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Improving my HCI LS1

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Old Jan 14, 2021 | 11:16 AM
  #21  
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Originally Posted by mOtOrHeAd MiKe
Max effort, or even moderate effort, H/C/I LS1 builds were the biggest scam of the last decade. The ROI was never there. I know, I drank that Kool-Aid and felt into the pit of disappointment with my wagon - nitrous was added to make up the performance gap compared to my turbo 5.3L and Procharged LS2. The only thing that the H/C/I does better than the other two is the noise it makes - it is glorious by comparison to everything else in the fleet.

So, the short answer is: boost it.
In the long run I think the car will eventually get some form of forced induction. After spending time driving my dad’s turbo 5.3 truck it definitely makes sense why it’s so popular. I think I’ll finish out the bolt on stuff that’s been recommended for the time being and start saving for a procharger setup, or start piecing one together
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Old Jan 14, 2021 | 11:21 AM
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Originally Posted by XrayVisions
In the long run I think the car will eventually get some form of forced induction. After spending time driving my dad’s turbo 5.3 truck it definitely makes sense why it’s so popular. I think I’ll finish out the bolt on stuff that’s been recommended for the time being and start saving for a procharger setup, or start piecing one together
Now you're onto something!!! If you've got boost questions there is a decent group of us who've build several setups. Feel free to ask questions.
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Old Mar 14, 2021 | 09:13 AM
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been to the track yet with the new parts ?
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Old Mar 14, 2021 | 10:29 AM
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Originally Posted by ddnspider
Now you're onto something!!! If you've got boost questions there is a decent group of us who've build several setups. Feel free to ask questions.
He is already at 11:1 compression.
How much boost can he run?
Seem's like for the cost of an fi system, it wouldn't be worth it.
If he want's to pull the engine apart and put in some different pistons to lower the compression then I could see it.
If not, then nitrous seem's like a better choice.
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Old Mar 14, 2021 | 10:33 AM
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Unfortunately, not yet. I still have the Mamo ported fast intake and tb to go on and a retune but I haven't decided on a tuner, or if I'm staying with a maf or going to a speed density setup. However, I did pick up a Dragy so I may do some before and after testing with that if I can't make it to the track.
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Old Mar 14, 2021 | 11:44 AM
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I don’t post much. More of a lurker. But I’ll say this,
I have a much larger SNS 3 cam (235/243 .630/.615) and 225 heads. Ls6 intake is my biggest bottle neck right now, pulls vacuum from 4500ish and up in my logs, I have seen as low as 87KpA@6-6500ish rpm....the longer the gear the worse it gets. I.E. first& second isn’t too bad, but top of 3rd and 4th you really see it. Might be worse if I was an auto as the skinny pedal never lifts lol.
hard for me to justify a 102 and the 600 dollars of crap on top of it to make it fit. So I’m interested to see how your 92 does as I’ve been so torn on it. I’m waiting for my car to die a knocking death and it’s hard to me to spend 1600 on an intake I won’t use on my new motor. Bad enough I’ll have over 2k in heads I’ll have to eat...it’s a fact ROI is bad on NA..always wish I would’ve went procharger. Feels like I’m digging a hole with a damn spoon while these boosted guys use a backhoe lol
But back to this case, just speaking From my logs your heads and cam should benefit greatly from a better intake as I pull a good bit of vacuum. I think youll be happy with the fast while you save for FI.
I too recently have got the dragy and it’s pretty neat, haven’t played with it much due to winter. Did one play run so far to test it

