18 replies to this topic

[LXCHEV]

Here are some pics of my new custom fabricated extractors for my 383 Chev Torana. Thought I would snap some pics of them with their fresh HPC coating, as no doubt once the new engine is broken in, they will probably dull off. Almost too good to put back on the car I reckon...

FYI: The extractors are 1-3/4" prim into 2" sec into 2-1/2" collectors.

I call this first pic the "Jigsaw Puzzle Mess". Everything was built with flanges and slip-joints, to allow for easy fitment & removal with the engine and everthing else still bolted in place....



These next 3 pics show the passenger side pipes:







Here's a shot to show everyone that the HPC coating is done on the inside as well:



Driver's side pipes:







Quick shot of my 3 inch dumpers! These will bolt up after the mufflers and dump just before the diff (eg. for car events, drags etc). For general cruising, they will be bolted off so I can put my tailpipes back on instead.



And here we have the finished product:





This last shot shows I could also bolt the dumpers on after the extractors if running open pipes (now that would sound sweet!):



Cheers,
Brett.

[knoath]

So the last pic is what we can expect at Heathcote Brett???

[LXCHEV]

Cheers all, yes I'm very happy with the finish of the HPC. Even though they had been painted with high temp black paint, it was already peeling off and rusting up. HPC's the only way to go I reckon. I'm just very nervous about killing the finish when I break my new cam in, let's hope they don't get too hot.

knoath - If I make it to the Heathcote drag day, I will probably try a couple of passes with open pipes, why not! We gotta make lots of noise there right! But my car normally seems to run better with my system fitted, feels a lot sharper. But we'll see what happens both ways...

ChiaLX - hahaha sorry mate. But you won't regret it!

Liam - yep I had all the bolts and captive nuts done. It was only an extra $1 or $2 per bolt so I thought do it for sure. Looking back, I should have also sent them my header bolts, didn't even think about them, d'oh!

[LS1LX]

They look great, multipiece is the only true way to make working on your torana a breeze, although with all the joints your going to have to cross your fingers you dont get any exhaust leaks.

You cant win, make em 1 piece and there a shit fight to work around, get in and out. Make them multipiece and there a breeze to work around and remove but they will leak.

Gotta love that HPC, looks great before you install them, then its tears when you scratch them getting them in the car.

[LS1LX]

Sexy
Who made the pipes for you ?
I think I need some slightly bigger primaries than the Tri-Y's I have
1 3/4 has been recommended

If your making a good 450HP and over 400Ft/lbs of TQ go the 1 3/4", if not stick with 1 5/8" what you dont make up for in HP you will gain in low down TQ.

Besides the 1 5/8" give you that little extra room, less chance of pipes fouling.

If you want to gain extra HP, dont go the 1 3/4" primary, enlarge the collector to 3". You will gain more from the collector to the tips by going larger then by increasing primary size and running smaller collectors.

[dattoman]

Sexy
Who made the pipes for you ?
I think I need some slightly bigger primaries than the Tri-Y's I have
1 3/4 has been recommended

If your making a good 450HP and over 400Ft/lbs of TQ go the 1 3/4", if not stick with 1 5/8" what you dont make up for in HP you will gain in low down TQ.

Besides the 1 5/8" give you that little extra room, less chance of pipes fouling.

If you want to gain extra HP, dont go the 1 3/4" primary, enlarge the collector to 3". You will gain more from the collector to the tips by going larger then by increasing primary size and running smaller collectors.

I have jet hot tri-y's which I think are 1 5/8"
I have plugged some #'s into the desktop dyno and my expected theoretical HP is under 450 (just)
So I might stick with what I have I guess and chop off the small collectors and fit larger ones as you say.
Its a streeter not a track car so the torque is more important to me.

PBP is my work alter ego..... hence this post from me.

[LXCHEV]

Dattoman/PBP - They are the handy-work of Exhaust Worx in Bayswater, Vic. Bloke called Les. All he does is custom stuff, he loves it.

Also - just to comment - my very first set of of Tri-y's were also 1-5/8" primaries and only 2" collectors. The car still went awesome, made heaps of power & torque, and still ran 11.99 down the quarter. Just goes to show what can be achieved.

draglc - I like your idea of hanging them on the wall. Imagine sitting in the lounge-room and looking up to them! Now that's what I call serenity! hahaha

LX406 - As tempting as it is mate, I don't think I'm going to put the fresh donk on the engine dyno after all. Cash is real tight again now (credit card is beginning to warm up my pocket, don't really want to get it glowing red). And my engine guy said he wouldn't bother for this type of engine. Also, I'm pushing hard to make the forum drag day, so every single day counts now, I just don't have the time! It would be nice to get the Hp/Torque figures though, but if I did, I would want my extractors bolted on and not another set, so it kinda brings me back full circle anyway (with regard to not killing off the HPC coating)...... Who knows what I'll end up doing!!!!

As for exhaust leaks - hopefully that never becomes an issue. Only time will tell. I will be assembling the slip joints with the high-temp red exhaust goo.

[LXCHEV]

Howdy Glenn. It's spaghetti alright! hehe. I still hadn't had the car dyno'd with these pipes prior to pulling everything apart for the rebuild. I should be picking up the freshened donk early this week, so hopefully it might get fired up before the long weekend, which means I can go cruising to break it all in. Will then have it dyno'd before the Heathcote forum drag day - I can't wait to see the results, getting a bit nervous to tell you the truth. My engine made huge power with my 4-into-1's, so I'm not sure how much to expect with these Tri-Y's. We have changed my combo now too though - so there won't be any comparisons, but I just hope it puts down some good grunt. I will let you know how I go mate.

Cheers