asiancaucasian

So... three weeks ago I blew up my Lindsey Racing Super 75/8 at the track. Hotside decided to just let go.

Instead of just replacing with the same one, I decided on a slight "downgrade" of sorts and went with a Super 61/8 for a bit better spoolup and added a LR dual port wastegate as well.

Here's the results from a "Heartbreaker" Dyno Dynamics today!

hp18racer

Very nice!

r1ce

whats done to your car? just the things listed in your sig?

asiancaucasian

Pretty much.

LR MAF, custom tuning, 3 bar fpr, 55# injectors, LR Super 61/8, LR Dual Port Wastegate, Magnacore Ignition wires, Meth Injection, Fabspeed Catbypass, SFR Catback, Spec Stage 2 Clutch Kit. Probably some other random junk I'm forgetting as well.

alxdgr8

413whp on 55# injectors? 93oct? How much boost?
Uncorrected?

IanM

Aaron -
Those are fantastic numbers. I had my car on the dyno last year, and we played around with meth injection. It sure helps make power even if you don't touch the boost, due to the cooling effect. Turn up the boost and the sky seems to be the limit. A lot cheaper than a tank of race gas.

Could you provide some info about your meth kit, and maybe some photos? Where is your tank? How big is it? Are you running straight meth, or a mix w/ water? What size nozzle, and where is it positioned in the intake? How long does a tank of methanol last when you're on the track?

333pg333

So does that equate to 19.3 horses at the wheel per p.s.i.? That seems to be more than what is generally assumed. Was this in 'shootout' mode perhaps?

Nice numbers either way. Must be quick!

minho78

All I can say is uawwwwwwwwwwwwwwwwwwwwwwwwww. Is that RWHP?

V2Rocket

nice AFR and torque, over 300 ftlb from like 4000rpm up...jealous.

at what point does your meth activate? i see a few points where your afr drops below 11:1, certainly not a bad thing but just curious

Rogue_Ant

As I understand it, the hp / psi number is a ratio of hp gained over NA... Or a ratio including total air pressure if you wanted.

So if you consider that NA the engine would make ~130rwhp, then the amount of hp gained from boost is 413-130 = 283.
And 283 / 21.2psi = ~13.3hp / psi of boost.

Or if you use the total air pressure (boost + atmospheric), then use the total hp number:
413 / (21.2 + 13.3) = 12hp / psi of air pressure.

(13.3psi is roughly atmospheric pressure in Calgary)

Either way, the numbers seem pretty in-line with accepted standards.

333pg333

Ahh, thanks for that. I hadn't thought of it being over and above an n/a figure. That makes more sense. None of us down here have done a dyno to 21.5psi so I can't speak from experience of that sort of boost level just yet. Sean / JET951 got 275whp on a similar dyno at 1bar with his stage III vitesse unit. Using the formula above this equates to just under 10whp per psi. So with meth inj we're seeing an additional 30% per psi on the OPs build. He says he's got 'custom tuning' so I'm not sure if that means ign as well as AFR.
I would like to think so.

V2Rocket

might be a little higher than that for hp/psi as a 951 engine running NA would make less than a standard NA, having the lower compression and head differences

Rogue_Ant

Yeah - well Sean's dyno is low, IMO. But that is the trouble of comparing dyno results. Different dynos read a bit different...

apitts73

im curious about the meth kit too!! easy to set up?
any info would be great
adam

Rogue_Ant

Meh - The head flow differences are negligible. And the NA 9.5:1 CR won't make that much more power then the turbo 8.0:1, maybe 5-8% or so.