fendamonky

iTrader: (6)

Who is doing your mapping? I'm surprised that the person writing your maps says it's not safe to run your car over 6krpms... seems a bit off to me.

Where about in the UK are you?


iirc 1300cc injectors are really just 850cc injectors which have been bored out, so they will still fit in the stock secondary fuel rail. I'm running 4x 850cc injectors and made 340rwhp at 1.2 bar on a DynoDynamics brand dyno.

fwiw I had my mapping done by Max and Geff at Re:worx in Portsmouth, I'm quiet happy with my results (even though the power figures look smaller then my American brothers..). The pull at that level is just mental, I've easily smoked every TVR which wanted to play on the dual carriageways, walked away from a Ferarri 456M and run even with the 911s..

tiger18

iTrader: (1)

hi, im in leeds up north .The car was tunned by Pip Gardner at WGT developments. His words were , the car is hitting 90% injector duty at just over 6000rpm your going to need some fuel mods. He said i wouldnt go over 6000 rpm to be on the safe side.

ive read that the bored out 1300cc injectors arent safe and many a engine has been blown with them sticking???

Dudemaaanownsanrx7

iTrader: (23)

Personally I wouldn't go for 1200 or 1300 bored out injectors. They are expensive for what you get, eventually you will need more fuel and end up selling them, they have a higher failure rate especially if using the 15 year old injectors originally on the car. I've personally had a primary injector just stop working for no known reason, I can't imagine the hassle of that happening to a bored out secondary.

Really for your current goals an aftermarket fuel pump and a rewire will get you where you need to be fuel wise. If you need a little more then get an aftermarket regulator and turn the base pressure up a bit. 550/850 @ 50 PSI base pressure will flow 100cc more then 850/850 @40 psi base.

For my power levels I should be running 850/1680's, but because I'm running dual pumps, 550/1680 and slightly higher base pressure the highest duty cycle I've seen is 80 running 23 psi with a t70 and ported engine.

fendamonky

iTrader: (6)

Ok, if Pip's got you then you're in good hands. I was worried that perhaps you'd run into a boy-racer who claimed to tune... I find it odd that Pip would limit your rpms, vice just turning down the boost a bit in order to make use of your full rpm range.

Have you re-wired your fuel pump? If I remember correctly I was able to run my car at about .85 bar with the stock fuel system, I was hitting HIGH duty cycles though. I only did that for a short time before swapping out the whole fuel system (Bosch 044, Aeromotive FPR, 4x 850's) along with uprated turbos (BNRs), uprated clutch, all kinds of other goodies and upping the boost. I wouldn't want to go much over .85 bar while using the stock fueling..

grimple1

iTrader: (1)

1300s are generally side feeds that have been modified by rc engineering. side feed 850s can fit into the primary if the rail is milled down (I think 1/8th - search this to double check).


http://www.rceng.com/


the supra pump is from the MKIV. Denso. You should have the correct one if it's from a 1997.


It's about even in my book. supra vs walb. 255lph. I run a walboro but a lot of others run the supra. by the time either of them run out of flow, you'll have to double them both ~ 500whp. There's a special math formula to determine it.

grimple1

iTrader: (1)

found it.


http://www.banzai-racing.com/how_to/...sion_chart.jpg

KKMpunkrock2011

iTrader: (5)

there was a calculator somewhere (maybe in the FAQ) that if you inputed your injector sizes and wheel horsepower it would tell you approximate injector duty cycle at base fuel pressure, this also assumed you rewired the stock fuel pump.