New PI 8 thread heads and cams combo

New PI heads and MHS cams combo $1,895.00 USD Upgrade springs to Stage 2 $200.00 USD Upgrade valves to stainless steel $200.00 USD Drill front cover bolts for 5.4/Windsor swap $40.00 USD Include a set of new head bolts $40.00 USD Include new PI intake manifold $180.00 USD Include NPI to PI swap kit for 4.6 car $110.00 USD

Brand new pair of non ported FRPP PI heads with your choice of MHS cams, and a full MHS head swap gasket kit included.  These are newer style 8 thread Romeo castings and all parts are brand new.  Cams are degreed and TFS adjustable crank gears are included.  Your choice of stock or aftermarket valve springs and valves.  Your choice of 4.6 or 5.4 gaskets, also we can drill and tap the front cover bolts for the larger Windsor bolts if desired. 

Kit includes:

Mike at Turbocharged Innovation just went 11.17 at 129MPH with a crappy 1.88 60ft and 102MPH in the 1/8 in 85 degree weather.

Here is a video of this run.

Car is a 3680lb 99-04 style Mustang with the prototype original heads (which would end as a Stage 1 with a 0.5mm valve and Comp high load spring option), stock PI cams and intake, stock auto, stock 3.27 rear, aftermarket 3000 stall converter, and his turbo setup.  The rest of the car is amazingly stock.

With a restall of the converter so it can be in boost off the line and some weight savings high 10's at over 130MPH should be realized.  Then I might be able to talk him into some cams finally.........

UPDATE - Ryan just went 10.18@139MPH with our 600RWHP combo in a full weight vehicle!

I have an amazing supply of Romeo cores for dirt cheap for hopefully the next few years that have never had a reject.  I pass that pricing on to you.

With a 4.6 sized engine 210CFM will support approximately ~7500RPM naturally aspirated before more CFM even needs to be considered according to the established "calculators".  You need a real intake manifold to achieve this as well as the stock plastic intake manifold won't allow much over 200CFM and 7000RPM anyways.

Our heads are designed for stock manifolds, or headers with 1 5/8" tubes since that is what most of you use.  Most flow numbers are done with 1 3/4" tubes and the ports are taken to that larger size to "fluff" a higher reading.  When that larger port gets used on a typical 1 5/8" header the flow typically drops lower than what ours have as you now have a serious mismatch in the worse possible location.  1 5/8" headers are used on 8000+RPM 2V engines, you need to pull some serious RPM before even considering 1 3/4" headers. 

28 inches and stock bore diameter of 3.55"  Larger bore diameters will flow slightly higher numbers.  Some of the other heads out there are flowed at the stock diameter and some at larger diameters, be sure to check when comparing.

Quite simply that is not where the restrictions are!  The restriction on the intake is in the middle of the port and the exhaust is in the bowl and the roof by the guide. 

Chamber shrouding primarily from the slightly larger valves.  These are small bore engines with small compact combustion chambers.  Once the valve moves far enough away from the seat the larger valve itself finally becomes less of a restriction rather than a greater restriction.  The flow charts are also done with a stock bore diameter, a larger bore diameter will favor the larger valves.

Powdered metal works good for valve seat material, and it works decent enough for valve guides.  However all it takes is one PTV issue and that powdered guide fractures easily.  Then it becomes a tiny fragmentary grenade inside your motor.  I have seen enough motors damaged from cracked and fragmented powdered guides to where I don't use them.  Bronze guides also absorb heat from the valve better and transfer to the aluminum head casting better.  Bronze is a much better conductor of heat than powdered metal.

We just got back one of the first sets of heads I had ever done.  It survived 30,000 miles of abuse via 20-25lbs of turbo boost.  The guides had increased clearance by 0.002"  Since we install the guides at such a tighter spec than OEM, these heads came back still within OEM specs (but at the high end)  The stock powdered guides that I have removed are usually 0.010" larger under similar conditions.

It is done on a CBN Rottler.  You need a super smooth finish for the MLS gaskets and many shops do not have the correct equipment for this.

All PI heads now come with 5 angle plus radius valve jobs.

$150 once they arrive to me.  I will send your cores back to you ported.  I do not swap them for another set unless you desire that (like Romeo and Windsor exchanges - we are always looking for good Windsor cores)

Yes we do that now too...............