Which cam to use on 10-1 Stg2 TE SP2 intake? 84 t-type with..

I was trying to decide which cam to run on my latest project, an 84 t-type with JE 10-1 pistons, bowl cleen up on the TA stg 2 TE heads. The rear gear will be a spooled 4-11 or so and a converter set up more for the track, not sure who's yet or the exact stall - 4000 ish.

The body has been lightened a bit. Glass front bumper,mounts ,hood, manual steering box, brakes etc. Should be around 3100 when completed. The suspension is Moroso springs, comp eng 90-10's in front, rear boxed control arms,air bags, heavy springs and shocks... :blast:

 

My question to you is why TE's with 10-1 compression? With aluminum heads it will perform like 9-1. I would say 308s, but your compression is low. Shave the heads, 11-1 is streetable with aluminum heads. Just my thoughts. o No:

 

Since you are running the spool, it is not the most streetable (but of course some of us do it anyway) you should run more compression, and the 308 is; and or was a great cam, however I would get one custom made for your combination. They dont cost anymore and are just about as fast to receive one plus there will be a significant power increase. Just my opinion of course.

 

Intake closing point....

Your intake closing point will make or break you at 10.0 compression. I wouldn't worry about working too hard to get compression since with good heads you'll still make good power. You will want to stay under 255 degrees duration on the intake and make sure to install it 4 degrees advance. It is good advise to get a custom cam ground. I say with 10.0 compression, spray it! Nitrous works great with 10.0 compression! Nitrous will make all the cylinder pressure(compression) you need.

 

My first thought was 11-1, but "more Power" in Grand Rapids cautioned about Spark knock... I could still shave the heads because TA is about three to four weeks behind. I would have no problem installing a spark knock sensor to help with the MSD stuff...

Have any of you run the TA ST 2 TE's with similar combination using 11-1? I would rather not mix gas if possible.

The spool is cheap -- otherwise I would try a locker. Who grinds good special cams? I have been out of engines for ten years and this is my first cool motor (I.E. bbb) .. :blast:

 

Ta Stg 2 Te

YES on The NOS !! however, the rods are stock unless I find some cheap aftermarket rods within the next few weeks.. Oliver Racing is one of my customer - snicker, but aparently I'm not that good cuz I'm still working on them for a set (I'm in sales). The rod beams are polished and they have ARP bolts - TA said stay away from NOS cuz you should be around 600-650 with my set up and the stocker rods will be screaming at that!

I'll be printing this -- good information on the intake closing deg..

Do you know if the TA ST2 TE's are good enough for this combo out of the box? or should I pass them over to a porting nut? :blast:

:3gears: ...

 

you have a similar set up as im going to.i have a spool and 4.10s in my
8.5,welded axle tubes,girdle,moser big bearing axles in my regal
with a 455/400 sp1 with 1050 dominator.have a new motor inthe works
with ta st1 se alum heads just under 11 to 1 and 308s looks like the cam
to beat.it is well proven cam and should work on pump with no problems
im not using stock rods , stockers are at there limit at this level and with
this much $$$ spent on my engine/heads why risk losing some costly parts/
damaged block,heads and the machinework at this point.

andy

 

I was just talking with Jim Burek of P.A.E. ENTERPRISES down in Texas. I have a smilar situation to you guys above with my Regal. He was telling me about a cam similar to the 308S cam, but with a slightly different profile and it was generating about 40 more HP in the same engine. Might be worth giving him a call.

I did not get the particulars on the cam as I don't even have my heads or new pistons yet.

http://www.paeenterprises.com/paeframe.html

 

40 ponies is a ton :grin: , how accurate can he be since he is selling the cam? The company seems to be going head to head with TA on Everything they sell --- ?

I see the 308 in many combinations and I am beginning to see it as a buzz word more than the "perfect" cam, however I agree that it will get me started should I choose it.

Keep chatting, I'm open and greatfull to suggestions - :blast:

 

Call Scott Brown he's up in your area and has made a ton of power.2 of his flat tappet grinds are in the 9's in full weight GS'S 3700lb's.http://www.straightline-perf.com/ or call Bobb Makley or Geof Ketchum at Finishline motorsport they sell Straightline stuff http://www.finishlinemotorsports.com/

 

help?

I am building a similar combo, my engine should be around 10.6 to 1 compression and an old Kennebell cam grind.

