CHEVY V-6 CONVERSION TIPS & PRICE LIST1st gen Mazda RX-7s
V-6 specific frequently asked questions....
...What engines can I use?
Most any 90 degree Chevy V-6 will work. The carbureted models make for an easier conversion, but TBI (throttle body injected) engines can be used.
...Will the Chevy V-6 fit under my hood?
Yes, with the proper attention to intake manifold and air cleaner selection. Stock type manifolds that have an EGR valve will not fit w/o hood modification.
The shorter non-EGR manifolds and 4bbl carbs require a drop base air cleaner, and may require trimming out the inner hood brace in the area of the air cleaner, but will fit under the hood.
...What modifications are required ?
The biggest mod is to the oil pan, which is done to give the steering linkage room to operate (fortunately, this mod. to your oil pan is included in the price of our Basic kits).
Another modification we have begun using is "reversing" the stock RX-7 engine crossmember. Easily done by removing 6 bolts, this moves the engine mounting points closer to what's needed, and allows us to build much nicer looking adapter brackets.
...Can I use my stock RX-7 radiator?
Yes. Many customers are using the short water pump in conjunction with the stock RX-7 radiator, fan, and shroud.
The radiator still has to be relocated all the way forward to a vertical position for the long water pump conversions.
Air-conditioned conversions may require using our HD aluminum radiator. If you do choose to try the stock radiator and AC, plumbing the RX-7's oil cooler into the V-6 will improve your odds of success.
...Do I have to use an electric fan?
No. The stock RX-7 clutch fan can be modified to fit and is recommended for use with the Chevy conversions V-6. The stock RX-7 fan shroud can be reused as well (short water pump only).
...How fast will my car be?
Quickness of the car will be greatly improved, as the V-6 has quite a bit more torque than that of the rotary engine. Overall top speed depends on the transmission selection and the RPM range of the engine. Expect a stock V-6 (with good tires) to produce 14-15 sec. 1/4 mi times.
...Are there any special requirememts?
Because of the high cost of aftermarket distributors for the 90 degree V-6, we offer special kits that allow for use of the larger dia. HEI as well. The larger dia. "HEI" units require the "HEI" style Basic Kit, which positions the engine 3/4" farther forward than the STD. V-6 position.
A "short" V-8 water pump (pre-'68) and pulley set is recommended. Double groove crankshaft and water pump pulleys are required to drive the P/S pump and/or the A/C compressor.
CHEVY V-6 into MAZDA RX-7
1st gen. '79-'85
BASIC KIT includes:
(2) Engine Side Brackets
Transmission Bracket (specify type)
and Oil Pan modifications that clear the steering.
4.3 litre V-6 - exchange oil pan required...........405.00
4.3 litre V-6 HEI - allows use of the big HEI dist.
exchange oil pan required...........................415.00
BASIC KIT + DRIVESHAFT
Special package price...............................710.00
ALUMINUM RADIATOR KIT,
22x19x3 HD radiator, good for 480 HP.
HD Radiator and brackets only - Chevy outlets.......465.00
Aluminum side panel seals for radiator (2)...........45.00
LO-MOUNT ALTERNATOR BRACKET
Brackets for mounting smaller RX-7 Alternator
Mitsubishi or Hitachi (includes aluminum adjuster)...60.00
P/S PUMP BRACKET Mounts on left side
Double pulleys required..............................60.00
CLUTCH MASTER CYLINDER
7/8" bore for use with Mazda or pull style slave.....90.00
1" bore for use with T-56 stock slave................90.00
STOCK MAZDA CLUTCH SLAVE CYL. MOUNTING BRACKET
provides a bolt-on solution to mounting the stock
RX-7 slave cylinder to the Chevrolet bell housing....55.00
TACHOMETER RE-CALIBRATION............65.00 + return shipping
DRIVESHAFT Custom Balanced Shaft with u-joints
(does not include transmission output slip yoke)
Specify transmission and companion flange type
Steel(new components)...............................335.00
Aluminum (new components)...........................455.00
Slip Yoke- 1-1/2"x27 spline (T-350 / 2004R)..........80.00
Slip Yoke- 1-7/8"x32 spline (T-400 / T-56)..........105.00
SOLID MOTOR MOUNT SET:
Aluminum inserts to replace the factory style rubber
mounts (for competition applications)...............$40.00/pair
TRANSMISSION COOLER attaches to radiator core,
5"x14"x3/4" 4 pass...................................45.00
...Click Here for Ordering Information...
Commonly available parts recommended to be used with our kits...
Transmission mount - rubber......................NAPA PN# 620-1024
Upper radiator hose (aluminum radiator)..........NAPA PN# 7922
Lower radiator hose (aluminum radiator)..........NAPA PN# 7286
Alternator fan Belt (our Mazda bracket)..........NAPA PN# 7425
A 2nd GEN. GETTING AN INJECTED 4.3 V-6
note the stock radiator and fan shroud, even uses the RX-7 clutch fan.
our kits are jig welded and bolt right in....
...no cutting or welding required !!!
TRANSMISSION OPTIONS
Turbo-350 Turbo-400 200-4R 700R-4
BW/Tremec T-5 5spd BW/Tremec T-56 6 spd.
