cam question
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Teching In
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cam question i know there is more than one way to go about specing a cam for the same goal so i hoped to hear everyones thoughts on this one.
i was looking at an old 99' Vinci article http://www.vincihiperformance.com/ma...e%20c5%20.html
216/224 115 l/s advanced 5 i think
it peeks at 5,800 which is my goal though id love to see the tq start MUCH earlier and have in the ball park of Zero overlap.
*** i couldnt tell what mods were used but ill use a stock 98 ls1 inc manifolds
wish to use inexpensive springs,too if possible.
thanks for all the insight Tim
i was looking at an old 99' Vinci article http://www.vincihiperformance.com/ma...e%20c5%20.html
216/224 115 l/s advanced 5 i think
it peeks at 5,800 which is my goal though id love to see the tq start MUCH earlier and have in the ball park of Zero overlap.
*** i couldnt tell what mods were used but ill use a stock 98 ls1 inc manifolds
wish to use inexpensive springs,too if possible.
thanks for all the insight Tim
That's a Crane cam, 216/224 115lsa+4, lift .551"/.551", -10* overlap.
http://www.ws6project.com/user_stor/...16-224-115lsa/
Crane does offer a 216/224 114lsa+4, lift .585"/.585", -8* overlap.
http://www.ws6project.com/user_stor/...oducts_id=4926
If you want the trq to peak earlier, and have around 0* overlap you need a custom cam.
You can't have both, if you want the trq to peak MUCH earlier then you'll also need the hp to peak earlier. So what's more important to you 5800 hp peak or MUCH earlier trq ..? It'll peak a little earlier with a narrower lsa but not a lot.
So what do you want..?
This: 216/224 111lsa+0....same hp peak as 216/224 115lsa+4, OR 216/224 111lsa+4 ... peak hp-300 rpm... and earlier(lower rpm) trq?
http://www.ws6project.com/user_stor/...16-224-115lsa/
Crane does offer a 216/224 114lsa+4, lift .585"/.585", -8* overlap.
http://www.ws6project.com/user_stor/...oducts_id=4926
If you want the trq to peak earlier, and have around 0* overlap you need a custom cam.
You can't have both, if you want the trq to peak MUCH earlier then you'll also need the hp to peak earlier. So what's more important to you 5800 hp peak or MUCH earlier trq ..? It'll peak a little earlier with a narrower lsa but not a lot.
So what do you want..?
This: 216/224 111lsa+0....same hp peak as 216/224 115lsa+4, OR 216/224 111lsa+4 ... peak hp-300 rpm... and earlier(lower rpm) trq?
Last edited by 99Bluz28; May 20, 2014 at 01:34 AM.
I ran that cam for a couple of years. It was OK but in the end it wasn't polished properly and it damaged the rollers on my Morel lifters. I think you are going to want a smaller LSA to push the torque down. Have you looked at any truck cams since it looks like this may be going in a Jeep.
Thread Starter
Teching In
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lower L/S and truck cams Thanks guys..
yes ive looked at the truck cams...
206/212 112 comp 800- 5,800 plus 2
210/218 112 vinci plus 5 aprox same rpms
Both look awsome but no lope
My thought was pre-90's cams that were on 110 l/s tq peeked low and hp high
but i guess i may have to settle
Guess id need some kind of software to visualize Exactly what im giving up.
Any Suggestions????
Is comp Sim 5 an good? self update may work with the cams just about to come out.
Thanks again for all the help
yes ive looked at the truck cams...
206/212 112 comp 800- 5,800 plus 2
210/218 112 vinci plus 5 aprox same rpms
Both look awsome but no lope
My thought was pre-90's cams that were on 110 l/s tq peeked low and hp high
but i guess i may have to settle
Guess id need some kind of software to visualize Exactly what im giving up.
Any Suggestions????
Is comp Sim 5 an good? self update may work with the cams just about to come out.
