Any thoughts on this custom grind?
02-24-2003, 11:51 AM
#1
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Any thoughts on this custom grind?
My engine builder recommended a 234/242, .598, .598 lift (with 1.6), on a 112. He said he was going to use XE ramps.
As of now my heads are stock, and will be when the cam goes in. The will get ported however as soon as money permits.
Tuning will be done (duh).
I have seen that custom grind idle/run on stock heads before, but unfortunatly the guy never ran the car, and still has stock manifolds (long story, lol). It doesnt idle as bad as some think.
I dont mind spinning high, i have 4.33s to get me up there. Im guessing the cam will run to 6700 or so.
Just wondering if anyone had some thoughts on this cam, or suggestions.
Jared
p.s. I know this is a big cam, but i wanna go fast! I am aiming for mid to high 11s on stock bottom end and 400+ rwhp after my heads are done (280+).
As of now my heads are stock, and will be when the cam goes in. The will get ported however as soon as money permits.
Tuning will be done (duh).
I have seen that custom grind idle/run on stock heads before, but unfortunatly the guy never ran the car, and still has stock manifolds (long story, lol). It doesnt idle as bad as some think.
I dont mind spinning high, i have 4.33s to get me up there. Im guessing the cam will run to 6700 or so.
Just wondering if anyone had some thoughts on this cam, or suggestions.
Jared
p.s. I know this is a big cam, but i wanna go fast! I am aiming for mid to high 11s on stock bottom end and 400+ rwhp after my heads are done (280+).
02-24-2003, 12:18 PM
#2
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You hit most of the points yourself.
I'll just add:
That cam is a high-end cam. You'll have to rev the hell out of it and launch it at a higher rpm to really benefit from it. I had a 234/239 cam in my 350 LT1 that sounded much crazier than my 396 does now.
You're pushing the envelope, but I don't think that cam is a terrible idea. It just wouldn't be my first choice for a stock-bottom end car.
Mike
I'll just add:
That cam is a high-end cam. You'll have to rev the hell out of it and launch it at a higher rpm to really benefit from it. I had a 234/239 cam in my 350 LT1 that sounded much crazier than my 396 does now.
You're pushing the envelope, but I don't think that cam is a terrible idea. It just wouldn't be my first choice for a stock-bottom end car.
Mike
02-24-2003, 09:59 PM
#4
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Bigger is not always better! I don't think the driveability of that cam on stock heads is going to be pretty. When you get the heads ported it will get better but I still don't think it will be very good. I like the lift numbers. To make good power I think you'll be spinning the bottom end awefully fast though which is not the best idea. If I were in your shoes I'd go with a lot less duration and the same lift maybe a little less (to make life easier on the springs) - how about something along the lines of a 228/236 - you'd keep the same i/e ratio if that's important.. and that's still a pretty big cam IMO.
If you don't care about driveability and just want a big f'ing lopey cam then just make sure you have some strong springs since that's a lot of lift and you'll be spinning some high rpms on that cam - two things that make for a tough life for valve springs.
To elaborate what I said above about this cam being a bad bad choice for stock heads even if it's only temporary... That kind of duration is borderline on too much IMO stock heads or ported unless this car is a track queen. This is further compounded by the high lift numbers you have. Stock heads can't flow fer sh*t at near .600 lift.
Again, bigger is not always better
If you don't care about driveability and just want a big f'ing lopey cam then just make sure you have some strong springs since that's a lot of lift and you'll be spinning some high rpms on that cam - two things that make for a tough life for valve springs.
To elaborate what I said above about this cam being a bad bad choice for stock heads even if it's only temporary... That kind of duration is borderline on too much IMO stock heads or ported unless this car is a track queen. This is further compounded by the high lift numbers you have. Stock heads can't flow fer sh*t at near .600 lift.
Again, bigger is not always better
02-24-2003, 10:41 PM
#7
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Originally posted by atljar
I know its going to rev high, I have the gears to do it with though as i said. Also i might put it in a little advanced to back it down some.
I know its going to rev high, I have the gears to do it with though as i said. Also i might put it in a little advanced to back it down some.
im 236/242 in a 383 with 5.74 exhuast (forgot intake, much less) on 112 lsa and i'm looking at 6800-6900
02-24-2003, 10:48 PM
#8
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Trey-
I dont think it will run that high. A buddy is running it in a 383 and shifting at 6800.
Here's something i graphed out using desktop dyno. My LT1 program that i put together is VERY accurate. Thas has the cam installed 4º advanced. This is using stock TB, and stock heads. 400 fwhp not too shabby and its running to about 6700.
http://home.cinci.rr.com/atljar/dyno.jpg
I dont think it will run that high. A buddy is running it in a 383 and shifting at 6800.
