C4 Tech/Performance L98 Corvette and LT1 Corvette Technical Info, Internal Engine, External Engine

Any recommendations for porting a Superram?

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Old Jan 12, 2021 | 07:03 PM
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Default Any recommendations for porting a Superram?

I'm thinking of getting my Superram ported. These days it's hard to find anyone who even knows what the Superram is, much less someone who has experience porting it. Due to its rarity/value, I want to be sure the porting is done by someone who knows what they're doing.

Does anyone have any recommendations? I'm in central VA, but I can ship it if necessary. Would I ideally bring in my heads as well so they could port match the base to them?

I know you need to extrude hone a SR to get the most out of it, which means $. I think I've heard the base is usually the biggest restriction, so I might just see about getting that ported depending on cost.
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Old Jan 12, 2021 | 07:27 PM
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I just called Extrude Hone in SoCal. They want 800 to extrude hone a SuperRam. Here are pictures of mine.




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Old Jan 12, 2021 | 07:35 PM
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Super super helpful as always, thank you! So, extrude hone and it's good to go? No hand work necessary?
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Old Jan 12, 2021 | 07:39 PM
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Mine looks the same. I bought it already honed.

seeing those gaskets still on the intake brings back many memories of gasket scraping with a razor blade and cut fingers.

Until I finally got it worked out, I used to buy gaskets kits 3 at a time. Probably had it on and off ten times. The one that pissed me off the most was having to take it off to change a fpr diaphragm cause of those stupid security torx bits.

good luck with your project. Keep those old super rams bolted up and ripping.
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Old Jan 12, 2021 | 07:45 PM
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Originally Posted by Deepa
The one that pissed me off the most was having to take it off to change a fpr diaphragm cause of those stupid security torx bits.
AMEN!! And I did mine, got it 90% back together, and realized I'd clocked the FPR wrong so the vacuum line wouldn't go on. The pain.

And thank you!

Last edited by C4ProjectCar; Jan 12, 2021 at 07:46 PM.
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Old Jan 12, 2021 | 08:11 PM
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Originally Posted by C4ProjectCar
Super super helpful as always, thank you! So, extrude hone and it's good to go? No hand work necessary?
Just tell them if you are a 1205 or 1206. The rest was done.

Originally Posted by Deepa
Mine looks the same. I bought it already honed.

seeing those gaskets still on the intake brings back many memories of gasket scraping with a razor blade and cut fingers.
One thing I learned was to rtv the gaskets on ones side and apply white lithium grease on the other. When it came down to removal, the lithium side would separate and the gasket could be reused over and over. This worked on the plenum to runner gaskets and the runner to manifold gaskets. One set would last a dozen teardowns.

Last edited by 383vett; Jan 12, 2021 at 08:13 PM.
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Old Jan 13, 2021 | 04:27 PM
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I had a ton on photobcuket once again locked out
Base and runners taken out quite a bit...some were siamesed and the lid matched, others not.
Its a crapton of work and time....never got EH personally but have bought cars with it done. If you get an aggressive job Id go for it.
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Old Jan 13, 2021 | 05:30 PM
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Extrude honed is the way, I bought mine that way.
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Old Jan 13, 2021 | 08:05 PM
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Guys have any before and after dyno testing, flowbench data, or even before and after track times?

I have only seen before/after dyno data from richard holdener done with the tpi stock then extrude honed.
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Old Jan 13, 2021 | 08:44 PM
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Is it possible Linfenfelter has some knowledge? I know it is an obsolete platform but somebody there might have a set up for it?
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Old Jan 13, 2021 | 10:36 PM
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Hummm, only another 800.00........... nothing compared to what I already have "invested". Might have to start thinking about it.
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Old Jan 13, 2021 | 10:46 PM
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I posted this timeslip on a previous post. 9 years ago, I ran an extrude honed SuperRam on a fresh 406. These things can move.


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Old Jan 14, 2021 | 09:18 AM
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have a few on this forum be damned if I can remember all their usernames
steviedr, slickfx3 and one (cant remember his username) but Mike..his 383 with a sr ported to the point of needing epoxy, a healthy Jones cam made 450+ to the ground with a rediculous amount of tq
Took his 195 Afrs and picked them up some more. That car was fast...dont know if he made it in 10s or not he was breaking parts
Stevie dr picked up 2xrwhp and almost 50lbs just doing the intake and nothing else. Threads are somewhere on here.
Keep all flowsheets but they are buried, in the middle of spring cleaning.
800 sounds about right, its getting that "extra" out of your parts that costs...go for the extrude hone I say.

