turbotuner20v

I'm looking to add a small dry shot of nitrous before my blower to cool down the charge temps and maybe pick up a little power. I'd like to run it without a tune adjustment if possible to limit the complexity, but wasn't sure how many points a shot like that would lean out the a/f ratio.

I'm going to be running an F1a on a 365ci motor making ~20psi and I'd like to put the dry jet in the intake filter before the blower inlet. The car will be on e85 (possibly with meth injection, but this may be used as an alternative vs. an addition)

good2go

Depends on how much power you are making. If you are making really big power it won't change that much. The good thing is that E85 is harder to get to detonate. The question though is, do you really need to cool it off. That's another thing that E85 helps with.

turbotuner20v

I'm hoping to make around 900whp w/o nitrous. I'd like to get some power out of the nitrous too, just thinking of the cooling effect running it through the blower/intercooler since I'm running the relatively small original procharger intercooler that might be out of it's efficiency range at the power/boost levels I'm getting into... plus if I'm spinning the f1a at max rpm. I heard somewhere that the shot doubles on FI, but I've also heard a small shot won't do much at a high HP level.

turbotuner20v

At this power level, even on a small shot, it seems like really good bang for the buck. There's not much else out there to boost power w/o drastically changing the setup or swapping blowers.

http://www.dynotunenitrous.com/store...?idproduct=118

03EBZ06

Nice, thats what I call an intake cooler.
JUST a VERY BROAD calc, but:

BFSC * HP = FLOW
0.6 * 900 = 540 lbs/hr
0.6 * 35 = 21 lb/hr

21/561 = 3.7%

turbotuner20v

Cool, so maybe 10.8 to 11.2?

03EBZ06

was just thinking that charge is going to be cooled significantly compared to normal.

Just another wag, but going from 1000 to 7000ft dens alt based on temp alone, might be a 15% change in power. If starting 140F intake temp down to 75F w/shot, you might be looking at some hp increase from just the cooling. I know that was orig question, but I was too focused on just the shot.

So maybe, another 1% per 5F change?

turbotuner20v

hmm.. if that was the case, it could bump the A/F up into the mid 12's from 10.8... that seems like alot though.

it's hard to believe a 35 dry shot could have such an impact on fueling, but I guess it could. If it's that big of a swing, I'd have to scrap the dry idea and look at a wet setup probably... I think I could pull enough fuel for a small shot off the regulator.

5.0 LsX

iTrader: (7)

i would say just run a wet shot seperatly for added hp, dont think you will have a problem running e85 @ 20lbs, and its not working the head unit too hard.

i would be curious to see what the derastic temp changes from spraying into the blower would do to the headunit in the long run...

turbotuner20v

Yea, I asked procharger and they weren't sure since its not typical. The biggest concern was super cooling a heat soaked blower.

redtan

iTrader: (5)

If you're running meth and e85 I don't really see the point of a small nitrous shot for the cooling aspect. Now if you were running a nitrous shot for the power (with the added benefit of extra cooling) ok, but you already have the meth for that very reason.

turbotuner20v

Well, nitrous would be a power adder by itself, meth is just cooling the intake charge w/ high octane fuel essentially, I'd have to tune for it (add timing) to take advantage. I would like to get some power from the nitrous shot, I just wasn't sure how realistic it was to expect a noticeable increase from a dry 35 shot. The meth is left over from before I went e85, so I'm 50/50 on keeping it.