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Old Apr 29, 2022 | 09:53 AM
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Originally Posted by mstansbury0704
What was your power before boost? Stockish cam and stock heads? I was looking at my logs and on a short pull from a sub optimal rpm for the CAM, it went from 60-80mph in 1.5 seconds on an uphill drive with no wheel spin… this combo is surprisingly VERY trackable seeing as the cam makes peak torque in the upper 4K rpm but still holds its own downlow. I’d highly suggest it. Now my possible Frankensteined blower may be part of the deal, but I see no noticeable issue running a NA max effort cam with boost. In fact, it seems to really hook well, allowing the car to squat down at 3k and by the time the torque spike comes in it’s planted and rolling.

On the one end though, how are you all dealing with the procharger inlet hat? Mine popped the rubber hose off on the inlet hat side. I am wondering if the engine isn’t torquing up and it’s pushing on the frame. Maybe rotate the inlet hat down a hair? Procharger’s inlet hat sucks ***. It’s not a good design for sealing. The end of it has a slight concave in it so a hose clamp doesn’t squeeze it very tight. I’ve grabbed an assortment of t bolt clamps from work to test out for the sizing as I popped the charge pipe off the driver side intercooler. Stuck it back with 2 hose clamps but would like something better..
I have zero idea I never ran this motor without boost. I built it specifically for boost and already had the Procharger. It’s an ls3 block. Cam is custom for my setup from cam motion. I run a blower guard no air filter. I can’t say yet whether going to the 3.55 pulley actually picked up anything because I was already past max impeller speed. I shift at 7200 at the track and 6500 on the street. Never been on a dyno. Trapped 119 in the 1/8th at about 3800 lbs with me in it so it’s got to be close to 850-900 rwhp.

Sounds like your combo is doing well I wouldn’t hesitate to spin it 6500 as long as the tune is good and with that amount of meth it should be fine.
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Old Apr 29, 2022 | 10:48 AM
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Oh no I mean what was done to the SBE LS1 that held 14psi?

119 in the 1/8th. Holy fawk. Lol that’s what some run in the 1/4.

definitely hauling in that thing lol. Streetcar? AC and all? I’m guessing at 3900lbs it isn’t a gutted deal. Definitely nice setup.
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Old Apr 29, 2022 | 11:15 AM
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Originally Posted by mstansbury0704
Oh no I mean what was done to the SBE LS1 that held 14psi?

119 in the 1/8th. Holy fawk. Lol that’s what some run in the 1/4.

definitely hauling in that thing lol. Streetcar? AC and all? I’m guessing at 3900lbs it isn’t a gutted deal. Definitely nice setup.
sbe was cam only. It felt like it had good power, but never really ran like I thought it should at the track. I kept adding boost and it got better, but still didn’t run what I thought it should.

I decided to quit while I was ahead and bought a 6.2 377 short block from TSP. Been very happy with this combo. Cam is 232/248 .62x .6xx 116 +5.

Its “maybe” 3800 with me in it that’s a guess based upon what it started as and what I removed plus the weight of the Procharger Full interior, but no ac and some other minor weight reduction. 15” wheels with skinnies up front also.

In the process of putting a cage and racing seats in it so I can race again. Probably going to end up a race car now lol. I plan to keep it streetable, but definitely isn’t going to be a daily driver.





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Old Apr 29, 2022 | 03:35 PM
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Look at that pretty engine bay lol. Mine still needs dressed up. What kind of time and what gears were you running when you were cam +boosted ls1? I’m definitely going to need to have the third member re geared for this combo. I’ll definitely be out of gear in the 1/4 as I was close with the NA setup spinning it higher than I plan on now.
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Old Apr 29, 2022 | 03:54 PM
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Originally Posted by mstansbury0704
Look at that pretty engine bay lol. Mine still needs dressed up. What kind of time and what gears were you running when you were cam +boosted ls1? I’m definitely going to need to have the third member re geared for this combo. I’ll definitely be out of gear in the 1/4 as I was close with the NA setup spinning it higher than I plan on now.
4l60e stock 3.46 gear with a spool. 6.7x with a 1.7x 60' in the 1/8th I think was the best it went on sbe. I still have stock gears. It's been low 6's with current motor on less boost 5.90's is the goal for now. I have to address some safety rules first so I can race again. Hopefully when I get more passes I can get the 60' down. I've made some improvements, but there is work to do and it's a GTO so 60' times aren't their strength at all. Goals always change and once you have boost you only want more. You're going to end up going wild with it over time it's a normal progression. Might as well start adding boost now...lol.
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Old Apr 29, 2022 | 09:15 PM
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Damn a stock 4l60 held that? My bolt on old LT1 car with a 3k stall even broke one of those lmfao. Seems I’d be okay if I wanted to run in the 1/8ths. But 6 speed car so it’s had 4.11s in it forever now..
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Old Apr 30, 2022 | 10:10 AM
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Originally Posted by mstansbury0704
Damn a stock 4l60 held that? My bolt on old LT1 car with a 3k stall even broke one of those lmfao. Seems I’d be okay if I wanted to run in the 1/8ths. But 6 speed car so it’s had 4.11s in it forever now..
Trans was built by RPM. Better converter now than when I had the sbe certainly helped also.

For sure you’re going to want a gear change.
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Old Apr 30, 2022 | 10:34 AM
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Yea I was thinking maybe a 3.89 ratio
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Old Apr 30, 2022 | 10:49 AM
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Originally Posted by mstansbury0704
Yea I was thinking maybe a 3.89 ratio
Id go further than that. I wish I had a 3.23 or something rather than my 3.46 even.
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Old Apr 30, 2022 | 10:57 AM
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Yea playing with gear calc. Looking like a 3.70 would get me 128mph@ 6200rpm and a 3.50 would get me 135
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Old Apr 30, 2022 | 11:30 AM
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Originally Posted by mstansbury0704
Yea playing with gear calc. Looking like a 3.70 would get me 128mph@ 6200rpm and a 3.50 would get me 135
You're going to end up going over 140 maybe 150+ in the 1/4 before this is over...lol. We all thought we "only" wanted 8-9 lbs of boost and 600 rwhp when we started. It doesn't take long and you gain some confidence in the tuning side before you want more and more.
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Old Apr 30, 2022 | 11:35 AM
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Yea lol I don’t think so until I get a new motor. I’m surprised it ain’t **** the bed already. Just gotta get the tune dialed in. Having bad data on the decel. Sometimes it’s rich and sometimes it’s lean. Probably all those exhaust leaks LOL
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