Last edited by cv67; Jan 14, 2021 at 09:37 AM.
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Old Jan 14, 2021 | 06:43 PM
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Originally Posted by Bill Chase
Guys have any before and after dyno testing, flowbench data, or even before and after track times?

I have only seen before/after dyno data from richard holdener done with the tpi stock then extrude honed.
Yeah, before/after always interests me. I could swear I read somewhere SR cfm numbers before and after extrude hone, but I can't find them.

Originally Posted by aklim
Is it possible Linfenfelter has some knowledge? I know it is an obsolete platform but somebody there might have a set up for it?
Lingenfelter used to port them, but last I heard of anyone getting one ported there was around 2004.

Originally Posted by cv67
have a few on this forum be damned if I can remember all their usernames
steviedr, slickfx3 and one (cant remember his username) but Mike..his 383 with a sr ported to the point of needing epoxy, a healthy Jones cam made 450+ to the ground with a rediculous amount of tq
Took his 195 Afrs and picked them up some more. That car was fast...dont know if he made it in 10s or not he was breaking parts
Stevie dr picked up 2xrwhp and almost 50lbs just doing the intake and nothing else. Threads are somewhere on here.
Keep all flowsheets but they are buried, in the middle of spring cleaning.
800 sounds about right, its getting that "extra" out of your parts that costs...go for the extrude hone I say.
I've been making a list of all the fast SRs on the forum. I'll post it with details when I'm done, but the main ones I found were hookedup, corkvette1, 0ski_dwn_it, bjankuski, cypher85, 85vet, Beach Bum, 383vett (obviously), and Hole-shot. I'll check out steviedr and slickfx3 to add them to the list. Seems like most people with fast SRs are breaking parts because of how hard they launch, and I think most people go to the MR before they swap a solid rear axle.

I'm torn, because a Procharger kit would get me more hp per dollar, but I'm not sure if I want to drop $10k on the car right now for the kit and all the supporting mods... decisions, decisions.
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Old Jan 19, 2021 | 12:37 AM
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11 years ago, I ported the crap out of my 383 intake. It took hours and hours and hours and hours. It didn't help that I didn't have air tools!

The picture below gives you an idea of how much I did. My point is, after all that porting, I would have chosen Extrude honing given the chance for a "do-over". It's not because I don't think I did a good job. It's a combination of two things:
1) It was a lot of damn work that I would NOT be excited to do again.
2) No matter how good hand-porting is, FORCING abrasive material through ports seems the better option. By default, it's going to remove material at the "pinch-points" (tightest bends) and remove it evenly throughout the ports. In a way, you can think of it as a trillion years of abrasive air erosion in the ports...making it bigger and bigger.

Plus, as shown, the results can be impressive.






Last edited by GREGGPENN; Jan 19, 2021 at 12:37 AM.
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Old Jan 19, 2021 | 08:21 AM
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Thanks!

Years ago, I gasket matched and mildly ported my intake base with a dremel. Even that took me a good number of hours, and I totally regret it. There was no noticeable improvement, and if anything I probably just made airflow inconsistent cylinder to cylinder.
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Old Jan 19, 2021 | 10:26 AM
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Originally Posted by C4ProjectCar
Thanks!

Years ago, I gasket matched and mildly ported my intake base with a dremel. Even that took me a good number of hours, and I totally regret it. There was no noticeable improvement, and if anything I probably just made airflow inconsistent cylinder to cylinder.
Why do you think that you can notice any improvements? The Butt-O-Meter isn't that sensitive to a few HP. I don't know if many of us can tell if there is a 10 HP increase.
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Old Jan 19, 2021 | 11:55 AM
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Originally Posted by aklim
Why do you think that you can notice any improvements? The Butt-O-Meter isn't that sensitive to a few HP. I don't know if many of us can tell if there is a 10 HP increase.
I'm not saying that gasket matching does not have gains, nor am I saying that I would be able to notice any gains it yielded for me. I'm saying I did a total hack job that probably did not help things.

Last edited by C4ProjectCar; Jan 19, 2021 at 11:55 AM.
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Old Jan 19, 2021 | 12:26 PM
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Originally Posted by C4ProjectCar
I'm not saying that gasket matching does not have gains, nor am I saying that I would be able to notice any gains it yielded for me. I'm saying I did a total hack job that probably did not help things.
I disagree. I think you may have done something positive for increased flow. It might be that the ROI isn't significant but I think you may have helped it a little.
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Old Jan 19, 2021 | 05:04 PM
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Originally Posted by aklim
I disagree. I think you may have done something positive for increased flow. It might be that the ROI isn't significant but I think you may have helped it a little.
Well, I hope so! I'll have to post some pics when I get the engine apart eventually.
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