poltergeist 02

iTrader: (65)

Ah, just reread your last post and you said the tune was not updated. That could definitely be your issue!

ironmanLS1

iTrader: (9)

Absolutely!

HioSSilver

iTrader: (8)

Yea man....get that thing tuned and check the trans out. You'll probably be on the way to getting the performance you should have then.

NW Iowa WS6

iTrader: (9)

I wish i could say my trans is slipping but my car is what it is, going on here im slow but in the last 5 years at my local track i have the fastest cam only and now heads/cam car ive seen, the ones with similar dyno numbers at the same shop but less weight loss and gearing do about 2-3mph less than me

HioSSilver

iTrader: (8)

What's the da there nw? What hp do you make?

edit...duh... I see your power. You should be much faster.

Kingc8r

iTrader: (21)

Sounds trans, tune or a combo of both issue. I'd expect better traps than that. Definitely get a retune.

Have you also replaced the simple stuff? Plugs, wires, fuel filter, clean your maf etc?

ironmanLS1

iTrader: (9)

I don't think the trans is slipping, but I am concerned with the 3rd gear vibration consuming power. It may be negligible though. I agree on an updated tune required. The simple stuff is all done, new plugs & wires, fuel filter, intake tract all cleaned.

ironmanLS1

iTrader: (9)

This thread got me thinking and I put on paper everything I want to do over the winter. I started a new thread in the drag racing section if you are interested in following.

Thanks All!

https://ls1tech.com/forums/drag-raci...-3-tenths.html

ironmanLS1

iTrader: (9)

I ran the car over the hill to FJ Performance and put it on their Dynojet dyno. The first time on this dyno. It made 376 hp and 365 ft-lbs.

The trans looked good, no slipping. This pull was with the converter locked. I did find out the injectors were at a 98% duty cycle. I'll post the curve on my other thread.

Kingc8r

iTrader: (21)

Those aren't that great of numbers with those mods and a locked converter

HioSSilver

iTrader: (8)

That could be the issue. Not really slipping but just turning your power to heat. There has been a ton of guys pick up time just off the trans rebuild with no real issues showing before the rebuild.

NW Iowa WS6

iTrader: (9)

Typical DA is 3000-4000 and i run 11.9-12.0s@114-115ish then, best time in my sig was 1900DA, its a slow track haha, pullied cobras on the 480-500whp range are right on par with me too, even a heads/cam ls7 z06 only trapped 121 last time i was there when i was doing 115 that night

Kingc8r

iTrader: (21)

What I was thinking too. A few people here locally had the same thing happen.

ironmanLS1

iTrader: (9)

I guess the way I look at it, if the sunshell is vibrating then it is converting rotational energy (torque) into something else, ie vibration and heat. I notice the vibration at steady state driving, but not at full power, nor if you shift into OD. I will assume the vibration is still there in full power third gear even though I don't notice it. The question is how much power is this costing me?

Thanks for the feedback.

Kingc8r

iTrader: (21)

Yea well hopefully you get it get it figured out soon. Theoretically in good weather and your mods you should have a high 10s low 11s car.