I'm surprised L31MaxExpress didn't recommend anything here but sub-400fwhp, the stock throttle body is fine with the ridge ground down. I used a BB TBI throttle body on ~375fwhp 355cid, it worked but probably not necessary for my power level.
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I'm surprised L31MaxExpress didn't recommend anything here but sub-400fwhp, the stock throttle body is fine with the ridge ground down. I used a BB TBI throttle body on ~375fwhp 355cid, it worked but probably not necessary for my power level.
Yeah I have a 46mm TB and a bored to 48mm 3704 intake and with the IAC opening to 255 counts at WOT, when I get up to ~5700 RPM my MAP is ~90 (IIRC without looking at my logs). I kinda look at it like when NASCAR races with restrictor plates, it still pulls strong throughout. I'm not racing it, and don't really plan to but, if I did I'd probably go to a 50mm 7.4L one.PlayingwithTBI's truck has a substantial WOT MAP drop on his 383 and he can correct me if I am wrong, but it has a 46mm on it.
You actually dropped into the mid-high 80s from memory above 5,000 rpm. Then again I did not see your key on Barometric pressure, so 86-88 kpa might not be that much loss.Yeah I have a 46mm TB and a bored to 48mm 3704 intake and with the IAC opening to 255 counts at WOT, when I get up to ~5700 RPM my MAP is ~90 (IIRC without looking at my logs). I kinda look at it like when NASCAR races with restrictor plates, it still pulls strong throughout. I'm not racing it, and don't really plan to but, if I did I'd probably go to a 50mm 7.4L one.
I just went out and did some more VE Learns and made a couple hits. Here's one when I merged onto I-10 at 82 MPH in 3rd with ~90° ambient temp. AFR dropped from ~12.5 to 11.9 quickly when it got over 5000. It is definitely wanting more airYou actually dropped into the mid-high 80s from memory above 5,000 rpm. Then again I did not see your key on Barometric pressure, so 86-88 kpa might not be that much loss.
I started with that cam in my 350 (before I threw a rod bearing). It idles fairly smooth and has good response. We're back to getting enough flow through the TB.Is there a better alternative to the LT4 cam? like the COMP 08-300-8? which is similar in duration but I´m guessing gets more aggressive(to aggressive for Daily driver reliability?) than the LT4 after the 050 lift point.
I just went out and did some more VE Learns and made a couple hits. Here's one when I merged onto I-10 at 82 MPH in 3rd with ~90° ambient temp. AFR dropped from ~12.5 to 11.9 quickly when it got over 5000. It is definitely wanting more air
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Later I did a couple 0-60s, the 1st one I fed it too much pedal and spun out until I let off and hit it again in 2nd gear, made an 8.3 second run (accoding to my Dakota Digital dash). The next one I slowly fed her the pedal and turned a 7.2 (coincidentally). I really need a locker
I think I like the look of that cams specs better than the Summit 8800 I am planning for my 383. I like the narrower duration split, makes for more low-speed torque than a wider split by reducing overlap and early exhaust blowdown. Guess I should model that cam next to the 8800 in DD2003 and Engine Analyzer for the overall torque curve difference.I started with that cam in my 350 (before I threw a rod bearing). It idles fairly smooth and has good response. We're back to getting enough flow through the TB.
Here's a link to where I was tuning it and, with the IAC max set to 145. Notice even with this cam and 1.5 rockers, same 46mm TB, same aluminum heads, it's still wanting more air.
My Flat Tappet Cam Wiped Out So I Decided To Go Roller
I have another issue - when I had the original peanut cam in it, my oil pressure, when hot, was ~40 @ 2000+RPM and 10 PSI @ idle. When I put in the Lunati flat tappet cam the pressures went up 10 PSI across the board. Now, with the Comp cam, it's back down to, or a little lower, than what the...www.gmt400.com
Another thought, you'll have to do something with your heads to allow .525" lift. Whether it's umbrella seals, machining and choice of springs. IDK what you can get out of 193 heads.
So thats with a 383, hotter cam than I'd like to run, pretty darn good Summit/TF 170cc heads, Eddy TBI intake, 46mm TB and 4.11 Gearing right? I probably have to lower my expectations a bit, looks like. Because, 350, TBI heads, less cam and 3,73 gears... But on the bright side both the TH700 and the G80 is probably less likely to immediatly selfdestruct that wayLater I did a couple 0-60s, the 1st one I fed it too much pedal and spun out until I let off and hit it again in 2nd gear, made an 8.3 second run (accoding to my Dakota Digital dash). The next one I slowly fed her the pedal and turned a 7.2 (coincidentally). I really need a locker