Gm847

[MunsterZ28]

fixed

only cuz urs doesnt have a scatter sheild. dont be escured

[Phantom409]

I have a 306 I'll sell ya if you decide to go with that cam.
Never used, brand new.

[Kwazrollinz28]

306 cam doesnt bother the bottom end as much

[white97z28]

What you'll need to do is find a cam with a better RPM range then. While it's not universally the case (or maybe it is?) what I've always understood is that the bigger the cam is the more bottom end you're going to be losing because it's going to be performing in higher RPMs. I love my CC503 and it feels like it has great grunt all around. The CC503 or a comparable custom grind cam from Comp Cams, Lloyd Elliot, or Advanced Induction (in no particular order) seem to be the real popular ways to go.

In my particular case, my HP numbers might not be 100% accurate because I had a faulty fuel pump that was dropping to 20psi and giving me a real lean WOT, but I was like 325 hp, 322tq. 30# injectors, upgraded springs, 1.6 roller rockers, heads have the bowls ported, hardened push rods, LS7 lifters, custom stall from Mike Ridings, 4L60e rebuilt by Ridings as well. While the videos won't tell you much of anything, I've got a ton of videos on youtube: http://www.youtube.com/mifbody

Well i am eventualy going to build the bottom end but for now i just want to a more bolt on valvetrain aprotch to the motor...but i also plan on getting a tune, headers, shift kit, 3000 stall, a trans cooler?, 3.73 rear gears, some drag radials,...think there is more but cant remember.

if you want bottom end power you dont want to be looking at a cam with 240+ duration.

if you really want to learn about cam specs, read the sticky i posted in the intake/exhaust section.

Thanks ill try and read up on it.

Yes, bigger is not always better when it comes to engine components. If you need to use a 3000 stall, then you probably don't have a street friendly car anymore. You will almost never be in lockup, unless you are going at freeway speeds with high ratio gears...but that isn't really desirable either. That's why I took a look at what converter I would have to use when I was shopping for a cam....that gives a good idea of how the car might behave, depending on your application.

What is a lockup? sorry im not as learned as i wish i was! lol

a 3000 converter is no where near undriveable, who the hell is tuning your guys cars? I daily drive a big cam and 4000 stall converter and my car drives very very well. With a tighter 3500 converter you'd never even notice any difference from stock.

so in other words bigger cam + bigger stall = better street ability?

My 3400 converter is perfectly fine around town.

See and i just dont know what stall i want to go with yet either basically i am trying to find a starting point and build around it...?

6speed ftw

cc503 is a good cam id say.

I am going to do a 6-speed swap some day but for now ill manage with the 4l60e.

I have a 306 I'll sell ya if you decide to go with that cam.
Never used, brand new.

Alright i will let you know if i decide to go with that cam...may i ask why you never used it tho?

[DETROITMUSCLE]

a bigger stall is never better drivability, but something like a 3000 converter you'll hardly notice any difference over stock just driving around town, once you go WOT you will know its there but my point was don't be afraid to drive around a little bigger converter.

[white97z28]

a bigger stall is never better drivability, but something like a 3000 converter you'll hardly notice any difference over stock just driving around town, once you go WOT you will know its there but my point was don't be afraid to drive around a little bigger converter.

Yea i planned on running a 3000 stall im just trying to find a cam to match it.

[c0ncEpT]

Yea i planned on running a 3000 stall im just trying to find a cam to match it.

Your going to want something a bit smaller than a 847. Something with a bit less overlap if your looking for low end power. DCR is also very important when looking for bottom end power.

The right Valve events are key for choosing a cam for your set up and making big power.

[ThreeHonks]

gm847 is not the best choice for you. Its is one of the better off-the-shelf cams for the LT1 but there are a lot better choices out there.

With the new aggressive lobes, get something custom ground in the 22x/23x range.

[N2OfedLT1]

I totally agree with the concensus of the people posting in this thread.