Here's something i graphed out using desktop dyno. My LT1 program that i put together is VERY accurate. Thas has the cam installed 4º advanced. This is using stock TB, and stock heads. 400 fwhp not too shabby and its running to about 6700.
http://home.cinci.rr.com/atljar/dyno.jpg
02-24-2003, 10:50 PM
#9
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No No No... running advance is like a patch. You're getting a custom ground cam, there's no reason not to get it right. With the right cam you shouldn't have to run any advance because it's the right cam.
I really think driveability is going to suck with that cam.. and worse still, I think you'll be spinning the bottom end way to fast. So you'll either be gambling with the bottom end to use all the power this cam is making OR you'll be missing out on a lot of power because you don't want risk it. I agree with trey, you'll be spinning that thing over 7k.. Hell, even if you do only spin it to 6.7k or 6.8k on the stock shortblock you're just begging for an accident.
Just downsize that cam a little bit...
So many people here seem to equate a big cam with a
big d!ck
Trey's got a 383 and look at the cam he's running, it's no bigger than what you've got planned for a 350.
Good lord, never mind, I go to edit my post and you guys must have made three or four more in the 3 minutes it took me to add this little bit. Wow
I really think driveability is going to suck with that cam.. and worse still, I think you'll be spinning the bottom end way to fast. So you'll either be gambling with the bottom end to use all the power this cam is making OR you'll be missing out on a lot of power because you don't want risk it. I agree with trey, you'll be spinning that thing over 7k.. Hell, even if you do only spin it to 6.7k or 6.8k on the stock shortblock you're just begging for an accident.
Just downsize that cam a little bit...
So many people here seem to equate a big cam with a
big d!ck
Trey's got a 383 and look at the cam he's running, it's no bigger than what you've got planned for a 350.
Good lord, never mind, I go to edit my post and you guys must have made three or four more in the 3 minutes it took me to add this little bit. Wow
Last edited by Lost; 02-24-2003 at 10:58 PM.
02-24-2003, 10:53 PM
#10
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Originally posted by Lost
No No No... running advance is like a patch. You're getting a custom ground cam, there's no reason not to get it right. With the right cam you shouldn't have to run any advance because it's the right cam.
I really think driveability is going to suck with that cam.. and worse still, I think you'll be spinning the bottom end way to fast. So you'll either be gambling with the bottom end to use all the power this cam is making OR you'll be missing out on a lot of power because you don't want risk it.
Just downsize that cam a little bit...
So many people here seem to equate a big cam with a big d!ck
No No No... running advance is like a patch. You're getting a custom ground cam, there's no reason not to get it right. With the right cam you shouldn't have to run any advance because it's the right cam.
I really think driveability is going to suck with that cam.. and worse still, I think you'll be spinning the bottom end way to fast. So you'll either be gambling with the bottom end to use all the power this cam is making OR you'll be missing out on a lot of power because you don't want risk it.
Just downsize that cam a little bit...
So many people here seem to equate a big cam with a big d!ck
bigger the better so long as you use it all
02-24-2003, 10:55 PM
#11
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Originally posted by atljar
Trey-
I dont think it will run that high. A buddy is running it in a 383 and shifting at 6800.
Here's something i graphed out using desktop dyno. My LT1 program that i put together is VERY accurate. Thas has the cam installed 4º advanced. This is using stock TB, and stock heads. 400 fwhp not too shabby and its running to about 6700.
http://home.cinci.rr.com/atljar/dyno.jpg
Trey-
I dont think it will run that high. A buddy is running it in a 383 and shifting at 6800.
Here's something i graphed out using desktop dyno. My LT1 program that i put together is VERY accurate. Thas has the cam installed 4º advanced. This is using stock TB, and stock heads. 400 fwhp not too shabby and its running to about 6700.
http://home.cinci.rr.com/atljar/dyno.jpg
why not go smaller and use it all?
why the hell not get an Lt4 hotcam and ported heads and do the same
man is it gonna suck *** to drive that cam daily
02-24-2003, 10:55 PM
#12
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lol at you guys.
I just changed the program around a little. Put on a set of ported heads flowing 295, and opened up the intake. Power moved up to 7500. Ouch. God i hate cam selection.
I just changed the program around a little. Put on a set of ported heads flowing 295, and opened up the intake. Power moved up to 7500. Ouch. God i hate cam selection.
02-24-2003, 10:56 PM
#13
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Originally posted by atljar
lol at you guys.
I just changed the program around a little. Put on a set of ported heads flowing 295, and opened up the intake. Power moved up to 7500. Ouch. God i hate cam selection.
lol at you guys.
I just changed the program around a little. Put on a set of ported heads flowing 295, and opened up the intake. Power moved up to 7500. Ouch. God i hate cam selection.
sorry
at what lift
02-24-2003, 11:02 PM
#15
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My cam is a 232/242 544/560 110lsa and is supposed to make power up to around 6800.. I will not be able to find this out for a long time though.. I have driven the above cam on the street last summer with a 6-speed and it wasn't that bad.. kinda suck leaving stop lights with the stock 3:23 gears.