grngryoutmyway

iTrader: (1)

Haven't heard of anyone getting it installed on a running car yet. There are some clips on youtube of the fourthgen kit. Should be fairly close if you are running an LS.

crazynights

iTrader: (3)

Thanks, I just listened to some clips. Seems to be quieter than a Mufflex.

84 1LE

iTrader: (9)

Mines pretty quiet, but I do have dual cats per side.Even when crusing though it's not that loud.Only when I get on it does it wake up.

timonator

iTrader: (4)

I'm still waiting for the motor mounts. Word is that they're on backorder until April 6th.

timonator

iTrader: (4)

I bought this system with the headers and everything, but I decided to sell my car before installing if anyone is interested, I still have it all new in the box unopened.
http://chicago.craigslist.org/nwc/cto/5539634540.html

thunder57

What's the general consensus on the exhaust system? Worth the coin? Any exhaust clips?

robguitargod1

iTrader: (4)

This is what you want, trust me! If you drive your car everyday a loud exhaust will get old FAST.

84 1LE

iTrader: (9)

I'm not complaining.Nothing on my car makes one think its nothing more than just a Camaro with GTA wheels.

redmaroz

iTrader: (4)

So I read through all of this thread and the one on ls1tech so im not sure if I missed it or not. But will the swap headers work with the 1 inch set back adapter plates and factory k-member? Trans-Dapt Performance Engine Swap Motor Mounts 4595 is what I used but with the 92 style motor mounts, not the ones shown in the link.

toddoky

There's no way to say from an official standpoint as the headers were designed to function as an integrated part of the Hooker 3rd-gen swap system and not as a universal-fit components. You might get lucky and get them in, or you might end up in a messy situation.

grngryoutmyway

iTrader: (1)

I'm using the Spohn/Hawks engine mounts and factory K member. Fit just fine. I believe the spacing on those and the set back plates is the same, but I'm sure someone can clarify that.

redmaroz

iTrader: (4)

Thanks guys i appreciate it, im going to give it a shot and see what happens. Worst case scenario they don't work and i have to return them. Ill post up my results here in a couple weeks.

redmaroz

iTrader: (4)

Still waiting on the headers to show up, hopefully it will be here soon. Its the last piece to get my car back together, but ill let everyone know the outcome.

BADNBLK

iTrader: (11)

Got my set up installed...







I don't have the car running yet, so sound clip and more pics will have to wait.

V6canvas

iTrader: (1)

Very nice looking! I'd love to redo mine for that extra ground clearance, my y-pipe goes under the trans x-member.

R13_Braz

Damn, that's gorgeous... and the exhaust system is too! lol. I just sat here staring at your whole setup for a solid 10 minutes.

BADNBLK

iTrader: (11)

grngryoutmyway

iTrader: (1)

Is that your fuel line running through the frame rail?

BADNBLK

iTrader: (11)

Yes it is. Good eye.

6speedIROC

iTrader: (3)

Can someone measure and post up here the driveshaft u-joint angles at ride height after installing these motor mounts and T-56 cross member? Better yet, engine, driveshaft, and pinion angles.
For ride height , a measurement from the top of the axle tube to the frame would be good..to compare apples to apples.
Thanks in advance.

redmaroz

iTrader: (4)

Well...they fit. Wasn't the easiest header install ive done, but the fit like a glove once in there. Other than having to undo the passenger side motor mount like the directions say. The only real issue i ran into was putting my starter in, didnt want to clear the headers and the stock fbody oil pan oil level sensor, but no biggy i got it to work. Ill post up some sound clips soon, ive got to do some tuning work for the heads and cam. But definitely a solid peice.

grngryoutmyway

iTrader: (1)

Daughter throwing in some commentary lol. This is with the Kooks headers, but the hooker duals. My phone seems to even out the sound so it doesn't peak, it is actually pretty loud, I'm also cammed and PP heads and a few other things.

toddoky

I'm glad to hear that worked out for you redmaroz. The headers were designed for use with the Holley 302-2 pan, so the issue you had installing them with your oil level sensor won't be encountered by someone using the 302-2 pan. See if you can get some undercar pics posted also when you get the chance.

BADNBLK

iTrader: (11)

I'm running the f-body pan, and mine fit like a glove. I went in from the bottom, and didn't even need to pull the plugs out, but I did pull the starter before hand as it was obvious is wasn't gonna work with that installed... I guess like they say, every one is different.

redmaroz

iTrader: (4)

toddoky, do you know what heads the headers are compatible with? Do they work with aftermarket heads that have plugs in different locations, or are they gm castings only?


Thanks,
Jay

toddoky

I can't say what specific aftermarket heads they will work with, but they provide more spark plug clearance than any other headers I'm aware of...look closely at their bend geometry around the plugs and you can see that I invested a lot of effort to maximize clearance around every plug/boot.

redmaroz

iTrader: (4)

Ok thanks for the quick response. I didnt think there would be any issues, just wanted to check before i did anything.

