I may pull my Superram off to get a little bit more RPM range. I had a Miniram before but from what I am told, the Stealth is in-between the SR and MR with regard to RPMS.

I have a 406CI with a 233/233 HR cam and AFR 210 RR heads, ZF 6 speed with 3:45 rear gears.

TIA

 

with the cam i have, i'll get 66-6700rpms. Never really looked into how much impact the blower has on the stealth ram rpm capabilities though.

 

The HSR may not match up well with your heads - they are matched for a 1205 intake gasket (AFR 195's). I suspect you are using a 1206 (or bigger?) gasket.

I've heard that Holley has made some mods to the base that will allow a porting to a 1206 gasket, but I haven't seen 100% confirmation on that. You may want to call them before plopping down your cash.

 

Those are some awfully low numbers for what you have. I know a few guys running stock vortecs getting the same 1/4 mile time. I would think you would be in the 11s with that setup. Are you running street tires?

 

I can weld some material to the intake so a 1206 will fit, that is not a problem.
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Yes, I was running street tires, with a 2.14 second 60 foot time @ 115 MPH, I expect that with a good 60' and slicks it would easily be in the 11's
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Also, my 1/4 mile time was on a single pass because the 4+3 crapped out on me after the run and that 12.5 was with 3.07 rear gears

I now have a ZF 6 speed w/3.45's

 

The HSR is much better around the 3000-4000 RPM area than the MiniRam is, but to go as far as to call it an in-between I'd say is a little unfair. The SR is a very well tuned intake. I really don't see a reason to ditch it in any car that is street driven and naturally aspirated. If more airflow is required, look into extrude honing it, and making a "Crack Pipe" for it per GHTPM's MagnumTPI car.

The HSR is a great budget intake if you don't have emission concerns, and the MINIRAM is awesome in many track settings, both are great for forced induction, but in a street driven N/A car, the SR just makes more sense IMO.

 

I figured because thats one hell of a trap speed. I got worried because I know someone with a 357 with a TH350 and 3.73 gears running a best of 12.4 at 106 mph with RHS vortec heads and he just started the season. I also agree that you might as well harness the power you obviously have rather than switching intakes.

 

Yeah, too much TQ with the Superram on a 406, but if I could connect I am sure it would do well.
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The 3k-4k is what I was hoping to improve really, and by in-between, I meant in terms of runner length.

I had the Superram professionally ported and I beleve that it is maxed out, I could be wrong. CFMperformance.com - Racing Head Porting Services

 

Well.... GMHTP was able to click off high 11's in a 3600lb thirdgen out of a 396 with a nearly stock SuperRam, so I really think you have more in there.

I hope you know I was comparing the HSR to the MR when I wa refering to the 3k-4k power improvement. That area is still owned by the superram overall in comparison to the other two intakes. Maybe I didn't word it clearly enough above - I have trouble with that sometimes. As far as runner length (w/ a 6" head port), the SuperRam averages 21 inches, while the HSR averages 12.26, and the MiniRam clocks in at 9.5 inches. As you can see, the HSR leans much more towards a MR than an "In between."

A lot of people have great street HSR motors... but for my money, the SR is a better manifold with enough potential for just about any motor out there. In a round about way, yes the HSR is about as "In between" as you can get, but much more towards the MR than the SR. If I were in your shoes though, I'd find a way to hook up more aggresively for lower ET's, rather than ditching a perfectly good intake.

As always, Just My Opinion, not gospel.

 

I'd say drop the HSR on and enjoy! - I'd try getting what you have to the ground first though. - My stick car cuts 1.6X 60fts on 17" nitto dr's and runs 11.7X's at over 120, and it weighs 4001lbs.

 

The car dynoed at 405 RWTQ with no tune and a messed up tranny. Now I have e Superram andI woudl bet that the RWTQ is close to 430+ RWTQ.

I agree that getting it to the ground is the key. The cool thing about a 406 is that you have plenty of TQ with just about any manifold that you choose. I got rid of the MR because the car did not really get going until @ 4800-5000+ RPM but that was with 3.07 gears. It was not very fun on the street because the SOTP happened at speeds from 50MPH.

With the SR I can nail the throttle at 35-40 and launch big time but by @ 5200-5400 its all noise and vibration. So I was wondering if the HSR would expand the RPM band up to @ 5800 RPM or so.

Now that the car is tuned and with a decent 60 foot or even slicks , I know the can do 11's.

I came here becasue a lot of you guys have the HSR and I wanted to learn more about it.

 

I too am curious what anyone has to say about the HSR on the street with your similar setup. Im with you that I wanted something that would be fun on the street. This was a big reason I chose the SR.

 

I had a 415cui 9.0:1 and SR with a CC306 in it and then changed to a HSR intake.

Had more torque with SR but I still have plenty with the HSR. Main reason for changing was the PITA install of the SR.....

Never looked back after the swap

/N.

 

Well, the SR is off, and I was looking at www.stealthram.com

Is the flow listed on this site close to reality? I would have to port the HSR pretty good to get it to flow equal to the Superram, it looks like.

 

The HSR should flow more total air. The airflow won't have anything close to the same kind of velocity from idle to 5000 RPM as in the SuperRam, but you are looking for that 5200-6000RPM worth of air anyways, so it should work out great for you.

 

Superram is gone

I am having my AFR 210's ported professionally, should flow 300CFM at .600, I was told,,, we'll see,

Once the intake is on I will decide if I need more rear gear than 3.45's, maybe 3.73'S, we'll see,

I hope to have it bolted on by July 4th.

 

the superram flows 13 cfm more per cylinder. not much porting would be needed. the runner length is way shorter and is a direct path to the head.

 

...I was waiting for you to chime in Robert.....
13cfm would not take much porting. The PITA of install(Superam) alone would be worth the swap.

 

yeah, i haven't been here in a while.