stangbang

What cam are you 388 all bore's running. What size fuel inj?

Visceral

iTrader: (1)

MTI X1 (230/227) on a 114, with 30 lb injectors.

I havent gotten it in the car yet. Its "in the mail.", so take this with a grain of salt.

chris

2001CamaroGuy

iTrader: (6)

If/when I do my 388, I'm going BIG.....

reason:

the TR 230/224 is becoming a standard size for 346s so a "comporable cam" in a 388 is going to need more durration to run the same (fill the cylinders).....


So I'm planning:

either a 236 or 238 durration on a 110 or 111 LSA if I do hydrolic lifters....

OR...

if I go solid lifter (which I'm really considering), I'll go with something like a 244 or 246 on the same LSA (since solid needs a about 10 degrees more durration than hydrolic).....


this is my daily driver....BUT....realize this is going in an M6 car so I'm not too worried about idle quality and can always just up the idle rpm some if needed....(you didn't say what tranny you have).

DONAIMIAN

iTrader: (18)

the TSP 232R looks to be worthy. You might wana try the ASA cam.

Fenris Ulf

Just take a cam with idle qualities and power you like for a 346 and add about 6 degrees to the intake and exhaust.

Linear Velocity

iTrader: (1)

Tiny cam here in my 388: 243/250 .610/.612 114 LSA Idles great and is perfectly driveable, SVO 30# for my car too, stock 99 ones definitely were not enough.

2001CamaroGuy

iTrader: (6)

Linear.....four questions:

1) are you running hydrolic or solid lifters on that 243/250 cam?

2) where did you get it?

3) why did you go so much exhaust vs. intake durration?

4) where does the cam peak at with the 114 LSA?

Linear Velocity

iTrader: (1)

Camaro Guy:

1) It is a hydraulic cam.

2)Andy's Auto Performance (AAP). It's their J2 cam (after me ), they are a sponsor on this site. (626) 447-3707 call and ask for Mark.

3)I don't know for sure, you'd have to call and ask AAP. I have a pretty beefy exhaust setup (1 7/8 headers, dual cutouts), maybe the extra exahust was to take advantage of that.

4) I made peak power just a little shy of 6300 rpms on the dyno.

Hope this helps. ~Tony

SMOKINV8

iTrader: (6)

That's kind of backwards from how I think it should be. It sounds to me like it's set up for nitrous.

More duration helps the lack of high flow #'s. So a higher intake duration than exhaust would make up for an intake setup that didn't flow as well as the exhaust, where as a higher exhaust duration would make up for a more restrictive exhaust vs. the intake. This is for NA only. With FI and nitrous, you need more exhaust flow than with NA.

Velocity- Would you mind sharing what your shortblock cost?

Linear Velocity

iTrader: (1)

Yeah, again that was a guess. I originally was going to go with a 236/238 .610/.612 111 lsa cam, but I told AAP that I wanted to push the envelope a little further So again, it was AAP's choice for the cam, maybe Mark from AAP will chime in. I paid around $4k for the block, it is an LS6 non-darton sleeved block.

2001CamaroGuy

iTrader: (6)

Did you ever get my email I sent you? I would like to get in touch with the shop that did your block to see if I can get the same sleeves you did.

ezss

I going to be trying a third cam for my 388 fairly soon, so here is my input:

Any cam you could use on stock displacement, such as 230/224, 229/229 is too small. The displacement will just eat it up.

My first cam was a 232/236 MTI R1. I think you can stick this in an aggressive stock displacement h/c setup...it was too small. Torque was awesome but peak hp was 6k rpm.

Second cam was a 242/242 595 112 lunati. For me, it made about 14 rwhp peak more than the 232/236, at a cost of 7 rwtq peak. However, I lost a lot of torque in the lower rpm band, too much in my opinion to make it worthwhile.

Now I am going to downgrade a bit and go with either a comp XE-R type 236/236 587 (new Z1 cam offered by MTI) or 238/238 585

I am running around 10.8:1 CR and my goals are street and strip -- I want something that is fun to drive and not just all top end.

I am currently using 42# FMS injectors, for whatever reason the 30 lucas ones were not enough, and I was running out of fuel at 5900 rpm, with AF hitting 14 at 7k rpm.

Fenris Ulf

The cam I am running has almost 20 degrees less total duration at .050" of lift than the one Linear Velocity posted specs on. Just goes to show you don't need a huge cam to make incredible power with an all-bore.

2001CamaroGuy

iTrader: (6)

Fenrid Ulf....so then whats your secret....what else do you have done to the car?

383ss

iTrader: (14)

good info ezss!! I just have a little 383 stroker, but cam sizing should be very similar.
I think a 230/227 would be too small.
I've gone through 2 aftermarket cams in mine.
224/224 .539 114lsa. made my car sound STOCK but made 448rwhp/439rwtq. kinda cool having an 11 sec sleeper car.
236/232 .602/.575 112lsa made 457rwhp/448rwtq and gave up nothing down low. sounds great too.

when I go SR and get an aftermarkt intake I'm gonna go about 244/244. .600ish lift.

Fenris Ulf

No secrets other than the cam specs. Heads aren't even LS6 heads and flowed less than 300 cfms on the intake at max cam lift, also goes to show that max cylinder head flowrates don't mean **** (although they produced incredible low and midrange flow figures). Dyno was with less than a hundred miles on the engine through full exhaust and three pulls of tuning. Max timing advance is around 24-25 I believe. The engine definately has more in it, I am sure I could get very close to 550 rwhp with the addition of a reverse-cooled electric waterpump, a bump in timing and open headers.