Cascade Crew

91camaro_rs · Posted: Mon Jun 04, 2012 7:03 pm Post subject: dyno dissapointment

so expecting to have at least the same or better numbers than last year, the dissapointment continues..

last year i was at 200hp and 300tq

after my first pull engine light came on, i had been having troubles with a chip i have so i swapped it out on the dyno, this chip has been good so far no engine light its the stock AUJP. i think the only thing i did was turn off EGR. i may have put a tune on there i made previously, where i just adjusted AFR vs RPM by what my WB02 says as im driving.

anywho, what do you guys think is causing this?
is it something in the tune? if its a tune i made then it should get richer not leaner cause i only made adjustments to 4000rpms, didnt know my car would make it to 5k on the dyno

besides fixing the tune, what else can i do to the car, would a LT1 cam help at all?

i know TPI is garbage beyond 4000rpm but i love the look of it, i just wanna get the most out of it i can, aluminum heads are in the future

jchaussee · Member Joined: 14 Nov 2010 Posts: 1318 Location: renton

That some nice torque though.

chevymad · Posted: Mon Jun 04, 2012 7:38 pm Post subject:

Graphs make more sense, at least to me anyway, when you graph vs rpm instead of mph.

aaron_sK · Posted: Mon Jun 04, 2012 7:38 pm Post subject:

91camaro_rs · Posted: Mon Jun 04, 2012 7:44 pm Post subject:

code was 51 bad prom

its a speed density TPI on a factory roller cam
ill email carb conn and get my other graph with RPMs instead of mph

aaron_sK · Posted: Mon Jun 04, 2012 8:05 pm Post subject:

If you have the DRF file you can do it yourself in WinPEP.

Twilightoptics · Posted: Mon Jun 04, 2012 8:38 pm Post subject:

Change that to RPM.

Looks like a rich condition, especially if you were in limp home.

91RSVert · Posted: Tue Jun 05, 2012 12:33 pm Post subject:

From my readings, an LT1 cam isnt much more agressive then the stock TPI cam. That being said, if you can get an LT1 cam for next to nothing, give it a try.

I have corvette alumn heads on mine, for my driving, I wish I would have kept the crate/truck heads. Alot more low end tire frying. If I could find another, I would likely go back.

91camaro_rs · Posted: Fri Jun 08, 2012 8:13 am Post subject:

so if i upgrade to aluminum heads im gonna lose low end power? what heads should i get if i wanna upgrade?

91RSVert · Posted: Fri Jun 08, 2012 12:07 pm Post subject:

That would depend on what heads you have, and what you go with. As well, a cam can help change that.

My "810" heads that I had were TBI swirl port heads. Supposibly they had a "wall" at 4k just like TPI does. I rarely spin there so it doesnt matter to me.

91camaro_rs · Posted: Fri Jun 08, 2012 3:41 pm Post subject:

idk what the casting number is but they are just stoke iron L98 heads

chevymad · Posted: Fri Jun 08, 2012 4:46 pm Post subject:

L98 heads are decent heads. Especially ported. You'll need to step up to really surpass them. Just generic or vette aluminum heads might even cost you power. In fact, I'm not sure that a good head will even help you as long as you keep the tpi intake. Making a port bigger increases upper rpm hp which you cant use anyway, it also costs you velocity in the lower rpm. Possibly costing you power. So that would limit you to a small port head. Then aluminum sucks heat out of the combustion chamber. This is the reason you can add compression with an aluminum head. Adding the compression balances out the hp loss due to material.. So you break even there.

Frankly I dont see any large gains possible without ditching the tpi intake. Tuning should get you into the 230rwhp range though. After that you'll need to decide whether you want looks or hp.

Twilightoptics · Posted: Fri Jun 08, 2012 4:48 pm Post subject:

QwkTrip · Posted: Fri Jun 08, 2012 7:35 pm Post subject:

Um.... horsepower always looks good. Smack!

That's why a 500Hp beater looks good. Take away the 500Hp it's just an ugly beater.

aaron_sK · Posted: Fri Jun 08, 2012 10:18 pm Post subject:

Quasi-Traction · Posted: Sat Jun 09, 2012 11:33 am Post subject:

The mirrors on the "Banana"?

If you were going for weight reduction, why not just keep a Drivers side only?

aaron_sK · Posted: Sat Jun 09, 2012 12:57 pm Post subject:

Haha!

Chris, you know me, buddy, I can't leave well enough alone. There's an entire Crew topic about those mirrors:

http://cascadecrew.org/phpBB2/viewtopic.php?t=8800

They weigh about half what a power mirror does so it sort of is like having only one! Laughing

I have driven vehicles with only one mirror, and a vehicle with no external mirrors (stock) and I am not about it. Hell, I even took the silly car-style mirrors off the Mazda and swapped on baby towing mirrors:

http://i151.photobucket.com/albums/s131/aaron_sK/mazda/mazda006.jpg

http://i151.photobucket.com/albums/s131/aaron_sK/mazda/mazda007.jpg

91camaro_rs · Posted: Sat Jun 09, 2012 1:48 pm Post subject:

aaron was your motor pretty much stock when you had it at 240 whp?

if so wanna do some tuning?? Smile

aaron_sK · Posted: Sat Jun 09, 2012 2:52 pm Post subject:

Twilightoptics · Posted: Sat Jun 09, 2012 2:59 pm Post subject:

If you get 250 at the wheels out of a TPI, the TPI gods have shined down on you.

Does anyone have Cheezx numbers from the monster 400SBC he built? It was a crazy awesome motor, with the biggest TPI parts possible, and he put down ungodly torque, but IIRC it was still well under 300HP.