.Lift .499 .499
Duration 320 322
Open 47 104
Close 93 38
Center 118
Ratio 1.58

@0.50" Intake Exhaust
Duration 248 266
Open 11 76
Close 57 10
cam advance 5
Intake center 113

Stage 2 TE heads,Level 2 porting 2.25" intake, SP2 intake and 2 1/8" headers. I have tried to figure the dynamic compression using a calculator. It wont work. The numbers I am trying to determine are the lobe seperation, I thought that was 118 degrees but I must be wrong. Little help?

 

Good stuff. I talked to Bobb M the other day and you are correct, his shop is less than 45 min from my house :3gears:

I'll be headin' over there some time next week for some bench racing - :beer

 

KB cam

AH! KB C107-118 :grin: The money your saving on your heads should buy you a nice new cam :laugh:

 

It wouldn't be a bad cam with more lift, nitrous, and 112LC. That cam is giving up a good bit of power with the 118 lobe seperation. Your giving up power on the compression stroke by closing the intake valve late and by opening the exhaust so early on the power stroke. Stg 2 TE heads have a good flowing exhaust so you don't need much of a duration split unless you put a big power adder to it.

Stock rods will take a pretty good beating if you throw a light piston on it and keep the rpms down. The general problem is without a power adder, you have to turn the rpms up to make power. SO with added power and rpm(usually above 6500) things start crossing the reliability threshhold. Cylinder pressure/high compression also is hard on rods so with your compression and a light piston I wouldn't be scared of nitrous as long as you keep the revs to 6200 or less. But thats just me :grin:

 

N2o

Rick, believe it or not you can build a nice combo with out the sauce :laugh: he's got big heavy pistons, like I told him if he doesn't go easy on it he'll be sitting on the side lines watching instead of having fun. Gerry on here (gotbuick) has a 10 sec street car with 9.3:1 compression SGT 2 SE head, small cam, with that same heavy piston. Tom Hearsey has 9.5:1 SGT 2 SE head, small cam, HEAVY car, he runs 11.40's. Steve's TE's Should kick the crap out of those SE's + 10.8:1 compression, in my opinion he should run a bigger cam to keep the cylinder pressure down with this combo, don't spin it pass 6000 rpm and set the rev limiter at 6200 rpm. TE head,External balance,heavy piston, almost 11.0:1, no hard block and no girdle hmmm tic tic tic tic. Steve, run the heads with the STG 1 valves and don't 0 deck it run a small cam if it's not to late. These are things you can do later if its not fast enough for you, It will make the differance between driving it and enjoying it or sitting on the out side looking in. Rick are you gonna be out this year or are you still waiting for the block of dreams. Chris

 

Revised plans ?

Chris, I appreciate the advice. I am going to call the machine shop tomorrow and see if I can halt the zero deck on the block. I figure I'll just have them clean it up. Back down the Stg2 te heads to the smaller intake and only have them do a bowl blend. I would like to comfortably put my car in the mid 11's with no nitrous. My one saving grace is that I can't really see myself flogging my car at the strip every weekend. I did that years ago and even if I went crazy bracket racing, my work schedual would only allow half a season. I would like to build as much horsepower as I can with out overstressing the bottom end and being reliable.
Is an SFI balancer a must? Would lighter weight pistons be of major benifit? If I build a lower compression shortblock. say 9.5 to 1, what cam? If its to late to halt the zero deck and Im at 10.6 to 1, then what cam?

Also what valve springs should I run? I dont want to run the roller rockers. I plan on new stock replacement rockers and shafts.


BTW...Anybody what an antique KB cam?

 

What do you consider heavy pistons? I have the JE "dished" 10-1 pistons from TA- these along with stg 2 TE's.

 

heavy pistons

Chris is refering to the old speedpro forged pistons I have in my combo. I believe the JE pistons are pretty light. Any specs on them?

 

they should be around 850 grams with pin. 1/16" plasma moly rings. Very slight dish on the top #1611B from TA on page 73 of the spring '05 cat.

I think the FM forged pistons are around 1000 grams, not sure if the pin was included with ?

:blast:

 

Me?? Out this year? If I have anything to say about it, I'll be at the Nats running Limited Street. I am still in line for a block but waiting? Hell no. It's going thru the light or going in the pan. One of the two.. :TU: Kevin says if I don't put it in the pan it's because I didn't put a good enough "tune-up" on it.. :laugh: Your right, I don't believe in not spray it or anything. No matter how fast you get it on motor, it's always faster on spray, BUT its better to be racing that sweeping up a bunch of pieces. I see WAY too may motors coming apart from oiling than power which is just sad. It you going to blow it, do it going fast not slow. :Brow: