qwiktim

iTrader: (7)

Does anyone have any actual data or dyno experience comparing the Hi Ram against a stock LS3 intake with boost? A dyno comparison on a 408 ish motor with 20-25 psi would be great info.

Anyone have or know of anything?

JoeNova

This literally took 10 seconds on Google.
https://ls1tech.com/forums/dynamometer-results-comparisons/1488665-tested-holley-hi-ram-ls3-intake-vs-stock-ls3-45-rwhp-gain-stock-ls3-heads.html

qwiktim

iTrader: (7)

You're an awesome Googler but that's not what I asked for.....that's NA, I am looking for results with considerable boost involved.

JoeNova

Boost will magnify the gains. It should be hard to determine how much power it would have gained at 15 PSI.

If you're looking for an exact HP number at 20 PSI, you aren't going to get anything useful. Every setup will gain different amounts of power even at the same displacement depending on head flow, cam size, back pressure, TB size, etc.

qwiktim

iTrader: (7)

Thanks for your input.........With all that being said.......let me ask again....

Does anyone have "any" comparison data on a boosted application?

RoidedSS

i would have to take a guess that the numbers would be slightly amplified. From any data I have seen, the numbers have been greater on a turbocharged application. Unfortunately, I haven't seen any ls3 vs. high rise applications, but you have to commit to the idea of 5-30rwhp being worth the 5-700 dollars the high rises are running. The higher you spin the motor, the more power you should be able to put down with that intake, at least when comparing the runner length.

stevieturbo

Finding info like that seems incredibly difficult, if people genuinely do back to back tests...nobody seems to shout about how fantastic the gains were, especially those making or selling the intakes which I find strange.

But that n/a graph is really meaningless given cam and overall build. They dont even start the graph til over 5k, so certainly below and off boost, the HiRam could well be much worse.

But it does seem fairly consistent opinions that the HiRam should extend the upper rpm power if nothing else and tat in itself could be handy if you need to use higher rpm's
And if you have hood clearance, they do look good.

qwiktim

iTrader: (7)

This is exactly my concern and what warranted this post. Maybe the boosted results aren't "fantastic" at all...... I already have the Hi Ram and 102 throttle body, but only want to use it if it is a sizable gain over a stock LS3 intake and 90 mm tb. This will dictate the entire direction of my build......if I use the Hi Ram, the car will take a turn toward "hey look at me, I'm fast" ... if not it will be toward the sleeper side and very low key......... so any good info would be great....

408 with CNC ported LS3 heads, custom LJMS cam, and LJMS HO-ETR S484 billet with 96mm/1.58 housing..........it will be moving some air, so NA comparisons mean nothing to me...

gsteele

vs ls6 Not an exact comparison but some info. Start w/post #493.

https://ls1tech.com/forums/conversio...-build-25.html

rotary1307cc

iTrader: (5)

Lol yeah Na means nothing. :facepalm:

scottywheels

The high ram even with FI is at least rated to go to higher rpm for efficiency 8000 compared to 6500 for the ls3 ls6 and FAST. I have also seen the plastic intakes break at 20-25 psi. I am not saying they all do but I have seen it happen. I have a solid roller so the extra RPM is beneficial to me.

allmotordustin

iTrader: (1)

I could be over looking something so correct me if i am wrong.. Wouldn't you run the intake the cam was spec'd for?

stevieturbo

Which is largely why n/a results arent easily comparable.

You'd never run an aggressive n/a cam in a boosted setup, so the aggressive cam and large intake would naturally favour higher rpm's

stevieturbo

We may see some answers soon !

https://www.facebook.com/onthedyno/p...13433065363224

ezstriper

I would really love to a comparison as well, we are running a stock truck L92 intake with a 102mm TB, other combo used a early truck w/stock TB @25psi, made good power(no dyno figures, did go 5.51 @126.8 @3325lbs) no issues with plastic intake...