XtremeDime

iTrader: (16)

Which one do you guys think for a turbo ls1(346)?
Virginia Speed VTC 2
23x-22x .610x-.60x, ?? LSA

Speed Inc TU1
223/225 .581/.581 113 LSA

Brute Speed FI cam
232/240 .595/.608 115 LSA

LS9 Cam
211/230 .562/.558 120 LSA

dschmittie1

iTrader: (64)

I think I would do either the VA speed or Speed inc cam as they are actually intended for Turbo cars. The Brute speed cam is more for Blowers and the ls9 cam just happens to do well on boost.

hellbents10

iTrader: (10)

With a MP T70 I would run the Speed Inc. grind.

98Z28CobraKiller

iTrader: (17)

You need to give more info. Atleast the size of the exhaust housing of the turbo. If you are using a single MP T70 with a 3" dp, I would for sure be looking at a reverse split like the VA Speed cam.

Phil99vette

iTrader: (11)

I'd look for a reverse split and the va speed is on the only one that fits the bill.

XtremeDime

iTrader: (16)

Sorry guys. I have a Precision 76 GTS with 3.5" DP now. Exhaust housing is .81 a/r

Sluggish

iTrader: (10)

I just ordered a TU1 to try. I have been running a 239/233 but the car just doesn't run as well as it should.

XtremeDime

iTrader: (16)

What do you mean it doesnt run as well as it should? Are you expecting more power? Is the powerband in the wrong spot?

skyhighsami

iTrader: (8)

I vote custom grind. You don't buy one size fits all clothes so why buy a one size fits all cam?

XtremeDime

iTrader: (16)

I dont think my build is exotic enough to merit a custom cam? Its just a 76 on a stock ls1.

Frans96SS

iTrader: (15)

Agreed.

XtremeDime

iTrader: (16)

My only concern is that everything I had read about LSA and turbos is that it should be 114+ on a cam. Maybe 113 is close enough, lol

Sluggish

iTrader: (10)

The car has the stuff to run 9s @ 140. It doesn't seem to respond to changes in boost and timing. It probably isn't a can issue I'm just out of ideas. Next step will probably be a part out.

Hi Volume

iTrader: (3)

speed inc Tu1, its perfect.

Its not too agressive( IE 600+ lift) but just agressive enough. Valvetrain will be stable at its intended RPM range and easier to tune with, rather than a gnarley *** cam.

Just my $2 dollar bill

qqwqeqwrqwqtq

TU1 has made over 900rwhp with a 76GTS on a 346.

engineermike

This is my favorite, followed by the TU1.

My own cam testing, as well as INTM8's, showed that reverse-splits don't work that well. I lost power going from a 224/236 to a 224/224. He gained power every time he added overlap. Both of these test results go against the "common logic" of turbo cam choice.

98Z28CobraKiller

iTrader: (17)

I'd still go reverse split on that.

98Z28CobraKiller

iTrader: (17)

You guys are making very generalized comments here. Every combo is different. You aren't even on an LSx platform. You are talking apples and watermelons here.

engineermike

Sure, but people have been touting reverse-splits for LTx and SBC's for years, and they don't work that well on those. I don't see where the physics of the LSx is that much different (v-8, 2v, similar cid, similar pressure ratios).

I've never seen a back-to-back dyno test where a reverse-split gained power over a conventional split. I have seen the opposite.

98Z28CobraKiller

iTrader: (17)

I don't run a reverse split in mine nor am I saying that reverse split is the answer to all your turbo cam needs. But when you are running a small exhaust housing for the cubes, a reverse split is beneficial IMO.