I have had a few different cams in my 94 Formula

236/242 .568/.568 110lsa .... ported LT1 heads/cam/T56...good top end power but gutless down low.....never dyno'd

222/228 .544/.538 112lsa...396/ported LT1 heads/T56....torque monster/street sleeper. Car made 400lb/ft from 2400+rpm and 422rwhp

then ran this cam behind a 700r4 with a 3200 stall...perfect street manners and snuck up on alot of cars in my area. Idle'd smoother than a stock cid LT1 with the LT4 Hot cam...but trapped in the 130's on the bottle

246/254 .613/.590 112lsa 396/ported LT1 heads/700r4 3200 stall....lost low end grunt but screamed above 4000rpm....picked up .3 NA with the cam swap...but Idle and street manners suffered.
Idle clip of this cam
http://www.youtube.com/watch?v=06B7mhgE8rg

For a shelf cam I would suggest one of the new Comp XFI grinds either the 07-466-8 for better street manners or the 07-467-8 for a little more power.

Both will require the usual spring/retainer/rocker arm upgrades.

The XFI cam lobes are very aggressive and were designed for fuel injected applications. These cams will make better power and have better manners than the older CC306/503 or the crane/GM 847.

If you want send me all the details on what you have done now and your very near future plans and I can help you pick a cam. I am also friends with Lloyd Elliot and if a custom grind would be better for you I can help their also

[white97z28]

Your going to want something a bit smaller than a 847. Something with a bit less overlap if your looking for low end power. DCR is also very important when looking for bottom end power.

The right Valve events are key for choosing a cam for your set up and making big power.

DCR? Valve events?

I totally agree with the concensus of the people posting in this thread.

I have had a few different cams in my 94 Formula

236/242 .568/.568 110lsa .... ported LT1 heads/cam/T56...good top end power but gutless down low.....never dyno'd

222/228 .544/.538 112lsa...396/ported LT1 heads/T56....torque monster/street sleeper. Car made 400lb/ft from 2400+rpm and 422rwhp

then ran this cam behind a 700r4 with a 3200 stall...perfect street manners and snuck up on alot of cars in my area. Idle'd smoother than a stock cid LT1 with the LT4 Hot cam...but trapped in the 130's on the bottle

246/254 .613/.590 112lsa 396/ported LT1 heads/700r4 3200 stall....lost low end grunt but screamed above 4000rpm....picked up .3 NA with the cam swap...but Idle and street manners suffered.
Idle clip of this cam
http://www.youtube.com/watch?v=06B7mhgE8rg

For a shelf cam I would suggest one of the new Comp XFI grinds either the 07-466-8 for better street manners or the 07-467-8 for a little more power.

Both will require the usual spring/retainer/rocker arm upgrades.

The XFI cam lobes are very aggressive and were designed for fuel injected applications. These cams will make better power and have better manners than the older CC306/503 or the crane/GM 847.

If you want send me all the details on what you have done now and your very near future plans and I can help you pick a cam. I am also friends with Lloyd Elliot and if a custom grind would be better for you I can help their also

Well sadly as of right now the car is complety stock except for the hypertech i bought and catless 3inch cat back. I have just been planning a project for the winter and am trying to find exactly what im going to do...as of right now my plan is to get the heads ported, springs, rockers,etc... a cam, ls7 lifters, a stall (whatever is applicable, was thinking 3000) shift kit, 3.73 gears to replace the 2.73 and i know there is probably other things i need or should get...i kinda learning everything as i go. Oh and i also am looking to get LT Headers and a cai.

[MunsterZ28]

long tubes are a must if you want that engine to exhale properly everything its inhaling with ported heads and a bigger cam.

[white97z28]

long tubes are a must if you want that engine to exhale properly everything its inhaling with ported heads and a bigger cam.

I know its a must thats why i forgot about it lol just like i didn't put down that i need sub frame connectors...because i know i need them its a must lol

[JoeliusZ28]

was the hypertech a recent purchase? because if you can return it, it will be worthless once you do a cam and a stall. you will need a real tune.

[white97z28]

It was used i got it in a trade im most likely going to sell it to one of my buddy's. And i didnt know until after i traded that it would be useless.

[N2OfedLT1]

the XFI 467 will work well for you....with the mods you have planned.

its on the aggressive side but not crazy

Also...upgrade the fuel pump...go with the racetronix kit now...you will thank me later.
It should be the first mod performed on a LT1 in my opinion.