Thanks

91firebird5.0

Has anybody had any success with using there original driveshaft with this holly system?
Thanks,

BADNBLK

iTrader: (11)

I am using mine with my T56, and Moser 9" rear end. The 9" might be the key on this though, as it was nearly bottomed out prior to LS swap.

91firebird5.0

Badnblk thanks for the info! I'm gearing up for my ls1 & t56 upgrade. Can't wait to get started. Love your set up for everything. Love the hooker exhaust!! I want the long tube but I may have to go with shorties to try and fit some small cats in next to the transmission. I would rather not!!

BADNBLK

iTrader: (11)

With the t56 I bet you have more than enough space and clearance to install some high flow bullet cats on each side of the trans.

grngryoutmyway

iTrader: (1)

This is with the Kooks to the Hooker. Pipe I made is basically just a small tight bend and maybe 4" of straight pipe to connect the two. Doubt it is enough room for a cat. If you want the long tubes you might as well get them since either way you will probably have to cut the exhaust up a bit to fit cats.

BADNBLK

iTrader: (11)

I think bullet cats could be worked in next to the trans?

grngryoutmyway

iTrader: (1)

Yes, sorry if my post was confusing. You definitely have room for cats on the exhaust. Just not in a pipe from shorter headers to the exhaust, so you might as well buy the headers you want.

91firebird5.0

Thanks guys for the info! I have decided to get the long tubes along with the rest of the system, mounts, cross member, exhaust. I like that there is a system that all works together. Do you know if Holly has had in the past a Labor day sale? I would love to buy the whole kit at one shot and if I could save a little that would be awesome!!

91firebird5.0

Toddoky thank you for all your post hear and on the ls1 tech forums! It is great to have an insider that can help us with our builds and teas us with a really nice system!!

BADNBLK

iTrader: (11)

Few new pics of mine on the ground....






I get so many compliments on the sound, and the look for those willing to lay on their bellies to see it beyond the tips haha!

Thanks again Toddoky! Those quarter panels were looking a lil empty

toddoky

You've accomplished great end results with your car and the Hooker Blackheart decals look awesome on the quarter panels...congratulations on the award!

WTR388

How about a few sound clips?
Whats the sound like when you're decelerating from higher rpm while in gear and not on the brakes? My Dynomax LM1 copy has a noise I hate in that situation around 2500rpm... And I want to build my own exhaust system similar to this.

redmaroz

iTrader: (4)

Hey Toddoky, is there an individual part number for the mufflers that come with the true dual exhaust kit?

toddoky

We utilize these particular mufflers in a few different exhaust systems, but they are not available as stand-alone components at this point in time.

redmaroz

iTrader: (4)

Ok cool, thanks man.

crazynights

iTrader: (3)

Do you think the 70501426RHKR will be avail soon? I see it's backordered.

dennisbernal91z

iTrader: (2)

toddoky - Any idea what the flow rate is thru the true dual Black Heart system is?

I want to install this on my 390 SBC with an F1 Procharger pushing about 14psi. This should net me near the 700 HP mark and I want to make sure this has enough flow to support that. I think it does, but thought it would be nice to see if you guys over at Hooker had some hard numbers on flow to to along with the system.

Thanks for any help that you can provide.

skinny z

Interested to know those numbers as well.

Lurbie

iTrader: (3)

Read post #18 of this thread
https://www.thirdgen.org/forums/exhaust/732243-hooker-blackheart-exhaust.html#post6035112
He answered this there. This won't support your setup.

skinny z

Thanks for that Lurbie. I hadn't come across that thread before now.
Although he does offer an answer by way of comparison, it would be interesting to know how exactly he arrived at his conclusion. Being in his position he undoubtedly has access to all sorts of flow data regarding the CFM of his engineering efforts. And I would like to see them.
Short of that, it's a matter of taking the man at his word (and an educated, engineering word I should add) and go from there.
Fortunately for me, I don't have the same need as Dennis does. Or unfortunately depending on how you compare the two situations. I'm at best, about 450 HP.
Thanks again Lurbie.

alan91z28

so quick question regarding UMI tubular k-member... has anyone used the holley ls swap parts yet with this k-member?

my son and i are going to swap out his sbc for an ls3 in his formula that already has the umi k-member installed.

the holley motor mounts utilize mounting holes on the factory k member that normally where for the v6 in some spots vs the forward v8 holes... on the umi k-member the pad only was made for the v8 holes... i can fab something up, just wondering if anyone else has done this yet

i am thinking about taking the umi lsx mount adapter and basically grinding off their existing mount arms and fabricating arms to weld in the right spot...

LS2Swapped92

Spohn kmember and motor mounts, with hooker crossmember. Redesigning my exhaust myself in my garage, not too bad imho.

Way better than anything else offered on the market right now. Worth the $300

TORN

iTrader: (17)

3 inch?