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Discussion Starter #1
OK guys (and gals ) , just got word today from Cliff @ JKRE that my parts are on the way. So i thought I would start a thread on the 27T Boss 572.

Parts ordered so far...
-C and C Aluminium block , 4.5" bore 10.32" deck.
-Bryant crank SBF snout , 4.5" stroke
-BME Aluminium rods
-Diamond 20cc dome top pistons ( 14+ : 1 )
-Danny Bee billet timing kit
-7/16ths JKRE pushrods
-Crower rollers
-Boss 9 Heads complete.
-Boss 9 Covers
-Boss 9 Intake

Hopefully they arrive in a week or two. During June/July we then;
-Mockup in chassis for new front and rear engine plates
-Mockup heads and covers for body clearencing
-Measurements for the new JPP fabricated sump.
-New mounts for the Peterson external oil and Waterman sprint fuel pumps.
-Heads to SpeedTorque for work and flowing.
-After headwork , order appropriate roller cam.
-Manifold machining for alcohol injectors and my 2500CFM throttle body/barrell valve
-Manifold to SpeedTorque for match porting and flow work
-Bottom end mockup for deck check etc
-Block to SpeedTorque for final hone and deck prep.

During this time we will freshen the current C6 out of the hotrod as my fallback/spare gearbox , and prep two transbraked C4's for testing also. We are going to see how much abuse the C4 can take.( I am glad I have SFI bell and sheilds for the C4 , may need them ).
I will use C6 torque convertor from locals at AllFast convertors , with adaptors for the C4. I expect something in the high 5000 to 6000RPM stall range , looking at the point where Jon has been making his power recently with Boss9 headed combos.Last resort is a powerglide.

Then in August it should be final assembly and off to the Dyno.

The car is currently 1880lbs with me in it , 545ci iron block and A429 Ali heads. With the new aluminium block , lighter rotating assembly and C4 , the diet may realise 150lb or more making the combo in the 1750lb range. If I can get the power and torque to the track , watch out as it should be a screamer.

So thats the build . Will take photos and keep all updated as I go.

John
 

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Discussion Starter #2 (Edited)
Photos current Chassis

Some photos of the current A429 headed 545ci combo. Best of 8.0 at 167mph. 1880lbs with driver. 32.5x14x15 slicks. Ian jenkins chassis.
 

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IMO, The C4 will go on the 1st or 2nd pass:)I hope i'm wrong and good Luck. Thats a BADD ride:)
 

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Rick,

Maybe not now if it was in a heavy car probably but it only weighs 1,750 lbs.I for one hope the C-4 works good for him.I wasn't a believer in them but it has held up good in my car so far knock on wood.

Later Mark.
 

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Discussion Starter #7
WL,

But everyone has a glide , and to be different and keep things interesting it would be great to develop a C4. If it (C4) dosnt work , then I will go glide.
We have 10 National Open meetings per year , adding to that test and nostalgia days , I would be lucky to run more than 70 laps per year over a 7 month season. With meetings generally three weeks apart , pulling the trans each time is not too much of an issue.Not like some of you guys with 200-300 laps a year racing every weekend. This is to be an R & D year , and chase the championship the next.

John
 

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John, I'm all for being different (just ask anyone that knows me LOL!) but the reason for a 2 speed is the starting line gear ratio. Too much gear and you've got a race car that overworks the tire, skates around off the line and has not-so-good 60 ft's.......I've always been told that a car under 3K lbs works better with a 2 speed. IMHO

Rob
 

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Tranny

We have had a C4 in a 3540 lbs car and 1000 hps. Have run this for a couple of years with 0 troubles minus snapping a yoke in the tranny and breaking the tail shaft. This is a Mighty Might from Dynamic Racing that is rated at 1000 hp.

Trans brake at 4400 with 390 gears.

I know you will have much more power but the weight is to your advantage.
The C4 we used uses a planetary system and full roller torringtons.

Best of luck
Alan
 

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Discussion Starter #10
Rob,

I agree that too much first gear is going to be our issue, but it is a 4 link suspended car with no tyre size restrictions, I have some opportunity to move weight around in the car , and combined with the correct converter , controlled pinion speed thru manipulation of timing early ( pull a few degrees out early and add it back in later ) it may work. Also , 2.2 first gear is an option , all be it an expensive one.

John
 

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Discussion Starter #11
Xmas In June - Oooh Yeh

Hi all,

well Christmas came early for me. After going via New Zealand ( look it up ) my parts finally arrived ( Thanks Cliff and JKRE )

We had to have an unpacking party of the large crate at Speed Torque , master head porter. Ooh , studs and nuts - boring - Manifold interesting , more studs and nuts - boring - Danny Bee looks nice ,Ahh rocker covers are cool,- rockers , WW Engineering look strong but not shiny so a little boring - ATI balancer nice piece but its a balancer, - pistons 13.5cc dome starting to get interesting ( should give me 14.5:1 +) , - BME aluminium rods way cool ,-Bryant crank is so pretty and is gonna get at hiding at 8000+rpm , beautiful piece, - Kaase Boss9 heads even cooler and my head porter has run away to have some time by himself carrying one of them ,- can this get cooler?, yes as a lite( not very) C&C aluminium (Aluminum to some of you) comes out of the depths. Then some Crower rollers etc.