Last edited by mstansbury0704; Mar 14, 2021 at 11:56 AM.
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Old Mar 14, 2021 | 12:32 PM
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Originally Posted by dannyz
He is already at 11:1 compression.
How much boost can he run?
Seem's like for the cost of an fi system, it wouldn't be worth it.
If he want's to pull the engine apart and put in some different pistons to lower the compression then I could see it.
If not, then nitrous seem's like a better choice.
A few months back, I actually was prepared to pull the trigger on a complete nitrous setup, plate kit, dedicated fuel cell etc but as luck would have it our furnace in our home decided it didn't wanna do winter anymore, so that kind of went out the window lol. Nitrous was what I had initially put this thing together for, and the cost of entry is significantly lower than a procharger. Lot of decisions lol
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Old Mar 14, 2021 | 12:35 PM
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Originally Posted by mstansbury0704
I don’t post much. More of a lurker. But I’ll say this,
I have a much larger SNS 3 cam (235/243 .630/.615) and 225 heads. Ls6 intake is my biggest bottle neck right now, pulls vacuum from 4500ish and up in my logs, I have seen as low as 87KpA@6-6500ish rpm....the longer the gear the worse it gets. I.E. first& second isn’t too bad, but top of 3rd and 4th you really see it. Might be worse if I was an auto as the skinny pedal never lifts lol.
hard for me to justify a 102 and the 600 dollars of crap on top of it to make it fit. So I’m interested to see how your 92 does as I’ve been so torn on it. I’m waiting for my car to die a knocking death and it’s hard to me to spend 1600 on an intake I won’t use on my new motor. Bad enough I’ll have over 2k in heads I’ll have to eat...it’s a fact ROI is bad on NA..always wish I would’ve went procharger. Feels like I’m digging a hole with a damn spoon while these boosted guys use a backhoe lol
But back to this case, just speaking From my logs your heads and cam should benefit greatly from a better intake as I pull a good bit of vacuum. I think youll be happy with the fast while you save for FI.
I too recently have got the dragy and it’s pretty neat, haven’t played with it much due to winter. Did one play run so far to test it
I was torn between a 102 and an MSD intake, but a friend of mine had told me about selling his 92 for a good price and I knew he was trustworthy so I didn't have to doubt the port work being legit. MSD may be worth looking into for your setup, I regret putting together a piston/rod setup instead of saving a little while longer for a blower, but hindsight is 20/20 and at the time I put it together I was still in school on a pretty limited budget
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Old Mar 14, 2021 | 01:40 PM
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Yea I have something like 4K-5k or so into my NA top end setup just from the slugs up..I was a bit younger and stupid I guess. Lol. That’s almost a full procharger kit cost. But really I don’t regret it at all, nothing like a big cam sound, gets compliments everywhere. It runs very well and I could easily daily driver with this large cam. Had a xr275hr cam only setup and this setup pulls harder from 2500 and up and I could easily daily drive it. Only bucks a little if you idle around in 1st gear.

Don’t get me wrong, if I thought my motor would live forever I’d be on the whole 102. But I’ve got so much money into this car as is I don’t wanna put that much investment into it then not be able to use it when she pops and I get a bigger cube mill..being it has nearly full suspension, MWC 9” and being it’s the car I wanted, a WS6 with 3 pedals, I would replace the motor. if it wasn’t for this car I wouldn’t have been in the local car scene network and never have met the wonderful woman I have lmao. It’s become sentimental to me almost. Very dangerous combination of a money pit lmao

The 92/92 setup is about all I want to afford for this little Ls1. My luck is the damn thing will run for another 50k miles lmao. She piston slaps like the dickens when cold, and has lived through a ls7 lifter wheel breaking clear in half, a crazy ex dumping sugar in the gas tank and then the valve cover.. I change the oil about every 1k-2k with 0-40 and it sees abuse every time it leaves the garage. So it owes me absolutely nothing.
Still though, please do let us know how the 92/92 works vs the ls6 intake. Would be a decision maker for me.
also, I’ve read the msd doesn’t out perform the fast setups until you get into the really high rpms
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Old Apr 8, 2021 | 01:57 PM
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Mini update- Retune is planned for April 29th. Have the ported fast to put on yet. Tuner prefers MAF tuning for lower power cars that see a lot of street miles, and recommended that if I plan on switching maf sensors, they recommend the TSP 100mm MAF. So the question is.. is it worth the cost of entry for a larger maf and lid?
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