Dyno #'s w/HSW 150 wet... runs RICH

[Eagle]

Hey all-

Went to the dyno yesterday... 101* and 52% humidity...

My NA pull made 316hp 323tq. The A/F ratio is a little fat, but its a nice flat line and the car ran well there - any leaner and it looses power.

My N2O pull made 394hp 486tq... you'll notice no A/F chart on this sheet... because it ran SUPER fat. So fat indeed that the moment the nitrous hit, the A/F #'s fell below 10 and the machine couldn't chart them! With 150HP jets installed, I only increased 78HP and 163TQ.

Bottle pressure was at 1000psi and it was 101*F in the dyno building.

With the increased bottle pressure, I'd expect to see it a little lean... not so damn rich that it bogs down the car when the n2o hits (still strong, but I'm leaving 20-30hp on the table I'd bet.)

I need to jet the fuel down a bit since the A/F is linear and fairly close to correct NA... but falls thru the floor and goes FAT on the juice. Question is, how far do I go? I'm currently running n20=.062 fuel=.034. Wish I could have re-jetted it on the dyno, but that wasn't an option unfortunately. I still dont have a wideband either.

I'm uploading short vids of each pull to putfile now, I'll post them a bit later.

-Eagle

[Danger731]

Is this a newer HSW kit ?

[Eagle]

Yes, I bought it in May? of this year. Its the sudden impact wet kit.

NA pull vid:
http://media.putfile.com/NA-Dyno-Pull---AFM-Aug-07

N2O pull vid (listen for the bog right when the window switch goes on):
http://media.putfile.com/NA-Dyno-Pull-AFM-Aug-07

-Eagle

[mrr23]

if it's under 10:1, i would go down to .031 jet. most companies use 62/32 as a 150 shot.

[Eagle]

Its definitely under 10... the meter just flat lined at 10 and sat there the entire pull...

I have a .031 jet handy... I'd want to scan against it tho... its the jet thats supposed to be used for the 125 shot according to the card. What O2 voltage should I expect? Still 890s?

[mrr23]

950-980ish

[Eagle]

Roger that! Thx mrr!

[N20LT4]

Ouch. You should have way more in it than 78hp. I gained 98.2rwhp from a 100-shot (Dyno Tune Kit).

[Eagle]

I did get quite a bit of torque tho... I'm always looking for the silver lining...

[Danger731]

Fix that A/F, Matt says the new kits are rated RWHP. You got a 50 % loss.

[Eagle]

Ya I know it, thats my problem! I'm hoping Matt will reply here...

[greatwhiteZ28]

isnt torque the one that really matters thoe, nut high 70's hp, should be more.

[mrr23]

the hp number is a joke. i have been as low as 91 rwhp on a 150, but i finally got it figured out.

[greatwhiteZ28]

is that a new ride for you MRR23 thats on your sig??

[mrr23]

yep. i bought badbluebird car.

[Eagle]

Congrats on the new ride mrr! Whats the plans for that one?

[mrr23]

want a full out race car. going to gut it out and build a 454 LSX motor for it. always liked the maui blue.

[N20LT4]

want a full out race car. going to gut it out and build a 454 LSX motor for it. always liked the maui blue.

Why not '455' for Trans-Am tradition??

[mrr23]

don't feel like honing out the new LSX block for 1 cubic inch.

[Eagle]

lmao @ 1 cubic inch.