Thanks again for all the help
Thread Starter
Teching In
Joined: Nov 2008
Posts: 44
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set-up this is a HEAVY Jeepbest est. 5,000 lbs
98' bone stock ls1, 347, 853 heads ls1 intake w/free mods
manifolds, stock style exhaust 2 1/2"
trans nv4500 /4.10 gears 5.61,3.04,1.67,1.0,.73 if memory is right
38.5" tires
**actually final ratios is pretty good though going from 1st gear to 2nd is a bit wide Weight is the problem**
thanks
98' bone stock ls1, 347, 853 heads ls1 intake w/free mods
manifolds, stock style exhaust 2 1/2"
trans nv4500 /4.10 gears 5.61,3.04,1.67,1.0,.73 if memory is right
38.5" tires
**actually final ratios is pretty good though going from 1st gear to 2nd is a bit wide Weight is the problem**
thanks
I have a 215/215 .604/.604 112+2 cam that really has a lot of low end grunt. I use it in 4.8's and 5.3's a lot.
You could utilize a little more camshaft duration than those combinations, but not much seeing how heavy the vehicle is and low speed torque is most important in your application.
For a HP peak of 5800rpm, 6200rpm shift point and a 6400rpm rev limit and grunt off idle I'd recommend 218/222 .598/.566 112+2.
This will also give you a little bit of the idle sound you were requesting as well.
I do feel though that possibly an even smaller cam would allow more performance in your application, but the idle sound won't be as prevalent. A 214/218 .595/.563 111+2 would make more torque in the RPM range you need it and still sound similar to the 218/222.
I would recommend a PAC 1219 beehive spring as they are a drop in for stock locators and retainers and inexpensive. I can supply you with the cam, springs, push rods, valve seals, water pump gaskets, timing cover gasket/seal and balancer bolt that you will need.
Hope this helps.
You could utilize a little more camshaft duration than those combinations, but not much seeing how heavy the vehicle is and low speed torque is most important in your application.
For a HP peak of 5800rpm, 6200rpm shift point and a 6400rpm rev limit and grunt off idle I'd recommend 218/222 .598/.566 112+2.
This will also give you a little bit of the idle sound you were requesting as well.
I do feel though that possibly an even smaller cam would allow more performance in your application, but the idle sound won't be as prevalent. A 214/218 .595/.563 111+2 would make more torque in the RPM range you need it and still sound similar to the 218/222.
I would recommend a PAC 1219 beehive spring as they are a drop in for stock locators and retainers and inexpensive. I can supply you with the cam, springs, push rods, valve seals, water pump gaskets, timing cover gasket/seal and balancer bolt that you will need.
Hope this helps.
Last edited by Sales@Tick; May 23, 2014 at 09:19 AM.
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Thread Starter
Teching In
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cam ideas... thanks Martin
Actually im in my learning stage and not ready to do a cam yet.
i am actually just starting a ground up project and want to learn all i can so when im ready to order ill know what my trade offs are and what right for my combo.. btw i really like the idea of the 2nd one a lot.
thanks for Your suggestions
Actually im in my learning stage and not ready to do a cam yet.
i am actually just starting a ground up project and want to learn all i can so when im ready to order ill know what my trade offs are and what right for my combo.. btw i really like the idea of the 2nd one a lot.
thanks for Your suggestions
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Yep, Martin is right on with that. The second cam has -6° of valve overlap. You will hear the cam over a stock one definitely. The first choice was -4°. The more overlap you have the more prevalent the idle will be. However, I would get something that is going to suit your needs in performance over sound first. If it happens to do both then you win two-fold! The trade-off will be with more positive, or closer to positive overlap you will get, will come with more top end than low end grunt.
On a second note, I would probably not look at any off-the-shelf grind for your application. Since its pretty specific and clear you wont be racing this thing I would opt for a custom one. Price is pretty much the same in most cases.
On a second note, I would probably not look at any off-the-shelf grind for your application. Since its pretty specific and clear you wont be racing this thing I would opt for a custom one. Price is pretty much the same in most cases.
Thread Starter
Teching In
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thanks orange apeel Your right on with me both me needing CUSTOM CAM and me needing to target my app over sound. the more i learn about cams the better idea i have on what ill really want and need. ideas change with knowledge.
ls1 software may also help a little in the idle debt so i can go smaller.
ls1 software may also help a little in the idle debt so i can go smaller.
I'd still go with a wider I/E split with using the stock exhaust manifolds and more advance for better low end, like a 214/222 112lsa+5 (lift .595"/.566") or, a 213/222 112lsa+4 (lift .602"/.566") or for better valvetrain life with a little sacrifice in power a 214/222 112 lsa+5 (lift .559"/.566") with Comp Cam lobes or you can do a very similar cam with Cam Motion lobes.
