: dyno results 90mm tb upgrade on a maggie



OneFast V
12-08-12, 01:21 PM
So about a month ago my throttle body failed at thunderhill raceway in the middle of a session. Unforntunately i had to have it towed home. However, I had already bought up all the parts to switch my tb over to a 90mm tb (maggie snout, 4 tb bolts, tb harness adaptor, 90mm tb). Since I don't HP Tuners and im not very knowledgeable about tunes, i took it to the person who originally tuned my car. Anyways here is the dynosheet, picker up ~15whp and 7~wtq. i'm now at 461/445. I'm pretty happy with this. Also I don't know that I have ever seen a dyno sheet where the only mod was a tb upgrade.https://sphotos-a.xx.fbcdn.net/hphotos-ash4/382092_10100664966813035_1715082834_n.jpg

darkman
12-08-12, 01:36 PM
Great numbers:thumbsup:

alradco
12-08-12, 09:24 PM
That's a nice pick up across the power band by why is it losing so much power after only 4500 rpm? Is that a maggie thing or??

darkman
12-08-12, 10:13 PM
I think the apperance of torque drop comes from the unusual scale used. If you measure the torque at 6,000 rpm of 395 foot pounds against the peak of about 445 foot pounds you get 89% which is not much different from a normal LS6 curve. The normal LS6 curve though does peak at 4,800 rpm, but I am assuming the early peak is the maggie.

HAMSTAR
12-08-12, 10:22 PM
That's a nice pick up across the power band by why is it losing so much power after only 4500 rpm? Is that a maggie thing or??

Guys, that's an artefact of the way the graph is set up. See that it starts at about 375 HP and lb-ft. It looks like a big drop from 4500 RPM, but it's actually only dropping 444 to 390. If the graph started at 0 on the y-axis, it wouldn't look like such a steep drop.

Also, if you think that's a big drop, just look at the HP. HP and torque are just two sides of the same coin, after all, just different ways of displaying applied power througha drivetrain.

----------


I think the apperance of torque drop comes from the unusual scale used. If you measure the torque at 6,000 rpm of 395 foot pounds against the peak of about 445 foot pounds you get 89% which is not much different from a normal LS6 curve. The normal LS6 curve though does peak at 4,800 rpm, but I am assuming the early peak is the maggie.

lol, yup.

FuzzyLogic
12-09-12, 08:35 AM
I asked the same question. See OneFast V's response (http://ls1tech.com/forums/16961093-post6.html) there.

Skidmarcx
12-09-12, 02:15 PM
Nice numbers man... And yea that's typical of the Maggie to roll off like that...

OneFast V
12-09-12, 05:07 PM
Thanks, i thought people would like to see the HP benefit of a TB switch on the maggie.

HAMSTAR
12-09-12, 07:47 PM
Thanks, i thought people would like to see the HP benefit of a TB switch on the maggie.

Will def be useful to people. Do you notice any qualitative benefits, like improved throttle response?

OneFast V
12-09-12, 08:07 PM
Will def be useful to people. Do you notice any qualitative benefits, like improved throttle response?

I can't tell a difference. I don't know that there should be any better throttle response as the tb is not ported.