I am hoping for 1200hp on the dyno ( which is about 1000hp at the track ).

Here is some photos ( dont know how to make them display ). Old A429 Engine in the background.
 

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Discussion Starter #13 (Edited)
The C and C block got a de-bur , good clean and measure up over the weekend.
2.5" cam tunnel for roller cam bearings bored to size. Mains ready for a line hone down a couple of thou , and the sleaves are to be bored then a light hone now and final hone after engine mock up. It all went off to the machine shop this morning.

When it gets back we will dowel the intake manifold during mock up and the whole top end can go off to start the porting process.


John
 

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Discussion Starter #14
Well C and C block has been back from boreing( so pistons can fit to do a mock up ) for some time , bearings arrived , crank issues resolved and so I started the mock up on Saturday.

First the counterweights on the Bryant crank hit the sleaves. Oh well , out with the tools and grind away at the sleaves until its flush with the bottom of the block support. Put the crank back in , still a little tight , take away a bit of block and some more sleave. Perfect. Clean the block , blow it out , beautiful.

Put the bearings and crank back in , time for a rod and piston. You guessed it , the least of the work was the counterweight clearence , the rods need a 1.2" dia notch thru the sleave and the bore support/block.

Maybe I was a little nieve in thinking that an aftermarket block would fit a 4.5" throw crank and Aluminium rods without too much clearence issues. Wrong.

My standard 460 truck block and cheap cast Scat 4.5 crank went together like pie and cream , but when you start using serious part for serious engines everything needs checking , adjusting , blueprinting etc etc.

It really brings home to me the value of those quality engine builders out there. They do earn what they charge for their high end stuff. Its no a simple matter of bolting the right parts together , it making them work together where all the hours go.

Just a little insight into where I'm at , and Im loving every minute of it , under the guidance of mentors who know. I will keep plodding along with it.

Heads and manifold should be finished in a week or so , and with final flow figures we can order a cam.

The Boss 9 figures look good against other big heads like the Dart Big Chief's . My head porter thinks the engine should make a "bunch" of power even with our conservative starting cam range ( looking around [email protected] in the 750 lift range )

John
 

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Thats a nice piece. I've a soft spot for these cars dont know why I havent built one yet.

On the trans you may want to try a t400 with a 2.10 first gear. Reasonable hit on launch less rpm drop on the shifts and pretty much bullet proof.
 

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Discussion Starter #17 (Edited)
Got The Heads Back-Photos

Got the heads back today , and attached are a few photos.

Ended up with a reasonable gain across the board , 6% to 12% in the .400 to .800 range. The flow figures are in txt form because the file size was too large , but first figures( base) are heads without manifold as cast, second are with as cast manifold and heads with fill in port , and Mod 3 is after porting with manifold on and all at 25" , and the second figures are at 28" , nothing to write home about ( specially with the flows that some are getting out of them ) but it is not a max effort deal yet. Mod2 and Mod3 flow figures are with manifold bolted to head when on the bench. The % gain is between Mod2 and Mod3 , not the Base and Mod3. The manifold may not look much but it does work rather well.

0.100 to 0.800 total flows at 28" with the manifold bolted on are I= 2393cfm and E= 2175cfm. Ave balance 90% I to E.

It is still going to make a bunch of power.

John


Bruce,

we are going to see how violent it launches with the C6 at 2.46 first gear . If I cant tune the suspension to handle it on the hit , we will try taking a few degress out of it in first or fattening it up with a solinoid operated pill.

We are building a C4 to play with also , see if we can get it to live , and get a new 2.20 first gear cut.

If all this fails , I will join everyone else and throw a PG in it.

John
 

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Discussion Starter #19
Update

Just a quick update .

Springs and Ti retainers are here , gone with Manley Nextek 221456-16 , a compact 1.5 dia and will give me 450lbs on the seat for that heavy intake valve. I decided to make this engine spin safely to 8500rpm , may need to rev it up to show its full potential.

Block had to be clearanced again for the Z-Bar lifters as they fouled against the block on the cylinder wall side.

Getting ready for final mock up, build the sump , fit pumps etc, and then final hone and assembly.

I do hope this thing will make good power , as a chebbie competitor in the same class as me ( Modified Altered ) just went 950hp with his 572 on the same dyno I am going to.

Fingers crossed, John.
 

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Discussion Starter #20
Update with photos

Well we have been hard at work , clearanced the block and now to the bolt on's.

New two piece sup has been made , rocker covers milled and a light polish , starting on remount of the oil pump , fuel pump , and alternator to suit the short snout crank.

Then its a on the mill again to make up a new drive mandrel.

In the background of one of the engine photo's you will notice another Hemi , the Mopar type , with a new intake to suit 24 injectors for a twin turbo 526ci set for ProStreet duties.
 

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