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

My C4 HSR has arrived

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Old Nov 11, 2008 | 06:51 PM
  #21  
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Here's a link to that test for anybody that may not have had the chance to read it yet......

As far as TPI motors go, I don't think there has ever been a better test than this with aftermarket intakes....

http://www.compcams.com/Community/Ar...?ID=1737510521
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Old Nov 11, 2008 | 06:53 PM
  #22  
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Originally Posted by Shinobi'sZ
Convas

Is there a link for the modded HSR?

Thanks

http://www.usmracer.com/Induction-Fuel_c_19229-1.html
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Old Nov 11, 2008 | 06:59 PM
  #23  
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Originally Posted by Beach Bum


I would run the HSR, and might someday still, but I already own the Miniram, so will start with it on my big cube motor...... I think I am going to wait for somebody to have one just sitting around while they are awaiting their engine build or something and borrow it and do my own comprehensive track comparison test of the MR vs HSR on a big cube sbc...... I'll do the same with a Superram if somebody has one laying around, I sold mine a while back.
What size is your miniram 1204 or 1205? If you decide to sell and I haven't purcahsed an HSR I would be interested in buying it.

Thanks!
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Old Nov 11, 2008 | 08:35 PM
  #24  
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I think I am going to wait for somebody to have one just sitting around while they are awaiting their engine build or something and borrow it and do my own comprehensive track comparison test of the MR vs HSR on a big cube sbc...... I'll do the same with a Superram if somebody has one laying around, I sold mine a while back.
My buddy was actually gonna give me his miniram to see if it would help my motor or not, and it woudl have been an AWESOME comparison as i havent seen one like that on a built motor except in that article above, but unfortunately i decided to go boosted over winter so i'll keep my HSR
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Old Nov 11, 2008 | 09:04 PM
  #25  
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Originally Posted by Orr89rocz
My buddy was actually gonna give me his miniram to see if it would help my motor or not, and it woudl have been an AWESOME comparison as i havent seen one like that on a built motor except in that article above, but unfortunately i decided to go boosted over winter so i'll keep my HSR
I did a Miniram vs Superram test a few year back.... exact same everything, except the two intakes. I threw in a bone stock tpi system in the test for good measure..... it lost. ....but actually didn't do as bad as one would think. I was also lent an HSR modified to fit under the vette hood years ago to do a SR vs HSR test..... but I couldn't get the HSR to seal.... no matter what, it turned my coolant into a milkshake..... so I gave it back.... later on, I found out some of the intakes were designed for use with the Holley 20 degree cylinder heads... maybe I had one of those, I don't know. I did have it on long enough to take it on the street, and with zero tuning, for whatever its worth....it felt great and ran smooth.

If you want to try a Miniram for a test, let me know, I have one with fuel rails, adj fp regulator and 58 mm tb ready to go.... I'll ship it out to you this week. But, I'll need it back sometime within the next month or two to complete my installation. But, if you're going to do it, do it right..... same track, similar conditions, no other changes and no bias..... I would be very interested in the results. I am personally only interested in track et results.... on the dyno, I think its clear, the MR nips the HSR at the peak, but the HSR wins below the peak..... but the real question is, which one wins the acceleration contest. btw, with your current set-up, I think the Superram would actually win the n/a et battle, but just barely.....loosen up the converter another 4 or 5 hundred and I think the others pass it up..... but just guessing.
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Old Nov 11, 2008 | 09:10 PM
  #26  
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Originally Posted by Shinobi'sZ
What size is your miniram 1204 or 1205? If you decide to sell and I haven't purcahsed an HSR I would be interested in buying it.

Thanks!
Sorry, at this point in time, I'm keeping it. But, you never know about the future.....
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Old Nov 11, 2008 | 09:16 PM
  #27  
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I think the Superram would actually win the n/a et battle, but just barely.....loosen up the converter another 4 or 5 hundred and I think the others pass it up..... but just guessing.
That i dont know... This car does pretty well on the top end as well as low end. 3600 stall that flashes more like 3800 seems to do well since my peak torque is constant from 4K to 4.5K rpm. Superam i dont think will flow enough out the box to compete with my mild ported HSR Miniram woudl be interesting tho

But i have a cracked flexplate i believe and wont get that fixed till over winter. car goes into winter storage in a couple weeks so no more testing/fun for me. I appreciate the offer tho
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Old Nov 11, 2008 | 09:50 PM
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Originally Posted by Orr89rocz
That i dont know... This car does pretty well on the top end as well as low end. 3600 stall that flashes more like 3800 seems to do well since my peak torque is constant from 4K to 4.5K rpm. Superam i dont think will flow enough out the box to compete with my mild ported HSR Miniram woudl be interesting tho

But i have a cracked flexplate i believe and wont get that fixed till over winter. car goes into winter storage in a couple weeks so no more testing/fun for me. I appreciate the offer tho
Oh.... for some reason, I thought you only had a 3000 rpm converter..... yeah, with a 3600 it probably does pass up the SR..... but just barely, I think the SR is a very underrated intake system, if you ever have the opportunity slap one on for a weekend, try it..... and it'll like that converter very much too.

Sorry to hear about the flexplate..... bummer !
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Old Nov 12, 2008 | 12:16 AM
  #29  
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no big deal, its an easy fix. I guess it didnt like those nitrous shots off the line.

I will add, i've seen a ported superram on a 406 motor with a 280xfi cam make over 400whp and its smog legal in california had a good 40lb ft of torque on my motor too, which is insane as i put down a fairly healthy 380wtq
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Old Jan 22, 2009 | 04:10 PM
  #30  
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How did this turn out, is it running yet?
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Old Jan 22, 2009 | 07:05 PM
  #31  
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Old Jan 23, 2009 | 02:28 AM
  #32  
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Originally Posted by Beach Bum
My only basis for comment on the HSR is the SuperRod test done several years ago ....., they tested just about every TPI intake in the book and I personally thought the HSR won the test..... going out of memory
http://www.compcams.com/Community/Ar...?ID=1737510521
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Old Jan 23, 2009 | 10:09 AM
  #33  
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Convas is doing some other work to the engine, so he may not be done yet. I've been in touch with him as I'm eager to hear of the install...
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Old Jan 23, 2009 | 01:12 PM
  #34  
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The welds look sloppy, hopefully the manifold isn't warped from the welding process. If I were you I would make sure that its all straight before installation.
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Old Jan 23, 2009 | 04:04 PM
  #35  
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Originally Posted by Shinobi'sZ
Great...only dilema now is weighing the cost between a Miniram and modified HSR to fit underneath my 91 stock Formula hood. Those numbers and info provided is exactly what I was looking for especially with respect to the heads because I planned on keeping my 350 and just adding one of those intakes, headers, and possibly a cam...I will probably wait on the heads.

Intake will definetly be my first motor mod...then headers. Already added a catback.



Convas

Is there a link for the modded HSR?

Thanks
Are you absolutely sure you have to modify anything to make it clear your hood? A friend of mine just put one on an 89 IROC and I don't recall him mentioning any hood clearance issues at all. It could be that he didn't tell me, or I don't remember.
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Old Jan 24, 2009 | 05:43 AM
  #36  
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Originally Posted by LD85
How did this turn out, is it running yet?
Unfortunately still not running, I have sent the heads out to get them cleaned up and have not got them back yet.
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