dry or wet nitrous on your TPI vette?

grumpyvette

Administrator
Staff member
a DRY system is a VERY BAD idea on a 1985,-1986 vettes if you relie on the stock injectors and CPU too supply the extra fuel at the correct ratio and at the correct time and your ASKING for burnt pistons
NEVER RUN A DRY NITROUS SYSTEM ON A TPI ENGINE THE COMPUTER CAN<T SUPPLY THE CHANGE IN REQUIRED FUEL FLOW DEPENDABLY
Dry =your engines Injectors add fuel as the oxyegen sensors see the fuel ratio change
Wet = your Nitrous spray Nozzles add fuel in a fog, of fuel with the nitrous ,
WET SYSTEMS ALMOST ALWAYS WORK BETTER AND HAVE FEWER PARTS SELF DESTRUCT


READ THIS ALSO

viewtopic.php?f=55&t=900&p=1461#p1461

http://www.gmtips.com/3rd-degree/dox/ti ... t/port.htm

get a WET nitrous system with a seperate spray bar, youll have far less potential problems, similar to these ASK QUESTIONS ABOUT THE EXACT KIT REQUIRED

http://store.summitracing.com/partdetail.asp?autofilter=1&part=NOS-05131NOS&N=700+115&autoview=sku

http://store.summitracing.com/partdetail.asp?autofilter=1&part=NOS-05151NOS&N=700+115&autoview=sku


IF your thinking a DRY SYSTEM worked fine on my C-5 or other newer car, your correct, IM sure most of those cars had a computer that was several generations faster than the 1985-86 corvette and with more pulse width available, the STOCK 1985 has a very slow computer and injectors and fuel pump with capacity that won,t allow a large increase in flow, the stock fuel pump maxs out at about 42 psi

http://home.earthlink.net/~gellett/7165swap.htm

http://www.eecis.udel.edu/~davis/z28/ecm_swap/

http://www.chevythunder.com/1226870_ecm.htm

http://home.earthlink.net/~gellett/tpi.htm

please believe me, I own a 1985, and the STOCK computer is dead slow, and won,t support a dry system for long before it frys parts, upgrade to the newer chips and you can get by

"One major problem when tuning an EPROM for this ECM is that the diagnostic data (ALDL) is transmitted at only 160 BAUD!. This works out to about a 1.25 second interval between the 25 Bytes of data. I have only been able to get about 6 to 8 data samples during a Quarter-Mile DragStrip run which you can imagine does not provide much feedback for tuning. (sample data are at the bottom of the page in PDF format)
The ECM that came in 1986-1989 TPI Fbody's and Vettes is a series 1227165 (165). The ALDL data rate in this model can supply diagnostic data at 8192 BAUD. The (expanded) data stream of 64 Bytes cycles through every 62.5 milliseconds (16 per second) at this BAUD rate"

Edlebrock_tpi_intake_2.jpg


Edlebrock_tpi_intake_1.jpg


runner_gasket.jpg



be aware that the lower runner gasket is not interchangeable between the drivers and pass sides of the engine on a tpi and if installed incorrectly that results in hard starts a big vacuum leak and an engine that won,t idle
 
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