1987RX7guy

iTrader: (3)

Mark- Has there ever been tests done with the STOCK fuel setup for the N/a's that showed how much HP they can REALLY handle whithout being at 85% duty cycle or leaning out??

I hear and read(sometimes say it myself) that the N/a fuel setup will handle 200-250hp with not mods(given it works 100% good). Where was this initially based off of?

Has this even been done for a TII? Is there a formula directly relating CC's to AFR's and then to HP?

Santiago

Icemark

I think Ted said that testing showed the stock injectors are good up to about 250HP.

But regardless, my comment was more towards the people that the third mod they do (after a cone filter and a cat back) is too bolt on bigger injectors.

Which in the case of a basicly stock Honda, will give you more HP, but in the case of a mechanically stock 13B, will actually lower the HP.

BlackRx7

well said Icemark, that said I really wouldn't even upgrade the injectors unless your running 12 psi + on the stock turbo or an upgraded turbo, right now I'm running my car with a large street port, intake, 2.5 full exhaust, and a walbro, not to mention all the gauges,. running the stock turbo with a ported wastegate, max boost I see is 7 psi, and the shocker is it runs THE Best on 87 octane!!! and it still is running rich!!!

although I just got back from the wed night drags, I ran 93 octane just for safteys sake and my car didn't idle as good with 93 and definalty didn't feel as fast with the 87, but hey this is the first time I made it back from the track this year without blowing the motor :p

BlackRx7

forgot to say I'm running the stock injectors

1987RX7guy

iTrader: (3)

Yeah I know but I was asking about the MYTH or possible misconception of them holding up to 250hp.

I will ask ReTed though. Hopefully he see's this and chimes in. If not its PM time

Thanks guys. Santiago

SnowmanSteiner

I agree mainly with what you said Icemark. But if you get at least a piggyback system when you upgrade injectors you can utilize them more. You can lean out the afr in low and mid range, and then bump it up when you start overboosting.

- Steiner

NZConvertible

For four 460cc/min injectors, if you use a figure of 8cc/min of fuel per flywheel kW and an 80% duty cycle you get a figure of 247hp.

That doesn't necessarily mean the NA fuel system can support 250hp. This is merely the appoximate amount of power the injectors can support. It doesn't mean the fuel pump or the ECU are up to the task.

1987RX7guy

iTrader: (3)

My main concern was with the MYTH...not truth(in theory) that the N/a system can hold up to that much HP.

Tii's are a whole separate ball game

Thanks guys.

Santiago

Icemark

There you go!