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I think if it were me I would try a performer RPM intake. Not sure what’s on the car now but that could let her pull a bit higher in the RPM range.


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Originally Posted by 1 Slow SS
I think if it were me I would try a performer RPM intake. Not sure what’s on the car now but that could let her pull a bit higher in the RPM range.



I think it has a big single plane on it already, super victor I think. That's going to obliterate any dual plane up top.


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Yeah, it has a single plane on it. It’ll peak more HP at a much higher rpm once they get the bugs worked out of it.

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Originally Posted by Travis Jones

If you have room under the hood, I'd consider a 1 inch TB spacer, It might help take the dip out from 5000-6000, that's probably harmonics from the intake runner design, a little more plenum volume might help.


That dip was a misfire condition, I was standing behind the car and heard it plain as day...


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Originally Posted by Travis Jones
The torque is a little peakier than I expected, not that there isn't a lot of it, there is! but it comes on in a wave at 3000 and then falls away pretty quick at 5000rpm. (but that also might just be the visual impression as the x axis is always a little squished with the Dynapack software or your ignition woes)


I think the torque will stay pretty level once the misfire above 5000 is cured.

Originally Posted by Travis Jones

The the tuner definitely found some midrange for you. You even have my LS3 beat in torque production below 3000 by a few numbers.

That doesn't surprise you does it? wink

Originally Posted by Travis Jones

The dynapack dyno results are consistent with the engine dyno results you posted years ago, accounting for the single plane intake/efi swap. What's interesting is that it doesn't seem to have moved peak torque up at all, but peak power moved up about 500 rpm this speaks to a better VE, usually you'd see that both numbers move higher in the RPM range with a single plane, but that also might be difference in ramp rate with the dynos, engine accessories etc. as also you usually see a chassis dyno show peak power and torque at a lower RPM than the engine dyno. My takeaway from this is I think the engine likes the bigger exhaust and headers. figure out the misfire and let this thing eat.


It's still got the same 1 5/8" mid length headers it's had all along. The peak torque stayed right at 4700 even with the single plane and EFI which did sort of surprise me. The peak HP will move higher considerably once we get things ironed out. I think the large (and more better) exhaust did help the upper RPMs considerably though.


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Test drive successful, car will make it to the race tomorrow, now just hope it passes sound...

I'm thinking the rotor grounding out thru the distributor shaft was the misfire issue.


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Desperate times call for desperate measures... I'm pretty sure it'll make sound tomorrow now...

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Ha, Ha, Ha, Ha, Ha, Ha ,Ha, Ah Ah, AAAAAAAAAAAAAAAAAAAAAAAH H, HA, HA.
Sorry, just can't stop laughing.

Have never seen that done before.
Just think the engine will chew that up and spit it out.
Bob

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It's an old autocrossers trick. It's very effective, knocked the harsh right off the tone.


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Sounds wicked! I take that it came under the sound limit,, barely?

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So one of my burritos fell out on way to track. It passed the sound check anyway. Then after my second run I pulled the other one out. Had the sound guy measure me on 4th run, 80.8db at 61 mph... Good to go.

It actally gets quieter the more it revs, everyone said it sounds great on course. When I start it in paddock though, everyone turns around to look. laugh


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What’s the max?

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92db


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The high rpm miss is fixed?
The car felt good?
You are off to finish the business with the tuner?
Got anymore video?
How long did it take to get the rust off? That"s what they call it here at the first event in the NE.

Two weeks until my last of the season.
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Originally Posted by mmc427ss
The high rpm miss is fixed?
The car felt good?
You are off to finish the business with the tuner?
Got anymore video?
How long did it take to get the rust off? That"s what they call it here at the first event in the NE.

Two weeks until my last of the season.
Bob


Nothing rusts in AZ, not even Lance's driving HA!


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Couldn't you be 10 times louder if you are 10 dB below the limit?

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Originally Posted by mmc427ss
The high rpm miss is fixed?


I think so... The mid range misfire is gone for sure, at the top end there's a bit too much noise and confusion going on inside the car to tell for sure. laugh

Originally Posted by mmc427ss

The car felt good?


For really old tires, no Acceleration Enrichment at all and a course that didn't really fit my style...it was okay.

Originally Posted by mmc427ss

You are off to finish the business with the tuner?


Going to try to get him to address some things remotely first before committing to letting him beat on my poor car on the rollers for another 3 hours straight without a break.

Originally Posted by mmc427ss

Got anymore video?


Some, want to see a short clip of my first run totally blowing a corner and smoking a cone head on?

Originally Posted by mmc427ss

How long did it take to get the rust off? That"s what they call it here at the first event in the NE.


See answer above...

Originally Posted by mmc427ss

Two weeks until my last of the season.
Bob


Go get 'em...


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Originally Posted by SickSpeedMonte
Couldn't you be 10 times louder if you are 10 dB below the limit?


I thought we've already established that I'm no mathematician... laugh

I was just happy to put that issue to bed for good. I think what happens is these mufflers get quieter the higher the engine revs. That's what saved me.


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This is what 5 months of rust and a car not doing what I expected it to do right off looks like

https://youtu.be/tjxiFypWenU


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I was having an issue with inconsistent brakes this weekend (not sure if that was your issue). I don't have a vacuum reservoir, so maybe I am having inconsistent brake assist from the vacuum booster. Part of me wonders how I would do just removing the vacuum for the track and plugging it.

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Like I said above...my issue was rust... My brakes are awesome, I just have to remember to use them properly.

I LOVE my power brakes, heel on the floor modulate with my toe...they work perfect for me. Every time I autocross a car with manual brakes I hate them. I know others like them though so...

Do you left foot brake? I can't remember...


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Originally Posted by SickSpeedMonte
I was having an issue with inconsistent brakes this weekend (not sure if that was your issue). I don't have a vacuum reservoir, so maybe I am having inconsistent brake assist from the vacuum booster. Part of me wonders how I would do just removing the vacuum for the track and plugging it.


I have a vacuum pump that I need to install. I think I have 13 inches of mercury at idle, its just not enough. Could also be the factory combo valve giving me fits. I'm on the fence on if I really want to try ABS or just use the Wilwood prop valve.


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Originally Posted by SSLance
Originally Posted by SickSpeedMonte
Couldn't you be 10 times louder if you are 10 dB below the limit?


I thought we've already established that I'm no mathematician... laugh

I was just happy to put that issue to bed for good. I think what happens is these mufflers get quieter the higher the engine revs. That's what saved me.


A 10 dB increase roughly doubles the volume, so you're well under the track limit. Sounds like that muffler acts the opposite of the straight through Borla, DynoMax Ultras, and MagnaFlow mufflers, which are relatively quiet at idle and cruise when compared to WOT.

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