Guys

WI without methan ol makes tons of power....you need to tune it. I am not going to repeat what I have said before (look at hte link provided above), only to add that the #1 mistake that tuners make with water injection is NOT trust it and still run the same AFRs as they do without WI. The whole purpose of WI is to be able to run NA-like AFRs at full boost. Half the tuners will think you are crazy (or stupid) if oyu tell them that, but thorough, true scientific research reveals the former to be true. Ideal setup for super-high boost applciations: high WFR (water-fuel ratio) of near 30% (up to 50% has been done on ver yextreme applications), ideal AFR of 12.3-12.8 (assuming your CHTs are "in the green") and optimal timing. What is optimal timing? What ever allows you to get to 15-17 degrees peak ATDC (after TDC) without detonating. If oyu are detonating, then increase WFR, or add methanol. When you stop detonating, dial in a desired amount of safety margin; IMO that's taking off 2 degrees of timing across the board and add 2-3% of WFR and/or methanol. That's THE algorithm of tuning. Not just pick random methanol:water mixtures, have it come on at a constant rate after a certain boost point, and just tune till you don't hear any knock and get an acceptable number. This way you will never know of what your engine can truly do.

 

^+1
Very well said Gurgen.

 

Are you addicted to mods? I thought I was bad!

So what are you going to do for tires to hold all that torque? You will probably only get tires to last 1000 miles on that beast!

 

You dont necessarily need a Z specific kit..it just makes life easier. Buchur Racing EVO alky kit Take for example that kit for EVO's. It uses the factory intercooler sprayer tank, and is a 20 minute bolt on with no custom fabrication whatsoever. If somebody made a kit like that for the TT Z's out there, lots of money could be made just because of the simplicity of the install. I had that kit on my EVO 8 (before I got the Z) and made 365 awhp and 397 wtq (93 octane+100% meth) on the stock 16g turbo...before the kit was installed, I only made 315 awhp and 320 tq.......food for thought

 

yep alcy rocks! allows you to run the turbo at the very peak of its compressor efficiency map without having to worry about detonating. fyi YOU DO NOT NEED A CAR SPECIFIC KIT to run water or alcy. there are several universal kits out there. all they have is a water pump, reservoir, lines, injector, and electronic box user programmable to start spraying when the boost hits X psi.

 

So - how did it go? I'm interested in knowing how your headgasket held up - no one else seems to be having any luck at those hp levels.

 

Like I said before, a car specific kit is not needed at all.............HOWEVER.....if someone was smart enough, they would make one and sell the **** out of them because of the simplicity of the install.

 

^^^+1 agreed..

The Grand National guys use these systems A LOT and have tons of experience. Hell, those guys were raising boost to some pretty scary levels without even running intercoolers. GNT's never came with 'em so that's testament right there that, as Gurgen mentioned above, if these systems are tuned right can help yield some awesome numbers..

 

Im using a 295/18 drag radial on the back... which hookups well at 60 mph.. but with the new power soon to come, i might me changing to a 315 drag radial...

 

None of the above... just forged pistons and rods... the block is holding up very well... we took it apart afew weeks ago to see the wear on the engine and its actually holding up very well.... We are doing some other things to the crankshaft and the heads for some more power along with 25 psi of boost...

 

Just to avoid misinformation, 85 and earlier Turbo Buicks did not have intercoolers and are called hot air cars by the Buick people themselves to differentiate from the 86/87 Regals and 89 TTA's that DO have intercoolers. Those engines all have low compression(8.0:1), so they can run lots of boost. We (my brother and I) have a hot air motor in Chevy monza and we run 20 PSI of boost in a non intercooled car, for now. Once it's intercooled, we'll be looking at boost in the mid 20's.

 

I've heard some one might try W/M injection with a TT on a G/350Z with out an intercooler

 

It's very effective W/O in intetcooler, but I wouldn't want to be expermenting i n a 10.3:1 motor. For a very long time that was considered way past what is acceptable for FI. Of course times do change and knowledge does progress. I'd be interested in hearing how this works out.

 

Cool bro, thanks for clarifying that. I was under the impression they all had no intercoolers, or if so very inefficient ones..

If you're already running 20 psi non-intercooled I would assume the turbo is very efficient, so with the addition of an intercooler why not push for the 30's?? Insane I know but hell, why not??

 

SoFI_G,
Matter of fact, since you have experience running non-intercooled what would you consider a safe efficiency range to run this way with and w/o water injection, say at 12-15 psi? 72%? 75%? 78%?