LS1 trying to decide on a cam
#22
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Everyone's idea of drivable is different. and every single car is different. some will work better some wont. the 98s with a slower comp and less resolution sometimes soak up more cam than newer fbodys. Gears make alot of diff with manual cars and a diff in autos also.
If your tune is spot on for a cam that has some overlap in a low rpm/map area like cruise, then its not spot on. Its been bandiaded to either add more air than normal, remove spark, or make it run more rich or any combo of those. Its a physical characteristic of overlap. BUT like i said every car is diff so some take more than others, but imo no more than a few degrees. As far as autos go, it depends on when or if thr tcc applies and how "loose" the converter is. Using a shorter tire height does provide more rpm/mph and can affect that as well. Ive seen tuners leave converter unlocked so it wont surge. I would never do that as it negates the whole idea of the tcc and makes quite a bit more heat and makes the car a bit more lazy.
If your tune is spot on for a cam that has some overlap in a low rpm/map area like cruise, then its not spot on. Its been bandiaded to either add more air than normal, remove spark, or make it run more rich or any combo of those. Its a physical characteristic of overlap. BUT like i said every car is diff so some take more than others, but imo no more than a few degrees. As far as autos go, it depends on when or if thr tcc applies and how "loose" the converter is. Using a shorter tire height does provide more rpm/mph and can affect that as well. Ive seen tuners leave converter unlocked so it wont surge. I would never do that as it negates the whole idea of the tcc and makes quite a bit more heat and makes the car a bit more lazy.
#23
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So I am not at the point of doing the swap just yet but would like to get the ball rolling on getting a choice, what rpm are these motors comfortable spinning I do not want to spin a bearing or walk the crank I am just starting on learning about these cars after switching over from my 07 mustang GT and am glad I made the change, would never look back
The cam that has cought my attention the most has been the MS4 cam does anyone on here run this camshaft and if so how does it work as a DD in the summer, whatever cam I pick I would like to have the option to DD the car overall goal I am shooting for at the moment is to get the car into the 10.50 area
Currently I ordered 1 7/8 long tube headers into 3" and a 3" true dual x-pipe set up so those will be my only mods so far
The cam that has cought my attention the most has been the MS4 cam does anyone on here run this camshaft and if so how does it work as a DD in the summer, whatever cam I pick I would like to have the option to DD the car overall goal I am shooting for at the moment is to get the car into the 10.50 area
Currently I ordered 1 7/8 long tube headers into 3" and a 3" true dual x-pipe set up so those will be my only mods so far
http://store.cammotion.com/the-titan4
#25
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Thread Starter
So its looking like the ms4 cam aint going to be for me, ive herd good things about brian tooley cams maybe ill see if i can get ahold of someone over there and get some help on cam selections i dont think id like driving my car around with a 4000+ stall and i really dont want to spin my motor to 6,800 rpm i want to make really good power but also have good life out of my motor so one these motors what would be pushing it as far as rpms on a stock bottom end?
#26
So its looking like the ms4 cam aint going to be for me, ive herd good things about brian tooley cams maybe ill see if i can get ahold of someone over there and get some help on cam selections i dont think id like driving my car around with a 4000+ stall and i really dont want to spin my motor to 6,800 rpm i want to make really good power but also have good life out of my motor so one these motors what would be pushing it as far as rpms on a stock bottom end?
#29
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Thread Starter
Thanks for the responses guys, is there anywhere that shows more information on the btr cams? Like powerband and what stall and gear combo would be recommended i see theres 4 different stages to the btr cams
#30
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If you go to Google, punch in BTR stage 2 cam and put Ls1 after what you're searching for and there will be unlimited information
#31
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Honest helpful tip.
Anything that comes to mind about these cars, punch it into google and put Ls1 after it and you will get info ever which way.
#32
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Am I thinking of the MS3? I thought the MS3/MS4 cams ideally need a fast intake and rpm. Yea with a LS6 intake and a inadequate valvetrain(stock lifters small pushrods not correctly measured), 6500 rpm is about right. Good flowing intake, well sorted valve train, and that cam wants 7200 rpm.
Last edited by kinglt-1; 05-28-2017 at 11:32 AM.
#33
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Originally Posted by tech@WS6store
Itll sprain your neck cruising the mall parking lot lookin for chicks in a 6spd.
#34
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Tuning wont change the pump or the fact that the pump rings that hold the vanes to the sides of the pump will distort or crack amd cause pumping loss, and the bypass spring will also open and allow pressure bypass.
It does help boost the pressure but not the physical losses inside.
It does help boost the pressure but not the physical losses inside.
#36
Stage 2 looks not too bad. I dont think it will make power under 3500 and will probably shift over 6800 so IMO for a street car, 3.73s are a minimum. If bottom end is stock and he wants something reliable, I would not rev over 6600. If your tuner asks (as he should) if the bottom end is stock, he will probably cut it off at 6600 anyways. Unless you tell him not too, but thats your choice. I think the BTR stage 1 would be a stealthy, potent choice. I would imagine it would make a very smooth torque curve and carry it until you shift.
Last edited by Bspeck82; 05-28-2017 at 07:44 PM.
#38
Idk where everyone gets such high rpm guesses for cams but the stg2 is done around 6300 to 6500 maybe. mods in thread.
https://www.corvetteforum.com/forums...g-1-3-4-a.html
https://www.corvetteforum.com/forums...g-1-3-4-a.html
#40
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Originally Posted by tech@WS6store
Idk where everyone gets such high rpm guesses for cams but the stg2 is done around 6300 to 6500 maybe. mods in thread.
https://www.corvetteforum.com/forums...g-1-3-4-a.html
https://www.corvetteforum.com/forums...g-1-3-4-a.html
I'm on my phone right now so no time to show the math, but actual tq delivered to the tires at 7000 rpm in first is much higher than at peak tq in second. Even though the engine gains tq on the upshift. Gear multiplication works against.
I like a car that makes its best tq at 5200 and power at 6800-7000. Rev to 7400, hit 5000 on the upshift and ride that torque curve down. But even on a 4800/6300 tq/hp motor, I still like 7100 for shift points to minimize losses on the upshift.