My Ass Kicking Big Bore Tin Can (Re)Build

[Hemi~C~ 19]

So now that I finally have the 392ci bullet done and running strong in the Magnum its time to turn my attention to rebuilding the tin can that has been sitting on an engine stand in the garage for the last 2 years.

The aim is to put together a competitive package for the Pro and Modified MSHS classes that can also be driven every day if desired without any of the boost related side effects that I no longer wish to live with. At a point where I need something I can tune myself, is fun on the street and flexible enough to run on pump gas when needed. Yes, I am a glutton for punishment when it comes to wanting to drive whatever it is I race with daily...but it is what it is until I get a race car.

The general plan: Big bore, big stroke and a bit of NAWZ

Initial thoughts:

Power band: 3500-6500 rpm

Bore x Stroke: 4.185 x 4.250

CR: 11.5 - 12.0 to 1

Cam: 24X/25X .625 @ 115

Thitek heads - 2.20 / 1.65 dual spring

Arrington roller rockers

Matched drag pak intake

Direct port nitrous set up for 300 shot

3600 TC

3.55 gear

Weight: 4000lb w/driver

Lots to do and decide as we go but this is the fun part...finalizing piston design, CR, heads/cam specs etc. I am shooting for 750hp or so NA and 1050 on the juice. I really like what Tony and BES boys have been doing in the Engine Master Challenge series so you know who going to get a call to help decide final specs. Expect a call Bruce

This will be built in the garage, tuned on the street and tested at the track so stay tuned for the updates.

The K1 4.250 crank just arrived today so now its real.

I will reuse these bad ass Oliver billet rods

The block will be going out to get cleaned up, have the iron liners rockwell tested and if they pass spec boring it out to 4.185. It took a while, but I found a machine shop that does quality work for the F1 crowd. Hopefully they can handle a simple bore/hone with deck plate.

topped off by one of these...already ported by BES

Its all going in this!

[Don@A2Speed 13]

Should haul ass Chris

[Goehner 240]

Kick ass.

[no1special 36]

Nice!!!!! One thing you'll need is a lot more camshaft though. That motor is very similar to mine. I think something more in the mid 250s on the intake with 10 degrees more on the exhaust. Should be a beast!

I wish I could find some Arrington roller rockers for my motor! You already have a set??

[sharkcohen 60]

Love it.

[Hemi~C~ 19]

Nice!!!!! One thing you'll need is a lot more camshaft though. That motor is very similar to mine. I think something more in the mid 250s on the intake with 10 degrees more on the exhaust. Should be a beast!

I wish I could find some Arrington roller rockers for my motor! You already have a set??

Yeah agree the motor will likely want more camshaft than i am willing to live with on the street but it is amazing how much air these heads move without massive cam specs.

Chris

[concussion 28]

This should be fantastic

[Jerseyboy 61]

I'd err on the lower side for compression. That big bore won't like alot of timing with pump fuel and high compression. I personally prefer boost for a daily driver but I prefer to walk softly and carry a big stick....

[Hemi~C~ 19]

I'd err on the lower side for compression. That big bore won't like alot of timing with pump fuel and high compression. I personally prefer boost for a daily driver but I prefer to walk softly and carry a big stick....

Rgr on the big bore vs timing vs CR. Thanks for the insights. Direct port water/meth should help extend the tuning window a bit on pump gas and of course we will be using race gas at the track. The DP manifold design suites itself to having both DP nitrous on top and the w/m underneath the runners.

I can certainly appreciate the walk softly and carrying a big stick approach. Been there, but this time I am looking to maximize all aspects within an NA package and the constraints of being fun to drive on the street. I will leave boost for the eventual race car as my experience has been that no matter how refined the tune, eventually the non linear throttle and other minor artifacts will have me driving the car like a soccer mom 90% of the time. Just miss that snappy throttle response, linear power delivery and the ability to go WOT on the street without wrapping the car around a telephone pole The Nitrous gives me the ability to go from Dr. Jekyll to Mr. Hyde, and tune on my own once we have the NA tune nailed.

Hope that sort of makes sense to those that have been down this road.

Chris

[no1special 36]

Rgr on the big bore vs timing vs CR. Thanks for the insights. Direct port water/meth should help extend the tuning window a bit on pump gas and of course we will be using race gas at the track. The DP manifold design suites itself to having both DP nitrous on top and the w/m underneath the runners.

I can certainly appreciate the walk softly and carrying a big stick approach. Been there, but this time I am looking to maximize all aspects within an NA package and the constraints of being fun to drive on the street. I will leave boost for the eventual race car as my experience has been that no matter how refined the tune, eventually the non linear throttle and other minor artifacts will have me driving the car like a soccer mom 90% of the time. Just miss that snappy throttle response, linear power delivery and the ability to go WOT on the street without wrapping the car around a telephone pole The Nitrous gives me the ability to go from Dr. Jekyll to Mr. Hyde, and tune on my own once we have the NA tune nailed.

Hope that sort of makes sense to those that have been down this road.

Chris

Yes it does!

[InferAl 5]

Good Luck Chris looking forward to the updates

[Hemi~C~ 19]

Thanks Al, your build has always been a bit of inspiration and I am just now getting around to executing it.

Chris

[novawagonmaster 62]

Sounds like fun, Chris.

You know how I feel...

... N/A FTMFW!

[jettech104 27]

Look forward to the updates on this build. Sounds like you have a solid plan for this build.

[hemiphil 1]

All the best with the build Chris! Looking forward to you rejoining the MSHS races again next year.

[robsrt 58]

Looking forward to seeing you back at it Chris.