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4 minute(s) of a 136 minute read
5-25-2011
Have not had a chance to get back to the dyno for quite some time now. Too much going on in the shop. I did build a new exhaust system that maybe gained power and leaned out the tune.
I also am almost done with the new slide throttle setup. So hopefully more power numbers will be soon!
Total cost for a engine identical to mine which would have the following parts-
Circuit Port on intake and n/a race exhaust port
Fully balanced rotating assembly
9.7:1 n/a rotors
Clearancing the rotors
Ceramic apex seals
3 new rotor housings
Semi p-port machine work to 3 housings
Race rotor bearings
All new staionary gear bearings
Mazdaspeed drysump front cover
all suction tubes modified for 20b
Oil modifications
Coolant modifications
Labor to tear down, clean, prep, blueprint and assemble the short block
$15,500 total (doesnt include the stock 20b longblock due to constant price changes on JDM engines)
We are working on a E-tech series that is much cheaper-
Parts that differ-
Carbon apex seals
Keep OEM housings
Uses a external 3 stage drysump system
$8,800 total (without 20b longblock)
Both capable of same power. Just the carbon apex seal engine will need refreshed after a couple seasons of racing. (replace carbon seals)
5-27-2011
Here are some updates that have been done over the months--
Removed the windshield and fabricated some a-pillar plates
Had some rotor hats cnc machined to adapt the nextel cup/alms braking system to the Rx-7. These are monoblock, radial mount, titanium insert staggered piston calipers. And Performance Fiction dimpled rotors with full floating mounting.
Remade the rear exhaust system, to shed weight and possibly free up some more horsepower. This system was 60lbs lighter once complete!
Went to some new wheels, enkei Rp-f1 18x10.5 on all four corners. Then wrapped in hoosier R6's. 285 up front and 315 in the rear. These dropped over 34lbs off the car total.
Fabricated the fuel cell and drysump enclosures to meet the SCCA and NASA rules, and finally mounted the ATL drybreak system. Also made the drysump tank vent tubes with built in catch can.
Some body shots with the new revisions-
