C U IN REARVEIW

How difficult of a install are these?

Streetk14

Magnuson says 10-12 hours to install. I'm pretty sure I spent a lot more time than that doing mine, but my standards for install quality are probably a little different than most.

The good news is almost zero cutting or drilling is required. A couple holes in the radiator shroud is about it. I did a whole lot of cutting, drilling, and grinding when I did my A&A install.

badmofo2u

There are Heart Beat ZL1s running a Chiller, you should contact Narush, he has the Dual Chiller setup. Here are the PDF instructions for the ZR1 single.

C U IN REARVEIW

Can the heartbeat sc be used on an ls2? Does it require ls3 heads?

old motorhead

Yes, it would require LS3 heads.

C U IN REARVEIW

Is there any plans to make an ls2 version of it? Theres a very large ls2 market out there......

monsta01

Buy my heads!

Unreal

Friend with heartbeat took this off, gained 500rwhp/550rwtq. He is happy for now with it off. He may try to mod it and put it back on later, but for now he is enjoying it as is and wants to go do some solid 200+ mile runs, then he will play with it more.

old motorhead

Wow! Who'd a thunk it...Bigger blower(s) make more power than a smaller one. Quite the revelation. That ranks right up there with Breecher's p/d blower "accomplishments"

Unreal

Not exactly. Heartbeat plus twins vs just twins.

monsta01

Race gas tune. Hoping for 10.20@138 this Saturday.

Ancient Warrior

Just got back from the dyno last night.
2009 z51 m6
376 ls3
93 octane
kooks 1 7/8"
220-240 Pat G cam
Patriot gold springs
Comp pushrods
ATI 7.96 balancer
base Heartbeat kit, 96mm pulley
installed and tuned by Backstreet Performance
606/512
9.5# boost

scottg

Great Numbers with stock pulley, Iam at 559 rw at 9lbs of boost no cam. Your numbers are what I"am looking for, I have the 84mm pulley,

old motorhead

Here's mine after curing the belt slip.

Stock crank pulley. 81mm blower pulley.
Pfadt 1.875 headers. Stock NPP exhaust.
224/234 116+2 "OM" custom cam. Alky meth.

You'll notice how much different the two runs are due to the "horrible" heat soak of this particular p/d blower (they all have it.....). Actually this graph is of run #1 and #3. I'm guessing run #2 would have slotted between 1 and 3, if it would fit

CI GS

That's pretty impressive for a stock 96mm pulley. If you're at 9.5psi with that pulley, my guess would be that you should be able pick up another ~3psi, which would be higher that anyone I've seen with the Vette Heartbeat. Add some boost with meth/race gas with a retune for those and you should easily be in the 660+HP range where monsta01 and oldmotorhead is at.

Tell us more about this ATI 7.96" pulley? We've been having discussions on another thread about pulley options.

Ancient Warrior

I belive it is an ATI 917107 shell assembley 8 rib either 6 or 8% overdrive .I have conflicting info as to what the % overdrive is. I got mine from summit but I would call ATI for the correct part number.

CI GS

Good stuff Rodney!
Too bad you're getting those huge swings in power from that "oven" you have there.
I guess that old home-spec'd cam is working out for you too, huh?
Sorry to sound like a stuck record, but just imagine what might happen if you throw that 8.2" balancer on that sucker now!

monsta01

My goal is 700whp through my auto. I really think the HB can do it. It will take heads or more boost for my auto though.

CI GS

Thanks.
The 917107 is a 8" balancer shell. (7.96")
The 917108 is the 8.2" balancer shell.(8.235")
Both cost $350 from Summit. They have the 8" in stock but the 8.2" is on backorder.
I take it that you bought the shell and installed it on the hub of a standard diameter ATI balancer?

CI GS

I'm pretty sure that a set of TFS heads would pick you up about 25-30hp.
I think that the ATI 8.235" balancer might gain you a pound of boost or two as well. It should be easy to sell your IW 8".
Did you ever get the new setup sorted? What kind of TB do you have on it now?