed!

 

High 13's maybe...... with good air!!

Good fun today, that ***** rocks.

 

LOL... "high 13's I think"

Very nice setup.

 

very good numbers, man insane power for a 383

 

Wow Tony, zero traction in 1st gear, barely touch the rev limiter at the top of 1st and then damn near immaculate shifting in every gear. J-Rod better watch out with that kind of driving.

I've seen you at the track, now if only you could cut a light.

 

Where can I find info on the rocker arms?

 

Great numbers out of a 383!!!!! Just curious if there was a certain reason why you went with a 383 instead instead of something a little bigger????

 

I would guess because people said it couldnt be done

 

Great #'s
BTW i thought you told me/others NOT to mill the 225's past 67cc
cause my 225 are coming off and i want to mill them as much as possible.
Again very nice 383#'s

 

Ouch....LOL

Most of the time I'm at the track I don't pay attention to the lights....just trying to concentrate on proper RPM and "footwork" for a for decent launch and pitting myself against the big stop watch at the other end of the quartermile!

 

Tony, your car is wicked....here's the dyno sheet..

 

Those numbers are nuts. I see that you're running random tech cats. Do you think those flow the best for the money? I'm looking to put cats back on my 408 exhaust setup (LT/ORY/LM right now) and was wondering what cats have the best flow without breaking the bank (and the random tech's pretty much break the bank). Just wondering your input on it.

 

wow!!!!! I think my next step is going to be a stroker"kit" as well.I can't wait. I feel I have waited long enough

 

What's with the solid roller cam? I don't think a lot of people actually saw that spec. Although amazing dyno numbers, I would expect the same out of a 383 solid roller. Look at the n/a 346 thread in the same section that pulled over 500 at the wheels with a solid roller in an A3. It's only natural at .650" lift. Plus an EWP, ported 90/90, that adds up.

Nate

 

Definatly a sweet ride.....

 

Dam, thats like getting a procharger without the worry about 2 much boost! I love n/a cars! Congrats

 

Nice....You have ***** going WOT over that dip in the surface!

 

The thing that many people will miss is that Tony's motor is only 11.0 to 1 SCR and his solid roller cam would be equivalent to a 234/240 hydraulic cam (after you account for lash). That's a pretty tame for a 383 if you ask me.

 

Nice and congrats....really good way to wrap-up a project like this. I made less HP/TQ with my ATI and 10-12 pounds of boost...

Funny commentary at end of 2nd video... "high 13s I think..."