LilJayV10

Ok guys I am starting to plan this build up starting this week and start getting parts together. I am going to do a build up for FlyboyZ28. We have pretty much decided on everything with exception with the cam. I would like some advice/experience/opinons on the build up because this is my first LT1 build up. I plan on updating the thread with progress of it. I did a build up of my 406 on the thirdgen.org board and there was alot of intrest. This is what we know as of right now

93Z
355, stock crank/rods good pistons
TEA ported LT1 heads, 265/232 @.600 lift
MAC headers, ORIP, stock catback, flowmaser muffler
Underdrive pulleys
3.73 gears, automatic car

I talked to brent a while back at TEA about this build up. The thing that we havent decided on yet is the cam, Brent said they use the 230/236 cam w/ their 11 second package, he said that this is streetable and can obtain decent fuel mileage. next he said we could step the cam up to the cc306 but would need a little bigger stall but still streetable.
What would be a good cam for this setup?
Also compression ratio?

Last question, what about the water pump? I know things were different in 93, would it be easier to go with a CSI water pump and forgo the dowel pin problem?

Any help would be appreciated. I am planning on talking to Brent again this week about the cam.

Thanks
Jason

J's 82

could go with the gm 847..

on the water pump deal.. go with a meziere or csi get rid of the water pump drive and put a dual roller timing set in there instead of the single roller LT1/4 setup.. I think that would be a worthwhile upgrade with that engine..

97WS6SCharged

I thought the dowel pin drove the Opti, not the waterpump Anyway, I would plan on using a good set of ARP bolts all through the thing. As far as compression goes, I would probably shoot for around 11:1 compression.

Either cam would be good, the 306 with 1.6 rockers should put you at .540/.576 lift which I think would work well with the heads you have.

Go with the CSI waterpump, I like mine and it's reliable for a daily driver.

LilJayV10

What are the specs on the cc306 cam? Also what about the 236/242 cam? I am doing to do some searching and see what others have.

96LT14u2Nv

i recommend the 230/236 exteme cam. i have it in my auto and with a 2800-3200 stall, it is awesome. i went 12.1 with this cam and 3.73 gear and bolt ons. i likes to rev(about 6500) but with those heads, this cam would ROCK.

LilJayV10

I have been doing some searching. So far the 230/236 cam looks good. It's amazing, I read two posts about a certian cam is bad, then read two more that say its great and theirs no problem. Its a street car, and an auto at that and I don't want to have to sping 6500+ to make good power and I definately don't want to loose a bunch of low end, which was one of the main complaints with the cc306. I think the 236/242 would probably be to big, but thats just my opinion right now, it could change.

mastrdrver

Where is this car spending most of its time is the big question, daily or not? I would say to go with a 214/224 .565/605 (using 1.6s) and run 977s. If you want a little more you could step up to a 224/230 .605/584 (1.6/1.5). I would run the first on a 108 or 110LSA and the later on no narrower then 110LSA. The later cam will sound like a cc306, but have a lot more punch on the bottom end. Both cams will not sacrific too much on the low end and will more then likely peak out at about 6000. I want to run one of these cams in my car, but I dont have the money. Both will require you to run CC 977s though.

FlyboyZ28

Hey Jason when you read this give me a call...i'll be in town till sunday. And the car has to be able to be daily driven. It will prolly have a 4 hour road trip to do once a month.

Thanks
Dan

got_hp?

id get a better exhaust setup........why use the stock catback and slowmaster?

LilJayV10

I agree, but thats whats on the car right now, and because of cost it will stay there for a lil while.

As Flyboy mentined, a power peak around 6000 is what he wants. What do you guys think about the 230/236 cam with 1.7 rockers? It would use more of the heads potential.

97WS6SCharged

What would be the point of using 1.7 rockers? All you're going to do is mess up the valve train geometry. Use the cam to get your lift and stick with 1.5 or 1.6 rockers. If you decide you like the 230/236 cam but want more lift, have Comp do a custom grind on the cam.

LilJayV10

The point is to use the 230/236 cam profile but with more lift, to take advantage of the TEA heads that flow to .600.What's the difference in getting the lift from the cam or the rocker arm? Is there one better than the other? This is why I ask questions

Thanks.

dkeers

The rocker does not just move up and down, the tip follows a curved path. The higher ratio rocker you use, the more "arc" the rocker has in its motion. That is what can cause valvetrain geometry problems. The only reason (I can see) to use a high ratio rocker, is if you need more lift and don't have the time (or money) to change the cam. Since you are putting a new cam in anyway, just get the lift you want built into the cam. I used 1.5 roller rockers on my car to get the lift I wanted with my cam.

I recently read about an engine building contest (I don't know all of the rules) where the winner used something like 1.2 rockers on the intake and 1.3 on the exhaust, with a cam that had a lot of lift. He said after a lot of testing, this made the best horsepower.

Dustin

mastrdrver

Another thing about about using higher ratio than stock rockers is that they accelerate valve guide wear. If you really want more lift then a regular 230/236 cam get the same cam with faster lobes and have .584/.585 lift.

LilJayV10

I guess that makes sense. I have a question though, why did GM put 1.7 rockers in the LS1? 1.8 RR are a common mod for them. The LS1 is one of the most technological pushrod engines ever, there has to be a reason they went with the 1.7's. I am not flaming just asking questions.
Thanks