<TABLE> <S> <C>
<PAGE>
<ARTICLE> 5
<LEGEND>
THIS SCHEDULE CONTAINS SUMMARY FINANCIAL INFORMATION EXTRACTED FROM CLEAN ENERGY
COMBUSTION SYSTEMS, INC.' CONSOLIDATED BALANCE SHEET AT JUNE 30, 2000, AND CLEAN
ENERGY COMBUSTION SYSTEMS, INC.' CONSOLIDATED STATEMENT OF LOSS FOR THE
SIX-MONTH PERIOD ENDED JUNE 30, 2000, AND IS QUALIFIED IN ITS ENTIRETY BY
REFERENCE TO SUCH FINANCIAL STATEMENTS.
</LEGEND>
<S> <C>
<PERIOD-TYPE> 6-MOS
<FISCAL-YEAR-END> DEC-31-2000
<PERIOD-START> JAN-01-2000
<PERIOD-END> JUN-30-2000
<CASH> 0
<SECURITIES> 0
<RECEIVABLES> 20,186
<ALLOWANCES> 0
<INVENTORY> 0
<CURRENT-ASSETS> 71,377
<PP&E> 86,479
<DEPRECIATION> (20,375)
<TOTAL-ASSETS> 156,512
<CURRENT-LIABILITIES> 692,842
<BONDS> 0
0
251
<COMMON> 964
<OTHER-SE> 0
<TOTAL-LIABILITY-AND-EQUITY> 156,512
<SALES> 0
<TOTAL-REVENUES> 0
<CGS> 0
<TOTAL-COSTS> (124,058)
<OTHER-EXPENSES> (214,569)
<LOSS-PROVISION> 0
<INTEREST-EXPENSE> 0
<INCOME-PRETAX> (214,569)
<INCOME-TAX> 0
<INCOME-CONTINUING> (214,569)
<DISCONTINUED> 0
<EXTRAORDINARY> 0
<CHANGES> 0
<NET-INCOME> (214,569)
<EPS-BASIC> (0.02)
<EPS-DILUTED> (0.02)
</TABLE>