383transam

iTrader: (1)

I called Lunati to get a cam spec'd for me the other day and they called me with the numbers today, I dont really know if it will work well with my combo. I have a stock 2000 ls1, vic. jr intake, holley 750 carb, powerglide tranny w/trans brk, 4000 fti stall, and 4:10 gears in a 1989 mustang notch. I want a cam that makes good power N/A but will respond well to the 150hp nos cheaters kit that I will be using. I will be driving the car some on the street so I want to have decent torque around town but will be spraying occasionally at the track. The cam they specd for me is 278/286 advertised 227/231 @.050 .651/.651 108deg lobe. I figured I needed a little more exh. duration for the bottle to help evacuate the cyl. better. Any help will be greatly appreciated!

00MaroonZ28

iTrader: (3)

I'd extend the exhaust a little bit more.

LS1C5Vette

iTrader: (11)

I agree, bump it out to at least a 236 on the exhaust, also I dont think all that lift is necessary. Also a 108 LSA is going to be SUPER lopey. The cam I have is great for nitrous (Im not running nitrous tho)

batboy

iTrader: (6)

Man, that's a lot of lift, check the PTV clearance. I have a Thunder Racing 230/236 .592/.602 112 lsa that works great with nitrous.

Scooter76

That cam will be very hard on valvetrain with a shorter duration and huge lift ! Also the 108 Lsa is way to tight for the spray to get the most out of it ....Try a Tsp MS3 or MS4 and use a 112-114 Lsa , I am using the MS3 237/242 @.050 603/.609 lift 113 Lsa . These cams are pretty aggressive but do work very well with a 150-300 shot !

02*C5

iTrader: (1)

Lift has very little to do with PTV if any in these engines you r looking at duration that has more to do with PTV than anything else.

The cam can have 700 lift its how long it stays open that gives you the issue, the longer the valve stays open the more of an issue you will have with PTV.

383transam

iTrader: (1)

Thats what I thought. So do you think this cam will have a ptv clrearance issue?

00MaroonZ28

iTrader: (3)

It depends if the heads are milled. You'll be fine if they are the stock cc. I'm pretty sure you'll be able to get by with milled heads also.

One thing I'd do is lower the lift on the cam. You don't want to be replacing valve springs every 6-8 k miles

02*C5

iTrader: (1)

Well like I tell every one I would check PTV regardless who tells you what. I do not see a problem. You need more LSA on that cam if your planning to go nitrous. A 112 to 114 would be better if I am wrong some one will correct me.


Secondly if you have the right spring set up for your cam there should not be an issue with having to do spring changes every 6 to 8K miles. I am running a 23X/24X 614/614 112 on my daily driver. I have Comp 921s and no issues at all. She has 90K on the clock.


Good luck.

383transam

iTrader: (1)

I finally got a cam ordered today but I'm still leary of what it is going to run like. I got it from lunati and the specs are 238/243 @.050 .600/.600 lift and 112LSA. Keep in mind that this is a bone stock 2000 ls1 with a vic. jr and a 750hp carb with a 150 shot. Will it make good power on and off the bottle? I ordered lunati's new gold spring kit good for .660 lift. I am undecided on lifters and pushrods(length), I'm thinking ls6 or ls7 lifter for the money. Give me your opinions.

383transam

iTrader: (1)

Anyone have thoughts on how this combo will run/sound?

02*C5

iTrader: (1)

do stock lifters that's what am running i can pm you a link to who sold them to me if you want it $100 for the set and they are new not rebuilds, or if you want peace of mind do Morels. secondly "How is going to run..." has a lot to do with final tune. Even if you have the perfect set up the tune is 90% of how your car is going to run. Push rod length should be done at the end and do not take any one advice on that use a collapsible pushrod (Texas Speed has them for a great price) to get the correct length. I think you have your bases covered well.

enjoy and keep us posted.

orangeapeel

iTrader: (18)

I havent ever seen a cam that didnt respond well to nitrous really...Not to many people run a reverse split pattern in these cars unless they have some sort of weird N/A goal. Most off-the-shelf grinds are traditional splits...ie: a nitrous grind. 112 is about as low as I would go if my major go factor was going to be nitrous. 115 is what I ran personally. 244/248 .595/.595 115+2 to be exact.

383transam

iTrader: (1)

Thanks to all on your input, hopefully in a couple months I will have this thing on the track and see how she does!