ajrothm

Congrats Neal! Glad it survived the mile... The mile racing is a whole different world.... 10x harder to go fast and keep engines together then 1/2 mile racing.

I'm questioning your IATs. They seem extremely high...granted being wide open for 25 seconds will definitely cause high IAT but... Yours is extreme.

189* in the top of 4th is crazy on meth.. I have an F1R with a 4.25/8" pulley combo and the highest IAT I have ever seen was 140* and that was in 5th at 165 mph..

Now in 3rd (1:1 in an auto) at 163 mph, 7200 RPM's, seeing 23 psi I'll see 128* IAT, starting at 90* IAT on an 80* ambient temp.

Maybe my nozzles are closer to the IAT sensor or something but.. I can't imagine 190-200* IATs on meth..


Hell I see 230* IAT on my turbo bike with air to air IC and no meth on 1 mile pulls at 18 psi, it's on C16 tho..

Neil B

I'm going to go through the system again. The nozzles are about 5-6 inches in front of the IAT sensor. AFRs dropped from low-11's on 50/50 to high 9's/low 10's on 100% meth before I pulled some fuel. So it's definitely flowing some meth.

Proace4

I have an older "cooling mist" kit that I used on my car and even though I ran M1 on it, and the AFR was definitely safe, no knock, or anything. I would see my IAT's rising. I talked to Brett about it a little and decided to switch to an Alky control kit, and I don't know if it was the style of dispensers/nozzles not misting correctly or what, but the Alky kit drops my IAT's. At TI they would start out at 90-95* and drop to 75* at the hit, and then climb up to 100* by the end of pull in 4th around 163. Just an idea...

I still use the cooling mist kit, just have a smaller nozzle lower in the intake tube btw.

Pekka_Perkeles

Indeed.

Just for a reference; here is a link what can be done with built aluminium LS2 block & YSi; well past 200 mph (+225 actually). Just scroll down from the link.

https://www.corvetteforum.com/forums...different.html

Neil B

Here is a video I put together from the event:

gotjuice?

Nice video.

On my 215mph run, I was at 129 IAT, 7050rpm in 5th gear. It was also a lot cooler that day. I spray meth and N2O.

Neil B

It was great to meet you. Thanks for all of the help and advice. Do you spray the N2O pre-IAT?

Neil B

Added some new Fly-By footage at :51 and 1:41 in the video below.

4DRUSH

Not allowed to run A/W intercoolers ?

gotjuice?

No, Right before the throttle body.

gotjuice?

Yes, You can run A/W intercoolers. The CTSV's run that, They run very hot. That is probably due to the blower design.

I also run 100% meth. 10 and 15 nozzle.

Neil B

Your meth nozzles are right on top of the IAT sensor. Might be something to that. Julio is right in my backyard here in Tampa, so I will reach out to him to help get me dialed in.

StuntHeavy

Wouldn't having the w/m injector close to the IAT kind of cause a false reading?

Ya'll surely know more than I do, I'm just here to read and learn

Pekka_Perkeles

Maybe, but that's something the tuner takes care of. It's all in the logs (with and without meth). Some tuner might propose changing IAT sensor location, but without logs it's hard to say anything.

Aren't well all? :-)

4DRUSH

Guess that's the way to go for street & occasional track event

if track only, A/W is the way to go

won't be that hard to switch back & forth either = no worries of meth failure

gotjuice?

The charge tube was used when I purchased it. I think it came this way from ECS. Julio really did not want me to run duel nozzles when I talked to him. I thought I needed it, So I kept both nozzles. I really think the N2O is a must for the mile runs.

Neil B

After taking my charge pipe off and watching the spray pattern of the nozzles, your IAT sensor is directly in line with the flow of liquid meth. My big 625 nozzle sprays enough for the atomized mist to bounce off the opposite wall of the charge pipe and turn back into liquid state. However, this might not be the case under boost.

Smoove

Nice. Blower/spray? How much power and what gearing to go 215? Still a T56?(whoope, it's a C6 so maybe a 6060 car)

Curious of your power level at 15 psi and also gearing, unless I missed that already.

COngrats to both of you for making the event!

Neil B

My car dyno'd 770rwhp on 12 psi. I went with a smaller pulley awhile back and the car was making 15-17psi at the event. I figure around low-800's with full timing. I only had 11-12 degrees timing on the top end for the 196 mph pass. I ran the stock MN6 trans with 3.73 gearing and a 28" tire. 6,600 rpm through the traps in 5th gear. Most of the 200+ mph cars had 1,000+ hp and multiple power adders with A/W intercooling.

Smoove

Gotcha. Would it be safe to assume that, no head wind,...lower IAT's,...200mph woulda been hit? Math wise, for years, I always figured 800rwhp in a Corvette would get there. Looks like you're right there.