1967 Dodge D100

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0xDEADBEEF

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Welp, I called up Huron Speed today. Cost me some money, but I think it's going to make the hot side install easier and yield a better result. I got their downpipe which is made to work the manifolds I got secondhand on market face.

I also decided to the ditch the eBay GT45 turbo for a VS Racing 7875.
 

0xDEADBEEF

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So today I tried porting this knock off Dorman truck intake. It's nothing like either the stock truck intake or the TBSS intake. Some folks say it's some kind of knock off a FAST because it's a 3 piece intake. Richard Holdener dyno'd this intake and found it to be basically a mirror image of truck intake but down a little bit on power everywhere. It has these huge blockages in the runners, so I decided to have a go at it.

I don't think I did a good job. I ran out of sanding drums and stepping back and looking at it, the ports are probably already too big. It might be trash now.

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618 Syndicate

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If it's not the original engine, what difference does it really make? It's just brand loyalty, which is dumb, IMO.
I think it's kinda cool to do a modern power train in an old vehicle from the same manufacturer, but it's unnecessarily expensive. If it were me, and I had the money, a hellcat setup would have been tìts in your truck.
Since it's not me, and I don't have the money, fwiw I think the route you're going is badass.
 

0xDEADBEEF

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I think it's kinda cool to do a modern power train in an old vehicle from the same manufacturer, but it's unnecessarily expensive. If it were me, and I had the money, a hellcat setup would have been tìts in your truck.
Since it's not me, and I don't have the money, fwiw I think the route you're going is badass.

I thought long and hard about it. The cheapest I could find a Hellcrate was about 13K, but that was motor only. By the time you add a trans, accessories, intake, computer, all that stuff it was over 20k. Granted, that was all new but even complete JY takeouts were around 15K.

For 20k I could buy a pretty nice muscle truck that was already built.
 

618 Syndicate

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I thought long and hard about it. The cheapest I could find a Hellcrate was about 13K, but that was motor only. By the time you add a trans, accessories, intake, computer, all that stuff it was over 20k. Granted, that was all new but even complete JY takeouts were around 15K.

For 20k I could buy a pretty nice muscle truck that was already built.
I get it. You and I both know that LS motors make more power cheaper than anything else.
 

stutaeng

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So today I tried porting this knock off Dorman truck intake. It's nothing like either the stock truck intake or the TBSS intake. Some folks say it's some kind of knock off a FAST because it's a 3 piece intake. Richard Holdener dyno'd this intake and found it to be basically a mirror image of truck intake but down a little bit on power everywhere. It has these huge blockages in the runners, so I decided to have a go at it.

I don't think I did a good job. I ran out of sanding drums and stepping back and looking at it, the ports are probably already too big. It might be trash now.

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Is that a composite material you are porting?

What about the heads? Don't you need higher flowing heads if you are running turbo? Are the LS3 heads still supposed to be good heads on a CFM/$ ratio?

Edit: I see that intake has rectangular ports...

How many atmospheres are you planning on running anyway? :D
 
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0xDEADBEEF

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Is that a composite material you are porting?

What about the heads? Don't you need higher flowing heads if you are running turbo? Are the LS3 heads still supposed to be good heads on a CFM/$ ratio?

Edit: I see that intake has rectangular ports...

How many atmospheres are you planning on running anyway? :D

They're actually cathedral ports that I took too much material out of. Yeah, it's whatever plastic they make these intakes out of. Luckily it was a cheap eBay POS to begin with. I have 2 other truck intakes laying around I can use.

I'm going to put an 8 psi spring in the wastegate and probably just run it on the spring. Call it 1.5 atmospheres.

When you are running a properly sized turbo, the turbo is the limiting factor. It doesn't matter what heads, intake, cam, or even displacement. An 800 HP turbo will make 800 HP on a 4.8, 5.3, 6.0, etc. What changes is the amount of boost it takes to make the 800 HP. It might be 18 on the 4.8 and 10 on the 6.0. (Totally made up numbers, but illustrative.) It will also be less laggy with a stronger engine.
 

618 Syndicate

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When you are running a properly sized turbo, the turbo is the limiting factor. It doesn't matter what heads, intake, cam, or even displacement. An 800 HP turbo will make 800 HP on a 4.8, 5.3, 6.0, etc. What changes is the amount of boost it takes to make the 800 HP. It might be 18 on the 4.8 and 10 on the 6.0. (Totally made up numbers, but illustrative.) It will also be less laggy with a stronger engine.
A turbo doesn't make power, that's a common misnomer. They flow air that's capable of supporting power, but it's just potential until you factor everything else in.
Boost pressure is nothing more than a function of restriction. For a given boost pressure a bigger turbo will flow more air than a smaller one, supporting more power.
Turbo size has more to do with lag than engine size. Theoretically a larger engine will have more exhaust volume and spin a turbo faster, but in practice frame and compressor size are how lag is determined. Or anti-lag tuning, but that's a whole other animal.

You may know all this already, I just wanted to point out a few things.
 

0xDEADBEEF

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A turbo doesn't make power, that's a common misnomer. They flow air that's capable of supporting power, but it's just potential until you factor everything else in.
Boost pressure is nothing more than a function of restriction. For a given boost pressure a bigger turbo will flow more air than a smaller one, supporting more power.
Turbo size has more to do with lag than engine size. Theoretically a larger engine will have more exhaust volume and spin a turbo faster, but in practice frame and compressor size are how lag is determined. Or anti-lag tuning, but that's a whole other animal.

You may know all this already, I just wanted to point out a few things.

I'm very much a neophyte in this area. I've had a couple of turbo vehicles before, but I've never done this sort of thing before. Always learning.
 
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