James Montigny's 383 build thread - Lots of pics
#61
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It's specific to my build and preferences. Most people would like more duration and overlap.
My previous 236/248 104LSA HR was extremely gnarly but really didn't suit my needs
(See https://ls1tech.com/forums/14710794-post14.html)
although it would have been a lot easier to tame with the LS1 PCM.
Sure, I can make a vid. Is there something specific you want to see?
I've posted pics of pretty much everything.
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It'll handle a decent shot of N20, but since I failed to set the rings up with that in mind,
I'll probably look at a 200HP direct-port setup next season.
Mostly, I just want to be able to cruise around in it and run it own the strip a few times this year.
The odometer has been at 61k since 2007
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I'll share the results as we progress though the tuning process.
Overall, the 24x works as described and is relatively easy to install.
I started a thread to discuss tips and tricks, but didn't get many responses.
Thread -> https://ls1tech.com/forums/lt1-lt4-m...tions-kit.html
I'm also trying to find an AFPR that works with the 93 rail;
I want to see if increased pressure improves atomization.
It sounds like my options are limited to modifying the stock FPR or installing AN fittings.
I don't like either option.
Thread -> https://ls1tech.com/forums/lt1-lt4-m...l#post14765990
At the same time, I'm installing a pair of wideband sensors to help with
the tune and so I have a view of what is going on on street and at the track.
Thread -> https://ls1tech.com/forums/pcm-diagn...l#post14765914
Last edited by James Montigny; 04-11-2011 at 09:13 AM.
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I geuss it's about time I provide an update on this one.
I spent a lot of time looking for leaks, but never found anything significant.
I also went to a Holley 58mm TB to see if it would work better than the BBK design.
I did find an AFPR that worked with stock lines, so the mailorder tune is set up for 60psi and works well.
Replacing the O2s with genuine GM sensors helped a lot.
Installing a MAF actually calmed the car down enough to make it driveable.
I installed the 4l60e a few months back and replaced the old tires so it would pass an inspection.
I'd like to run a MAF for street manners, but I'm not sure if I can make it work with the ram air box without hacking it up.
I have a set of brand new Kooks stainless 1.875"x1.75" headers that I want to install before I dynotune it.
The old Hooker/Jethots are rusted pretty bad.
It's more an issue of finding time to do anything anymore than it is technical problems.
When I started this project, I had two small pre-school aged boys; now I have 4 kids, two of which are in school, sports, scouts and everything else.
The car is low on the priority list.
I spent a lot of time looking for leaks, but never found anything significant.
I also went to a Holley 58mm TB to see if it would work better than the BBK design.
I did find an AFPR that worked with stock lines, so the mailorder tune is set up for 60psi and works well.
Replacing the O2s with genuine GM sensors helped a lot.
Installing a MAF actually calmed the car down enough to make it driveable.
I installed the 4l60e a few months back and replaced the old tires so it would pass an inspection.
I'd like to run a MAF for street manners, but I'm not sure if I can make it work with the ram air box without hacking it up.
I have a set of brand new Kooks stainless 1.875"x1.75" headers that I want to install before I dynotune it.
The old Hooker/Jethots are rusted pretty bad.
It's more an issue of finding time to do anything anymore than it is technical problems.
When I started this project, I had two small pre-school aged boys; now I have 4 kids, two of which are in school, sports, scouts and everything else.
The car is low on the priority list.
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Not ideal for test/tune sessions, but ok for for an occasional race day.
The car will probably see a lot more street toy time than it will drag racing.
The last time I raced was December, 2007. I was still on an H/C 350 back then.
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Sorry if I didn't see it, but what brand is the K member? Nice to see another LT1 Hawk getting worked!
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It's going to mean a road trip though, no one around here seems willing to tune a setup like this.
I'll be sure to share the results.
I need to get my new headers on first.
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Got the car dyno tuned Tuesday. Something's still not right.
It is a lot more driveable though
Although, it really reminded me of when I dyno tuned the previous cam
Lockup didn't seem to have an impact this time around though, I'll have to make sure it's even working.
If that is the case, those numbers aren't bad at all.
At the very least, maybe I just need to line up with a 420rwhp fbody and see how I do.
It is a lot more driveable though
Although, it really reminded me of when I dyno tuned the previous cam
Originally Posted by James Montigny, First page of this thread
My heart sunk when I saw back to back passes at ~300rwhp
Then, just to humor me, Ed set the converter to lock up at 45mph.
461rwhp @ 6000rpm ...
Then, just to humor me, Ed set the converter to lock up at 45mph.
461rwhp @ 6000rpm ...
If that is the case, those numbers aren't bad at all.
At the very least, maybe I just need to line up with a 420rwhp fbody and see how I do.
Last edited by James Montigny; 04-13-2012 at 11:09 PM.
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It does show pretty rich on the graph, doesn't it?
The car made more power at 12.5:1 than it did at 13:1
I didn't notice that we ended up even further, but I confirmed with my wideband today that I run richer than 11:1 under heavy throttle.
Maybe the fact that it runs better rich (or what seems like rich) is a symptom of something else.
I was planning on changing the plugs out now that it's tuned and running a leak-down while I am under there.
The car made more power at 12.5:1 than it did at 13:1
I didn't notice that we ended up even further, but I confirmed with my wideband today that I run richer than 11:1 under heavy throttle.
Maybe the fact that it runs better rich (or what seems like rich) is a symptom of something else.
I was planning on changing the plugs out now that it's tuned and running a leak-down while I am under there.
Last edited by James Montigny; 04-13-2012 at 10:41 PM.